AVAHO

Research suggests certain gut bacteria can reduce the efficacy of radiotherapy against cancers, but targeting those bacteria with vancomycin can reverse this effect.

Andrea Facciabene, PhD, of the University of Pennsylvania, Philadelphia, and colleagues conducted a preclinical study in which vancomycin enhanced the efficacy of radiotherapy against melanoma and lung cancer. Now, researchers are conducting a clinical trial to determine if vancomycin can have the same effect in patients with non–small cell lung cancer.

Dr. Facciabene reviewed this research at the AACR Virtual Special Conference: Radiation Science and Medicine.

According to Dr. Facciabene, “gut microbiota” includes the more than 1,000 different strains of bacteria living in human intestines. He indicated that the average human has 10 times more bacteria than cells in the body and 150 times more genes in the gut microbiome than in the human genome.

In healthy individuals, the gut microbiota play a key role in intestinal function and digestive processes, modulation of hormones and vitamin secretion, energy extraction from food, and development and maintenance of a balanced immune system.

“Dysbiosis” is the term applied to a change in the composition, diversity, or metabolites of the microbiome from a healthy pattern to one associated with disease. Antibiotic therapy is a classic cause of dysbiosis, and dysbiosis has been implicated in a variety of inflammatory diseases.

The mechanisms by which the gut microbiome could influence systemic immunity is not known but is relevant to cancer therapy response. Augmenting the frequency and durability of response to immune-targeted treatments – potentially by manipulating the influence of gut microbiota on the immune system – could be highly impactful.
 

Gut microbiota and radiation-induced cell death

Immunogenic cell death – a process by which tumors die and release their intracellular molecular contents – is one of the mechanisms by which radiotherapy kills cancer cells.

Tumor cells succumbing to immunogenic cell death stimulate antigen presenting cells, such as dendritic cells, that engulf tumor antigens and cross-present them to CD8+ cytotoxic T lymphocytes. This process culminates in the generation of a specific immune response capable of killing the malignant cells in the irradiated area, but it also impacts distant nonirradiated tumors – an abscopal effect.

Dr. Facciabene and colleagues hypothesized that alterations of the gut microbiota could have an impact on the effect of radiotherapy. To investigate this, they studied mouse models of melanoma.

The team allowed B16-OVA tumors to grow for 9-12 days, then delivered a single dose of radiotherapy (21 Gy) to one – but not all – tumors. Simultaneously with the delivery of radiotherapy, the investigators started some animals on oral vancomycin. The team chose vancomycin because its effects are localized and impact the gut microbiota directly, without any known systemic effects.

Results showed that vancomycin significantly augmented the impact of radiotherapy in the irradiated area and was associated with regression of remote tumors.

The effects of the combination treatment on tumor volume were significantly greater than the effects of either treatment alone. Since manipulation of the gut microbiome potentiated radiotherapy effects both locally and distantly, the investigators concluded that immunogenic cell death may be involved in both the local and abscopal effects of radiotherapy.

When the experiment was repeated with a lung tumor model, similar findings were observed.
 

Involvement of cytotoxic T cells and interferon-gamma

Dr. Facciabene and colleagues found that the irradiated and unirradiated B16 OVA melanoma tumors treated with the radiotherapy-vancomycin combination were infiltrated by CD3+ and CD8+ T cells.

The investigators selectively depleted CD8+ T cells by pretreating the mice with an anti-CD8 monoclonal antibody. Depletion of CD8+ cells prior to administering radiotherapy plus vancomycin abrogated the antitumor effects of the combination treatment, demonstrating that the CD8+ T cells were required.

To characterize the antigen specificity of the tumor-infiltrating CD8+ T cells, Dr. Facciabene and colleagues used OVA MHC class 1 tetramer. Tumors from mice treated with vancomycin alone, radiotherapy alone, or the combination were dissected. Individual dendritic cells were assayed for OVA tetramer by flow cytometry.

The investigators found that tumors from mice treated with radiotherapy plus vancomycin had a significantly higher number of OVA-specific CD8+ T cells, in comparison with untreated tumors or tumors treated with either vancomycin alone or radiotherapy alone. Since antibody that impaired recognition of MHC class I peptides by T cells ablated the effect, it was clear that antigen recognition was vital.

Interferon-gamma (IFN-gamma) is known to play a critical role in both differentiation and effector functions of CD8+ cytolytic T cells in the antitumor immune response. To determine whether IFN-gamma is involved in the antitumor effects of the radiotherapy-vancomycin combination, the investigators measured intratumoral expression of IFN-gamma in the tumors 5 days after radiotherapy.

IFN-gamma messenger RNA expression levels were significantly elevated in the combination treatment group when compared with either treatment alone. In B16-OVA melanoma–challenged knockout mice, the enhancement of the radiotherapy effects by vancomycin was ablated.

The investigators concluded that vancomycin remodels the tumor microenvironment and increases the functionality of tumor-infiltrating, tumor-specific, CD8+ T cells. Furthermore, IFN-gamma is required to augment the radiotherapy-induced immune effect against the tumor.
 

Potential biochemical mediators of immune effects

The gut microbiota aid host digestion and generate a large repertoire of metabolites after defermentation of fiber. Short-chain fatty acids (SCFAs) constitute the major products of bacterial fermentation.

Acetic acid, propionic acid, and butyric acid represent 95% of total SCFAs present in the intestine. SCFAs are known to directly modulate cytokine production and dendritic cell function.

In their study, Dr. Facciabene and colleagues focused on butyric acid. Using mass spectroscopy, they demonstrated that vancomycin treatment reduces butyrate concentrations in tumor and tumor-draining lymph nodes by eradicating the major families of SCFA-producing Clostridia species.

To test whether supplementing butyrate could influence the synergy of the radiotherapy-vancomycin combination in vivo, the investigators added sodium butyrate to the mice’s drinking water when starting vancomycin treatment. The team then challenged the mice with B16-OVA tumors and treated them with radiotherapy.

In agreement with the group’s prior findings, vancomycin enhanced the tumor-inhibitory effects of radiotherapy, but dietary butyrate inhibited the benefit. The investigators found a significant decrease in the population of B16-OVA–presenting dendritic cells in the lymph nodes of mice receiving the supplemental butyrate.

Dr. Facciabene said these findings were supported by a recent publication. The authors observed that butyrate inhibited type I IFN expression in dendritic cells and radiotherapy-induced, tumor-specific cytotoxic T-cell immune responses without directly protecting tumor cells from the cytotoxic effects of radiotherapy.
 

Wide-ranging implications

Overall, Dr. Facciabene’s research has shown that:

• Vancomycin significantly enhances the tumor inhibitory effect of targeted radiation, including abscopal effects.
• The synergistic effects are dependent upon IFN-gamma and CD8+ cells.
• Depletion of some gut microbiome species increases antigen presentation by dendritic cells. This is mediated by SCFAs produced by certain bacterial families.
• There are promising new strategies to improve responses to radiotherapy, including targeting gut microbiota.

A clinical trial (NCT03546829) of vancomycin plus stereotactic body radiation in patients with locally advanced non–small cell lung cancer has been launched to investigate these findings further. Early data analysis has shown a significant impact of vancomycin on several species of gut microbiota, according to Dr. Facciabene.

Revolutionary results from immune-targeted therapy in the recent past have highlighted the important role the immune system can play in fighting cancer. Still, up to one-third of cancer patients fail to respond to overtly immune-targeted therapy.

The ability to inhibit cancer cells from evading immune surveillance by using new adjuvants – including those acting on non-traditional targets like gut microbiota – could herald the next major advances in cancer therapy. During his presentation, Dr. Facciabene gave participants an enticing hint of what could be coming for cancer patients in the years ahead.

Dr. Facciabene reported having no relevant disclosures.

Dr. Lyss was a community-based medical oncologist and clinical researcher for more than 35 years before his recent retirement. His clinical and research interests were focused on breast and lung cancers, as well as expanding clinical trial access to medically underserved populations. He is based in St. Louis. He has no conflicts of interest.

Research suggests certain gut bacteria can reduce the efficacy of radiotherapy against cancers, but targeting those bacteria with vancomycin can reverse this effect.

Andrea Facciabene, PhD, of the University of Pennsylvania, Philadelphia, and colleagues conducted a preclinical study in which vancomycin enhanced the efficacy of radiotherapy against melanoma and lung cancer. Now, researchers are conducting a clinical trial to determine if vancomycin can have the same effect in patients with non–small cell lung cancer.

Dr. Facciabene reviewed this research at the AACR Virtual Special Conference: Radiation Science and Medicine.

According to Dr. Facciabene, “gut microbiota” includes the more than 1,000 different strains of bacteria living in human intestines. He indicated that the average human has 10 times more bacteria than cells in the body and 150 times more genes in the gut microbiome than in the human genome.

In healthy individuals, the gut microbiota play a key role in intestinal function and digestive processes, modulation of hormones and vitamin secretion, energy extraction from food, and development and maintenance of a balanced immune system.

“Dysbiosis” is the term applied to a change in the composition, diversity, or metabolites of the microbiome from a healthy pattern to one associated with disease. Antibiotic therapy is a classic cause of dysbiosis, and dysbiosis has been implicated in a variety of inflammatory diseases.

The mechanisms by which the gut microbiome could influence systemic immunity is not known but is relevant to cancer therapy response. Augmenting the frequency and durability of response to immune-targeted treatments – potentially by manipulating the influence of gut microbiota on the immune system – could be highly impactful.
 

Gut microbiota and radiation-induced cell death

Immunogenic cell death – a process by which tumors die and release their intracellular molecular contents – is one of the mechanisms by which radiotherapy kills cancer cells.

Tumor cells succumbing to immunogenic cell death stimulate antigen presenting cells, such as dendritic cells, that engulf tumor antigens and cross-present them to CD8+ cytotoxic T lymphocytes. This process culminates in the generation of a specific immune response capable of killing the malignant cells in the irradiated area, but it also impacts distant nonirradiated tumors – an abscopal effect.

Dr. Facciabene and colleagues hypothesized that alterations of the gut microbiota could have an impact on the effect of radiotherapy. To investigate this, they studied mouse models of melanoma.

The team allowed B16-OVA tumors to grow for 9-12 days, then delivered a single dose of radiotherapy (21 Gy) to one – but not all – tumors. Simultaneously with the delivery of radiotherapy, the investigators started some animals on oral vancomycin. The team chose vancomycin because its effects are localized and impact the gut microbiota directly, without any known systemic effects.

Results showed that vancomycin significantly augmented the impact of radiotherapy in the irradiated area and was associated with regression of remote tumors.

The effects of the combination treatment on tumor volume were significantly greater than the effects of either treatment alone. Since manipulation of the gut microbiome potentiated radiotherapy effects both locally and distantly, the investigators concluded that immunogenic cell death may be involved in both the local and abscopal effects of radiotherapy.

When the experiment was repeated with a lung tumor model, similar findings were observed.
 

Involvement of cytotoxic T cells and interferon-gamma

Dr. Facciabene and colleagues found that the irradiated and unirradiated B16 OVA melanoma tumors treated with the radiotherapy-vancomycin combination were infiltrated by CD3+ and CD8+ T cells.

The investigators selectively depleted CD8+ T cells by pretreating the mice with an anti-CD8 monoclonal antibody. Depletion of CD8+ cells prior to administering radiotherapy plus vancomycin abrogated the antitumor effects of the combination treatment, demonstrating that the CD8+ T cells were required.

To characterize the antigen specificity of the tumor-infiltrating CD8+ T cells, Dr. Facciabene and colleagues used OVA MHC class 1 tetramer. Tumors from mice treated with vancomycin alone, radiotherapy alone, or the combination were dissected. Individual dendritic cells were assayed for OVA tetramer by flow cytometry.

The investigators found that tumors from mice treated with radiotherapy plus vancomycin had a significantly higher number of OVA-specific CD8+ T cells, in comparison with untreated tumors or tumors treated with either vancomycin alone or radiotherapy alone. Since antibody that impaired recognition of MHC class I peptides by T cells ablated the effect, it was clear that antigen recognition was vital.

Interferon-gamma (IFN-gamma) is known to play a critical role in both differentiation and effector functions of CD8+ cytolytic T cells in the antitumor immune response. To determine whether IFN-gamma is involved in the antitumor effects of the radiotherapy-vancomycin combination, the investigators measured intratumoral expression of IFN-gamma in the tumors 5 days after radiotherapy.

IFN-gamma messenger RNA expression levels were significantly elevated in the combination treatment group when compared with either treatment alone. In B16-OVA melanoma–challenged knockout mice, the enhancement of the radiotherapy effects by vancomycin was ablated.

The investigators concluded that vancomycin remodels the tumor microenvironment and increases the functionality of tumor-infiltrating, tumor-specific, CD8+ T cells. Furthermore, IFN-gamma is required to augment the radiotherapy-induced immune effect against the tumor.
 

Potential biochemical mediators of immune effects

The gut microbiota aid host digestion and generate a large repertoire of metabolites after defermentation of fiber. Short-chain fatty acids (SCFAs) constitute the major products of bacterial fermentation.

Acetic acid, propionic acid, and butyric acid represent 95% of total SCFAs present in the intestine. SCFAs are known to directly modulate cytokine production and dendritic cell function.

In their study, Dr. Facciabene and colleagues focused on butyric acid. Using mass spectroscopy, they demonstrated that vancomycin treatment reduces butyrate concentrations in tumor and tumor-draining lymph nodes by eradicating the major families of SCFA-producing Clostridia species.

To test whether supplementing butyrate could influence the synergy of the radiotherapy-vancomycin combination in vivo, the investigators added sodium butyrate to the mice’s drinking water when starting vancomycin treatment. The team then challenged the mice with B16-OVA tumors and treated them with radiotherapy.

In agreement with the group’s prior findings, vancomycin enhanced the tumor-inhibitory effects of radiotherapy, but dietary butyrate inhibited the benefit. The investigators found a significant decrease in the population of B16-OVA–presenting dendritic cells in the lymph nodes of mice receiving the supplemental butyrate.

Dr. Facciabene said these findings were supported by a recent publication. The authors observed that butyrate inhibited type I IFN expression in dendritic cells and radiotherapy-induced, tumor-specific cytotoxic T-cell immune responses without directly protecting tumor cells from the cytotoxic effects of radiotherapy.
 

Wide-ranging implications

Overall, Dr. Facciabene’s research has shown that:

• Vancomycin significantly enhances the tumor inhibitory effect of targeted radiation, including abscopal effects.
• The synergistic effects are dependent upon IFN-gamma and CD8+ cells.
• Depletion of some gut microbiome species increases antigen presentation by dendritic cells. This is mediated by SCFAs produced by certain bacterial families.
• There are promising new strategies to improve responses to radiotherapy, including targeting gut microbiota.

A clinical trial (NCT03546829) of vancomycin plus stereotactic body radiation in patients with locally advanced non–small cell lung cancer has been launched to investigate these findings further. Early data analysis has shown a significant impact of vancomycin on several species of gut microbiota, according to Dr. Facciabene.

Revolutionary results from immune-targeted therapy in the recent past have highlighted the important role the immune system can play in fighting cancer. Still, up to one-third of cancer patients fail to respond to overtly immune-targeted therapy.

The ability to inhibit cancer cells from evading immune surveillance by using new adjuvants – including those acting on non-traditional targets like gut microbiota – could herald the next major advances in cancer therapy. During his presentation, Dr. Facciabene gave participants an enticing hint of what could be coming for cancer patients in the years ahead.

Dr. Facciabene reported having no relevant disclosures.

Dr. Lyss was a community-based medical oncologist and clinical researcher for more than 35 years before his recent retirement. His clinical and research interests were focused on breast and lung cancers, as well as expanding clinical trial access to medically underserved populations. He is based in St. Louis. He has no conflicts of interest.

Research suggests certain gut bacteria can reduce the efficacy of radiotherapy against cancers, but targeting those bacteria with vancomycin can reverse this effect.

Andrea Facciabene, PhD, of the University of Pennsylvania, Philadelphia, and colleagues conducted a preclinical study in which vancomycin enhanced the efficacy of radiotherapy against melanoma and lung cancer. Now, researchers are conducting a clinical trial to determine if vancomycin can have the same effect in patients with non–small cell lung cancer.

Dr. Facciabene reviewed this research at the AACR Virtual Special Conference: Radiation Science and Medicine.

According to Dr. Facciabene, “gut microbiota” includes the more than 1,000 different strains of bacteria living in human intestines. He indicated that the average human has 10 times more bacteria than cells in the body and 150 times more genes in the gut microbiome than in the human genome.

In healthy individuals, the gut microbiota play a key role in intestinal function and digestive processes, modulation of hormones and vitamin secretion, energy extraction from food, and development and maintenance of a balanced immune system.

“Dysbiosis” is the term applied to a change in the composition, diversity, or metabolites of the microbiome from a healthy pattern to one associated with disease. Antibiotic therapy is a classic cause of dysbiosis, and dysbiosis has been implicated in a variety of inflammatory diseases.

The mechanisms by which the gut microbiome could influence systemic immunity is not known but is relevant to cancer therapy response. Augmenting the frequency and durability of response to immune-targeted treatments – potentially by manipulating the influence of gut microbiota on the immune system – could be highly impactful.
 

Gut microbiota and radiation-induced cell death

Immunogenic cell death – a process by which tumors die and release their intracellular molecular contents – is one of the mechanisms by which radiotherapy kills cancer cells.

Tumor cells succumbing to immunogenic cell death stimulate antigen presenting cells, such as dendritic cells, that engulf tumor antigens and cross-present them to CD8+ cytotoxic T lymphocytes. This process culminates in the generation of a specific immune response capable of killing the malignant cells in the irradiated area, but it also impacts distant nonirradiated tumors – an abscopal effect.

Dr. Facciabene and colleagues hypothesized that alterations of the gut microbiota could have an impact on the effect of radiotherapy. To investigate this, they studied mouse models of melanoma.

The team allowed B16-OVA tumors to grow for 9-12 days, then delivered a single dose of radiotherapy (21 Gy) to one – but not all – tumors. Simultaneously with the delivery of radiotherapy, the investigators started some animals on oral vancomycin. The team chose vancomycin because its effects are localized and impact the gut microbiota directly, without any known systemic effects.

Results showed that vancomycin significantly augmented the impact of radiotherapy in the irradiated area and was associated with regression of remote tumors.

The effects of the combination treatment on tumor volume were significantly greater than the effects of either treatment alone. Since manipulation of the gut microbiome potentiated radiotherapy effects both locally and distantly, the investigators concluded that immunogenic cell death may be involved in both the local and abscopal effects of radiotherapy.

When the experiment was repeated with a lung tumor model, similar findings were observed.
 

Involvement of cytotoxic T cells and interferon-gamma

Dr. Facciabene and colleagues found that the irradiated and unirradiated B16 OVA melanoma tumors treated with the radiotherapy-vancomycin combination were infiltrated by CD3+ and CD8+ T cells.

The investigators selectively depleted CD8+ T cells by pretreating the mice with an anti-CD8 monoclonal antibody. Depletion of CD8+ cells prior to administering radiotherapy plus vancomycin abrogated the antitumor effects of the combination treatment, demonstrating that the CD8+ T cells were required.

To characterize the antigen specificity of the tumor-infiltrating CD8+ T cells, Dr. Facciabene and colleagues used OVA MHC class 1 tetramer. Tumors from mice treated with vancomycin alone, radiotherapy alone, or the combination were dissected. Individual dendritic cells were assayed for OVA tetramer by flow cytometry.

The investigators found that tumors from mice treated with radiotherapy plus vancomycin had a significantly higher number of OVA-specific CD8+ T cells, in comparison with untreated tumors or tumors treated with either vancomycin alone or radiotherapy alone. Since antibody that impaired recognition of MHC class I peptides by T cells ablated the effect, it was clear that antigen recognition was vital.

Interferon-gamma (IFN-gamma) is known to play a critical role in both differentiation and effector functions of CD8+ cytolytic T cells in the antitumor immune response. To determine whether IFN-gamma is involved in the antitumor effects of the radiotherapy-vancomycin combination, the investigators measured intratumoral expression of IFN-gamma in the tumors 5 days after radiotherapy.

IFN-gamma messenger RNA expression levels were significantly elevated in the combination treatment group when compared with either treatment alone. In B16-OVA melanoma–challenged knockout mice, the enhancement of the radiotherapy effects by vancomycin was ablated.

The investigators concluded that vancomycin remodels the tumor microenvironment and increases the functionality of tumor-infiltrating, tumor-specific, CD8+ T cells. Furthermore, IFN-gamma is required to augment the radiotherapy-induced immune effect against the tumor.
 

Potential biochemical mediators of immune effects

The gut microbiota aid host digestion and generate a large repertoire of metabolites after defermentation of fiber. Short-chain fatty acids (SCFAs) constitute the major products of bacterial fermentation.

Acetic acid, propionic acid, and butyric acid represent 95% of total SCFAs present in the intestine. SCFAs are known to directly modulate cytokine production and dendritic cell function.

In their study, Dr. Facciabene and colleagues focused on butyric acid. Using mass spectroscopy, they demonstrated that vancomycin treatment reduces butyrate concentrations in tumor and tumor-draining lymph nodes by eradicating the major families of SCFA-producing Clostridia species.

To test whether supplementing butyrate could influence the synergy of the radiotherapy-vancomycin combination in vivo, the investigators added sodium butyrate to the mice’s drinking water when starting vancomycin treatment. The team then challenged the mice with B16-OVA tumors and treated them with radiotherapy.

In agreement with the group’s prior findings, vancomycin enhanced the tumor-inhibitory effects of radiotherapy, but dietary butyrate inhibited the benefit. The investigators found a significant decrease in the population of B16-OVA–presenting dendritic cells in the lymph nodes of mice receiving the supplemental butyrate.

Dr. Facciabene said these findings were supported by a recent publication. The authors observed that butyrate inhibited type I IFN expression in dendritic cells and radiotherapy-induced, tumor-specific cytotoxic T-cell immune responses without directly protecting tumor cells from the cytotoxic effects of radiotherapy.
 

Wide-ranging implications

Overall, Dr. Facciabene’s research has shown that:

• Vancomycin significantly enhances the tumor inhibitory effect of targeted radiation, including abscopal effects.
• The synergistic effects are dependent upon IFN-gamma and CD8+ cells.
• Depletion of some gut microbiome species increases antigen presentation by dendritic cells. This is mediated by SCFAs produced by certain bacterial families.
• There are promising new strategies to improve responses to radiotherapy, including targeting gut microbiota.

A clinical trial (NCT03546829) of vancomycin plus stereotactic body radiation in patients with locally advanced non–small cell lung cancer has been launched to investigate these findings further. Early data analysis has shown a significant impact of vancomycin on several species of gut microbiota, according to Dr. Facciabene.

Revolutionary results from immune-targeted therapy in the recent past have highlighted the important role the immune system can play in fighting cancer. Still, up to one-third of cancer patients fail to respond to overtly immune-targeted therapy.

The ability to inhibit cancer cells from evading immune surveillance by using new adjuvants – including those acting on non-traditional targets like gut microbiota – could herald the next major advances in cancer therapy. During his presentation, Dr. Facciabene gave participants an enticing hint of what could be coming for cancer patients in the years ahead.

Dr. Facciabene reported having no relevant disclosures.

Dr. Lyss was a community-based medical oncologist and clinical researcher for more than 35 years before his recent retirement. His clinical and research interests were focused on breast and lung cancers, as well as expanding clinical trial access to medically underserved populations. He is based in St. Louis. He has no conflicts of interest.

Black and Hispanic patients had higher inpatient care utilization for mycosis fungoides (MF) – and were admitted at a younger age – compared with White patients, according to an analysis of the 2012-2017 National Inpatient Sample (NIS).

The findings are consistent with prior studies implicating earlier and more severe disease in Black and Hispanic patients, and reinforce the importance of accurate diagnosis and early treatment.

Dermatologists should maintain “a higher index of suspicion for MF in patients with skin of color, as early diagnosis may help mitigate the downstream costs of management,” Justin Choi, BA, a medical student at the University of Illinois at Chicago, said at the annual Skin of Color Society symposium.

Mr. Choi and coinvestigators, led by Shawn Kwatra, MD, of Johns Hopkins University, Baltimore, identified hospital admissions for MF in the NIS for 10,790 White patients, 4,020 Black patients, and 1,615 Hispanic patients over the 5-year period. The inpatient prevalence of MF – the most common variant of primary cutaneous T-cell lymphoma – was highest in these groups.

Black and Hispanic patients who were hospitalized for MF were significantly younger than White patients, with a mean age of 51.7 years and 48.5 years, respectively, compared with 59.9 years (P < .001 in each case). They also had longer lengths of stay: 8.34 days on average for Black patients and 8.88 for Hispanic patients, compared with 6.66 days for White patients (P < .001 and P = .001, respectively).

Hispanic patients accrued the highest costs of care (a mean of $107,242 vs. $64,049, P =.003) and underwent more procedures (a mean of 2.43 vs. 1.93, P = .004) than White patients. Black patients similarly had higher costs associated with their hospital stay (a mean of $75,053 vs. $64,049, P =.042).

In a multivariate linear regression adjusted for age, sex and insurance type, Black race remained significantly associated with a longer LOS than White race, and Hispanic ethnicity with a longer LOS, increased costs, and more procedures than White race.

The NIS is a publicly available, all-payer inpatient care database developed for the Agency for Healthcare Research and Quality’s Healthcare Cost and Utilization Project.

Mr. Choi is a dermatology research fellow working under the guidance of Dr. Kwatra.

Black and Hispanic patients had higher inpatient care utilization for mycosis fungoides (MF) – and were admitted at a younger age – compared with White patients, according to an analysis of the 2012-2017 National Inpatient Sample (NIS).

The findings are consistent with prior studies implicating earlier and more severe disease in Black and Hispanic patients, and reinforce the importance of accurate diagnosis and early treatment.

Dermatologists should maintain “a higher index of suspicion for MF in patients with skin of color, as early diagnosis may help mitigate the downstream costs of management,” Justin Choi, BA, a medical student at the University of Illinois at Chicago, said at the annual Skin of Color Society symposium.

Mr. Choi and coinvestigators, led by Shawn Kwatra, MD, of Johns Hopkins University, Baltimore, identified hospital admissions for MF in the NIS for 10,790 White patients, 4,020 Black patients, and 1,615 Hispanic patients over the 5-year period. The inpatient prevalence of MF – the most common variant of primary cutaneous T-cell lymphoma – was highest in these groups.

Black and Hispanic patients who were hospitalized for MF were significantly younger than White patients, with a mean age of 51.7 years and 48.5 years, respectively, compared with 59.9 years (P < .001 in each case). They also had longer lengths of stay: 8.34 days on average for Black patients and 8.88 for Hispanic patients, compared with 6.66 days for White patients (P < .001 and P = .001, respectively).

Hispanic patients accrued the highest costs of care (a mean of $107,242 vs. $64,049, P =.003) and underwent more procedures (a mean of 2.43 vs. 1.93, P = .004) than White patients. Black patients similarly had higher costs associated with their hospital stay (a mean of $75,053 vs. $64,049, P =.042).

In a multivariate linear regression adjusted for age, sex and insurance type, Black race remained significantly associated with a longer LOS than White race, and Hispanic ethnicity with a longer LOS, increased costs, and more procedures than White race.

The NIS is a publicly available, all-payer inpatient care database developed for the Agency for Healthcare Research and Quality’s Healthcare Cost and Utilization Project.

Mr. Choi is a dermatology research fellow working under the guidance of Dr. Kwatra.

Black and Hispanic patients had higher inpatient care utilization for mycosis fungoides (MF) – and were admitted at a younger age – compared with White patients, according to an analysis of the 2012-2017 National Inpatient Sample (NIS).

The findings are consistent with prior studies implicating earlier and more severe disease in Black and Hispanic patients, and reinforce the importance of accurate diagnosis and early treatment.

Dermatologists should maintain “a higher index of suspicion for MF in patients with skin of color, as early diagnosis may help mitigate the downstream costs of management,” Justin Choi, BA, a medical student at the University of Illinois at Chicago, said at the annual Skin of Color Society symposium.

Mr. Choi and coinvestigators, led by Shawn Kwatra, MD, of Johns Hopkins University, Baltimore, identified hospital admissions for MF in the NIS for 10,790 White patients, 4,020 Black patients, and 1,615 Hispanic patients over the 5-year period. The inpatient prevalence of MF – the most common variant of primary cutaneous T-cell lymphoma – was highest in these groups.

Black and Hispanic patients who were hospitalized for MF were significantly younger than White patients, with a mean age of 51.7 years and 48.5 years, respectively, compared with 59.9 years (P < .001 in each case). They also had longer lengths of stay: 8.34 days on average for Black patients and 8.88 for Hispanic patients, compared with 6.66 days for White patients (P < .001 and P = .001, respectively).

Hispanic patients accrued the highest costs of care (a mean of $107,242 vs. $64,049, P =.003) and underwent more procedures (a mean of 2.43 vs. 1.93, P = .004) than White patients. Black patients similarly had higher costs associated with their hospital stay (a mean of $75,053 vs. $64,049, P =.042).

In a multivariate linear regression adjusted for age, sex and insurance type, Black race remained significantly associated with a longer LOS than White race, and Hispanic ethnicity with a longer LOS, increased costs, and more procedures than White race.

The NIS is a publicly available, all-payer inpatient care database developed for the Agency for Healthcare Research and Quality’s Healthcare Cost and Utilization Project.

Mr. Choi is a dermatology research fellow working under the guidance of Dr. Kwatra.

Clinicians should be on the lookout for immune-related adverse events (irAEs) even after patients have been receiving anti-PD-1 immunotherapy for a year or longer, according to team of international investigators.

They reported that, among melanoma patients, the incidence of new-onset reactions that occurred 1 year or longer after anti-PD-1 treatment was 5.3%.

In a review of 118 patients, the investigators found that irAEs are often “high grade, difficult to manage, and can lead to death.”

Reactions are more likely to occur in those for whom treatment with an anti-PD-1 checkpoint inhibitor – primarily pembrolizumab and nivolumab – continued for longer than a year, and patients can present “long after stopping” the treatment, the investigators noted.

The findings were published online in Annals of Oncology.

“We do not yet understand why some patients have no side effects for months or years, then develop toxicities so late in their course,” said one of the coauthors, Douglas Johnson, MD, assistant professor of hematology/oncology at Vanderbilt University, Nashville, Tenn.

“Physicians should continue to monitor patients for side effects, even if they have been on anti-PD-1 therapy for some time, since delayed side effects may cause morbidity and even death,” Dr. Johnson said.

Patients and clinicians need “to be aware of these risks when making decisions regarding therapy continuation” and need “to consider irAE as a possible diagnosis in any presentation where there is a history of checkpoint inhibitor treatment, regardless of the time frame, to enable early recognition and appropriate treatment,” Dr. Johnson and colleagues concluded.
 

Largest series to document delayed reactions

Immunotherapies have revolutionized cancer treatment of many types of tumors, but they carry a well known risk for autoimmune toxicity, which typically occurs within the first 4-6 months, the authors wrote.

Delayed reactions have been reported but are not as well described. The new study is the largest to date on this question, and Dr. Johnson said the findings likely apply across indications, not simply in regard to melanoma patients.

An expert not involved in the study agrees.

“We are definitely seeing delayed reactions to immunotherapy in our practice” in several organ systems, including the skin, said Jennifer Choi, MD, chief of oncodermatology at Northwestern University’s Comprehensive Cancer Center, Chicago.

“Some of these side effects can take months to resolve and may require systemic treatment, such as steroids, nonsteroidal immunosuppressants, or biologics. Clinicians must be on high alert of any possible side effect for a patient on immunotherapy throughout their entire course, and even after they have completed treatment,” Dr. Choi said in an interview.

Anti-PD-1 therapy doesn’t “follow the typical drug hypersensitivity laws and rules with respect to timing,” said Adam Friedman, MD, professor and chair of dermatology at George Washington University, Washington.
 

Median onset was 16 months

The investigators reported in detail on 118 patients. A total of 140 delayed irAEs that occurred 1 year or longer after treatment were identified in 20 centers around the world.

The median onset of delayed irAE was 16 months after start of treatment. Most occurred in conjunction with stand-alone anti-PD-1 therapy, but in the case of 20 patients, a combination of an anti-PD-1 drug and the anti-CTLA-4 drug ipilimumab was used.

In 39% of patients (n = 55), the adverse reaction was of grade 3 or worse. These included two deaths: one case of fatal encephalitis with concurrent anti-PD-1 use, and a death from immune-related multiple organ failure 11 months after anti-PD-1 discontinuation.

Most of the patients (n = 87; 74%) were receiving anti-PD-1 therapy at the time of onset of the adverse reaction; 15 patients (12%) were within 3 months of their last dose, and 16 (14%) were 3 months past their last dose.

Among the subgroup who developed an irAE after discontinuation of treatment was a patient with grade 4 colitis that required colectomy 26 months afterward, although Dr. Johnson noted it’s difficult to be sure that the colitis was related to the immunotherapy, because it occurred so long after treatment had ended.
 

An early warning system

The most common reactions were colitis, pneumonitis, and rash.

The reactions were often tough to manage, the authors reported. Eighty patients (68%) required steroids, and 27 (23%) required steroids plus additional immunosuppressives, such as tumor necrosis factor blockers, particularly for colitis and renal, rheumatologic, and neurologic complications. Rheumatologic events required a median corticosteroid course of 15 months plus additional immunosuppression in half of cases and often left patients with ongoing morbidity.

“Often, the skin is one of the first and most easily visible immune-related adverse event that develops,” said Bernice Kwong, MD, director of the supportive dermato-oncology program at Stanford (Calif.) University, who was not involved in the study and was approached for comment.

Presentations can range from small itchy plaques to total body dermatitis. It is something to be aware of, because the skin can act as an early warning system to catch internal organ damage earlier, she said.

On a positive note, the investigators found no indication that the effect of immunotherapy was diminished by delayed reactions and their treatment.

Managing events “gets a little complicated” when anti-PD-1 drugs are still being administered, but “we have successfully utilized systemic steroid pulses for several weeks without impeding the efficacy of the therapy. For the lichenoid and psoriasiform dermatitis, topical steroids and oral retinoids have been useful and can be used concurrently with immunotherapy,” Dr. Friedman said.
 

Question on treatment duration

No obvious factors were predictive of delayed events, including previous autoimmune disease or earlier reactions, which usually affected different organs, the authors said.

The findings raise a question about the appropriate duration of anti-PD-1 therapy, at least for melanoma.

The standard duration of adjuvant therapy was empirically determined to be 1 year for melanoma, and trials support anti-PD-1 therapy for up to 2 years for metastatic disease.

However, the authors suggest that “shorter treatment duration may reduce the risk of delayed irAE” and may be sufficient for patients who have a complete response.

“This should be considered when making decisions regarding therapy continuation in responding patients,” they wrote.

Ongoing clinical trials are investigating the optimal duration of therapy, they wrote.

No outside funding was reported. Dr. Johnson has been an adviser for Array Biopharma, BMS, Iovance, Jansen, Merck, and Novartis and has received research funding from BMS and Incyte. Other investigators reported similar ties. Dr. Choi, Dr. Kwong, and Dr. Friedman have disclosed no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Clinicians should be on the lookout for immune-related adverse events (irAEs) even after patients have been receiving anti-PD-1 immunotherapy for a year or longer, according to team of international investigators.

They reported that, among melanoma patients, the incidence of new-onset reactions that occurred 1 year or longer after anti-PD-1 treatment was 5.3%.

In a review of 118 patients, the investigators found that irAEs are often “high grade, difficult to manage, and can lead to death.”

Reactions are more likely to occur in those for whom treatment with an anti-PD-1 checkpoint inhibitor – primarily pembrolizumab and nivolumab – continued for longer than a year, and patients can present “long after stopping” the treatment, the investigators noted.

The findings were published online in Annals of Oncology.

“We do not yet understand why some patients have no side effects for months or years, then develop toxicities so late in their course,” said one of the coauthors, Douglas Johnson, MD, assistant professor of hematology/oncology at Vanderbilt University, Nashville, Tenn.

“Physicians should continue to monitor patients for side effects, even if they have been on anti-PD-1 therapy for some time, since delayed side effects may cause morbidity and even death,” Dr. Johnson said.

Patients and clinicians need “to be aware of these risks when making decisions regarding therapy continuation” and need “to consider irAE as a possible diagnosis in any presentation where there is a history of checkpoint inhibitor treatment, regardless of the time frame, to enable early recognition and appropriate treatment,” Dr. Johnson and colleagues concluded.
 

Largest series to document delayed reactions

Immunotherapies have revolutionized cancer treatment of many types of tumors, but they carry a well known risk for autoimmune toxicity, which typically occurs within the first 4-6 months, the authors wrote.

Delayed reactions have been reported but are not as well described. The new study is the largest to date on this question, and Dr. Johnson said the findings likely apply across indications, not simply in regard to melanoma patients.

An expert not involved in the study agrees.

“We are definitely seeing delayed reactions to immunotherapy in our practice” in several organ systems, including the skin, said Jennifer Choi, MD, chief of oncodermatology at Northwestern University’s Comprehensive Cancer Center, Chicago.

“Some of these side effects can take months to resolve and may require systemic treatment, such as steroids, nonsteroidal immunosuppressants, or biologics. Clinicians must be on high alert of any possible side effect for a patient on immunotherapy throughout their entire course, and even after they have completed treatment,” Dr. Choi said in an interview.

Anti-PD-1 therapy doesn’t “follow the typical drug hypersensitivity laws and rules with respect to timing,” said Adam Friedman, MD, professor and chair of dermatology at George Washington University, Washington.
 

Median onset was 16 months

The investigators reported in detail on 118 patients. A total of 140 delayed irAEs that occurred 1 year or longer after treatment were identified in 20 centers around the world.

The median onset of delayed irAE was 16 months after start of treatment. Most occurred in conjunction with stand-alone anti-PD-1 therapy, but in the case of 20 patients, a combination of an anti-PD-1 drug and the anti-CTLA-4 drug ipilimumab was used.

In 39% of patients (n = 55), the adverse reaction was of grade 3 or worse. These included two deaths: one case of fatal encephalitis with concurrent anti-PD-1 use, and a death from immune-related multiple organ failure 11 months after anti-PD-1 discontinuation.

Most of the patients (n = 87; 74%) were receiving anti-PD-1 therapy at the time of onset of the adverse reaction; 15 patients (12%) were within 3 months of their last dose, and 16 (14%) were 3 months past their last dose.

Among the subgroup who developed an irAE after discontinuation of treatment was a patient with grade 4 colitis that required colectomy 26 months afterward, although Dr. Johnson noted it’s difficult to be sure that the colitis was related to the immunotherapy, because it occurred so long after treatment had ended.
 

An early warning system

The most common reactions were colitis, pneumonitis, and rash.

The reactions were often tough to manage, the authors reported. Eighty patients (68%) required steroids, and 27 (23%) required steroids plus additional immunosuppressives, such as tumor necrosis factor blockers, particularly for colitis and renal, rheumatologic, and neurologic complications. Rheumatologic events required a median corticosteroid course of 15 months plus additional immunosuppression in half of cases and often left patients with ongoing morbidity.

“Often, the skin is one of the first and most easily visible immune-related adverse event that develops,” said Bernice Kwong, MD, director of the supportive dermato-oncology program at Stanford (Calif.) University, who was not involved in the study and was approached for comment.

Presentations can range from small itchy plaques to total body dermatitis. It is something to be aware of, because the skin can act as an early warning system to catch internal organ damage earlier, she said.

On a positive note, the investigators found no indication that the effect of immunotherapy was diminished by delayed reactions and their treatment.

Managing events “gets a little complicated” when anti-PD-1 drugs are still being administered, but “we have successfully utilized systemic steroid pulses for several weeks without impeding the efficacy of the therapy. For the lichenoid and psoriasiform dermatitis, topical steroids and oral retinoids have been useful and can be used concurrently with immunotherapy,” Dr. Friedman said.
 

Question on treatment duration

No obvious factors were predictive of delayed events, including previous autoimmune disease or earlier reactions, which usually affected different organs, the authors said.

The findings raise a question about the appropriate duration of anti-PD-1 therapy, at least for melanoma.

The standard duration of adjuvant therapy was empirically determined to be 1 year for melanoma, and trials support anti-PD-1 therapy for up to 2 years for metastatic disease.

However, the authors suggest that “shorter treatment duration may reduce the risk of delayed irAE” and may be sufficient for patients who have a complete response.

“This should be considered when making decisions regarding therapy continuation in responding patients,” they wrote.

Ongoing clinical trials are investigating the optimal duration of therapy, they wrote.

No outside funding was reported. Dr. Johnson has been an adviser for Array Biopharma, BMS, Iovance, Jansen, Merck, and Novartis and has received research funding from BMS and Incyte. Other investigators reported similar ties. Dr. Choi, Dr. Kwong, and Dr. Friedman have disclosed no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Clinicians should be on the lookout for immune-related adverse events (irAEs) even after patients have been receiving anti-PD-1 immunotherapy for a year or longer, according to team of international investigators.

They reported that, among melanoma patients, the incidence of new-onset reactions that occurred 1 year or longer after anti-PD-1 treatment was 5.3%.

In a review of 118 patients, the investigators found that irAEs are often “high grade, difficult to manage, and can lead to death.”

Reactions are more likely to occur in those for whom treatment with an anti-PD-1 checkpoint inhibitor – primarily pembrolizumab and nivolumab – continued for longer than a year, and patients can present “long after stopping” the treatment, the investigators noted.

The findings were published online in Annals of Oncology.

“We do not yet understand why some patients have no side effects for months or years, then develop toxicities so late in their course,” said one of the coauthors, Douglas Johnson, MD, assistant professor of hematology/oncology at Vanderbilt University, Nashville, Tenn.

“Physicians should continue to monitor patients for side effects, even if they have been on anti-PD-1 therapy for some time, since delayed side effects may cause morbidity and even death,” Dr. Johnson said.

Patients and clinicians need “to be aware of these risks when making decisions regarding therapy continuation” and need “to consider irAE as a possible diagnosis in any presentation where there is a history of checkpoint inhibitor treatment, regardless of the time frame, to enable early recognition and appropriate treatment,” Dr. Johnson and colleagues concluded.
 

Largest series to document delayed reactions

Immunotherapies have revolutionized cancer treatment of many types of tumors, but they carry a well known risk for autoimmune toxicity, which typically occurs within the first 4-6 months, the authors wrote.

Delayed reactions have been reported but are not as well described. The new study is the largest to date on this question, and Dr. Johnson said the findings likely apply across indications, not simply in regard to melanoma patients.

An expert not involved in the study agrees.

“We are definitely seeing delayed reactions to immunotherapy in our practice” in several organ systems, including the skin, said Jennifer Choi, MD, chief of oncodermatology at Northwestern University’s Comprehensive Cancer Center, Chicago.

“Some of these side effects can take months to resolve and may require systemic treatment, such as steroids, nonsteroidal immunosuppressants, or biologics. Clinicians must be on high alert of any possible side effect for a patient on immunotherapy throughout their entire course, and even after they have completed treatment,” Dr. Choi said in an interview.

Anti-PD-1 therapy doesn’t “follow the typical drug hypersensitivity laws and rules with respect to timing,” said Adam Friedman, MD, professor and chair of dermatology at George Washington University, Washington.
 

Median onset was 16 months

The investigators reported in detail on 118 patients. A total of 140 delayed irAEs that occurred 1 year or longer after treatment were identified in 20 centers around the world.

The median onset of delayed irAE was 16 months after start of treatment. Most occurred in conjunction with stand-alone anti-PD-1 therapy, but in the case of 20 patients, a combination of an anti-PD-1 drug and the anti-CTLA-4 drug ipilimumab was used.

In 39% of patients (n = 55), the adverse reaction was of grade 3 or worse. These included two deaths: one case of fatal encephalitis with concurrent anti-PD-1 use, and a death from immune-related multiple organ failure 11 months after anti-PD-1 discontinuation.

Most of the patients (n = 87; 74%) were receiving anti-PD-1 therapy at the time of onset of the adverse reaction; 15 patients (12%) were within 3 months of their last dose, and 16 (14%) were 3 months past their last dose.

Among the subgroup who developed an irAE after discontinuation of treatment was a patient with grade 4 colitis that required colectomy 26 months afterward, although Dr. Johnson noted it’s difficult to be sure that the colitis was related to the immunotherapy, because it occurred so long after treatment had ended.
 

An early warning system

The most common reactions were colitis, pneumonitis, and rash.

The reactions were often tough to manage, the authors reported. Eighty patients (68%) required steroids, and 27 (23%) required steroids plus additional immunosuppressives, such as tumor necrosis factor blockers, particularly for colitis and renal, rheumatologic, and neurologic complications. Rheumatologic events required a median corticosteroid course of 15 months plus additional immunosuppression in half of cases and often left patients with ongoing morbidity.

“Often, the skin is one of the first and most easily visible immune-related adverse event that develops,” said Bernice Kwong, MD, director of the supportive dermato-oncology program at Stanford (Calif.) University, who was not involved in the study and was approached for comment.

Presentations can range from small itchy plaques to total body dermatitis. It is something to be aware of, because the skin can act as an early warning system to catch internal organ damage earlier, she said.

On a positive note, the investigators found no indication that the effect of immunotherapy was diminished by delayed reactions and their treatment.

Managing events “gets a little complicated” when anti-PD-1 drugs are still being administered, but “we have successfully utilized systemic steroid pulses for several weeks without impeding the efficacy of the therapy. For the lichenoid and psoriasiform dermatitis, topical steroids and oral retinoids have been useful and can be used concurrently with immunotherapy,” Dr. Friedman said.
 

Question on treatment duration

No obvious factors were predictive of delayed events, including previous autoimmune disease or earlier reactions, which usually affected different organs, the authors said.

The findings raise a question about the appropriate duration of anti-PD-1 therapy, at least for melanoma.

The standard duration of adjuvant therapy was empirically determined to be 1 year for melanoma, and trials support anti-PD-1 therapy for up to 2 years for metastatic disease.

However, the authors suggest that “shorter treatment duration may reduce the risk of delayed irAE” and may be sufficient for patients who have a complete response.

“This should be considered when making decisions regarding therapy continuation in responding patients,” they wrote.

Ongoing clinical trials are investigating the optimal duration of therapy, they wrote.

No outside funding was reported. Dr. Johnson has been an adviser for Array Biopharma, BMS, Iovance, Jansen, Merck, and Novartis and has received research funding from BMS and Incyte. Other investigators reported similar ties. Dr. Choi, Dr. Kwong, and Dr. Friedman have disclosed no relevant financial relationships.

A version of this article first appeared on Medscape.com.

COVID vaccines do not work well for patients with hematologic malignancies, new data suggest.

A small study involving 67 such patients shows that nearly half did not produce antibodies and were therefore still at risk of contracting COVID-19, even though they had all received both doses of one of the new mRNA COVID vaccines (Moderna or Pfizer).

“[This] is in stark contrast with the results of phase 1 mRNA vaccine immunogenicity trials, in which robust antibody responses were seen in essentially 100% of participants,” said the authors, led by Mounzer Agha, MD, director of the Mario Lemieux Center for Blood Cancers at the University of Pittsburgh Medical Center’s Hillman Cancer Center.

“Clinicians caring for patients with hematological malignancies and other immunocompromising conditions should be aware of the possibility of COVID-19 vaccine failure,” they emphasized.

“It’s critically important for these patients to be aware of their continued risk [for SARS-CoV-2 infection] and to seek prompt medical attention if they have COVID-19 symptoms, even after vaccination,” Dr. Agha said in a statement.

The study was published online on April 9 as preprint in medRxiv and has not yet undergone peer review.


 

Antibody responses

The authors analyzed responses in a group of 67 patients who had a hematologic malignancy, including chronic lymphocytic leukemia (CLL), lymphoma, and multiple myeloma. Approximately 45% of the patients were receiving therapy for their cancer at the time of vaccination; the rest were under observation.

All patients received two doses of an mRNA COVID vaccine and so were considered to be fully vaccinated.

Antibody responses for these fully vaccinated patients were then analyzed. The median duration between receipt of the second dose of the vaccine and the antibody test was 23 days.

“In total ... 46.3% ... had a negative antibody result after vaccination and were therefore considered to be vaccine nonresponders,” the authors reported.

The worst responses occurred in patients with CLL, of whom only 23% produced measurable antibodies to either vaccine, although approximately 70% of these patients were not receiving any form of cancer therapy at the time of vaccination.

Older patients were more likely not to have a response to either vaccine compared with younger patients, the investigators added.

In contrast, gender, immunoglobulin G levels, the number of days between the second dose and the measurement of antibodies, and status of cancer therapy did not differ among patients who had a response to the vaccines and those who did not.

“Our findings underscore the importance of adherence to nonpharmaceutical interventions to prevent COVID-19 in hematological malignancy patients,” the authors wrote. This is particularly important, given the fact that among patients with hematologic malignancies who become infected with SARS-CoV-2, the mortality rate is in excess of 30%.

Moreover, among such patients, viral shedding may be prolonged, often lasting several months. As such, “these patients should be advised to wear masks and observe social distancing regardless of vaccination status,” the investigators advised.

As of March 2021, guidance from the Centers for Disease Control and Prevention has allowed gatherings of unmasked people who have been vaccinated and of those at low risk for COVID-19 who have not yet been vaccinated. “As we see more national guidance allowing for unmasked gatherings among vaccinated people, clinicians should counsel their immunocompromised patients about the possibility that COVID-19 vaccines may not fully protect them against SARS-CoV-2,” coauthor Ghady Haidar, MD, assistant professor of medicine at the University of Pittsburgh, said in a statement.

“Our results show that the odds of the vaccine producing an antibody response in people with hematologic malignancies are the equivalent of a coin flip,” he said.

The authors have disclosed no relevant financial relationships.
 

A version of this article first appeared on Medscape.com.

COVID vaccines do not work well for patients with hematologic malignancies, new data suggest.

A small study involving 67 such patients shows that nearly half did not produce antibodies and were therefore still at risk of contracting COVID-19, even though they had all received both doses of one of the new mRNA COVID vaccines (Moderna or Pfizer).

“[This] is in stark contrast with the results of phase 1 mRNA vaccine immunogenicity trials, in which robust antibody responses were seen in essentially 100% of participants,” said the authors, led by Mounzer Agha, MD, director of the Mario Lemieux Center for Blood Cancers at the University of Pittsburgh Medical Center’s Hillman Cancer Center.

“Clinicians caring for patients with hematological malignancies and other immunocompromising conditions should be aware of the possibility of COVID-19 vaccine failure,” they emphasized.

“It’s critically important for these patients to be aware of their continued risk [for SARS-CoV-2 infection] and to seek prompt medical attention if they have COVID-19 symptoms, even after vaccination,” Dr. Agha said in a statement.

The study was published online on April 9 as preprint in medRxiv and has not yet undergone peer review.


 

Antibody responses

The authors analyzed responses in a group of 67 patients who had a hematologic malignancy, including chronic lymphocytic leukemia (CLL), lymphoma, and multiple myeloma. Approximately 45% of the patients were receiving therapy for their cancer at the time of vaccination; the rest were under observation.

All patients received two doses of an mRNA COVID vaccine and so were considered to be fully vaccinated.

Antibody responses for these fully vaccinated patients were then analyzed. The median duration between receipt of the second dose of the vaccine and the antibody test was 23 days.

“In total ... 46.3% ... had a negative antibody result after vaccination and were therefore considered to be vaccine nonresponders,” the authors reported.

The worst responses occurred in patients with CLL, of whom only 23% produced measurable antibodies to either vaccine, although approximately 70% of these patients were not receiving any form of cancer therapy at the time of vaccination.

Older patients were more likely not to have a response to either vaccine compared with younger patients, the investigators added.

In contrast, gender, immunoglobulin G levels, the number of days between the second dose and the measurement of antibodies, and status of cancer therapy did not differ among patients who had a response to the vaccines and those who did not.

“Our findings underscore the importance of adherence to nonpharmaceutical interventions to prevent COVID-19 in hematological malignancy patients,” the authors wrote. This is particularly important, given the fact that among patients with hematologic malignancies who become infected with SARS-CoV-2, the mortality rate is in excess of 30%.

Moreover, among such patients, viral shedding may be prolonged, often lasting several months. As such, “these patients should be advised to wear masks and observe social distancing regardless of vaccination status,” the investigators advised.

As of March 2021, guidance from the Centers for Disease Control and Prevention has allowed gatherings of unmasked people who have been vaccinated and of those at low risk for COVID-19 who have not yet been vaccinated. “As we see more national guidance allowing for unmasked gatherings among vaccinated people, clinicians should counsel their immunocompromised patients about the possibility that COVID-19 vaccines may not fully protect them against SARS-CoV-2,” coauthor Ghady Haidar, MD, assistant professor of medicine at the University of Pittsburgh, said in a statement.

“Our results show that the odds of the vaccine producing an antibody response in people with hematologic malignancies are the equivalent of a coin flip,” he said.

The authors have disclosed no relevant financial relationships.
 

A version of this article first appeared on Medscape.com.

COVID vaccines do not work well for patients with hematologic malignancies, new data suggest.

A small study involving 67 such patients shows that nearly half did not produce antibodies and were therefore still at risk of contracting COVID-19, even though they had all received both doses of one of the new mRNA COVID vaccines (Moderna or Pfizer).

“[This] is in stark contrast with the results of phase 1 mRNA vaccine immunogenicity trials, in which robust antibody responses were seen in essentially 100% of participants,” said the authors, led by Mounzer Agha, MD, director of the Mario Lemieux Center for Blood Cancers at the University of Pittsburgh Medical Center’s Hillman Cancer Center.

“Clinicians caring for patients with hematological malignancies and other immunocompromising conditions should be aware of the possibility of COVID-19 vaccine failure,” they emphasized.

“It’s critically important for these patients to be aware of their continued risk [for SARS-CoV-2 infection] and to seek prompt medical attention if they have COVID-19 symptoms, even after vaccination,” Dr. Agha said in a statement.

The study was published online on April 9 as preprint in medRxiv and has not yet undergone peer review.


 

Antibody responses

The authors analyzed responses in a group of 67 patients who had a hematologic malignancy, including chronic lymphocytic leukemia (CLL), lymphoma, and multiple myeloma. Approximately 45% of the patients were receiving therapy for their cancer at the time of vaccination; the rest were under observation.

All patients received two doses of an mRNA COVID vaccine and so were considered to be fully vaccinated.

Antibody responses for these fully vaccinated patients were then analyzed. The median duration between receipt of the second dose of the vaccine and the antibody test was 23 days.

“In total ... 46.3% ... had a negative antibody result after vaccination and were therefore considered to be vaccine nonresponders,” the authors reported.

The worst responses occurred in patients with CLL, of whom only 23% produced measurable antibodies to either vaccine, although approximately 70% of these patients were not receiving any form of cancer therapy at the time of vaccination.

Older patients were more likely not to have a response to either vaccine compared with younger patients, the investigators added.

In contrast, gender, immunoglobulin G levels, the number of days between the second dose and the measurement of antibodies, and status of cancer therapy did not differ among patients who had a response to the vaccines and those who did not.

“Our findings underscore the importance of adherence to nonpharmaceutical interventions to prevent COVID-19 in hematological malignancy patients,” the authors wrote. This is particularly important, given the fact that among patients with hematologic malignancies who become infected with SARS-CoV-2, the mortality rate is in excess of 30%.

Moreover, among such patients, viral shedding may be prolonged, often lasting several months. As such, “these patients should be advised to wear masks and observe social distancing regardless of vaccination status,” the investigators advised.

As of March 2021, guidance from the Centers for Disease Control and Prevention has allowed gatherings of unmasked people who have been vaccinated and of those at low risk for COVID-19 who have not yet been vaccinated. “As we see more national guidance allowing for unmasked gatherings among vaccinated people, clinicians should counsel their immunocompromised patients about the possibility that COVID-19 vaccines may not fully protect them against SARS-CoV-2,” coauthor Ghady Haidar, MD, assistant professor of medicine at the University of Pittsburgh, said in a statement.

“Our results show that the odds of the vaccine producing an antibody response in people with hematologic malignancies are the equivalent of a coin flip,” he said.

The authors have disclosed no relevant financial relationships.
 

A version of this article first appeared on Medscape.com.

A personalized genomic cancer vaccine proved feasible to manufacture and was well tolerated in a phase 1 trial, according to researchers.

The vaccine, PGV-001, was given to 13 patients with solid tumors or multiple myeloma who had a high risk of recurrence after surgery or autologous stem cell transplant.

At last follow-up, four patients were still alive without evidence of disease and had not received subsequent therapy, four were alive and receiving therapy, three had died, and two were lost to follow-up.

Thomas Marron, MD, PhD , of Mount Sinai in New York presented these results in a poster at the American Association for Cancer Research Annual Meeting 2021: Week 1 ( Abstract LB048 ). Data in the abstract differ from the data presented.

“While cancer immunotherapy has revolutionized the treatment of cancer, we know that the majority of patients fail to achieve significant clinical response,” Dr. Marron said during his presentation. “One reason for this may be due to lack of preexisting primed T-cell response needed for PD-1 blockade to have a significant effect. To address this, personalized neoantigen vaccines may help prime an improved immune response against tumor cells.”

With this in mind, Dr. Marron and colleagues developed PGV-001, a vaccine consisting of patient-specific synthetic neoantigen peptides given to patients in the adjuvant setting.
 

Creating a personalized vaccine

The researchers synthesized PGV-001 for 15 patients with advanced malignancies. The patients first underwent tumor and germline DNA sequencing as well as HLA typing. Bulk RNA sequencing was performed on patients’ tumors as well.

Then, the researchers used a computational pipeline called OpenVax to identify candidate neoantigens. This pipeline, developed at Mount Sinai, identified and prioritized candidate neoantigens using predicted MHC class I binding affinity and neoantigen abundance.

OpenVax identified an average of 71.5 neoantigens per patient (range, 7-193). The goal was to synthesize a maximum of 10 peptides per patient, but two patients did not have an adequate number of neoantigens.
 

Vaccine administration

The peptides were administered over the course of 27 weeks along with poly-ICLC and a tetanus helper peptide. Before receiving their vaccine doses, patients with solid tumors had undergone curative-intent surgery, and those with multiple myeloma had undergone autologous stem cell transplant.

“Most experimental personalized cancer vaccines are administered in the metastatic setting, but prior research indicates that immunotherapies tend to be more effective in patients who have less cancer spread,” principal investigator Nina Bhardwaj, MD, PhD , of Mount Sinai, explained in a press release .

“We have, therefore, developed a neoantigen vaccine that is administered after standard-of-care adjuvant therapy, such as surgery in solid tumors and bone marrow transplant in multiple myeloma, when patients have minimal, typically microscopic, residual disease.”
 

Feasibility, safety, and immunogenicity

PGV-001 was synthesized for 15 patients and administered to 13 of them. Six of the 13 patients had head and neck squamous cell carcinoma, three had multiple myeloma, two had non–small cell lung cancer, one had breast cancer, and one had urothelial carcinoma.

Eleven patients received all 10 intended doses, and two patients received at least 8 doses.

“The vaccine was well tolerated, with only half of patients experiencing mild, grade 1 adverse events,” Dr. Marron said.

Transient injection site reactions occurred in four patients, and grade 1 fever was reported in one patient.

Immune monitoring is ongoing, but an initial analysis in one patient showed “robust responses” in CD4 and CD8 T cells by intracellular cytokine staining for interferon-gamma, tumor necrosis factor–alpha, and interleukin-2 after in vitro expansion in the presence of vaccine antigens, according to the researchers.

Dr. Marron noted that robust T-cell reactivity was seen at the completion of all 10 doses but was not seen after the 6th dose, and this supports the need for a prolonged dosing schedule.
 

Survival and subsequent therapy

At a mean follow-up of 880 days, four patients had no evidence of disease and had not received subsequent therapy. This includes one patient with stage IIIA non–small cell lung cancer, one with stage IVA HER-2 positive breast cancer, one with stage II urothelial carcinoma, and one with multiple myeloma.

Four patients were alive and receiving subsequent lines of therapy. Two of these patients had significant responses to anti–PD-1 therapy.

Three patients have died, two of whom had documented recurrence of their malignancy. The last two patients were lost to follow-up without documented recurrence.

“Our results demonstrate that the OpenVax pipeline is a viable approach to generate a safe, personalized cancer vaccine, which could potentially be used to treat a range of tumor types,” Dr. Bhardwaj said.

Trials combining neoantigens identified with the OpenVax platform are ongoing in patients with urothelial carcinoma and glioblastoma multiforme, Dr. Marron said.

The current study ( NCT02721043 ) is sponsored by Dr. Bhardwaj. Dr. Marron and Dr. Bhardwaj reported having no disclosures. Their colleagues disclosed relationships with Bristol Myers Squibb, Sema4, and Related Sciences.

A personalized genomic cancer vaccine proved feasible to manufacture and was well tolerated in a phase 1 trial, according to researchers.

The vaccine, PGV-001, was given to 13 patients with solid tumors or multiple myeloma who had a high risk of recurrence after surgery or autologous stem cell transplant.

At last follow-up, four patients were still alive without evidence of disease and had not received subsequent therapy, four were alive and receiving therapy, three had died, and two were lost to follow-up.

Thomas Marron, MD, PhD , of Mount Sinai in New York presented these results in a poster at the American Association for Cancer Research Annual Meeting 2021: Week 1 ( Abstract LB048 ). Data in the abstract differ from the data presented.

“While cancer immunotherapy has revolutionized the treatment of cancer, we know that the majority of patients fail to achieve significant clinical response,” Dr. Marron said during his presentation. “One reason for this may be due to lack of preexisting primed T-cell response needed for PD-1 blockade to have a significant effect. To address this, personalized neoantigen vaccines may help prime an improved immune response against tumor cells.”

With this in mind, Dr. Marron and colleagues developed PGV-001, a vaccine consisting of patient-specific synthetic neoantigen peptides given to patients in the adjuvant setting.
 

Creating a personalized vaccine

The researchers synthesized PGV-001 for 15 patients with advanced malignancies. The patients first underwent tumor and germline DNA sequencing as well as HLA typing. Bulk RNA sequencing was performed on patients’ tumors as well.

Then, the researchers used a computational pipeline called OpenVax to identify candidate neoantigens. This pipeline, developed at Mount Sinai, identified and prioritized candidate neoantigens using predicted MHC class I binding affinity and neoantigen abundance.

OpenVax identified an average of 71.5 neoantigens per patient (range, 7-193). The goal was to synthesize a maximum of 10 peptides per patient, but two patients did not have an adequate number of neoantigens.
 

Vaccine administration

The peptides were administered over the course of 27 weeks along with poly-ICLC and a tetanus helper peptide. Before receiving their vaccine doses, patients with solid tumors had undergone curative-intent surgery, and those with multiple myeloma had undergone autologous stem cell transplant.

“Most experimental personalized cancer vaccines are administered in the metastatic setting, but prior research indicates that immunotherapies tend to be more effective in patients who have less cancer spread,” principal investigator Nina Bhardwaj, MD, PhD , of Mount Sinai, explained in a press release .

“We have, therefore, developed a neoantigen vaccine that is administered after standard-of-care adjuvant therapy, such as surgery in solid tumors and bone marrow transplant in multiple myeloma, when patients have minimal, typically microscopic, residual disease.”
 

Feasibility, safety, and immunogenicity

PGV-001 was synthesized for 15 patients and administered to 13 of them. Six of the 13 patients had head and neck squamous cell carcinoma, three had multiple myeloma, two had non–small cell lung cancer, one had breast cancer, and one had urothelial carcinoma.

Eleven patients received all 10 intended doses, and two patients received at least 8 doses.

“The vaccine was well tolerated, with only half of patients experiencing mild, grade 1 adverse events,” Dr. Marron said.

Transient injection site reactions occurred in four patients, and grade 1 fever was reported in one patient.

Immune monitoring is ongoing, but an initial analysis in one patient showed “robust responses” in CD4 and CD8 T cells by intracellular cytokine staining for interferon-gamma, tumor necrosis factor–alpha, and interleukin-2 after in vitro expansion in the presence of vaccine antigens, according to the researchers.

Dr. Marron noted that robust T-cell reactivity was seen at the completion of all 10 doses but was not seen after the 6th dose, and this supports the need for a prolonged dosing schedule.
 

Survival and subsequent therapy

At a mean follow-up of 880 days, four patients had no evidence of disease and had not received subsequent therapy. This includes one patient with stage IIIA non–small cell lung cancer, one with stage IVA HER-2 positive breast cancer, one with stage II urothelial carcinoma, and one with multiple myeloma.

Four patients were alive and receiving subsequent lines of therapy. Two of these patients had significant responses to anti–PD-1 therapy.

Three patients have died, two of whom had documented recurrence of their malignancy. The last two patients were lost to follow-up without documented recurrence.

“Our results demonstrate that the OpenVax pipeline is a viable approach to generate a safe, personalized cancer vaccine, which could potentially be used to treat a range of tumor types,” Dr. Bhardwaj said.

Trials combining neoantigens identified with the OpenVax platform are ongoing in patients with urothelial carcinoma and glioblastoma multiforme, Dr. Marron said.

The current study ( NCT02721043 ) is sponsored by Dr. Bhardwaj. Dr. Marron and Dr. Bhardwaj reported having no disclosures. Their colleagues disclosed relationships with Bristol Myers Squibb, Sema4, and Related Sciences.

A personalized genomic cancer vaccine proved feasible to manufacture and was well tolerated in a phase 1 trial, according to researchers.

The vaccine, PGV-001, was given to 13 patients with solid tumors or multiple myeloma who had a high risk of recurrence after surgery or autologous stem cell transplant.

At last follow-up, four patients were still alive without evidence of disease and had not received subsequent therapy, four were alive and receiving therapy, three had died, and two were lost to follow-up.

Thomas Marron, MD, PhD , of Mount Sinai in New York presented these results in a poster at the American Association for Cancer Research Annual Meeting 2021: Week 1 ( Abstract LB048 ). Data in the abstract differ from the data presented.

“While cancer immunotherapy has revolutionized the treatment of cancer, we know that the majority of patients fail to achieve significant clinical response,” Dr. Marron said during his presentation. “One reason for this may be due to lack of preexisting primed T-cell response needed for PD-1 blockade to have a significant effect. To address this, personalized neoantigen vaccines may help prime an improved immune response against tumor cells.”

With this in mind, Dr. Marron and colleagues developed PGV-001, a vaccine consisting of patient-specific synthetic neoantigen peptides given to patients in the adjuvant setting.
 

Creating a personalized vaccine

The researchers synthesized PGV-001 for 15 patients with advanced malignancies. The patients first underwent tumor and germline DNA sequencing as well as HLA typing. Bulk RNA sequencing was performed on patients’ tumors as well.

Then, the researchers used a computational pipeline called OpenVax to identify candidate neoantigens. This pipeline, developed at Mount Sinai, identified and prioritized candidate neoantigens using predicted MHC class I binding affinity and neoantigen abundance.

OpenVax identified an average of 71.5 neoantigens per patient (range, 7-193). The goal was to synthesize a maximum of 10 peptides per patient, but two patients did not have an adequate number of neoantigens.
 

Vaccine administration

The peptides were administered over the course of 27 weeks along with poly-ICLC and a tetanus helper peptide. Before receiving their vaccine doses, patients with solid tumors had undergone curative-intent surgery, and those with multiple myeloma had undergone autologous stem cell transplant.

“Most experimental personalized cancer vaccines are administered in the metastatic setting, but prior research indicates that immunotherapies tend to be more effective in patients who have less cancer spread,” principal investigator Nina Bhardwaj, MD, PhD , of Mount Sinai, explained in a press release .

“We have, therefore, developed a neoantigen vaccine that is administered after standard-of-care adjuvant therapy, such as surgery in solid tumors and bone marrow transplant in multiple myeloma, when patients have minimal, typically microscopic, residual disease.”
 

Feasibility, safety, and immunogenicity

PGV-001 was synthesized for 15 patients and administered to 13 of them. Six of the 13 patients had head and neck squamous cell carcinoma, three had multiple myeloma, two had non–small cell lung cancer, one had breast cancer, and one had urothelial carcinoma.

Eleven patients received all 10 intended doses, and two patients received at least 8 doses.

“The vaccine was well tolerated, with only half of patients experiencing mild, grade 1 adverse events,” Dr. Marron said.

Transient injection site reactions occurred in four patients, and grade 1 fever was reported in one patient.

Immune monitoring is ongoing, but an initial analysis in one patient showed “robust responses” in CD4 and CD8 T cells by intracellular cytokine staining for interferon-gamma, tumor necrosis factor–alpha, and interleukin-2 after in vitro expansion in the presence of vaccine antigens, according to the researchers.

Dr. Marron noted that robust T-cell reactivity was seen at the completion of all 10 doses but was not seen after the 6th dose, and this supports the need for a prolonged dosing schedule.
 

Survival and subsequent therapy

At a mean follow-up of 880 days, four patients had no evidence of disease and had not received subsequent therapy. This includes one patient with stage IIIA non–small cell lung cancer, one with stage IVA HER-2 positive breast cancer, one with stage II urothelial carcinoma, and one with multiple myeloma.

Four patients were alive and receiving subsequent lines of therapy. Two of these patients had significant responses to anti–PD-1 therapy.

Three patients have died, two of whom had documented recurrence of their malignancy. The last two patients were lost to follow-up without documented recurrence.

“Our results demonstrate that the OpenVax pipeline is a viable approach to generate a safe, personalized cancer vaccine, which could potentially be used to treat a range of tumor types,” Dr. Bhardwaj said.

Trials combining neoantigens identified with the OpenVax platform are ongoing in patients with urothelial carcinoma and glioblastoma multiforme, Dr. Marron said.

The current study ( NCT02721043 ) is sponsored by Dr. Bhardwaj. Dr. Marron and Dr. Bhardwaj reported having no disclosures. Their colleagues disclosed relationships with Bristol Myers Squibb, Sema4, and Related Sciences.

The next 20 years will see a big shift in cancer type rankings, researchers predict.

At the moment, the most common cancers in the United States are breast, lung, prostate, colorectal, and melanoma.

By 2040, melanoma will have become the second most common cancer type, while prostate cancer will drop in incidence all the way to 14, the study authors predicted. Breast cancer will remain the top cancer to be diagnosed, lung cancer will drop from second to third, and colorectal cancer will remain at fourth.

These predicted rankings of cancer types by their total number of annual cases were published online April 7, 2021, in JAMA Network Open.

The authors also rank cancer type by mortality. Currently, most cancer deaths are caused by lung cancer, followed by colorectal, pancreatic, and breast. By 2040, the most notable change in cancer deaths is that liver and intrahepatic bile duct cancer, currently at sixth, will jump up to third.

Two decades from now, the ranking in terms of cancer deaths will be lung, pancreatic, liver and intrahepatic bile duct, and colorectal.

“Our findings reflect the shifting dynamics of cancer screening and treatment,” lead author Lola Rahib, PhD, a pancreatic cancer scientist at Cancer Commons, the advocacy nonprofit, commented in a press statement.

The new analysis used population-growth projections (based on 2010 U.S. Census data) and current population-based cancer incidence and death rates (from Surveillance, Epidemiology, and End Results 2014-2016) to calculate the changes in incidences and deaths to the year 2040.

The projected, estimated numbers are not ironclad, the researchers acknowledged.

“Our projections assume that the observed rates and trends [from recent years] don’t change over time,” Dr. Rahib said in an interview, but she pointed out that change may indeed happen.

“Any long-term projections should be considered with a grain of salt,” said Kim Miller, MPH, a surveillance research scientist at the American Cancer Society, who was approached for comment.

Dr. Miller explained that “cancer trends can sometimes rapidly change within a few years.” Projections just 2-4 years ahead are “extremely difficult” and those 20 years ahead are even more so, she added in an interview.

“We’re encouraged to see the projected decreases in deaths from lung, colorectal, and breast cancer in the coming years,” said coauthor Lynn Matrisian, PhD, MBA, chief science officer at the Pancreatic Cancer Action Network. “It’s time to shift focus to some of the less commonly diagnosed cancers with the lowest survival rates, like pancreatic and liver cancer.”
 

Difference in opinion on prostate cancer

The huge fall in the incidence of prostate cancer that the authors predict will come about as a result of changes in prostate-specific antigen (PSA)–screening recommendations over the last 15 years, they suggested.

“The most recent change in 2018 recommends that men aged 55-69 can make their own decisions regarding screening, but previous changes recommended against PSA screening,” said Dr. Rahib.

“These changes in screening guidelines have influenced the number of diagnoses of prostate cancer in recent years and will continue to do so to 2040,” Dr. Rahib commented.

Dr. Miller casts doubt on this prediction.

Using data through 2017, “we have seen that the patterns in prostate cancer incidence are already shifting from the steep declines we saw in the early 2010s,” she said. “I would use caution when interpreting the overall trends for prostate, because this cancer in particular is dramatically affected by changes in recommendations for screening with the PSA test.”

Screening has also influenced colorectal cancer incidence, the authors pointed out, saying that the uptake of colorectal cancer screening is associated with a decrease in the number of colorectal cancers and deaths out to 2040, as a result of effectiveness of screening.

For breast cancer, the authors highlighted the fact that, although the number of breast cancers will continue to increase, the number of breast cancer deaths will decrease. That ongoing trend is most likely attributable to increased screening and advancements in treatment.

The study was supported by the National Institutes of Health, National Cancer Institute, the Cancer Prevention and Research Institute of Texas, Cancer Commons and the Pancreatic Cancer Action Network. The study authors and Dr. Miller disclosed no relevant financial relationships.

A version of this article first appeared on Medscape.com.

The next 20 years will see a big shift in cancer type rankings, researchers predict.

At the moment, the most common cancers in the United States are breast, lung, prostate, colorectal, and melanoma.

By 2040, melanoma will have become the second most common cancer type, while prostate cancer will drop in incidence all the way to 14, the study authors predicted. Breast cancer will remain the top cancer to be diagnosed, lung cancer will drop from second to third, and colorectal cancer will remain at fourth.

These predicted rankings of cancer types by their total number of annual cases were published online April 7, 2021, in JAMA Network Open.

The authors also rank cancer type by mortality. Currently, most cancer deaths are caused by lung cancer, followed by colorectal, pancreatic, and breast. By 2040, the most notable change in cancer deaths is that liver and intrahepatic bile duct cancer, currently at sixth, will jump up to third.

Two decades from now, the ranking in terms of cancer deaths will be lung, pancreatic, liver and intrahepatic bile duct, and colorectal.

“Our findings reflect the shifting dynamics of cancer screening and treatment,” lead author Lola Rahib, PhD, a pancreatic cancer scientist at Cancer Commons, the advocacy nonprofit, commented in a press statement.

The new analysis used population-growth projections (based on 2010 U.S. Census data) and current population-based cancer incidence and death rates (from Surveillance, Epidemiology, and End Results 2014-2016) to calculate the changes in incidences and deaths to the year 2040.

The projected, estimated numbers are not ironclad, the researchers acknowledged.

“Our projections assume that the observed rates and trends [from recent years] don’t change over time,” Dr. Rahib said in an interview, but she pointed out that change may indeed happen.

“Any long-term projections should be considered with a grain of salt,” said Kim Miller, MPH, a surveillance research scientist at the American Cancer Society, who was approached for comment.

Dr. Miller explained that “cancer trends can sometimes rapidly change within a few years.” Projections just 2-4 years ahead are “extremely difficult” and those 20 years ahead are even more so, she added in an interview.

“We’re encouraged to see the projected decreases in deaths from lung, colorectal, and breast cancer in the coming years,” said coauthor Lynn Matrisian, PhD, MBA, chief science officer at the Pancreatic Cancer Action Network. “It’s time to shift focus to some of the less commonly diagnosed cancers with the lowest survival rates, like pancreatic and liver cancer.”
 

Difference in opinion on prostate cancer

The huge fall in the incidence of prostate cancer that the authors predict will come about as a result of changes in prostate-specific antigen (PSA)–screening recommendations over the last 15 years, they suggested.

“The most recent change in 2018 recommends that men aged 55-69 can make their own decisions regarding screening, but previous changes recommended against PSA screening,” said Dr. Rahib.

“These changes in screening guidelines have influenced the number of diagnoses of prostate cancer in recent years and will continue to do so to 2040,” Dr. Rahib commented.

Dr. Miller casts doubt on this prediction.

Using data through 2017, “we have seen that the patterns in prostate cancer incidence are already shifting from the steep declines we saw in the early 2010s,” she said. “I would use caution when interpreting the overall trends for prostate, because this cancer in particular is dramatically affected by changes in recommendations for screening with the PSA test.”

Screening has also influenced colorectal cancer incidence, the authors pointed out, saying that the uptake of colorectal cancer screening is associated with a decrease in the number of colorectal cancers and deaths out to 2040, as a result of effectiveness of screening.

For breast cancer, the authors highlighted the fact that, although the number of breast cancers will continue to increase, the number of breast cancer deaths will decrease. That ongoing trend is most likely attributable to increased screening and advancements in treatment.

The study was supported by the National Institutes of Health, National Cancer Institute, the Cancer Prevention and Research Institute of Texas, Cancer Commons and the Pancreatic Cancer Action Network. The study authors and Dr. Miller disclosed no relevant financial relationships.

A version of this article first appeared on Medscape.com.

The next 20 years will see a big shift in cancer type rankings, researchers predict.

At the moment, the most common cancers in the United States are breast, lung, prostate, colorectal, and melanoma.

By 2040, melanoma will have become the second most common cancer type, while prostate cancer will drop in incidence all the way to 14, the study authors predicted. Breast cancer will remain the top cancer to be diagnosed, lung cancer will drop from second to third, and colorectal cancer will remain at fourth.

These predicted rankings of cancer types by their total number of annual cases were published online April 7, 2021, in JAMA Network Open.

The authors also rank cancer type by mortality. Currently, most cancer deaths are caused by lung cancer, followed by colorectal, pancreatic, and breast. By 2040, the most notable change in cancer deaths is that liver and intrahepatic bile duct cancer, currently at sixth, will jump up to third.

Two decades from now, the ranking in terms of cancer deaths will be lung, pancreatic, liver and intrahepatic bile duct, and colorectal.

“Our findings reflect the shifting dynamics of cancer screening and treatment,” lead author Lola Rahib, PhD, a pancreatic cancer scientist at Cancer Commons, the advocacy nonprofit, commented in a press statement.

The new analysis used population-growth projections (based on 2010 U.S. Census data) and current population-based cancer incidence and death rates (from Surveillance, Epidemiology, and End Results 2014-2016) to calculate the changes in incidences and deaths to the year 2040.

The projected, estimated numbers are not ironclad, the researchers acknowledged.

“Our projections assume that the observed rates and trends [from recent years] don’t change over time,” Dr. Rahib said in an interview, but she pointed out that change may indeed happen.

“Any long-term projections should be considered with a grain of salt,” said Kim Miller, MPH, a surveillance research scientist at the American Cancer Society, who was approached for comment.

Dr. Miller explained that “cancer trends can sometimes rapidly change within a few years.” Projections just 2-4 years ahead are “extremely difficult” and those 20 years ahead are even more so, she added in an interview.

“We’re encouraged to see the projected decreases in deaths from lung, colorectal, and breast cancer in the coming years,” said coauthor Lynn Matrisian, PhD, MBA, chief science officer at the Pancreatic Cancer Action Network. “It’s time to shift focus to some of the less commonly diagnosed cancers with the lowest survival rates, like pancreatic and liver cancer.”
 

Difference in opinion on prostate cancer

The huge fall in the incidence of prostate cancer that the authors predict will come about as a result of changes in prostate-specific antigen (PSA)–screening recommendations over the last 15 years, they suggested.

“The most recent change in 2018 recommends that men aged 55-69 can make their own decisions regarding screening, but previous changes recommended against PSA screening,” said Dr. Rahib.

“These changes in screening guidelines have influenced the number of diagnoses of prostate cancer in recent years and will continue to do so to 2040,” Dr. Rahib commented.

Dr. Miller casts doubt on this prediction.

Using data through 2017, “we have seen that the patterns in prostate cancer incidence are already shifting from the steep declines we saw in the early 2010s,” she said. “I would use caution when interpreting the overall trends for prostate, because this cancer in particular is dramatically affected by changes in recommendations for screening with the PSA test.”

Screening has also influenced colorectal cancer incidence, the authors pointed out, saying that the uptake of colorectal cancer screening is associated with a decrease in the number of colorectal cancers and deaths out to 2040, as a result of effectiveness of screening.

For breast cancer, the authors highlighted the fact that, although the number of breast cancers will continue to increase, the number of breast cancer deaths will decrease. That ongoing trend is most likely attributable to increased screening and advancements in treatment.

The study was supported by the National Institutes of Health, National Cancer Institute, the Cancer Prevention and Research Institute of Texas, Cancer Commons and the Pancreatic Cancer Action Network. The study authors and Dr. Miller disclosed no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Children and adolescents with leukemia who were placed on a restrictive diet and exercise regimen concurrent with starting chemotherapy showed responses to treatment that were better than those historically seen in such patients.

This apparently improved response suggests it is possible to boost treatment efficacy without raising the dose – or toxicity – of chemotherapy.

“To our knowledge, this is the first study in any hematologic malignancy to demonstrate potential benefit from caloric restriction via diet and exercise to augment chemotherapy efficacy and improve disease response, the authors reported.

The findings come from the IDEAL pilot trial, conducted in 40 young patients (mean age, 15 years; range, 10-21 years) diagnosed with high-risk B-cell acute lymphoblastic leukemia (B-ALL).

The study was published online April 1 in Blood Advances.

The diet and exercise regimen is a departure from current recommendations for patients with leukemia.

“This was a major paradigm shift – until now, many oncologists encouraged ‘comfort foods’ and increased calories to get through the rigor of chemotherapy,” first author Etan Orgel, MD, of Children’s Hospital Los Angeles and the University of Southern California, also in Los Angeles.

The results from this pilot trial suggest that “the era of encouraging comfort food should be in the past; over-nutrition is likely harmful, and diet and exercise are important tools to harness during chemotherapy,” he said.

Dr. Orgel added that childhood ALL was selected because it is the most common cancer of childhood, but the findings could have potential relevance in other cancer types in children as well as adults.

Commenting on the study, Patrick Brown, MD, director of the pediatric leukemia program at Johns Hopkins University, Baltimore, said the findings are important, albeit preliminary.

“I think the most important contribution of this pilot study is to show that it is possible to change the nutrition and exercise habits of children and adolescents during the initial month of treatment for ALL,” he said in an interview.

“We have to be cautious about the preliminary finding that these changes resulted in deeper remissions – this will need to be confirmed in a larger study,” added Dr. Brown, who was not involved with the research.

Dr. Orgel noted that a prospective, randomized trial, IDEAL-2, is launching later this year to further evaluate the intervention.
 

Obesity linked to poorer chemotherapy response

Among children and adolescents who start treatment for B-ALL, as many as 40% are overweight or obese, noted the study authors.

Those who are obese have more than a twofold greater risk of having persistent minimal residual disease (MRD) at the end of chemotherapy, considered the strongest patient-level predictor of poor outcome and a common guide for therapy intensification.

The problem is compounded by weight gain that is common during treatment as a result of prolonged chemotherapy and sedentary behavior, they commented.

With studies of obese mice linking calorie and fat restriction to improved survival after chemotherapy, the authors theorized that a calorie- and fat-restrictive diet and exercise could help improve outcomes after chemotherapy in humans.

Participants were enrolled at Children’s Hospital Los Angeles and City of Hope National Medical Center in nearby Duarte. After they were started on chemotherapy, they were placed on a low-carb, low-fat, and low-sugar diet tailored to patient needs and preferences, as well as a moderate daily exercise regimen, and continued on this regimen throughout the 4-week induction phase.

Following the intervention, there were no significant reductions observed in median gain of fat mass at the end of the intervention, compared with baseline (P = .13). However, in the subgroup of patients who were overweight or obese at baseline, the reduction in fat mass was indeed significant versus baseline (+1.5% vs. +9.7% at baseline; P = .02).

Importantly, after adjustment for prognostic factors, adherence to the intervention was associated with a significant reduction in the risk of MRD, compared with recent historical controls who received the same induction therapy at the same institution, but no intervention (odds ratio, 0.30; P = .02).

The intervention was also associated with a lower detectable MRD, compared with the historical controls (OR, 0.16; one-sided P = .002).

“Most importantly, the IDEAL intervention reduced risk of MRD at the end of induction in all patients, irrespective of starting [body mass index] and after accounting for prognostic features,” the authors noted.
 

Adherence to diet high, exercise low

As many as 82% of study participants achieved the goal of 20% or more caloric deficit throughout the chemotherapy.

“Adherence to the diet was excellent, with caloric deficits and macronutrient goals achieved in nearly all patients, including in the lean group,” the authors reported.

Dr. Orgel added that families embraced the chance to play an active role in the cancer therapy. “In our view, they couldn’t control their disease or their chemotherapy, but this, they could,” he said.

Conversely, adherence to the prescribed exercise was low – just 31.2%, with the inactivity during the first month likely contributed to the similar loss of muscle mass that occurred in both cohorts, Dr. Orgel noted.

“The [low exercise adherence] unfortunately was not a surprise, as it is often difficult to exercise and be active during chemotherapy,” he said.

Key aspects of physical activity will be refined in further studies, Dr. Orgel added.
 

Insulin sensitivity, adiponectin key factors?

Patients receiving the intervention showed improved insulin sensitivity and reductions in circulating insulin, which are notable in that insulin has been linked to mechanisms that counter chemoresistance, the authors noted.

Furthermore, the decreases in insulin were accompanied by notable elevations in circulating adiponectin, a protein hormone produced and secreted by fat cells.

“Adiponectin was certainly a surprise, as until now it did not appear to play a major role in cancer cell resistance to chemotherapy,” Dr. Orgel said.

“It is too soon to say they are central to the mechanism of the intervention, but the large differences in adiponectin and insulin sensitivity found in children in the trial have definitely highlighted these as important for future study,” he added.

Dr. Orgel, the study coauthors, and Dr. Brown disclosed no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Children and adolescents with leukemia who were placed on a restrictive diet and exercise regimen concurrent with starting chemotherapy showed responses to treatment that were better than those historically seen in such patients.

This apparently improved response suggests it is possible to boost treatment efficacy without raising the dose – or toxicity – of chemotherapy.

“To our knowledge, this is the first study in any hematologic malignancy to demonstrate potential benefit from caloric restriction via diet and exercise to augment chemotherapy efficacy and improve disease response, the authors reported.

The findings come from the IDEAL pilot trial, conducted in 40 young patients (mean age, 15 years; range, 10-21 years) diagnosed with high-risk B-cell acute lymphoblastic leukemia (B-ALL).

The study was published online April 1 in Blood Advances.

The diet and exercise regimen is a departure from current recommendations for patients with leukemia.

“This was a major paradigm shift – until now, many oncologists encouraged ‘comfort foods’ and increased calories to get through the rigor of chemotherapy,” first author Etan Orgel, MD, of Children’s Hospital Los Angeles and the University of Southern California, also in Los Angeles.

The results from this pilot trial suggest that “the era of encouraging comfort food should be in the past; over-nutrition is likely harmful, and diet and exercise are important tools to harness during chemotherapy,” he said.

Dr. Orgel added that childhood ALL was selected because it is the most common cancer of childhood, but the findings could have potential relevance in other cancer types in children as well as adults.

Commenting on the study, Patrick Brown, MD, director of the pediatric leukemia program at Johns Hopkins University, Baltimore, said the findings are important, albeit preliminary.

“I think the most important contribution of this pilot study is to show that it is possible to change the nutrition and exercise habits of children and adolescents during the initial month of treatment for ALL,” he said in an interview.

“We have to be cautious about the preliminary finding that these changes resulted in deeper remissions – this will need to be confirmed in a larger study,” added Dr. Brown, who was not involved with the research.

Dr. Orgel noted that a prospective, randomized trial, IDEAL-2, is launching later this year to further evaluate the intervention.
 

Obesity linked to poorer chemotherapy response

Among children and adolescents who start treatment for B-ALL, as many as 40% are overweight or obese, noted the study authors.

Those who are obese have more than a twofold greater risk of having persistent minimal residual disease (MRD) at the end of chemotherapy, considered the strongest patient-level predictor of poor outcome and a common guide for therapy intensification.

The problem is compounded by weight gain that is common during treatment as a result of prolonged chemotherapy and sedentary behavior, they commented.

With studies of obese mice linking calorie and fat restriction to improved survival after chemotherapy, the authors theorized that a calorie- and fat-restrictive diet and exercise could help improve outcomes after chemotherapy in humans.

Participants were enrolled at Children’s Hospital Los Angeles and City of Hope National Medical Center in nearby Duarte. After they were started on chemotherapy, they were placed on a low-carb, low-fat, and low-sugar diet tailored to patient needs and preferences, as well as a moderate daily exercise regimen, and continued on this regimen throughout the 4-week induction phase.

Following the intervention, there were no significant reductions observed in median gain of fat mass at the end of the intervention, compared with baseline (P = .13). However, in the subgroup of patients who were overweight or obese at baseline, the reduction in fat mass was indeed significant versus baseline (+1.5% vs. +9.7% at baseline; P = .02).

Importantly, after adjustment for prognostic factors, adherence to the intervention was associated with a significant reduction in the risk of MRD, compared with recent historical controls who received the same induction therapy at the same institution, but no intervention (odds ratio, 0.30; P = .02).

The intervention was also associated with a lower detectable MRD, compared with the historical controls (OR, 0.16; one-sided P = .002).

“Most importantly, the IDEAL intervention reduced risk of MRD at the end of induction in all patients, irrespective of starting [body mass index] and after accounting for prognostic features,” the authors noted.
 

Adherence to diet high, exercise low

As many as 82% of study participants achieved the goal of 20% or more caloric deficit throughout the chemotherapy.

“Adherence to the diet was excellent, with caloric deficits and macronutrient goals achieved in nearly all patients, including in the lean group,” the authors reported.

Dr. Orgel added that families embraced the chance to play an active role in the cancer therapy. “In our view, they couldn’t control their disease or their chemotherapy, but this, they could,” he said.

Conversely, adherence to the prescribed exercise was low – just 31.2%, with the inactivity during the first month likely contributed to the similar loss of muscle mass that occurred in both cohorts, Dr. Orgel noted.

“The [low exercise adherence] unfortunately was not a surprise, as it is often difficult to exercise and be active during chemotherapy,” he said.

Key aspects of physical activity will be refined in further studies, Dr. Orgel added.
 

Insulin sensitivity, adiponectin key factors?

Patients receiving the intervention showed improved insulin sensitivity and reductions in circulating insulin, which are notable in that insulin has been linked to mechanisms that counter chemoresistance, the authors noted.

Furthermore, the decreases in insulin were accompanied by notable elevations in circulating adiponectin, a protein hormone produced and secreted by fat cells.

“Adiponectin was certainly a surprise, as until now it did not appear to play a major role in cancer cell resistance to chemotherapy,” Dr. Orgel said.

“It is too soon to say they are central to the mechanism of the intervention, but the large differences in adiponectin and insulin sensitivity found in children in the trial have definitely highlighted these as important for future study,” he added.

Dr. Orgel, the study coauthors, and Dr. Brown disclosed no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Children and adolescents with leukemia who were placed on a restrictive diet and exercise regimen concurrent with starting chemotherapy showed responses to treatment that were better than those historically seen in such patients.

This apparently improved response suggests it is possible to boost treatment efficacy without raising the dose – or toxicity – of chemotherapy.

“To our knowledge, this is the first study in any hematologic malignancy to demonstrate potential benefit from caloric restriction via diet and exercise to augment chemotherapy efficacy and improve disease response, the authors reported.

The findings come from the IDEAL pilot trial, conducted in 40 young patients (mean age, 15 years; range, 10-21 years) diagnosed with high-risk B-cell acute lymphoblastic leukemia (B-ALL).

The study was published online April 1 in Blood Advances.

The diet and exercise regimen is a departure from current recommendations for patients with leukemia.

“This was a major paradigm shift – until now, many oncologists encouraged ‘comfort foods’ and increased calories to get through the rigor of chemotherapy,” first author Etan Orgel, MD, of Children’s Hospital Los Angeles and the University of Southern California, also in Los Angeles.

The results from this pilot trial suggest that “the era of encouraging comfort food should be in the past; over-nutrition is likely harmful, and diet and exercise are important tools to harness during chemotherapy,” he said.

Dr. Orgel added that childhood ALL was selected because it is the most common cancer of childhood, but the findings could have potential relevance in other cancer types in children as well as adults.

Commenting on the study, Patrick Brown, MD, director of the pediatric leukemia program at Johns Hopkins University, Baltimore, said the findings are important, albeit preliminary.

“I think the most important contribution of this pilot study is to show that it is possible to change the nutrition and exercise habits of children and adolescents during the initial month of treatment for ALL,” he said in an interview.

“We have to be cautious about the preliminary finding that these changes resulted in deeper remissions – this will need to be confirmed in a larger study,” added Dr. Brown, who was not involved with the research.

Dr. Orgel noted that a prospective, randomized trial, IDEAL-2, is launching later this year to further evaluate the intervention.
 

Obesity linked to poorer chemotherapy response

Among children and adolescents who start treatment for B-ALL, as many as 40% are overweight or obese, noted the study authors.

Those who are obese have more than a twofold greater risk of having persistent minimal residual disease (MRD) at the end of chemotherapy, considered the strongest patient-level predictor of poor outcome and a common guide for therapy intensification.

The problem is compounded by weight gain that is common during treatment as a result of prolonged chemotherapy and sedentary behavior, they commented.

With studies of obese mice linking calorie and fat restriction to improved survival after chemotherapy, the authors theorized that a calorie- and fat-restrictive diet and exercise could help improve outcomes after chemotherapy in humans.

Participants were enrolled at Children’s Hospital Los Angeles and City of Hope National Medical Center in nearby Duarte. After they were started on chemotherapy, they were placed on a low-carb, low-fat, and low-sugar diet tailored to patient needs and preferences, as well as a moderate daily exercise regimen, and continued on this regimen throughout the 4-week induction phase.

Following the intervention, there were no significant reductions observed in median gain of fat mass at the end of the intervention, compared with baseline (P = .13). However, in the subgroup of patients who were overweight or obese at baseline, the reduction in fat mass was indeed significant versus baseline (+1.5% vs. +9.7% at baseline; P = .02).

Importantly, after adjustment for prognostic factors, adherence to the intervention was associated with a significant reduction in the risk of MRD, compared with recent historical controls who received the same induction therapy at the same institution, but no intervention (odds ratio, 0.30; P = .02).

The intervention was also associated with a lower detectable MRD, compared with the historical controls (OR, 0.16; one-sided P = .002).

“Most importantly, the IDEAL intervention reduced risk of MRD at the end of induction in all patients, irrespective of starting [body mass index] and after accounting for prognostic features,” the authors noted.
 

Adherence to diet high, exercise low

As many as 82% of study participants achieved the goal of 20% or more caloric deficit throughout the chemotherapy.

“Adherence to the diet was excellent, with caloric deficits and macronutrient goals achieved in nearly all patients, including in the lean group,” the authors reported.

Dr. Orgel added that families embraced the chance to play an active role in the cancer therapy. “In our view, they couldn’t control their disease or their chemotherapy, but this, they could,” he said.

Conversely, adherence to the prescribed exercise was low – just 31.2%, with the inactivity during the first month likely contributed to the similar loss of muscle mass that occurred in both cohorts, Dr. Orgel noted.

“The [low exercise adherence] unfortunately was not a surprise, as it is often difficult to exercise and be active during chemotherapy,” he said.

Key aspects of physical activity will be refined in further studies, Dr. Orgel added.
 

Insulin sensitivity, adiponectin key factors?

Patients receiving the intervention showed improved insulin sensitivity and reductions in circulating insulin, which are notable in that insulin has been linked to mechanisms that counter chemoresistance, the authors noted.

Furthermore, the decreases in insulin were accompanied by notable elevations in circulating adiponectin, a protein hormone produced and secreted by fat cells.

“Adiponectin was certainly a surprise, as until now it did not appear to play a major role in cancer cell resistance to chemotherapy,” Dr. Orgel said.

“It is too soon to say they are central to the mechanism of the intervention, but the large differences in adiponectin and insulin sensitivity found in children in the trial have definitely highlighted these as important for future study,” he added.

Dr. Orgel, the study coauthors, and Dr. Brown disclosed no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Adhering to a healthy lifestyle may offset the heightened risk of lethal prostate cancer in patients with adverse genetic risk factors, according to results of a large U.S. study.

In men at the highest risk of dying from prostate cancer, having the highest healthy lifestyle scores cut the risk of fatal disease in half, said study author Anna Plym, PhD, of Brigham and Women’s Hospital and Harvard School of Public Health, both in Boston. She presented these findings at the American Association for Cancer Research Annual Meeting 2021: Week 1 (Abstract 822).

Dr. Plym noted that about 58% of the variability in prostate cancer risk is accounted for by genetic factors, with common single-nucleotide polymorphisms (SNPs) accounting for a substantial proportion of prostate cancer susceptibility.

A recent study showed that a polygenic risk score (PRS) derived by combining information from 269 SNPs was “highly predictive” of prostate cancer, Dr. Plym said. There was a 10-fold gradient in disease risk between the lowest and highest genetic risk deciles, and the pattern was consistent across ethnic groups.

In addition, Dr. Plym noted, previous studies have suggested that a healthy lifestyle reduces lethal prostate cancer risk.

What has remained unclear is whether the risk for both developing prostate cancer and experiencing progression to lethal disease can be offset by adherence to a healthy lifestyle.

To investigate, Dr. Plym and colleagues used the 269-SNP PRS to quantify the genetic risk of prostate cancer in 10,443 men enrolled in the Health Professionals Follow-up Study. The men were divided into quartiles according to genetic risk.

The investigators also classified the men using a validated lifestyle score. For this score, one point was given for each of the following: not currently smoking or having quit 10 or more years ago, body mass index under 30 kg/m², high vigorous physical activity, high intake of tomatoes and fatty fish, and low intake of processed meat. Patients with 1-2 points were considered the least healthy, those with 3 points were moderately healthy, and those with 4-6 points were the most healthy.

The outcomes assessed were overall prostate cancer and lethal prostate cancer (i.e., metastatic disease or prostate cancer–specific death).
 

No overall benefit of healthy lifestyle

At a median follow-up of 18 years, 2,111 cases of prostate cancer were observed. And at a median follow-up of 22 years, 238 lethal prostate cancer events occurred.

Men in the highest genetic risk quartile were five times more likely to develop prostate cancer (hazard ratio, 5.39; 95% confidence interval, 4.59-6.34) and three times more likely to develop lethal prostate cancer (HR, 3.43; 95% CI, 2.29-5.14), when compared with men in the lowest genetic risk quartile.

Adherence to a healthy lifestyle did not decrease the risk of prostate cancer overall (HR, 1.01; 95% CI, 0.84-1.22), nor did it affect men in the lower genetic risk quartiles.

However, healthy lifestyle did appear to affect men in the highest genetic risk quartile. Men with the highest healthy lifestyle scores had roughly half the risk of lethal prostate cancer, compared to men with the lowest lifestyle scores (3% vs. 6%).
 

A counterbalance to genetic risk

Dr. Plym observed that the rate of lethal disease in men with the best lifestyle scores matched the rate for the study population as a whole (3%), suggesting that healthy lifestyle may counterbalance high genetic risk.

She added that previous research has confirmed physical activity as a protective factor, but more study is needed to shed light on the relative benefit of the healthy lifestyle components.

In addition, further research is necessary to explain why the benefit was limited to lethal prostate cancer risk in men with the highest genetic risk.

Dr. Plym speculated that the genetic variants contributing to a high PRS may also be the variants that have the strongest interaction with lifestyle factors. For men with a genetic predisposition to prostate cancer, she added, these findings underscore the potential value of surveillance.

“Our findings add to current evidence suggesting that men with a high genetic risk may benefit from a targeted prostate cancer screening program, aiming at detecting a potentially lethal prostate cancer while it is still curable,” she said.

Charles Swanton, MBPhD, of the Francis Crick Institute and UCL Cancer Institute in London, raised the possibility that competing risk issues could be at play.

If a healthy lifestyle leads to longer life, he asked, does that make it more likely that patients will live long enough to die from their prostate cancer because they are not dying from cardiovascular disease, complications of diabetes, etc.? In that case, is the healthy lifestyle really affecting prostate cancer at all?

Dr. Plym responded that, among those in the highest genetic risk group with an unhealthy lifestyle, the increased risk for prostate cancer exceeded the risk for other illnesses.

This study was funded by the DiNovi Family Foundation, the National Cancer Institute, the William Casey Foundation, the Swedish Society for Medical Research, and the Prostate Cancer Foundation. Dr. Plym declared no conflicts of interest. Dr. Swanton disclosed relationships with numerous companies, including Pfizer, Novartis, and GlaxoSmithKline.

Adhering to a healthy lifestyle may offset the heightened risk of lethal prostate cancer in patients with adverse genetic risk factors, according to results of a large U.S. study.

In men at the highest risk of dying from prostate cancer, having the highest healthy lifestyle scores cut the risk of fatal disease in half, said study author Anna Plym, PhD, of Brigham and Women’s Hospital and Harvard School of Public Health, both in Boston. She presented these findings at the American Association for Cancer Research Annual Meeting 2021: Week 1 (Abstract 822).

Dr. Plym noted that about 58% of the variability in prostate cancer risk is accounted for by genetic factors, with common single-nucleotide polymorphisms (SNPs) accounting for a substantial proportion of prostate cancer susceptibility.

A recent study showed that a polygenic risk score (PRS) derived by combining information from 269 SNPs was “highly predictive” of prostate cancer, Dr. Plym said. There was a 10-fold gradient in disease risk between the lowest and highest genetic risk deciles, and the pattern was consistent across ethnic groups.

In addition, Dr. Plym noted, previous studies have suggested that a healthy lifestyle reduces lethal prostate cancer risk.

What has remained unclear is whether the risk for both developing prostate cancer and experiencing progression to lethal disease can be offset by adherence to a healthy lifestyle.

To investigate, Dr. Plym and colleagues used the 269-SNP PRS to quantify the genetic risk of prostate cancer in 10,443 men enrolled in the Health Professionals Follow-up Study. The men were divided into quartiles according to genetic risk.

The investigators also classified the men using a validated lifestyle score. For this score, one point was given for each of the following: not currently smoking or having quit 10 or more years ago, body mass index under 30 kg/m², high vigorous physical activity, high intake of tomatoes and fatty fish, and low intake of processed meat. Patients with 1-2 points were considered the least healthy, those with 3 points were moderately healthy, and those with 4-6 points were the most healthy.

The outcomes assessed were overall prostate cancer and lethal prostate cancer (i.e., metastatic disease or prostate cancer–specific death).
 

No overall benefit of healthy lifestyle

At a median follow-up of 18 years, 2,111 cases of prostate cancer were observed. And at a median follow-up of 22 years, 238 lethal prostate cancer events occurred.

Men in the highest genetic risk quartile were five times more likely to develop prostate cancer (hazard ratio, 5.39; 95% confidence interval, 4.59-6.34) and three times more likely to develop lethal prostate cancer (HR, 3.43; 95% CI, 2.29-5.14), when compared with men in the lowest genetic risk quartile.

Adherence to a healthy lifestyle did not decrease the risk of prostate cancer overall (HR, 1.01; 95% CI, 0.84-1.22), nor did it affect men in the lower genetic risk quartiles.

However, healthy lifestyle did appear to affect men in the highest genetic risk quartile. Men with the highest healthy lifestyle scores had roughly half the risk of lethal prostate cancer, compared to men with the lowest lifestyle scores (3% vs. 6%).
 

A counterbalance to genetic risk

Dr. Plym observed that the rate of lethal disease in men with the best lifestyle scores matched the rate for the study population as a whole (3%), suggesting that healthy lifestyle may counterbalance high genetic risk.

She added that previous research has confirmed physical activity as a protective factor, but more study is needed to shed light on the relative benefit of the healthy lifestyle components.

In addition, further research is necessary to explain why the benefit was limited to lethal prostate cancer risk in men with the highest genetic risk.

Dr. Plym speculated that the genetic variants contributing to a high PRS may also be the variants that have the strongest interaction with lifestyle factors. For men with a genetic predisposition to prostate cancer, she added, these findings underscore the potential value of surveillance.

“Our findings add to current evidence suggesting that men with a high genetic risk may benefit from a targeted prostate cancer screening program, aiming at detecting a potentially lethal prostate cancer while it is still curable,” she said.

Charles Swanton, MBPhD, of the Francis Crick Institute and UCL Cancer Institute in London, raised the possibility that competing risk issues could be at play.

If a healthy lifestyle leads to longer life, he asked, does that make it more likely that patients will live long enough to die from their prostate cancer because they are not dying from cardiovascular disease, complications of diabetes, etc.? In that case, is the healthy lifestyle really affecting prostate cancer at all?

Dr. Plym responded that, among those in the highest genetic risk group with an unhealthy lifestyle, the increased risk for prostate cancer exceeded the risk for other illnesses.

This study was funded by the DiNovi Family Foundation, the National Cancer Institute, the William Casey Foundation, the Swedish Society for Medical Research, and the Prostate Cancer Foundation. Dr. Plym declared no conflicts of interest. Dr. Swanton disclosed relationships with numerous companies, including Pfizer, Novartis, and GlaxoSmithKline.

Adhering to a healthy lifestyle may offset the heightened risk of lethal prostate cancer in patients with adverse genetic risk factors, according to results of a large U.S. study.

In men at the highest risk of dying from prostate cancer, having the highest healthy lifestyle scores cut the risk of fatal disease in half, said study author Anna Plym, PhD, of Brigham and Women’s Hospital and Harvard School of Public Health, both in Boston. She presented these findings at the American Association for Cancer Research Annual Meeting 2021: Week 1 (Abstract 822).

Dr. Plym noted that about 58% of the variability in prostate cancer risk is accounted for by genetic factors, with common single-nucleotide polymorphisms (SNPs) accounting for a substantial proportion of prostate cancer susceptibility.

A recent study showed that a polygenic risk score (PRS) derived by combining information from 269 SNPs was “highly predictive” of prostate cancer, Dr. Plym said. There was a 10-fold gradient in disease risk between the lowest and highest genetic risk deciles, and the pattern was consistent across ethnic groups.

In addition, Dr. Plym noted, previous studies have suggested that a healthy lifestyle reduces lethal prostate cancer risk.

What has remained unclear is whether the risk for both developing prostate cancer and experiencing progression to lethal disease can be offset by adherence to a healthy lifestyle.

To investigate, Dr. Plym and colleagues used the 269-SNP PRS to quantify the genetic risk of prostate cancer in 10,443 men enrolled in the Health Professionals Follow-up Study. The men were divided into quartiles according to genetic risk.

The investigators also classified the men using a validated lifestyle score. For this score, one point was given for each of the following: not currently smoking or having quit 10 or more years ago, body mass index under 30 kg/m², high vigorous physical activity, high intake of tomatoes and fatty fish, and low intake of processed meat. Patients with 1-2 points were considered the least healthy, those with 3 points were moderately healthy, and those with 4-6 points were the most healthy.

The outcomes assessed were overall prostate cancer and lethal prostate cancer (i.e., metastatic disease or prostate cancer–specific death).
 

No overall benefit of healthy lifestyle

At a median follow-up of 18 years, 2,111 cases of prostate cancer were observed. And at a median follow-up of 22 years, 238 lethal prostate cancer events occurred.

Men in the highest genetic risk quartile were five times more likely to develop prostate cancer (hazard ratio, 5.39; 95% confidence interval, 4.59-6.34) and three times more likely to develop lethal prostate cancer (HR, 3.43; 95% CI, 2.29-5.14), when compared with men in the lowest genetic risk quartile.

Adherence to a healthy lifestyle did not decrease the risk of prostate cancer overall (HR, 1.01; 95% CI, 0.84-1.22), nor did it affect men in the lower genetic risk quartiles.

However, healthy lifestyle did appear to affect men in the highest genetic risk quartile. Men with the highest healthy lifestyle scores had roughly half the risk of lethal prostate cancer, compared to men with the lowest lifestyle scores (3% vs. 6%).
 

A counterbalance to genetic risk

Dr. Plym observed that the rate of lethal disease in men with the best lifestyle scores matched the rate for the study population as a whole (3%), suggesting that healthy lifestyle may counterbalance high genetic risk.

She added that previous research has confirmed physical activity as a protective factor, but more study is needed to shed light on the relative benefit of the healthy lifestyle components.

In addition, further research is necessary to explain why the benefit was limited to lethal prostate cancer risk in men with the highest genetic risk.

Dr. Plym speculated that the genetic variants contributing to a high PRS may also be the variants that have the strongest interaction with lifestyle factors. For men with a genetic predisposition to prostate cancer, she added, these findings underscore the potential value of surveillance.

“Our findings add to current evidence suggesting that men with a high genetic risk may benefit from a targeted prostate cancer screening program, aiming at detecting a potentially lethal prostate cancer while it is still curable,” she said.

Charles Swanton, MBPhD, of the Francis Crick Institute and UCL Cancer Institute in London, raised the possibility that competing risk issues could be at play.

If a healthy lifestyle leads to longer life, he asked, does that make it more likely that patients will live long enough to die from their prostate cancer because they are not dying from cardiovascular disease, complications of diabetes, etc.? In that case, is the healthy lifestyle really affecting prostate cancer at all?

Dr. Plym responded that, among those in the highest genetic risk group with an unhealthy lifestyle, the increased risk for prostate cancer exceeded the risk for other illnesses.

This study was funded by the DiNovi Family Foundation, the National Cancer Institute, the William Casey Foundation, the Swedish Society for Medical Research, and the Prostate Cancer Foundation. Dr. Plym declared no conflicts of interest. Dr. Swanton disclosed relationships with numerous companies, including Pfizer, Novartis, and GlaxoSmithKline.

An experimental immunotherapy that contains a genetically altered version of herpes simplex virus type 1 (HSV-1) was associated with a doubling in median overall survival for children and adolescents with recurrent or progressive high-grade gliomas.

This is a rapidly fatal form of brain cancer. Among historical control patients, the median overall survival was only 5.3 months.

The new results show a median overall survival of 12.2 months.

They come from a phase 1 trial conducted in 12 patients aged 7-18 years who had high-grade gliomas. All of the patients received the experimental therapy, dubbed G207, which was infused directly into the brain tumors.

“In our secondary objectives, we saw promising overall survival data ... [and] we saw that G207 turned immunologically ‘cold’ tumors to ‘hot,’ ” said lead investigator Gregory K. Friedman, MD, from the University of Alabama at Birmingham.

Dr. Friedman presented the new data at the American Association for Cancer Research Annual Meeting 2021: Week 1 (Abstract CT018). The study was also published simultaneously online in the New England Journal of Medicine.

Although the number of patients in the study was small, the data from this early trial look promising, commented Howard Kaufman, MD, director of the Oncolytic Virus Research Laboratory at Massachusetts General Hospital, Boston, who was not involved in the study.

“This is just a horrendous disease that hasn’t really responded to anything, so seeing some signs of benefit as well as a pretty tolerable safety profile is a very important observation that I think merits further investigation,” he said in an interview.
 

Engineered virus

G207 is an oncolytic form of HSV-1 created through genetic engineering in which a neurovirulence gene was deleted and viral nucleotide reductase was disabled. The engineered mutations prevent HSV-1 from infecting normal cells while allowing the virus to replicate in tumor cells.

The oncolytic virus product can be inoculated directly into tumors to circumvent the blood-brain barrier, and it preferentially infects neural tissue, making it ideal for treating brain tumors, the investigators explain.

One example of this type of product is already on the market. Talimogene laherparepvec is an oncolytic HSV-1 therapy that was approved in 2015 by the Food and Drug Administration for local treatment (i.e., injection directly into the skin lesion) of unresectable cutaneous, subcutaneous, and nodal lesions in patients with melanoma that recurs after initial surgery.

In their article, Dr. Friedman and colleagues summarized some of the data with G207 that “provided a strong rationale for conducting a trial involving children and adolescents.

“In addition to infecting and lysing tumor cells directly, G207 can reverse tumor immune evasion, increase cross-presentation of tumor antigens, and promote an antitumor immune response even in the absence of virus permissivity,” they wrote. “A single radiation dose enhances G207 efficacy in animal models by increasing viral replication and spread.”

In preclinical studies using tumor xenografts, pediatric brain tumors were 11-fold more sensitive to G207, compared with glioblastomas in adults.

The researchers hypothesized that intratumoral G207 would increase the amount of tumor-infiltrating lymphocytes and thereby convert immunologically “cold” pediatric brain tumors to “hot” and “inflamed” tumors.
 

Phase 1 trial

The phase 1 trial included four dose cohorts of children and adolescents with a pathologically proven malignant supratentorial brain tumor of at least 1 cm in diameter that had progressed after surgery, radiotherapy, or chemotherapy.

There were three patients in each dose cohort. One cohort received 107 plaque-forming units, the second received 108 PFU, the third received 107 PFU with 5 Gy of radiation, and the fourth received 108 PFU with 5 Gy radiation.

The patients first underwent stereotactic placement of up to four intratumoral catheters. The next day, they underwent infusion of the assigned PFU doses by controlled-rate infusion over 6 hours.

For the patients who received radiation, 5 Gy were administered to the gross tumor volume within 24 hours following G207 administration.

Among the 12 patients, tumors included 10 glioblastomas, one anaplastic astrocytoma, and one high-grade glioma not otherwise specified.

Responses (radiographic, neuropathologic, or clinical) occurred in 11 of the 12 patients.

Four patients were still alive 18 months after treatment, “which exceeds the life expectancy for newly diagnosed patients,” Dr. Friedman noted. Most patients die within 1 year of being diagnosed with pediatric glioma.

The investigators also found evidence to suggest that survival may be improved for patients who experience seroconversion after exposure to HSV-1 in comparison to patients with HSV-1 antibodies from prior HSV-1 infection. The median overall survival was 18.3 months for patients who experienced seroconversion, compared with 5.1 months for three patients who, at baseline, had IgG antibodies to HSV-1.

No dose-limiting toxicities or serious adverse events attributable to G207 occurred. There were 20 grade 1 adverse events that were potentially related to G207.

There was no evidence of peripheral G207 shedding or viremia, the investigators reported.
 

Radiation effect?

Commenting on the results in an interview, Dr. Kaufman noted that the sample size (12 patients) in this study was too small to determine whether the radiation received by patients in two of the four cohorts had any additive effect.

“Whether to move forward with virus alone or to add the radiation remains an open question that I don’t think was adequately answered,” he said.

Regarding the evidence suggesting that survival was better among patients who did not have antibodies to HSV-1 at baseline, Dr. Kaufman said, “We’ve looked at that in the melanoma population but haven’t seen any correlation there, so that’s interesting.”

The finding could be related to the fact that this was a pediatric population, or it could be related to the location of the tumors in the brain.

“It’s an interesting finding, and it suggests that, in future studies, they might want to select patients who are HSV seronegative up front,” he said.

Dr. Friedman and colleagues are currently planning a phase 2 trial of G207 with 5 Gy of radiation for children and adolescents with recurrent or progressive high-grade gliomas.

The study was supported by grants from the FDA, the National Institutes of Health, Cannonball Kids’ Cancer Foundation, the Rally Foundation for Childhood Cancer Research, Hyundai Hope on Wheels, St. Baldrick’s Foundation, the Department of Defense, the Andrew McDonough B+ Foundation, and the Kaul Pediatric Research Institute; by NIH/National Cancer Institute Cancer Center support grants to the University of Alabama at Birmingham and to the Memorial Sloan Kettering Cancer Center; and by Kelsie’s Crew, Eli’s Block Party Childhood Cancer Foundation, the Eli Jackson Foundation, Jaxon’s FROG Foundation, Battle for a Cure Foundation, and Sandcastle Kids. Dr. Friedman has received grants/support from the organizations listed above, as well as from Eli Lilly and Pfizer. Dr. Kaufman disclosed no relevant financial relationships.

A version of this article first appeared on Medscape.com.

An experimental immunotherapy that contains a genetically altered version of herpes simplex virus type 1 (HSV-1) was associated with a doubling in median overall survival for children and adolescents with recurrent or progressive high-grade gliomas.

This is a rapidly fatal form of brain cancer. Among historical control patients, the median overall survival was only 5.3 months.

The new results show a median overall survival of 12.2 months.

They come from a phase 1 trial conducted in 12 patients aged 7-18 years who had high-grade gliomas. All of the patients received the experimental therapy, dubbed G207, which was infused directly into the brain tumors.

“In our secondary objectives, we saw promising overall survival data ... [and] we saw that G207 turned immunologically ‘cold’ tumors to ‘hot,’ ” said lead investigator Gregory K. Friedman, MD, from the University of Alabama at Birmingham.

Dr. Friedman presented the new data at the American Association for Cancer Research Annual Meeting 2021: Week 1 (Abstract CT018). The study was also published simultaneously online in the New England Journal of Medicine.

Although the number of patients in the study was small, the data from this early trial look promising, commented Howard Kaufman, MD, director of the Oncolytic Virus Research Laboratory at Massachusetts General Hospital, Boston, who was not involved in the study.

“This is just a horrendous disease that hasn’t really responded to anything, so seeing some signs of benefit as well as a pretty tolerable safety profile is a very important observation that I think merits further investigation,” he said in an interview.
 

Engineered virus

G207 is an oncolytic form of HSV-1 created through genetic engineering in which a neurovirulence gene was deleted and viral nucleotide reductase was disabled. The engineered mutations prevent HSV-1 from infecting normal cells while allowing the virus to replicate in tumor cells.

The oncolytic virus product can be inoculated directly into tumors to circumvent the blood-brain barrier, and it preferentially infects neural tissue, making it ideal for treating brain tumors, the investigators explain.

One example of this type of product is already on the market. Talimogene laherparepvec is an oncolytic HSV-1 therapy that was approved in 2015 by the Food and Drug Administration for local treatment (i.e., injection directly into the skin lesion) of unresectable cutaneous, subcutaneous, and nodal lesions in patients with melanoma that recurs after initial surgery.

In their article, Dr. Friedman and colleagues summarized some of the data with G207 that “provided a strong rationale for conducting a trial involving children and adolescents.

“In addition to infecting and lysing tumor cells directly, G207 can reverse tumor immune evasion, increase cross-presentation of tumor antigens, and promote an antitumor immune response even in the absence of virus permissivity,” they wrote. “A single radiation dose enhances G207 efficacy in animal models by increasing viral replication and spread.”

In preclinical studies using tumor xenografts, pediatric brain tumors were 11-fold more sensitive to G207, compared with glioblastomas in adults.

The researchers hypothesized that intratumoral G207 would increase the amount of tumor-infiltrating lymphocytes and thereby convert immunologically “cold” pediatric brain tumors to “hot” and “inflamed” tumors.
 

Phase 1 trial

The phase 1 trial included four dose cohorts of children and adolescents with a pathologically proven malignant supratentorial brain tumor of at least 1 cm in diameter that had progressed after surgery, radiotherapy, or chemotherapy.

There were three patients in each dose cohort. One cohort received 107 plaque-forming units, the second received 108 PFU, the third received 107 PFU with 5 Gy of radiation, and the fourth received 108 PFU with 5 Gy radiation.

The patients first underwent stereotactic placement of up to four intratumoral catheters. The next day, they underwent infusion of the assigned PFU doses by controlled-rate infusion over 6 hours.

For the patients who received radiation, 5 Gy were administered to the gross tumor volume within 24 hours following G207 administration.

Among the 12 patients, tumors included 10 glioblastomas, one anaplastic astrocytoma, and one high-grade glioma not otherwise specified.

Responses (radiographic, neuropathologic, or clinical) occurred in 11 of the 12 patients.

Four patients were still alive 18 months after treatment, “which exceeds the life expectancy for newly diagnosed patients,” Dr. Friedman noted. Most patients die within 1 year of being diagnosed with pediatric glioma.

The investigators also found evidence to suggest that survival may be improved for patients who experience seroconversion after exposure to HSV-1 in comparison to patients with HSV-1 antibodies from prior HSV-1 infection. The median overall survival was 18.3 months for patients who experienced seroconversion, compared with 5.1 months for three patients who, at baseline, had IgG antibodies to HSV-1.

No dose-limiting toxicities or serious adverse events attributable to G207 occurred. There were 20 grade 1 adverse events that were potentially related to G207.

There was no evidence of peripheral G207 shedding or viremia, the investigators reported.
 

Radiation effect?

Commenting on the results in an interview, Dr. Kaufman noted that the sample size (12 patients) in this study was too small to determine whether the radiation received by patients in two of the four cohorts had any additive effect.

“Whether to move forward with virus alone or to add the radiation remains an open question that I don’t think was adequately answered,” he said.

Regarding the evidence suggesting that survival was better among patients who did not have antibodies to HSV-1 at baseline, Dr. Kaufman said, “We’ve looked at that in the melanoma population but haven’t seen any correlation there, so that’s interesting.”

The finding could be related to the fact that this was a pediatric population, or it could be related to the location of the tumors in the brain.

“It’s an interesting finding, and it suggests that, in future studies, they might want to select patients who are HSV seronegative up front,” he said.

Dr. Friedman and colleagues are currently planning a phase 2 trial of G207 with 5 Gy of radiation for children and adolescents with recurrent or progressive high-grade gliomas.

The study was supported by grants from the FDA, the National Institutes of Health, Cannonball Kids’ Cancer Foundation, the Rally Foundation for Childhood Cancer Research, Hyundai Hope on Wheels, St. Baldrick’s Foundation, the Department of Defense, the Andrew McDonough B+ Foundation, and the Kaul Pediatric Research Institute; by NIH/National Cancer Institute Cancer Center support grants to the University of Alabama at Birmingham and to the Memorial Sloan Kettering Cancer Center; and by Kelsie’s Crew, Eli’s Block Party Childhood Cancer Foundation, the Eli Jackson Foundation, Jaxon’s FROG Foundation, Battle for a Cure Foundation, and Sandcastle Kids. Dr. Friedman has received grants/support from the organizations listed above, as well as from Eli Lilly and Pfizer. Dr. Kaufman disclosed no relevant financial relationships.

A version of this article first appeared on Medscape.com.

An experimental immunotherapy that contains a genetically altered version of herpes simplex virus type 1 (HSV-1) was associated with a doubling in median overall survival for children and adolescents with recurrent or progressive high-grade gliomas.

This is a rapidly fatal form of brain cancer. Among historical control patients, the median overall survival was only 5.3 months.

The new results show a median overall survival of 12.2 months.

They come from a phase 1 trial conducted in 12 patients aged 7-18 years who had high-grade gliomas. All of the patients received the experimental therapy, dubbed G207, which was infused directly into the brain tumors.

“In our secondary objectives, we saw promising overall survival data ... [and] we saw that G207 turned immunologically ‘cold’ tumors to ‘hot,’ ” said lead investigator Gregory K. Friedman, MD, from the University of Alabama at Birmingham.

Dr. Friedman presented the new data at the American Association for Cancer Research Annual Meeting 2021: Week 1 (Abstract CT018). The study was also published simultaneously online in the New England Journal of Medicine.

Although the number of patients in the study was small, the data from this early trial look promising, commented Howard Kaufman, MD, director of the Oncolytic Virus Research Laboratory at Massachusetts General Hospital, Boston, who was not involved in the study.

“This is just a horrendous disease that hasn’t really responded to anything, so seeing some signs of benefit as well as a pretty tolerable safety profile is a very important observation that I think merits further investigation,” he said in an interview.
 

Engineered virus

G207 is an oncolytic form of HSV-1 created through genetic engineering in which a neurovirulence gene was deleted and viral nucleotide reductase was disabled. The engineered mutations prevent HSV-1 from infecting normal cells while allowing the virus to replicate in tumor cells.

The oncolytic virus product can be inoculated directly into tumors to circumvent the blood-brain barrier, and it preferentially infects neural tissue, making it ideal for treating brain tumors, the investigators explain.

One example of this type of product is already on the market. Talimogene laherparepvec is an oncolytic HSV-1 therapy that was approved in 2015 by the Food and Drug Administration for local treatment (i.e., injection directly into the skin lesion) of unresectable cutaneous, subcutaneous, and nodal lesions in patients with melanoma that recurs after initial surgery.

In their article, Dr. Friedman and colleagues summarized some of the data with G207 that “provided a strong rationale for conducting a trial involving children and adolescents.

“In addition to infecting and lysing tumor cells directly, G207 can reverse tumor immune evasion, increase cross-presentation of tumor antigens, and promote an antitumor immune response even in the absence of virus permissivity,” they wrote. “A single radiation dose enhances G207 efficacy in animal models by increasing viral replication and spread.”

In preclinical studies using tumor xenografts, pediatric brain tumors were 11-fold more sensitive to G207, compared with glioblastomas in adults.

The researchers hypothesized that intratumoral G207 would increase the amount of tumor-infiltrating lymphocytes and thereby convert immunologically “cold” pediatric brain tumors to “hot” and “inflamed” tumors.
 

Phase 1 trial

The phase 1 trial included four dose cohorts of children and adolescents with a pathologically proven malignant supratentorial brain tumor of at least 1 cm in diameter that had progressed after surgery, radiotherapy, or chemotherapy.

There were three patients in each dose cohort. One cohort received 107 plaque-forming units, the second received 108 PFU, the third received 107 PFU with 5 Gy of radiation, and the fourth received 108 PFU with 5 Gy radiation.

The patients first underwent stereotactic placement of up to four intratumoral catheters. The next day, they underwent infusion of the assigned PFU doses by controlled-rate infusion over 6 hours.

For the patients who received radiation, 5 Gy were administered to the gross tumor volume within 24 hours following G207 administration.

Among the 12 patients, tumors included 10 glioblastomas, one anaplastic astrocytoma, and one high-grade glioma not otherwise specified.

Responses (radiographic, neuropathologic, or clinical) occurred in 11 of the 12 patients.

Four patients were still alive 18 months after treatment, “which exceeds the life expectancy for newly diagnosed patients,” Dr. Friedman noted. Most patients die within 1 year of being diagnosed with pediatric glioma.

The investigators also found evidence to suggest that survival may be improved for patients who experience seroconversion after exposure to HSV-1 in comparison to patients with HSV-1 antibodies from prior HSV-1 infection. The median overall survival was 18.3 months for patients who experienced seroconversion, compared with 5.1 months for three patients who, at baseline, had IgG antibodies to HSV-1.

No dose-limiting toxicities or serious adverse events attributable to G207 occurred. There were 20 grade 1 adverse events that were potentially related to G207.

There was no evidence of peripheral G207 shedding or viremia, the investigators reported.
 

Radiation effect?

Commenting on the results in an interview, Dr. Kaufman noted that the sample size (12 patients) in this study was too small to determine whether the radiation received by patients in two of the four cohorts had any additive effect.

“Whether to move forward with virus alone or to add the radiation remains an open question that I don’t think was adequately answered,” he said.

Regarding the evidence suggesting that survival was better among patients who did not have antibodies to HSV-1 at baseline, Dr. Kaufman said, “We’ve looked at that in the melanoma population but haven’t seen any correlation there, so that’s interesting.”

The finding could be related to the fact that this was a pediatric population, or it could be related to the location of the tumors in the brain.

“It’s an interesting finding, and it suggests that, in future studies, they might want to select patients who are HSV seronegative up front,” he said.

Dr. Friedman and colleagues are currently planning a phase 2 trial of G207 with 5 Gy of radiation for children and adolescents with recurrent or progressive high-grade gliomas.

The study was supported by grants from the FDA, the National Institutes of Health, Cannonball Kids’ Cancer Foundation, the Rally Foundation for Childhood Cancer Research, Hyundai Hope on Wheels, St. Baldrick’s Foundation, the Department of Defense, the Andrew McDonough B+ Foundation, and the Kaul Pediatric Research Institute; by NIH/National Cancer Institute Cancer Center support grants to the University of Alabama at Birmingham and to the Memorial Sloan Kettering Cancer Center; and by Kelsie’s Crew, Eli’s Block Party Childhood Cancer Foundation, the Eli Jackson Foundation, Jaxon’s FROG Foundation, Battle for a Cure Foundation, and Sandcastle Kids. Dr. Friedman has received grants/support from the organizations listed above, as well as from Eli Lilly and Pfizer. Dr. Kaufman disclosed no relevant financial relationships.

A version of this article first appeared on Medscape.com.

The Food and Drug Administration has granted its first-ever approval of an artificial intelligence device to help find colon lesions during colonoscopy.

The GI Genius (Cosmo Artificial Intelligence) identifies areas of the colon where a colorectal polyp or tumor might be located. Clinicians then follow up with a closer examination and possible treatment.

“With the FDA’s authorization of this device today, clinicians now have a tool that could help improve their ability to detect gastrointestinal lesions they may have missed otherwise,” said Courtney H. Lias, PhD, acting director of the FDA’s gastrorenal, ob.gyn., general hospital, and urology devices office, in a media release.

The GI Genius consists of both hardware and software designed to work with an endoscope. It uses machine learning to recognize possible polyps during a colonoscopy. It marks these areas with green squares on the video generated by the endoscope’s camera and emits a short, low-volume sound. Clinicians decide if a lesion is truly present and whether to sample or remove such a lesion.

The device does not diagnose the lesions or recommend treatments and is not intended to take the place of laboratory sampling

The FDA based its approval on a trial in which 700 people aged 40-80 years underwent colonoscopies for colorectal cancer screening, surveillance, follow-up from positive results of a fecal occult blood test, or gastrointestinal symptoms of possible colon cancer.

Of these participants, 263 were being screened or surveilled every 3 years or more. The researchers randomly divided patients into a group of 136 who underwent white-light standard colonoscopy with the GI Genius, and 127 who underwent white-light standard colonoscopy without the GI Genius.

Using the GI Genius, clinicians identified adenomas or carcinomas that were later confirmed through lab results in 55.1% of patients. Without the GI Genius, the clinicians identified such lesions in 42.0% of patients.

The patients examined with the GI Genius received more biopsies, including slightly more that were not adenomas. But the biopsies did not lead to any adverse events such as perforations, infections, bleeding, or further biopsies.

More information on the GI Genius is available on the FDA website.

A version of this article first appeared on Medscape.com .

The Food and Drug Administration has granted its first-ever approval of an artificial intelligence device to help find colon lesions during colonoscopy.

The GI Genius (Cosmo Artificial Intelligence) identifies areas of the colon where a colorectal polyp or tumor might be located. Clinicians then follow up with a closer examination and possible treatment.

“With the FDA’s authorization of this device today, clinicians now have a tool that could help improve their ability to detect gastrointestinal lesions they may have missed otherwise,” said Courtney H. Lias, PhD, acting director of the FDA’s gastrorenal, ob.gyn., general hospital, and urology devices office, in a media release.

The GI Genius consists of both hardware and software designed to work with an endoscope. It uses machine learning to recognize possible polyps during a colonoscopy. It marks these areas with green squares on the video generated by the endoscope’s camera and emits a short, low-volume sound. Clinicians decide if a lesion is truly present and whether to sample or remove such a lesion.

The device does not diagnose the lesions or recommend treatments and is not intended to take the place of laboratory sampling

The FDA based its approval on a trial in which 700 people aged 40-80 years underwent colonoscopies for colorectal cancer screening, surveillance, follow-up from positive results of a fecal occult blood test, or gastrointestinal symptoms of possible colon cancer.

Of these participants, 263 were being screened or surveilled every 3 years or more. The researchers randomly divided patients into a group of 136 who underwent white-light standard colonoscopy with the GI Genius, and 127 who underwent white-light standard colonoscopy without the GI Genius.

Using the GI Genius, clinicians identified adenomas or carcinomas that were later confirmed through lab results in 55.1% of patients. Without the GI Genius, the clinicians identified such lesions in 42.0% of patients.

The patients examined with the GI Genius received more biopsies, including slightly more that were not adenomas. But the biopsies did not lead to any adverse events such as perforations, infections, bleeding, or further biopsies.

More information on the GI Genius is available on the FDA website.

A version of this article first appeared on Medscape.com .

The Food and Drug Administration has granted its first-ever approval of an artificial intelligence device to help find colon lesions during colonoscopy.

The GI Genius (Cosmo Artificial Intelligence) identifies areas of the colon where a colorectal polyp or tumor might be located. Clinicians then follow up with a closer examination and possible treatment.

“With the FDA’s authorization of this device today, clinicians now have a tool that could help improve their ability to detect gastrointestinal lesions they may have missed otherwise,” said Courtney H. Lias, PhD, acting director of the FDA’s gastrorenal, ob.gyn., general hospital, and urology devices office, in a media release.

The GI Genius consists of both hardware and software designed to work with an endoscope. It uses machine learning to recognize possible polyps during a colonoscopy. It marks these areas with green squares on the video generated by the endoscope’s camera and emits a short, low-volume sound. Clinicians decide if a lesion is truly present and whether to sample or remove such a lesion.

The device does not diagnose the lesions or recommend treatments and is not intended to take the place of laboratory sampling

The FDA based its approval on a trial in which 700 people aged 40-80 years underwent colonoscopies for colorectal cancer screening, surveillance, follow-up from positive results of a fecal occult blood test, or gastrointestinal symptoms of possible colon cancer.

Of these participants, 263 were being screened or surveilled every 3 years or more. The researchers randomly divided patients into a group of 136 who underwent white-light standard colonoscopy with the GI Genius, and 127 who underwent white-light standard colonoscopy without the GI Genius.

Using the GI Genius, clinicians identified adenomas or carcinomas that were later confirmed through lab results in 55.1% of patients. Without the GI Genius, the clinicians identified such lesions in 42.0% of patients.

The patients examined with the GI Genius received more biopsies, including slightly more that were not adenomas. But the biopsies did not lead to any adverse events such as perforations, infections, bleeding, or further biopsies.

More information on the GI Genius is available on the FDA website.

A version of this article first appeared on Medscape.com .