Pilot study of mutant ras peptide-based vaccine as an adjuvant treatment in pancreatic and colorectal cancers

Introduction There is mounting evidence describing the immunosuppressive role of bulky metastatic disease, thus countering the therapeutic effects of tumor vaccine. Therefore, adjuvant immunotherapy may have a better impact on clinical outcome. In this phase II clinical trial, we aimed to test the f...

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Veröffentlicht in:Cancer Immunology, Immunotherapy Immunotherapy, 2008-09, Vol.57 (9), p.1413-1420
Hauptverfasser: Toubaji, Antoun, Achtar, Moujahed, Provenzano, Maurizio, Herrin, Vincent E., Behrens, Robert, Hamilton, Michael, Bernstein, Sarah, Venzon, David, Gause, Barry, Marincola, Francesco, Khleif, Samir N.
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container_end_page 1420
container_issue 9
container_start_page 1413
container_title Cancer Immunology, Immunotherapy
container_volume 57
creator Toubaji, Antoun
Achtar, Moujahed
Provenzano, Maurizio
Herrin, Vincent E.
Behrens, Robert
Hamilton, Michael
Bernstein, Sarah
Venzon, David
Gause, Barry
Marincola, Francesco
Khleif, Samir N.
description Introduction There is mounting evidence describing the immunosuppressive role of bulky metastatic disease, thus countering the therapeutic effects of tumor vaccine. Therefore, adjuvant immunotherapy may have a better impact on clinical outcome. In this phase II clinical trial, we aimed to test the feasibility of using a specific mutant ras peptide vaccine as an adjuvant immunotherapy in pancreatic and colorectal cancer patients. Materials and methods Twelve patients with no evidence of disease (NED), five pancreatic and seven colorectal cancer patients were vaccinated subcutaneously with 13-mer mutant ras peptide, corresponding to their tumor’s ras mutation. Vaccinations were given every 4 weeks, up to a total of six vaccines. Results No serious acute or delayed systemic side effects were seen. We detected specific immune responses to the relevant mutant ras peptide by measuring IFN-gamma mRNA expression by quantitative real-time PCR. Five out of eleven patients showed a positive immune response. Furthermore, the five pancreatic cancer patients have shown a mean disease-free survival (DFS) of 35.2+ months and a mean overall survival (OS) of 44.4+ months. The seven colorectal cancer patients have shown a mean disease-free survival (DFS) of 27.2+ months and a mean overall survival (OS) of 41.5+ months. Conclusion In this study, we found that it is feasible to use mutant ras vaccine in the adjuvant setting. This vaccine is safe, can induce specific immune responses, and it appears to have a positive outcome in overall survival. Therefore, we believe that such an approach warrants further investigation in combination with other therapies.
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Therefore, adjuvant immunotherapy may have a better impact on clinical outcome. In this phase II clinical trial, we aimed to test the feasibility of using a specific mutant ras peptide vaccine as an adjuvant immunotherapy in pancreatic and colorectal cancer patients. Materials and methods Twelve patients with no evidence of disease (NED), five pancreatic and seven colorectal cancer patients were vaccinated subcutaneously with 13-mer mutant ras peptide, corresponding to their tumor’s ras mutation. Vaccinations were given every 4 weeks, up to a total of six vaccines. Results No serious acute or delayed systemic side effects were seen. We detected specific immune responses to the relevant mutant ras peptide by measuring IFN-gamma mRNA expression by quantitative real-time PCR. Five out of eleven patients showed a positive immune response. Furthermore, the five pancreatic cancer patients have shown a mean disease-free survival (DFS) of 35.2+ months and a mean overall survival (OS) of 44.4+ months. The seven colorectal cancer patients have shown a mean disease-free survival (DFS) of 27.2+ months and a mean overall survival (OS) of 41.5+ months. Conclusion In this study, we found that it is feasible to use mutant ras vaccine in the adjuvant setting. This vaccine is safe, can induce specific immune responses, and it appears to have a positive outcome in overall survival. Therefore, we believe that such an approach warrants further investigation in combination with other therapies.</description><identifier>ISSN: 0340-7004</identifier><identifier>EISSN: 1432-0851</identifier><identifier>DOI: 10.1007/s00262-008-0477-6</identifier><identifier>PMID: 18297281</identifier><identifier>CODEN: CIIMDN</identifier><language>eng</language><publisher>Berlin/Heidelberg: Springer-Verlag</publisher><subject>Adjuvants, Immunologic - therapeutic use ; Adult ; Aged ; Antineoplastic agents ; Biological and medical sciences ; Cancer Research ; Cancer Vaccines - chemistry ; Cancer Vaccines - therapeutic use ; Colorectal Neoplasms - genetics ; Colorectal Neoplasms - therapy ; Disease-Free Survival ; Female ; Gastroenterology. Liver. Pancreas. Abdomen ; Genes, ras ; Humans ; Immunology ; Immunotherapy ; Immunotherapy - methods ; Liver. Biliary tract. Portal circulation. 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Therefore, adjuvant immunotherapy may have a better impact on clinical outcome. In this phase II clinical trial, we aimed to test the feasibility of using a specific mutant ras peptide vaccine as an adjuvant immunotherapy in pancreatic and colorectal cancer patients. Materials and methods Twelve patients with no evidence of disease (NED), five pancreatic and seven colorectal cancer patients were vaccinated subcutaneously with 13-mer mutant ras peptide, corresponding to their tumor’s ras mutation. Vaccinations were given every 4 weeks, up to a total of six vaccines. Results No serious acute or delayed systemic side effects were seen. We detected specific immune responses to the relevant mutant ras peptide by measuring IFN-gamma mRNA expression by quantitative real-time PCR. Five out of eleven patients showed a positive immune response. Furthermore, the five pancreatic cancer patients have shown a mean disease-free survival (DFS) of 35.2+ months and a mean overall survival (OS) of 44.4+ months. The seven colorectal cancer patients have shown a mean disease-free survival (DFS) of 27.2+ months and a mean overall survival (OS) of 41.5+ months. Conclusion In this study, we found that it is feasible to use mutant ras vaccine in the adjuvant setting. This vaccine is safe, can induce specific immune responses, and it appears to have a positive outcome in overall survival. Therefore, we believe that such an approach warrants further investigation in combination with other therapies.</description><subject>Adjuvants, Immunologic - therapeutic use</subject><subject>Adult</subject><subject>Aged</subject><subject>Antineoplastic agents</subject><subject>Biological and medical sciences</subject><subject>Cancer Research</subject><subject>Cancer Vaccines - chemistry</subject><subject>Cancer Vaccines - therapeutic use</subject><subject>Colorectal Neoplasms - genetics</subject><subject>Colorectal Neoplasms - therapy</subject><subject>Disease-Free Survival</subject><subject>Female</subject><subject>Gastroenterology. Liver. Pancreas. Abdomen</subject><subject>Genes, ras</subject><subject>Humans</subject><subject>Immunology</subject><subject>Immunotherapy</subject><subject>Immunotherapy - methods</subject><subject>Liver. Biliary tract. Portal circulation. 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Therefore, adjuvant immunotherapy may have a better impact on clinical outcome. In this phase II clinical trial, we aimed to test the feasibility of using a specific mutant ras peptide vaccine as an adjuvant immunotherapy in pancreatic and colorectal cancer patients. Materials and methods Twelve patients with no evidence of disease (NED), five pancreatic and seven colorectal cancer patients were vaccinated subcutaneously with 13-mer mutant ras peptide, corresponding to their tumor’s ras mutation. Vaccinations were given every 4 weeks, up to a total of six vaccines. Results No serious acute or delayed systemic side effects were seen. We detected specific immune responses to the relevant mutant ras peptide by measuring IFN-gamma mRNA expression by quantitative real-time PCR. Five out of eleven patients showed a positive immune response. Furthermore, the five pancreatic cancer patients have shown a mean disease-free survival (DFS) of 35.2+ months and a mean overall survival (OS) of 44.4+ months. The seven colorectal cancer patients have shown a mean disease-free survival (DFS) of 27.2+ months and a mean overall survival (OS) of 41.5+ months. Conclusion In this study, we found that it is feasible to use mutant ras vaccine in the adjuvant setting. This vaccine is safe, can induce specific immune responses, and it appears to have a positive outcome in overall survival. Therefore, we believe that such an approach warrants further investigation in combination with other therapies.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer-Verlag</pub><pmid>18297281</pmid><doi>10.1007/s00262-008-0477-6</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record>
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subjects Adjuvants, Immunologic - therapeutic use
Adult
Aged
Antineoplastic agents
Biological and medical sciences
Cancer Research
Cancer Vaccines - chemistry
Cancer Vaccines - therapeutic use
Colorectal Neoplasms - genetics
Colorectal Neoplasms - therapy
Disease-Free Survival
Female
Gastroenterology. Liver. Pancreas. Abdomen
Genes, ras
Humans
Immunology
Immunotherapy
Immunotherapy - methods
Liver. Biliary tract. Portal circulation. Exocrine pancreas
Male
Medical sciences
Medicine
Medicine & Public Health
Middle Aged
Mutation
Oncology
Original
Original Article
Pancreatic Neoplasms - genetics
Pancreatic Neoplasms - therapy
Pharmacology. Drug treatments
Pilot Projects
Stomach. Duodenum. Small intestine. Colon. Rectum. Anus
Tumors
title Pilot study of mutant ras peptide-based vaccine as an adjuvant treatment in pancreatic and colorectal cancers
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