Cross-trial Analysis of Immunologic and Clinical Data Resulting From Phase I and II Trials of MVA-5T4 (TroVax) in Colorectal, Renal, and Prostate Cancer Patients
| Autor: | Peter Treasure, Michelle Kelleher, Richard Harrop, William Shingler, Jackie de Belin |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Adult
Male Oncology Cancer Research medicine.medical_specialty Colorectal cancer Immunology Cancer Vaccines Prostate cancer Antigen Antigens Neoplasm Internal medicine Vaccines DNA Humans Immunology and Allergy Medicine Pharmacology Membrane Glycoproteins TroVax business.industry Vaccination Prostatic Neoplasms Cancer Middle Aged medicine.disease Survival Analysis Kidney Neoplasms Tumor antigen Immunity Humoral Female Colorectal Neoplasms business Oncofetal antigen Kidney cancer |
| Zdroj: | Journal of Immunotherapy. 33:999-1005 |
| ISSN: | 1524-9557 |
| Popis: | The attenuated vaccinia virus MVA has been engineered to deliver the tumor antigen 5T4 (MVA-5T4; TroVax), a surface glycoprotein expressed by most solid tumors. MVA-5T4 has been tested in 2 phase I/II and 7 phase II clinical trials in colorectal (4 trials), renal (4 trials), and prostate (1 trial) advanced cancer patients. Data have been collated from all 9 studies and used to investigate the magnitude and kinetics of 5T4-specific antibody responses after vaccination and to identify potential associations between the immune response and patient survival. Antibody responses specific for the 5T4 tumor antigen and the MVA viral vector were quantified in plasma samples taken from cancer patients before and after the treatment with MVA-5T4. Immunologic and survival data were analyzed using proportional hazards regression adjusting for age and gender. Both survival and immunologic response data were available for 189 patients with colorectal (n = 73), renal (n = 89), and prostate (n = 27) cancer. Before the treatment with MVA-5T4, 5T4-specific antibody levels were significantly elevated in cancer patients compared with healthy donors. After MVA-5T4 administration, 5T4-specific antibody responses increased significantly and peaked after 3 to 4 vaccinations. Exploratory analyses showed significant associations between 5T4 antibody responses and overall survival across all 9 trials and in patients with colorectal cancer. The 5T4-specific antibodies were present at higher levels in cancer patients compared with healthy donors and increased significantly after treatment with MVA-5T4. Although the studies were uncontrolled, there were encouraging signs of activity which is associated with the magnitude of 5T4-specific antibody responses. |
| Databáze: | OpenAIRE |
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