Latest Publication re GVAX
Posted: Sun May 31, 2015 12:38 am
I really wish this article was not behind a paywall so I could link it - I think this is highly significant insight into immunotherapy and ASPS based on what was learned in the GVAX trial. I have pasted in the abstract as a start.
The full article concludes with this sentence: "Our clinical and laboratory investigations suggest that a combination of autologous cancer vaccination, VEGFR inhibition, and PD-1 blockade might effectively antagonize major host factors that impede immune-mediated tumor destruction."
http://www.ncbi.nlm.nih.gov/pubmed/25805798
Biologic Activity of Autologous, Granulocyte-Macrophage Colony-Stimulating Factor Secreting Alveolar Soft-Part Sarcoma and Clear Cell Sarcoma Vaccines.
Goldberg JM1, Fisher DE2, Demetri GD3, Neuberg D4, Allsop SA5, Fonseca C5, Nakazaki Y5, Nemer D5, Raut CP6, George S7, Morgan JA7, Wagner AJ8, Freeman GJ5, Ritz J5, Lezcano C9, Mihm M10, Canning C5, Hodi FS11, Dranoff G12.
Author information
Abstract
PURPOSE:
Alveolar soft-part sarcoma (ASPS) and clear cell sarcoma (CCS) are rare mesenchymal malignancies driven by chromosomal translocations that activate members of the microphthalmia transcription factor (MITF) family. However, in contrast to malignant melanoma, little is known about their immunogenicity. To learn more about the host response to ASPS and CCS, we conducted a phase I clinical trial of vaccination with irradiated, autologous sarcoma cells engineered by adenoviral-mediated gene transfer to secrete granulocyte-macrophage colony-stimulating factor (GM-CSF).
EXPERIMENTAL DESIGN:
Metastatic tumors from ASPS and CCS patients were resected, processed to single-cell suspensions, transduced with a replication-defective adenoviral vector encoding GM-CSF, and irradiated. Immunizations were administered subcutaneously and intradermally weekly three times and then every other week.
RESULTS:
Vaccines were successfully manufactured for 11 of the 12 enrolled patients. Eleven subjects received from three to 13 immunizations. Toxicities were restricted to grade 1-2 skin reactions at inoculation sites. Vaccination elicited local dendritic cell infiltrates and stimulated T cell-mediated delayed-type hypersensitivity reactions to irradiated, autologous tumor cells. Antibody responses to tissue-type plasminogen activator (tTPA) and angiopoietins-1/2 were detected. Tumor biopsies showed programmed death-1 (PD-1)-positive CD8+ T cells in association with PD ligand-1 (PD-L1)-expressing sarcoma cells. No tumor regressions were observed.
CONCLUSIONS:
Vaccination with irradiated, GM-CSF-secreting autologous sarcoma cell vaccines is feasible, safe, and biologically active. Concurrent targeting of angiogenic cytokines and antagonism of the PD-1-negative regulatory pathway might intensify immune-mediated tumor destruction. Clin Cancer Res; 1-9. ©2015 AACR.
The full article concludes with this sentence: "Our clinical and laboratory investigations suggest that a combination of autologous cancer vaccination, VEGFR inhibition, and PD-1 blockade might effectively antagonize major host factors that impede immune-mediated tumor destruction."
http://www.ncbi.nlm.nih.gov/pubmed/25805798
Biologic Activity of Autologous, Granulocyte-Macrophage Colony-Stimulating Factor Secreting Alveolar Soft-Part Sarcoma and Clear Cell Sarcoma Vaccines.
Goldberg JM1, Fisher DE2, Demetri GD3, Neuberg D4, Allsop SA5, Fonseca C5, Nakazaki Y5, Nemer D5, Raut CP6, George S7, Morgan JA7, Wagner AJ8, Freeman GJ5, Ritz J5, Lezcano C9, Mihm M10, Canning C5, Hodi FS11, Dranoff G12.
Author information
Abstract
PURPOSE:
Alveolar soft-part sarcoma (ASPS) and clear cell sarcoma (CCS) are rare mesenchymal malignancies driven by chromosomal translocations that activate members of the microphthalmia transcription factor (MITF) family. However, in contrast to malignant melanoma, little is known about their immunogenicity. To learn more about the host response to ASPS and CCS, we conducted a phase I clinical trial of vaccination with irradiated, autologous sarcoma cells engineered by adenoviral-mediated gene transfer to secrete granulocyte-macrophage colony-stimulating factor (GM-CSF).
EXPERIMENTAL DESIGN:
Metastatic tumors from ASPS and CCS patients were resected, processed to single-cell suspensions, transduced with a replication-defective adenoviral vector encoding GM-CSF, and irradiated. Immunizations were administered subcutaneously and intradermally weekly three times and then every other week.
RESULTS:
Vaccines were successfully manufactured for 11 of the 12 enrolled patients. Eleven subjects received from three to 13 immunizations. Toxicities were restricted to grade 1-2 skin reactions at inoculation sites. Vaccination elicited local dendritic cell infiltrates and stimulated T cell-mediated delayed-type hypersensitivity reactions to irradiated, autologous tumor cells. Antibody responses to tissue-type plasminogen activator (tTPA) and angiopoietins-1/2 were detected. Tumor biopsies showed programmed death-1 (PD-1)-positive CD8+ T cells in association with PD ligand-1 (PD-L1)-expressing sarcoma cells. No tumor regressions were observed.
CONCLUSIONS:
Vaccination with irradiated, GM-CSF-secreting autologous sarcoma cell vaccines is feasible, safe, and biologically active. Concurrent targeting of angiogenic cytokines and antagonism of the PD-1-negative regulatory pathway might intensify immune-mediated tumor destruction. Clin Cancer Res; 1-9. ©2015 AACR.