Back to Search
Start Over
Generation of a systemic antitumor response with regional intratumoral injections of interferon gamma retroviral vector
- Source :
- Human gene therapy. 9(15)
- Publication Year :
- 1998
-
Abstract
- The generation of a lasting systemic immune response is a primary goal for cancer immunotherapy. Here we examine the ability of high-titer IFN-gamma retroviral vector injected into an accessible tumor to generate significant antitumor responses at a distal untreated site. CT26 or B16F10 murine tumors were inoculated subcutaneously to form solid tumors in BALB/c or C57BL/6 mice. Seven to 10 days postinoculation, high-titer IFN-gamma retroviral vector was directly injected into the subcutaneous tumor nodule, and optimal dose and course of therapy were determined. As a model for disseminated disease, mice were inoculated intravenously with CT26 cells to form pulmonary lesions, at the same time as the subcutaneous injections. Regression of subcutaneous tumor correlated with a systemic response at the distal lung metastases in the IFN-gamma-treated group (p < 0.0005). Splenocytes from mice with completely regressed tumors had a twofold increase in percent specific cytotoxicity in a standard CTL assay as compared with nonresponding mice. CD8+ T cells were shown to be essential for the regional and systemic antitumor response, as determined by in vivo cell depletion experiments. These data demonstrate that IFN-gamma retroviral vector gene therapy delivered intralesionally can generate significant inhibition of pulmonary tumor formation distal to the treatment site. The data from these preclinical studies suggest the potential clinical value of retroviral vector-mediated cytokine gene therapy for systemic cancer.
- Subjects :
- CD4-Positive T-Lymphocytes
Lung Neoplasms
Skin Neoplasms
medicine.medical_treatment
Genetic enhancement
Genetic Vectors
Viral vector
Interferon-gamma
Mice
Immune system
Cancer immunotherapy
Genetics
medicine
Tumor Cells, Cultured
Animals
Interferon gamma
Molecular Biology
Melanoma
Mice, Inbred BALB C
business.industry
Cancer
Immunotherapy
Genetic Therapy
medicine.disease
Cytotoxicity Tests, Immunologic
Recombinant Proteins
Mice, Inbred C57BL
Retroviridae
Immunology
Cancer research
Molecular Medicine
Female
business
Colorectal Neoplasms
medicine.drug
T-Lymphocytes, Cytotoxic
Subjects
Details
- ISSN :
- 10430342
- Volume :
- 9
- Issue :
- 15
- Database :
- OpenAIRE
- Journal :
- Human gene therapy
- Accession number :
- edsair.doi.dedup.....d21de3e732753e0faba7b351871e872c