
Interferon-mediated protection of B16 melanoma cells from cytotoxicity by activated macrophages.
Corynebacterium parvum-activated macrophages (M phi), purified by adherence, were cytotoxic for B16 melanoma cells maintained in vitro. Pretreatment of the melanoma cells for 18 hr with interferon-alpha/beta or -gamma (IFN-alpha/beta or -gamma) caused a reduced susceptibility of the B16 cells to M phi-mediated cytotoxicity. The IFN-induced protective effect of B16 cells from cytotoxic M phi was found to be dose dependent. In addition, IFN-gamma was more protective than IFN-alpha/beta. The protective effect observed with partially purified IFN was reproduced by using highly purified IFN-alpha/beta or recombinant IFN-gamma. Monoclonal antibodies to IFN-gamma neutralized the protective effect provided by IFN-gamma. These results show that the susceptibility of a tumor cell line to killing by activated M phi can be altered by IFN pretreatment.
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- Recombinant Proteins
- Propionibacterium acnes
- Mice
- Melanoma
- Macrophages
- Macrophage Activation
- Interferons
- Immunology
- Immunity, Cellular
- Cytotoxicity, Immunologic
Citation

Published In
DOI
ISSN
Publication Date
Volume
Issue
Start / End Page
Location
Related Subject Headings
- Recombinant Proteins
- Propionibacterium acnes
- Mice
- Melanoma
- Macrophages
- Macrophage Activation
- Interferons
- Immunology
- Immunity, Cellular
- Cytotoxicity, Immunologic