Interferon-γ synergizes with tumor necrosis factor and with interleukin 1 and requires the presence of both monokines to induce antitumor cytotoxic activity in macrophages

L. Chen, Y. Suzuki, E. F. Wheelock

Research output: Contribution to journalArticle

Abstract

Small concentrations of recombinant murine interferon-γ (MuIFN-γ), recombinant human interleukin 1 (HuIL-1), and recombinant murine tumor necrosis factor (MuTNF), added separately to cultures of thioglycolate-elicited peritoneal macrophages, produced no cytotoxic activity against L5178Y cells, a tumor cell line which is resistant to the direct toxic effects of these cytokines, either alone or in combination. However, small concentrations of MuIFN-γ when combined with small concentrations of either HuIL-1 or MuTNF activated these macrophages to produce cytotoxic effects against L5178Y cells; small concentrations of HuIL-1 and MuTNF in combination had no macrophage activating activity. Specific antibody to MuTNF blocked the macrophage-activating synergistic effects of MuIFN-γ + HuIL-1, and specific antibody to HuIL-1 blocked the macrophage-activating activity of MuIFN-γ + MuTNF, indicating that MuTNF was induced in macrophage cultures treated with MuIFN-γ + HuIL-1, and that murine IL-1 was induced in macrophage cultures treated with MuIFN-γ + MuTNF. These results indicate that all three cytokines are required for induction of antitumor cytotoxic activation of macrophages. Experiments with a concentration of MuIFN-γ which alone could active macrophages revealed that both MuTNF and murine IL-1 were required for this activation. The demonstration that small concentrations of these three cytokines can act synergistically, but not separately, to activate macrophages indicates the importance of cytokine combinations in immunoregulation and in anti-tumor cell-mediated immune responses.

Original languageEnglish (US)
Pages (from-to)4096-4101
Number of pages6
JournalJournal of Immunology
Volume139
Issue number12
StatePublished - 1987
Externally publishedYes

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Monokines
Interleukin-1
Interferons
Tumor Necrosis Factor-alpha
Macrophages
Cytokines
Thioglycolates
Macrophage Activation
Antibodies
Poisons
Peritoneal Macrophages
Tumor Cell Line

ASJC Scopus subject areas

  • Immunology

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Interferon-γ synergizes with tumor necrosis factor and with interleukin 1 and requires the presence of both monokines to induce antitumor cytotoxic activity in macrophages. / Chen, L.; Suzuki, Y.; Wheelock, E. F.

In: Journal of Immunology, Vol. 139, No. 12, 1987, p. 4096-4101.

Research output: Contribution to journalArticle

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