Effect of interleukin 2, interferon-gamma, and mitogens on the production of tumor necrosis factors alpha and beta - PubMed (original) (raw)
. 1985 Oct;135(4):2492-7.
- PMID: 3928750
Effect of interleukin 2, interferon-gamma, and mitogens on the production of tumor necrosis factors alpha and beta
G E Nedwin et al. J Immunol. 1985 Oct.
Abstract
Human peripheral blood mononuclear cells (PBMC) were induced by recombinant interleukin 2 and mitogens to secrete two distinct cytotoxic polypeptides, tumor necrosis factor-alpha (TNF-alpha) and tumor necrosis factor-beta (TNF-beta), previously called lymphotoxin. Treatment of PBMC with recombinant human interleukin 2 (rIL 2) or mitogens in combination with recombinant human interferon-gamma (rIFN-gamma) resulted in augmented production of both TNF-alpha and TNF-beta. rIFN-gamma alone had no effect on production of either cytotoxic polypeptide. TNF-alpha was produced within 2 to 3 hr after induction and was the major cytotoxin produced by PBMC during the first 48 hr of culture, after which time TNF-beta became the predominant species. TNF-beta was first secreted into the media after 8 hr of induction. Enhanced levels of both TNF-alpha and TNF-beta were seen when the PBMC were separated into adherent and nonadherent cells. Both TNF-alpha and TNF-beta were induced in different tumor cell lines of hematopoietic origin. The results demonstrate that the production of TNF-alpha and TNF-beta can be enhanced by two lymphokines, IL 2 and IFN-gamma.
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