We have demonstrated that recombinant interleukin 1 (IL-1) induces IL-1 alpha and IL-1 beta production by human vascular endothelial cells (EC) in vitro. The effect of IL-1 on EC was dose-dependent and not due to contamination by endotoxin or secondary to the production of tumour necrosis factor (TNF). Thymocyte co-mitogenesis was shown to be due to IL-1 by treating EC supernatants with neutralising antibodies specific for IL-1 alpha and IL-1 beta. Recombinant TNF alpha synergised with IL-1 i...Expand abstract
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Interleukin 1 (IL-1) and tumour necrosis factor synergise in the induction of IL-1 synthesis by human vascular endothelial cells.
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