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Tumor necrosis factor (TNF) and interleukin 1 (IL-1) are both cytokines of macrophage origin with similar activity on several cell types. We investigated whether TNF can, analogously to IL-1, stimulate phospholipase activity of chondrocytes. Addition of each of these cytokines to cells, isolated from the xiphisternum of adult rats, resulted in a time- and dose-dependent increase in phospholipase activity in both secreted and membrane-associated form. Moreover, TNF and IL-1 both induce a transformation of chondrocyte morphology. In conclusion, TNF stimulates chondrocyte phospholipase activity and extends the long list of actions shared by IL-1 and TNF in a diversity of cellular systems.
P Suffys, and
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August 1991,
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P Suffys, and
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P Suffys, and
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P Suffys, and
F Van Roy, and
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Surgery,
