PMID: 8597871Jan 1, 1995Paper

Fas/Apo-1 activates nuclear factor kappa B and induces interleukin-6 production

Journal of Inflammation
A Rensing-EhlH Engelmann

Abstract

Fas antigen/Apo-1 (Fas) and the p55 tumor necrosis factor receptor (TNF-R) are two related cell surface molecules that induce apoptosis in susceptible cells. With regard to their cytoplasmic homology region, we investigated whether Fas like the TNF-R activates nuclear factor kappa B (NF-kappa B), using human SV80 fibroblasts transfected with the cDNA encoding human Fas. In this cell line Fas mobilizes the p50/p65 heterodimeric form of NF-kappa B and induces interleukin-6 (IL-6) production. Compared to NF-kappa B activation via the TNF-R differences in kinetics and signal intensity were observed. Peak activation occurred 2 hr after Fas compared to 1 hr after TNF-R stimulation. Furthermore, when equitoxic concentrations of anti-Fas antibody and TNF were applied, TNF triggered a stronger NF-kappa B response. Studies using inhibitors of signal transduction suggest that both receptors mediate NF-kappa B activation via similar routes: D609, an inhibitor of the phospatidylcholine-specific phospholipase C, had an inhibitory effect, while the protein kinase C inhibitor staurosporine had an enhancing effect on both Fas and TNF-R induced NF-kappa B mobilization. Interestingly, D609 had no influence on Fas and TNF-R mediated cytotoxicity a...Continue Reading

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