| Literature DB >> 10894163 |
W C Yeh1, A Itie, A J Elia, M Ng, H B Shu, A Wakeham, C Mirtsos, N Suzuki, M Bonnard, D V Goeddel, T W Mak.
Abstract
Casper (c-FLIP) associates with FADD and caspase-8 in signaling complexes downstream of death receptors like Fas. We generated Casper-deficient mice and cells and noted a duality in the physiological functions of this molecule. casper-/- embryos do not survive past day 10.5 of embryogenesis and exhibit impaired heart development. This phenotype is reminiscent of that reported for FADD-/- and caspase-8-/- embryos. However, unlike FADD-/- and caspase-8-/- cells, casper-/- embryonic fibroblasts are highly sensitive to FasL- or TNF-induced apoptosis and show rapid induction of caspase activities. NF-kappaB and JNK/SAPK activation is intact in TNF-stimulated casper-/- cells. These results suggest that Casper has two distinct roles: to cooperate with FADD and caspase-8 during embryonic development and to mediate cytoprotection against death factor-induced apoptosis.Entities:
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Year: 2000 PMID: 10894163 DOI: 10.1016/s1074-7613(00)80214-9
Source DB: PubMed Journal: Immunity ISSN: 1074-7613 Impact factor: 31.745