作者: Wulf Schneider-Brachert , Vladimir Tchikov , Jens Neumeyer , Marten Jakob , Supandi Winoto-Morbach
DOI: 10.1016/J.IMMUNI.2004.08.017
关键词: Endocytosis 、 Signal transduction 、 Endosome 、 FADD 、 Tumor Necrosis Factor Decoy Receptors 、 Endocytic vesicle 、 Internalization 、 Biology 、 Cell biology 、 TRADD
摘要: The molecular regulation of the recruitment initial signaling complexes at TNF-R1 is poorly defined. We demonstrate here that within minutes internalized (TNF receptosomes) recruits TRADD, FADD, and caspase-8 to establish "death-inducing complex" (DISC). In addition, we identified internalization domain (TRID) required for receptor endocytosis provide evidence internalization, DISC formation, apoptosis are inseparable events. Analyzing cell lines expressing an internalization-deficient (TNF-R1 DeltaTRID) revealed RIP-1 TRAF-2 occurred level plasma membrane. contrast, aggregation TNF-R1-associated critically dependent on endocytosis. Furthermore, fusion TNF receptosomes with trans-Golgi vesicles results in activation acid sphingomyelinase cathepsin D. Thus, different pathways by compartmentalization membrane-derived endocytic harboring DISC.