CASP8 活性被抑制
中文名称
通路描述
由外源性刺激通过死亡受体或 Toll 样受体(如 TLR3, TLR4)触发的细胞死亡可能导致细胞凋亡或调节性坏死(焦亡)(Holler N 等。2000; Kalai M 等。2002; Kaiser WJ 和 Offermann MK 2005; Yang P 等。2007)。Caspase-8(CASP8)是一种半胱氨酸蛋白酶,作为决定细胞死亡形式的关键介质(Kalai M 等。2002)。在人和小鼠细胞中,完全加工形成的异四聚体形式 CASP8 的蛋白酶活性对于促凋亡信号传导以及 RIPK1 和 RIPK3 的切割是必需的,同时防止 RIPK1/RIPK3 介导的调节性坏死(Juo P 等。1998; Lin Y 等。1999; Holler N 等。2000; Hopkins-Donaldson S 等。2000)。在存在 caspase 抑制剂(如 Z-VAD-FMK,泛 caspase 抑制剂)、内源性 FLIP(S) 或病毒 FLIP 样蛋白的情况下,CASP8 活性的阻断被发现将信号转变为坏死性细胞死亡(Thome M 等。1997; Kalai M 等。2002; Feoktistova M 等。2011; Sawai H 2013)。
英文描述
CASP8 activity is inhibited Cell death triggered by extrinsic stimuli via death receptors or toll-like receptors (e.g., TLR3, TLR4) may result in either apoptosis or regulated necrosis (necroptosis) (Holler N et al. 2000; Kalai M et al. 2002; Kaiser WJ and Offermann MK 2005; Yang P et al. 2007). Caspase-8 (CASP8) is a cysteine protease, which functions as a key mediator for determining which form of cell death will occur (Kalai M et al. 2002). The proteolytic activity of a fully processed, heterotetrameric form of CASP8 in human and rodent cells is required for proapoptotic signaling and also for a cleavage of kinases RIPK1 and RIPK3, while at the same time preventing RIPK1/RIPK3-dependent regulated necrosis (Juo P et al. 1998; Lin Y et al. 1999; Holler N et al. 2000; Hopkins-Donaldson S et al. 2000). A blockage of CASP8 activity in the presence of caspase inhibitors such as Z-VAD-FMK (pan-caspase inhibitor), endogenous FLIP(S) or viral FLIP-like protein was found to switch signaling to necrotic cell death (Thome M et al. 1997; Kalai M et al. 2002; Feoktistova M et al. 2011; Sawai H 2013).
所含基因
11 个基因