Fn14和TNFR2作为细胞毒性TNFR1信号传递的调节剂
Daniela Siegmund1, Olena Zaitseva1, Harald Wajant1
1Division of Molecular Internal Medicine, Department of Internal Medicine II, University Hospital Würzburg, Würzburg, Germany.
瘤缩因子受体2 (TNFR2) 和纤维细胞生长因子诱导14 (Fn14) 抑制TNFR1诱导的细胞死亡. 这通过耗尽TRAF2和cIAP1/2而发生,影响NFκB激活,亡和亡.
科学领域:
- 分子生物学分子生物学
- 细胞信号传递 细胞信号传递
- 免疫学 免疫学 免疫学
背景情况:
- 瘤亡因子受体超级家族 (TNFRSF) 的成员,包括TNFR1,TNFR2和Fn14,在细胞信号传递中发挥着关键作用.
- TNFR1通过细胞质复合体启动细胞死亡信号,与其他形成等离子体膜相关复合体的死亡受体不同.
- 亡和亡的平衡是由关键信号分子调节的,包括caspase-8,FLIP,TRAF2,RIPK1和cIAP1/2.2.
研究的目的:
- 阐明TNFR2和Fn14参与影响TNFR1-介导信号通路的分子机制.
- 研究TNFR2和Fn14信号如何影响TRAF2和cIAP1/2的可用性,这对TNFR1诱导的细胞死亡至关重要.
- 讨论TNFR1信号传导的TNFR2和Fn14介导调制的体内后果.
主要方法:
- 对TNFRSF信号通路的现有文献的审查.
- 对TNFR1,TNFR2,Fn14,TRAF2,RIPK1,cIAP1/2和caspase-8之间的分子相互作用进行分析.
- 讨论与这些相互作用相关的细胞和体内实验发现.
主要成果:
- TNFR2和Fn14有效地招募TRAF2及其有约束力的合作伙伴cIAP1和cIAP2.
- 这种TNFR2和Fn14的招聘限制了TRAF2/cIAP1/2的可用性,用于TNFR1信号.
- 激活TNFR2或Fn14可抑制TNFR1诱导的RIPK1媒介作用,包括NFκB激活,亡和亡.
结论:
- 通过调节关键信号适配器的可用性,TNFR2和Fn14作为TNFR1诱导的细胞死亡信号的负调节剂.
- TNFR1,TNFR2和Fn14信号之间的相互作用对于控制细胞命运决策至关重要,包括细胞亡和亡.
- 了解这些分子相互作用,可以了解体内TNF诱导的生物反应的复杂调节.
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