ER shaping proteins regulate mitochondrial fission, outer membrane permeabilization and apoptosis

ER shaping proteins regulate mitochondrial fission, outer membrane permeabilization and apoptosis
复制标题

ER 塑造蛋白调节线粒体裂变、外膜透化和细胞凋亡

DOI:
--
复制
发表时间:
2018
期刊:
bioRxiv
影响因子:
--
通讯作者:
S. Varadarajan
S. Varadarajan
中科院分区:
--
文献类型:
--
作者:
M. Milani;G. Cohen;S. Varadarajan

文献摘要

参考文献

被引文献

相似文献

线粒体分裂机制,包括动力蛋白相关的GTdR,DRP-1,是至关重要的线粒体膜动力学的调节。最近的报道表明,内质网(ER)的管状结构标志着线粒体上的收缩位点,以促进DRP-1介导的线粒体分裂。然而,在线粒体收缩和分裂中维持管和片的精细网络的几种ER成形蛋白的作用尚不清楚。在这份报告中,我们证明了关键ER成形蛋白,即Reticulon 1(RTN-1),Reticulon 4(RTN-4),Lunapark-1(LNP-1)和CLIMP-63的表达水平的调节,显着降低了由BH 3模拟物介导的线粒体分裂的程度,尽管没有检测到DRP-1招募到线粒体的变化。此外,ER成形蛋白的调节显著降低了细胞凋亡的其他标志,如线粒体外膜透化、半胱天冬酶活化和磷脂酰丝氨酸外化,并且独立于线粒体嵴重塑发挥作用,从而证明了ER成形蛋白和ER结构完整性对于内源性细胞凋亡途径的有效执行的要求。
The mitochondrial fission machinery, comprising a dynamin-related GTPase, DRP-1, is crucial for the regulation of mitochondrial membrane dynamics. Recent reports suggest that the tubular architecture of the endoplasmic reticulum (ER) marks the constriction sites on the mitochondria to facilitate DRP-1-mediated mitochondrial fission. However, the role of several ER shaping proteins that maintain the elaborate network of tubes and sheets in mitochondrial constriction and fission is not yet known. In this report, we demonstrate that modulation of the expression levels of key ER shaping proteins, namely Reticulon1 (RTN-1), Reticulon 4 (RTN-4), Lunapark-1 (LNP-1) and CLIMP-63, markedly decreased the extent of mitochondrial fission mediated by BH3 mimetics, despite no detectable changes in DRP-1 recruitment to the mitochondria. Furthermore, modulation of ER shaping proteins significantly decreased other hallmarks of apoptosis, such as mitochondrial outer membrane permeabilization, caspase activation and phosphatidylserine externalization, and functioned independently of mitochondrial cristae remodeling, thus demonstrating a requirement of ER shaping proteins and ER structural integrity for the efficient execution of the instrinsic apoptotic pathway.
DOI: 10.1056/nejmoa1513257
发表时间: 2016-01-28
期刊: The New England journal of medicine
影响因子: --
作者:
Roberts AW;Davids MS;Pagel JM;Kahl BS;Puvvada SD;Gerecitano JF;Kipps TJ;Anderson MA;Brown JR;Gressick L;Wong S;Dunbar M;Zhu M;Desai MB;Cerri E;Heitner Enschede S;Humerickhouse RA;Wierda WG;Seymour JF
通讯作者: Seymour JF
DOI: 10.1593/neo.13230
发表时间: 2013-05
期刊: Neoplasia
影响因子: 4.8
作者:
S. Varadarajan;M. Butterworth;Jun Wei;M. Pellecchia;D. Dinsdale;G. Cohen
通讯作者: S. Varadarajan;M. Butterworth;Jun Wei;M. Pellecchia;D. Dinsdale;G. Cohen
DOI: 10.1016/s1534-5807(01)00116-2
发表时间: 2002-01-01
期刊: DEVELOPMENTAL CELL
影响因子: 11.8
作者:
Scorrano, L;Ashiya, M;Korsmeyer, SJ
通讯作者: Korsmeyer, SJ
DOI: 10.1016/s1534-5807(01)00055-7
发表时间: 2001-10-01
期刊: DEVELOPMENTAL CELL
影响因子: 11.8
作者:
Frank, S;Gaume, B;Youle, RJ
通讯作者: Youle, RJ