The integrated stress response contributes to tRNA synthetase-associated peripheral neuropathy.
The integrated stress response contributes to tRNA synthetase-associated peripheral neuropathy.
复制标题
整合的应激反应有助于tRNA合成酶相关的周围神经病变。
DOI:
10.1126/science.abb3414
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发表时间:
2021-09-03
期刊:
影响因子:
--
通讯作者:
Burgess RW
中科院分区:
文献类型:
--
作者:
Spaulding EL;Hines TJ;Bais P;Tadenev ALD;Schneider R;Jewett D;Pattavina B;Pratt SL;Morelli KH;Stum MG;Hill DP;Gobet C;Pipis M;Reilly MM;Jennings MJ;Horvath R;Bai Y;Shy ME;Alvarez-Castelao B;Schuman EM;Bogdanik LP;Storkebaum E;Burgess RW
Dominant mutations in ubiquitously-expressed tRNA synthetase genes cause axonal peripheral neuropathy, accounting for at least six forms of Charcot-Marie-Tooth (CMT) disease. Genetic evidence in mouse and Drosophila models suggests a gain-of-function mechanism. Here, we used in vivo, cell-type-specific transcriptional and translational profiling to show that mutant tRNA synthetases activate the integrated stress response (ISR) through the sensor kinase GCN2. The chronic activation of the ISR contributed to the pathophysiology, and genetic deletion or pharmacological inhibition of Gcn2 alleviated the peripheral neuropathy. The activation of GCN2 by tRNA synthetase mutations suggests that their activity is still related to translation and that inhibiting GCN2 or the ISR may represent a therapeutic strategy in CMT. Activation of GCN2 and the integrated stress response contributes to mutant tRNA synthetase-associated neurodegeneration.
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