渐进性超核麻PERK单体B选择性地转化DLX1促进tau的毒性
Christian B Lessard1,2,3, Diego Rubio Rubio1,2,3, Samantha Tolton4
1Center for Translational Research in Neurodegenerative Disease, College of Medicine, University of Florida, Gainesville, FL 32610, USA.
概括
PERK-B基因变异增加了渐进性超核性 (PSP) 的风险,允许DLX1基因的翻译,这驱动了tau病理. 减少DLX1降低了tau的毒性,为PSP提供了新的治疗点.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 渐进性超核性麻 (PSP) 是一种没有有效治疗的病.
- PERK基因有两种类型,A和B,PERK-B与增加PSP风险有关.
- 连接PERK-B与陶病的机制尚不清楚.
研究的目的:
- 为了比较PERK-A和PERK-B之间的功能差异.
- 确定PERK-B对病有所贡献的机制.
- 探索PSP病变发生过程中的PERK-B/DLX1通路.
主要方法:
- 开发了用于PERK-A和PERK-B比较的受控细胞模型.
- 利用基于胺素的蛋白质组学来分析mRNA翻译.
- 在人类PSP脑组织中检查DLX1溶解度.
- 沉默了DLX1的同类物,以评估tau的毒性.
主要成果:
- PERK-A和PERK-B显示出几乎无法区分的未折叠蛋白质响应 (UPR) 功能.
- 在UPR.下,PERK-B允许特定mRNA的翻译,包括DLX1.
- 在PSP大脑中,DLX1积聚在不溶于洗剂的微分中.
- 静音DLX1在体内减少了陶诱导的毒性.
结论:
- 确定了一种新的PERK-B/DLX1通路,导致tau病理.
- DLX1是PERK-B对PSP贡献的一个关键调解者.
- 这一途径代表了PSP和相关病的潜在治疗标.
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