德尤比基提纳酶JOSD1可以缓解肝脏蛋白毒性
Saheli Chowdhury1, Abhishek Sen1,2, Debajyoti Das1,3
1Division of Cell Biology and Physiology, CSIR-Indian Institute of Chemical Biology, Kolkata, India.
研究人员确定了JOSD1,一种二基化酶 (DUB),可以保护肝细胞免受蛋白质毒性损伤. 通过稳定SOCS1,JOSD1增强了细胞活力并减少了细胞死亡,为肝脏疾病提供了潜在的治疗点.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 肝病学 肝病学是一种肝病学.
背景情况:
- 蛋白质稳定性中断引起的蛋白质毒性是肝损伤的核心原因.
- 蛋白质体功能障碍和抑制剂有助于肝蛋白毒性.
- 识别可以逆转蛋白质毒性损伤的酶对于治疗开发至关重要.
研究的目的:
- 选用于杜比基化酶 (DUBs),以抵消蛋白质酶体抑制剂诱导的肝细胞损伤.
- 研究JOSD1在减轻肝细胞蛋白毒性的作用和机制.
主要方法:
- 在蛋白质体应激下对HepG2细胞进行了96个DUBs的siRNA选.
- 通过初级小鼠肝细胞的功能增益和丧失研究验证了JOSD1的功能.
- 研究了JOSD1与SOCS1的相互作用及其在蛋白质毒性条件下的局部化.
- 评估了JOSD1在活体中对Bortezomib挑战的小鼠肝损伤的影响.
主要成果:
- JOSD1的淘汰会增加亡并降低活力,而它的过度表达会保护细胞.
- 由于JOSD1的保护作用,因此需要其单双化和等离子体膜积累.
- JOSD1对SOCS1进行脱和稳定,这对其肝脏保护作用至关重要.
- 过度表达JOSD1保护小鼠免受波尔特佐米布诱导的肝损伤,而耗尽则加重了肝损伤.
结论:
- 通过稳定SOCS1.1,JOSD1可以减轻肝细胞蛋白毒性.
- 在蛋白质毒性压力下,JOSD1是肝细胞存活的关键调节者.
- JOSD1代表了治疗具有蛋白毒性特征的肝脏疾病的有前途的治疗候选者.
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