在内皮细胞中RNA结合蛋白GIGYF2的异常过度表达调节了血管衰老和功能
Fanglin Niu1, Zhuozhuo Li1, Yuanyuan Ren1
1Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Faculty of Life Sciences and Medicine, School of Medicine, Northwest University, Xi'an, Shaanxi, 710069, PR China.
Redox biology
|July 30, 2023
概括
与 Grb10 相互作用的 GYF 蛋白 2 (GIGYF2) 通过增强 STAU1 mRNA 稳定性,激活 mTORC1 信号,并促进内皮细胞衰老来驱动血管衰老. 准这种GIGYF2-STAU1-mTORC1通路为心血管疾病提供了潜在的治疗方法.
科学领域:
- 分子生物学分子生物学
- 心血管研究研究心血管研究
- 生物老龄化 生物老龄化
背景情况:
- 血管内皮细胞 (EC) 衰老有助于血管衰老和心血管疾病.
- 与Grb10相互作用的GYF蛋白2 (GIGYF2) 在EC衰老和功能障碍中的作用尚不清楚.
- GIGYF2突变与与衰老相关的疾病有关.
研究的目的:
- 研究GIGYF2在调节内皮细胞衰老和血管衰老中的作用.
- 阐明GIGYF2介导的内皮功能障碍背后的分子机制.
- 探索GIGYF2作为血管衰老的潜在治疗点.
主要方法:
- 在衰老的EC和老老的小鼠大动脉中分析GIGYF2表达.
- 在人类EC中,GIGYF2沉默和过度表达.
- 对内皮功能,衰老标志物和信号通路 (mTORC1-S6K1) 的评估.
- 转录组分析以识别相互作用蛋白 (STAU1).
- RNA结合蛋白质测定和mRNA稳定性研究.
- 使用GIGYF2条件淘汰赛小鼠进行体内研究.
主要成果:
- 在衰老的EC和老鼠大动脉中,GIGYF2被上调.
- GIGYF2沉默改善了EC衰老和功能障碍;过度表达促进了它们.
- GIGYF2 增强了 STAU1 mRNA 的稳定性,提高了 LAMTOR4 的表达.
- GIGYF2通过溶酶体招募激活mTORC1-S6K1通路.
- 缺乏GIGYF2可以保护老年小鼠免受血管衰老的现象.
结论:
- GIGYF2作为一种RNA结合蛋白,稳定了STAU1mRNA,导致LAMTOR4上调.
- 这种级联激活mTORC1信号,促进EC衰老,功能障碍和血管衰老.
- GIGYF2-STAU1-mTORC1通路是血管衰老的关键调节者.
- 准这种途径为与年龄有关的心血管疾病提供了一个有前途的治疗策略.
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