缺少Rheb1会引起线粒体功能障碍,并通过促进Atp5f1c乙化来加速皮细胞衰老
Qingmiao Lu1, Xiao Hu2, Qing Hou3
1Department of Endocrinology, 2(nd) Affiliated Hospital, Nanjing Medical University, 121 Jiangjiayuan, Nanjing, Jiangsu, China.
Cellular signalling
|October 10, 2024
概括
缺少Rheb1会通过损害线粒体功能来加速皮质细胞衰老和病,这种功能独立于mTORC1的信号传递. 这一发现为糖尿病病 (DKD) 提供了新的治疗点.
科学领域:
- 腎臟病學 (nephrology) 是一種醫學.
- 细胞生物学 细胞生物学
- 线粒体生物学 线粒体生物学
背景情况:
- 足细胞衰老有助于糖尿病病 (DKD) 的持续损伤和白蛋白尿.
- 在DKD中驱动Podocyte衰老的潜在机制在很大程度上是未知的.
- 需要阐明Rheb1在细胞衰老和DKD病变发生中的作用.
研究的目的:
- 研究Rheb1在糖尿病病 (DKD) 中的 podocyte 衰老和损伤中的作用.
- 阐明Rheb1影响细胞衰老的分子机制,特别是与线粒体功能和mTORC1信号的关系.
主要方法:
- 来自DKD患者和小鼠的受体细胞的免疫组织化学染色.
- 在活体和体外,在细胞中对Rheb1进行基因操纵 (敲击和敲击).
- 评估线粒体功能,包括ATP水平,膜潜力,呼吸链复合体和反应性氧物种 (ROS) 生产.
- 对酸盐脱酶 (PDH) 酸化和Atp5f1c乙化的分析.
主要成果:
- 在糖尿病小鼠中,Rheb1淘汰会加剧细胞衰老和损伤.
- 在mTORC1.1的独立性下,Rheb1倒置加速了 podocyte 衰老.
- 缺少Rheb1导致线粒体功能障碍,其特征是ATP减少,膜潜力受损,呼吸链组件改变,ROS增加和PDH酸化增强.
- 在高葡萄糖条件下,Rheb1与Atp5f1c相互作用并调节其乙化.
结论:
- 由于引发线粒体功能障碍,Rheb1缺乏会加剧DKD中的细胞衰老和损伤.
- Rheb1通过Atp5f1c乙化调节细胞衰老,独立于mTORC1通路.
- 针对Rheb1介导的线粒体功能障碍为DKD提供了潜在的治疗策略.
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