通过PDK4介导的Nrf2无活化有助于氧化应激和糖尿病损伤
Shasha Tian1, Xiaopeng Yang1, Yao Lin1
1NHC Key Laboratory of Hormones and Development, Chu Hsien-I Memorial Hospital and Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300134, China; Tianjin Key Laboratory of Metabolic Diseases, Tianjin Medical University, Tianjin 300134, China.
Cellular signalling
|July 6, 2024
概括
酸盐脱酶激酶4 (PDK4) 通过破坏氧化还原平衡驱动糖尿病病 (DKD). 抑制PDK4可以恢复主抗氧化剂Nrf2,为DKD提供潜在的治疗策略.
科学领域:
- 腎臟病學 (nephrology) 是一種醫學.
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 糖尿病病 (DKD) 的特点是氧化还原失衡.
- 酸盐脱酶激酶4 (PDK4) 在DKD病变发生过程中起着关键作用.
- 连接PDK4与DKD的确切机制尚不清楚.
研究的目的:
- 通过氧化还原调节的透视来研究PDK4在DKD中的作用.
- 阐明PDK4通过哪些分子机制影响DKD中的氧化还原稳态.
主要方法:
- 利用暴露在高葡萄糖和棕酸 (HGL) 的人类近端管状 (HK-2) 细胞来建模DKD.
- 研究了PDK4对凯尔奇类ECH相关蛋白1 (Keap1) 和核因子红色素2相关因子2 (Nrf2) 途径的影响.
- 在细胞和小鼠模型中使用了PDK4的药理抑制和遗传淘汰.
- 评估了抗氧化酶,铁灭抑制剂和铁代谢的变化.
主要成果:
- 在HK-2细胞中由HGL诱导的氧化应激.
- 通过自抑制,PDK4通过PDK4上调Keap1,导致HGL治疗细胞中的Nrf2耗尽.
- 抑制PDK4或敲击恢复了Nrf2,增加了抗氧化剂和抑制铁灭的酶.
- PDK4调节改善了铁代谢,减少了氧化应激和脂质过氧化在体外和体内 (DKD小鼠).
结论:
- PDK4是DKD中氧化还原失调的关键媒介.
- 向PDK4可以增强Nrf2抗氧化途径并减轻DKD的进展.
- PDK4代表了治疗糖尿病病的潜在治疗标.
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