维生素D受体通过调节ACLY/Nrf2/Keap1通路来缓解糖尿病病中的脂质过氧化
Yueyi Zhou1,2, Qin Liao3, Dan Li1,2
1Department of Nephrology, The Third Xiangya Hospital, Central South University, Changsha, Hunan, China.
概括
维生素D受体 (VDR) 通过控制脂质过氧化,减少糖尿病病的损伤. VDR通过转录下调ATP-酸酶 (ACLY) 来实现这一目标,这会影响Nrf2/Keap1通路.
科学领域:
- 腎臟病學 (nephrology) 是一種醫學專業.
- 内分泌学 在内分泌学.
- 分子生物学分子生物学
背景情况:
- 糖尿病病 (DN) 涉及脂质过氧化,这是一个关键的膜损伤过程.
- 维生素D受体 (VDR) 调节DN中的自,但其在脂质过氧化中的作用尚不清楚.
- 需要调查ATP-酸酶 (ACLY) /Nrf2/Keap1通路与VDR在DN脂质过氧化中的参与.
研究的目的:
- 研究VDR-ACLY-Nrf2/Keap1轴在调节糖尿病病中的脂质过氧化中的作用.
- 为了确定VDR是否负面调节ACLY表达及其对氧化应激和损伤的下游影响.
主要方法:
- 使用了一种糖尿病病小鼠模型,具有VDR淘汰和过度表达.
- 采用了使用VDR激动剂 (paricalcitol) 和ACLY操纵的细胞实验.
- 使用ChIP-qPCR和双光酶测定验证了转录调节.
- 评估了脂质过氧化标志物 (MDA,4-HNE),ROS产量和Nrf2/Keap1通路活性.
主要成果:
- VDR淘汰会加剧DN诱导的线粒体损伤,增加ACLY,ROS和脂质过氧化 (MDA,4-HNE),并减少Nrf2/Keap1.1.
- VDR过度表达和帕里卡尔西托尔治疗减少了这些有害影响.
- 在AGE模型中,帕里卡尔西托尔降低了ACLY和ROS,这一效应因ACLY过度表达而部分逆转.
- ACLY 降解降低了脂质过氧化和ROS,而 Nrf2 抑制部分削弱了这种保护作用.
结论:
- VDR通过转录向下调节ACLY,从而调节Nrf2/Keap1系统.
- 这种VDR-ACLY-Nrf2/Keap1相互作用调节脂质过氧化,并减轻糖尿病病中的损伤.
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