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DHA通过抑制DRP1-介导的线粒体裂变来缓解高葡萄糖诱导的Oreochromis niloticus中的线粒体功能障碍
Hui-Chao Shen1, Zhi-Qiang Chen1, Fang Chen1
1College of Marine Sciences, South China Agricultural University, No.483 Wushan Road, Guangzhou 510642, China.
International journal of biological macromolecules
|June 16, 2023
概括
鱼中的胺相关蛋白1 (DRP1) 在葡萄糖平衡中起作用. 多可萨赫萨酸 (DHA) 通过抑制DRP1介导的线粒体裂变来减轻高葡萄糖的影响.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 水生动物生理学 水生动物生理学
背景情况:
- 动氨酸相关蛋白1 (DRP1) 对于哺乳动物的葡萄糖平衡至关重要.
- 它在水生动物,特别是鱼类中的作用尚不清楚.
- 这项研究侧重于尼罗河鱼 (Oreochromis niloticus) 中的DRP1.
研究的目的:
- 在Oreochromis niloticus中对DRP1进行表征.
- 研究DRP1在鱼肝细胞的葡萄糖代谢和线粒体动态中的作用.
- 探索多可萨赫萨酸 (DHA) 对高葡萄糖诱导的线粒体功能障碍的潜在保护作用.
主要方法:
- 在Oreochromis niloticus中克隆和描述DRP1的基因.
- 在不同的饮食和葡萄糖条件下分析DRP1组织分布和mRNA表达.
- 在体外研究中,使用小白肝细胞来评估DRP1过度表达,高葡萄糖和DHA对线粒体丰富度,基因表达 (TFAM,MFN1,MFN2) 和酶活性 (复合II,III) 的影响.
主要成果:
- 提拉皮亚DRP1编码了一个673-氨基酸,具有保存的GTPase域.
- DRP1转录被广泛分布,在大脑中最高水平.
- 高碳水化合物食和葡萄糖的管理上调肝脏DRP1表达.
- DRP1过度表达减少了肝细胞中的线粒体丰度.
- DHA治疗通过增加线粒体丰度和相关基因表达来抵消高葡萄糖诱导的线粒体功能障碍,同时抑制DRP1,MFF和FIS表达.
结论:
- 奥里奥克罗米斯尼洛蒂克斯DRP1高度保存,并参与葡萄糖调节.
- 在高葡萄糖条件下,DRP1有助于线粒体分裂和功能障碍.
- DHA可以通过抑制DRP1-介导的线粒体裂变来缓解鱼类中高葡萄糖诱导的线粒体损伤.
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