诺托金森化物R1通过维护线粒体平衡来减轻H/R损伤在H9c2细胞中
Yuanbo Xu1, Piao Wang1, Ting Hu1
1School of Integrative Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
Current issues in molecular biology
|January 24, 2025
概括
诺托金化物R1通过维护线粒体健康,保护心脏细胞免受损伤. 它平衡线粒体裂变和融合,增强能量生产,并减少有害的氧化应激.
科学领域:
- 心血管科学 心血管科学
- 细胞生物学 细胞生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 线粒体平衡对于细胞能量和预防氧化应激至关重要.
- 线粒体损伤是心肌缺血再输液损伤 (MIRI) 的关键因素.
- 诺托金化物R1 (NGR1) 显示出缓解MIRI的潜力,但其机制需要澄清.
研究的目的:
- 研究NGR1在受到低氧/低氧化 (H/R) 的H9c2细胞中保持线粒体平衡的机制.
- 了解NGR1在缓解H/R诱导的细胞损伤和功能障碍方面的作用.
主要方法:
- 在暴露于H/R条件之前,H9c2细胞被NGR1预处理.
- 评估了细胞活力,乳酸脱酶 (LDH) 泄漏,以及线粒体参数 (结构,mPTP,Δψm).
- 测量了ATP水平,线粒体呼吸链复合物的活性,线粒体ROS的产生,以及与线粒体生物发生,裂变,融合和线粒体衰变相关的蛋白质的表达.
主要成果:
- NGR1预处理显著改善了H9c2细胞存活率,减少了LDH泄漏,并缓解了H/R后的细胞损伤.
- NGR1保护了线粒体结构,防止了mPTP开放和Δψm脱极化,并增强了ATP生产和呼吸链复杂活性.
- NGR1降低了线粒激素,上调了线粒体生物发生和融合蛋白 (PGC-1α,Nrf1,Nrf2,Opa1,Mfn1/2),下调了裂变蛋白 (Fis1,Drp1) 和线粒细胞衰变标志物 (Pink1,Parkin,BNIP3).
结论:
- 通过维持线粒体平衡,NGR1有效地保护心肌细胞免受H/R损伤.
- NGR1通过调节线粒细胞衰变,调节线粒体裂变-融合动态,促进线粒体生物发生来实现这种保护.
- 这些发现凸显了NGR1作为MIRI的潜在治疗剂.
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