通过调节线粒体裂变和氧化应激,S100A9抑制可以改善HFpEF
Moran Wang1, Bowen Ren2, Xiaofan Wu2
1Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China; Department of Geriatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, China; Key Laboratory of Vascular Aging, Ministry of Education, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, China.
保存喷射分数 (HFpEF) 的心力衰竭涉及S100A9驱动线粒体问题. 在HFpEF模型中,抑制S100A9及其通路 (SPI1/PDK4) 改善心脏功能并减少氧化应激.
科学领域:
- 心血管生物学 心血管生物学
- 线粒体医学 线粒体医学
- 炎症和免疫学 炎症和免疫学
背景情况:
- 保存喷射分数 (HFpEF) 的心力衰竭呈现透析功能障碍和心肌硬,由于对分子驱动因素的了解不足,治疗选择有限.
- 线粒体动力学和氧化应激与HFpEF的病原发生有关,但具体的分子调节者仍然不清楚.
研究的目的:
- 在HFpEF的背景下,研究炎症调解者S100A9在调节线粒体动态中的作用.
- 阐明S100A9在HFpEF中影响心脏功能和氧化应激的分子机制.
主要方法:
- 使用"双击" (高脂肪饮食+L-NAME) 和db/db小鼠模型的HFpEF.
- 用Paquinimod (PAQ) 抑制S100A9;用RAW 264.7巨细胞和AC16心肌细胞进行了体外研究;进行了转录组分析.
- 研究了S100A9/SPI1/PDK4轴和线粒体裂变/融合标记 (p-Drp1,Fis1);评估了心脏功能,过度缩小,氧化应激和ATP水平.
主要成果:
- 在HFpEF小鼠模型中,S100A9显著升高,与腹功能障碍,心脏缩和氧化应激相关.
- 通过PAQ抑制S100A9改善了透缩功能,减少了缩,降低了巨细胞透和M1极化.
- 通过SPI1/PDK4轴,S100A9促进心肌细胞中的线粒体裂变,增加氧化应激;PAQ或PDK4/SPI1沉默逆转了这些效应.
结论:
- 通过S100A9/SPI1/PDK4通路促进线粒体功能障碍,S100A9在HFpEF中发挥着关键作用.
- 向S100A9代表了对HFpEF的有希望的治疗策略,解决线粒体分裂和氧化应激.
- 对S100A9/SPI1/PDK4轴的调制为改善HFpEF中透缩功能提供了潜在的途径.
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