在再注射时服用β-基酸盐可以减少心脏病发作的大小,并通过自性改善线粒体功能来维持心脏功能,这在雄性小鼠中是可行的
Yuxin Chu1, Yutao Hua2, Lihao He2
1National Key Laboratory for Innovation and Transformation of Luobing Theory, The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, Department of Cardiology, Qilu Hospital of Shandong University, Jinan, China; Department of Medicine, Division of Cardiovascular Disease, University of Alabama at Birmingham, Birmingham, AL 35233, USA.
Journal of molecular and cellular cardiology
|November 18, 2023
概括
单剂量β-基酸盐 (β-OHB) 在再注射时给予,可显著降低心脏病发作心脏病发作的大小,并通过激活自和维护线粒体健康来保持心脏功能. 这种体显示出对ST升高心肌梗塞 (STEMI) 患者的治疗潜力.
科学领域:
- 心血管科学 心血管科学
- 代谢医学是一种代谢医学.
- 分子生物学分子生物学
背景情况:
- 缺血/再输血 (I/R) 损伤显著导致心脏病发作大小和心力衰竭后再血管,缺乏有效的临床治疗.
- β-基酸盐 (β-OHB) 是一种体,因其作为能量来源和信号分子的双重作用而闻名,之前的研究表明,当预防性地使用时,可以提供心脏保护.
- 在ST升高心肌梗塞 (STEMI) 患者的缺血期间观察到血β-OHB水平升高,尽管在重血管化后水平下降,不足以保护心肌.
研究的目的:
- 为了研究一次β-基酸盐 (β-OHB) 剂量在再注射时在减轻缺血/再注射 (I/R) 损伤时的有效性.
- 在I / R损伤的背景下,阐明负责β-OHB心脏保护作用的潜在分子机制.
- 评估β-OHB作为减少STEMI患者心脏病发作大小的治疗干预措施的潜力.
主要方法:
- 在体内对小鼠进行I/R的研究,将反注射时的β-OHB治疗与盐水对照进行比较,评估心脏病发作的大小,心脏功能,自和线粒体DNA (mtDNA) 水平.
- 在体外研究中,使用暴露于I/R条件的新生小鼠心室肌细胞 (NRVM),评估细胞死亡,自,线粒体参数和反应性氧物种 (ROS) 水平.
- 在体外和体外模型中进行基因操纵 (ATG7淘汰/淘汰),以确定自对于β-OHB的保护作用的必要性.
- 机械路径的分析,包括哺乳动物的目标拉巴胺素 (mTOR) 信号传递,作为对β-OHB治疗的反应.
主要成果:
- 在再注射时给予β-OHB,小鼠的心脏病发作大小减少了50%,心脏功能得到保护.
- 在体内,β-OHB治疗激活了自和保持了心脏病边界区域的mtDNA水平.
- 在NRVM中,β-OHB降低了细胞死亡,增强了自,维持了线粒体的完整性和功能,并降低了ROS水平.
- 缺乏ATG7取消了β-OHB的心脏保护作用,证实了自的关键作用.
- 给予β-OHB与mTOR信号抑制有关.
结论:
- 一次剂量的β-基酸盐 (β-OHB) 在再注射时被有效地减少了心脏病发作的大小并保持了心脏功能.
- 心脏保护机制包括自流的激活,可能通过mTOR抑制,以及维护线粒体平衡.
- β-OHB显示出作为一种安全和可行的治疗策略,以限制STEMI患者的心肌损伤的潜力,基于其在心力衰竭患者中已建立的安全概况.
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