Drp1-依赖性线粒体自对压力过度诱导的线粒体功能障碍和心力衰竭起着保护作用
Akihiro Shirakabe1, Peiyong Zhai1, Yoshiyuki Ikeda1
1From Department of Cell Biology and Molecular Medicine, Rutgers-New Jersey Medical School, Newark (A.S., P.Z., Y.I., T.S., Y.M., J.S.); Department of Cardiovascular Medicine and Hypertension, Graduate School of Medical and Dental Science, Kagoshima University, Japan (Y.I.); Department of Medicine and Bioregulatory Science, Kyushu University, Fukuoka, Japan (M.N.); Division of Cardiovascular Surgery, Department of Surgery, Veterans General Hospital, National Yang-Ming University School of Medicine, Taiwan (C.-P.H.); Department of Cardiovascular Medicine, Kyushu University Hospital, Fukuoka, Japan (K.E.); Department of Cardiovascular Research, Development, and Translational Medicine, Graduate School of Medical Science, Kyushu University Hospital, Fukuoka, Japan (K.E.); and Center for Autophagy Research, Department of Internal Medicine, and Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas (B.L.).
线粒体自是暂时激活,然后在心力衰竭下调节. 它的下调驱动心脏功能障碍, 但恢复线粒体自可以改善压力过载的结果.
科学领域:
- 心脏病学
- 细胞生物学
- 分子医学
背景情况:
- 线粒体自对于心肌细胞质量控制至关重要.
- 它在心脏缩中的作用尚不清楚.
研究的目的:
- 研究线粒体自在心脏缩和心力衰竭中的作用和意义.
- 探索调节线粒体自的治疗潜力.
主要方法:
- 在小鼠中进行横向大动脉收缩 (TAC),以诱导心脏缩.
- 使用电子显微镜和特定标记物进行了线粒体自的评估.
- 分析了drp1和beclin1基因表达和功能.
- 使用Tat-Beclin进行了自的药理诱导.
主要成果:
- 导致心脏缩,喷射率降低和心力衰竭.
- 在TAC后 (3-7天) 线粒体自被暂时激活,但随后下调.
- Drp1 缺乏消除了线粒体自和恶化心脏功能障碍.
- 塔特-贝克林1部分恢复了线粒体自和减弱了心力衰竭.
结论:
- 线粒体自是暂时激活,然后在压力过载引起的心力衰竭下调.
- 线粒体自的下调有助于心脏功能障碍.
- 恢复线粒体自可以治疗心力衰竭.
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