The microtubule cytoskeleton in cardiac mechanics and heart failure.

The microtubule cytoskeleton in cardiac mechanics and heart failure.
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DOI:
10.1038/s41569-022-00692-y
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发表时间:
2022-06
期刊:
Nature reviews. Cardiology
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其他
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心肌细胞的微管网络具有独特的结构和生物物理特征,以适应工作心脏的需求。活细胞成像和破译“微管蛋白密码”的进展为这种细胞骨架网络及其在心力衰竭中的作用提供了新的线索。微管为基础的运输编排的增长和维护的收缩装置时空控制翻译,同时也组织所需的兴奋-收缩耦合的专门的膜系统。为了承受工作心脏的高机械负荷,微管被后期修饰和物理加固。响应于对心肌的应激,微管网络通常通过致密化、翻译后修饰和稳定化进行重构。在这些条件下,物理增强的微管抵抗心肌细胞的运动并增加心肌硬度。因此,修饰的微管已经成为降低心力衰竭中僵硬的治疗靶点。在这篇综述中,我们讨论了微管对心脏力学的贡献,心脏病理中微管网络重塑的驱动因素以及靶向心脏微管在获得性心脏病中的治疗潜力的最新证据。
The microtubule network of cardiac muscle cells has unique architectural and biophysical features to accommodate the demands of the working heart. Advances in live-cell imaging and in deciphering the ‘tubulin code’ have shone new light on this cytoskeletal network and its role in heart failure. Microtubule-based transport orchestrates the growth and maintenance of the contractile apparatus spatiotemporal control of translation, while also organizing the specialized membrane systems required for excitation–contraction coupling. To withstand the high mechanical loads of the working heart, microtubules are post-translationally modified and physically reinforced. In response to stress to the myocardium, the microtubule network remodels, typically through densification, post-translational modification and stabilization. Under these conditions, physically reinforced microtubules resist the motion of the cardiomyocyte and increase myocardial stiffness. Accordingly, modified microtubules have emerged as a therapeutic target for reducing stiffness in heart failure. In this Review, we discuss the latest evidence on the contribution of microtubules to cardiac mechanics, the drivers of microtubule network remodelling in cardiac pathologies and the therapeutic potential of targeting cardiac microtubules in acquired heart diseases.
射血分数保留的心力衰竭运动不耐受的机制:异常外周氧提取的作用。
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