Cardiac myosin super relaxation (SRX): a perspective on fundamental biology, human disease and therapeutics.

Cardiac myosin super relaxation (SRX): a perspective on fundamental biology, human disease and therapeutics.
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心肌肌球蛋白超松弛(SRX):基础生物学、人类疾病和治疗的观点。

DOI:
10.1242/bio.057646
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发表时间:
2021-02-15
期刊:
影响因子:
2.4
通讯作者:
Toepfer CN
Toepfer CN
中科院分区:
生物学4区
文献类型:
--
作者:
Schmid M;Toepfer CN

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肌肉收缩的基本基础“滑动丝模型”和“摆动、倾斜横桥-滑动丝机制”成为了一个研究领域的核心,揭示了肌球蛋白结构在收缩调节中复杂而迷人的作用。最近在丝状肌球蛋白中观察到了一种称为超松弛状态(SRX)的肌球蛋白能量守恒状态,它对于调节肌节内的力量产生和能量使用至关重要。通过 SRX 调节肌球蛋白功能是心血管疾病和传染病治疗开发中快速发展的主题。在首次发现有关肌肉功能的大约 70 年后,肌球蛋白 SRX 的调节可能会将第一个肌球蛋白靶向小分子带入临床,用于治疗肥厚性心肌病。 HCM 是一种单基因疾病,每 500 人中就有 1 人患有 HCM,可导致心力衰竭和心源性猝死。即使我们接近治疗转化,关于人类健康和疾病中肌肉功能的治理仍然存在许多问题。通过这篇综述,我们对肌球蛋白 SRX 的当代理解进行了广泛的概述,并探讨了在人类疾病中针对这种肌球蛋白状态的复杂性。摘要:讨论肌球蛋白超弛豫在生物学、进化、人类疾病和心脏治疗中的作用和调节。
The fundamental basis of muscle contraction ‘the sliding filament model’ and the ‘swinging, tilting crossbridge-sliding filament mechanism’ nucleated a field of research that has unearthed the complex and fascinating role of myosin structure in the regulation of contraction. A recently discovered energy conserving state of myosin termed the super relaxed state (SRX) has been observed in filamentous myosins and is central to modulating force production and energy use within the sarcomere. Modulation of myosin function through SRX is a rapidly developing theme in therapeutic development for both cardiovascular disease and infectious disease. Some 70 years after the first discoveries concerning muscular function, modulation of myosin SRX may bring the first myosin targeted small molecule to the clinic, for treating hypertrophic cardiomyopathy. An often monogenic disease HCM afflicts 1 in 500 individuals, and can cause heart failure and sudden cardiac death. Even as we near therapeutic translation, there remain many questions about the governance of muscle function in human health and disease. With this review, we provide a broad overview of contemporary understanding of myosin SRX, and explore the complexities of targeting this myosin state in human disease. Summary: A discussion of the role and regulation of myosin super relaxation in biology, evolution, human disease, and cardiac therapeutics.
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