显性氨酰-tRNA合成酶疾病:从疾病模型中获得的经验教训。
Dominant aminoacyl-tRNA synthetase disorders: lessons learned from disease models.
作者信息
Kalotay Elizabeth, Klugmann Matthias, Housley Gary D, Fröhlich Dominik
机构信息
Translational Neuroscience Facility and Department of Physiology, School of Biomedical Sciences, University of New South Wales, Sydney, NSW, Australia.
Research Beyond Borders, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riss, Germany.
出版信息
Front Neurosci. 2023 May 12;17:1182845. doi: 10.3389/fnins.2023.1182845. eCollection 2023.
Aminoacyl-tRNA synthetases (ARSs) play an essential role in protein synthesis, being responsible for ligating tRNA molecules to their corresponding amino acids in a reaction known as 'tRNA aminoacylation'. Separate ARSs carry out the aminoacylation reaction in the cytosol and in mitochondria, and mutations in almost all ARS genes cause pathophysiology most evident in the nervous system. Dominant mutations in multiple cytosolic ARSs have been linked to forms of peripheral neuropathy including Charcot-Marie-Tooth disease, distal hereditary motor neuropathy, and spinal muscular atrophy. This review provides an overview of approaches that have been employed to model each of these diseases , followed by a discussion of the existing animal models of dominant ARS disorders and key mechanistic insights that they have provided. In summary, ARS disease models have demonstrated that loss of canonical ARS function alone cannot fully account for the observed disease phenotypes, and that pathogenic ARS variants cause developmental defects within the peripheral nervous system, despite a typically later onset of disease in humans. In addition, aberrant interactions between mutant ARSs and other proteins have been shown to contribute to the disease phenotypes. These findings provide a strong foundation for future research into this group of diseases, providing methodological guidance for studies on ARS disorders that currently lack models, as well as identifying candidate therapeutic targets.
氨酰-tRNA合成酶(ARSs)在蛋白质合成中起着至关重要的作用,负责在一种被称为“tRNA氨酰化”的反应中将tRNA分子与其相应的氨基酸连接起来。不同的ARSs在细胞质和线粒体中进行氨酰化反应,几乎所有ARS基因的突变都会导致在神经系统中最为明显的病理生理学变化。多种细胞质ARSs中的显性突变与包括夏科-马里-图斯病、远端遗传性运动神经病和脊髓性肌萎缩症在内的多种周围神经病形式有关。本综述概述了用于对这些疾病进行建模的方法,随后讨论了现有的显性ARS疾病动物模型以及它们所提供的关键机制见解。总之,ARS疾病模型表明,仅经典ARS功能的丧失并不能完全解释所观察到的疾病表型,并且致病性ARS变体尽管在人类中疾病通常发病较晚,但会导致周围神经系统内的发育缺陷。此外,已证明突变的ARSs与其他蛋白质之间的异常相互作用会导致疾病表型。这些发现为未来对这组疾病的研究提供了坚实的基础,为目前缺乏模型的ARS疾病研究提供了方法学指导,并确定了候选治疗靶点。