斑马鱼
肌原纤维
肌肉无力
弱点
自噬
液泡
生物
细胞生物学
肌营养不良
解剖
内分泌学
遗传学
细胞质
基因
细胞凋亡
作者
Emily A. McKaige,Clara Lee,Vanessa Calcinotto,Saveen Giri,Simon Crawford,Meagan Jane Mcgrath,Georg Ramm,Robert J. Bryson-Richardson
摘要
Mutations in DNAJB6 are a well-established cause of limb girdle muscular dystrophy type D1 (LGMD D1). Patients with LGMD D1 develop progressive muscle weakness with histology showing fibre damage, autophagic vacuoles, and aggregates. Whilst there are many reports of LGMD D1 patients, the role of DNAJB6 in the muscle is still unclear. In this study, we developed a loss of function zebrafish model in order to investigate the role of Dnajb6. Using a double dnajb6a and dnajb6b mutant model, we show that loss of Dnajb6 leads to a late onset muscle weakness. Interestingly, we find that adult fish lacking Dnajb6 do not have autophagy or myofibril defects, however, they do show mitochondrial changes and damage. This study demonstrates that loss of Dnajb6 causes mitochondrial defects and suggests that this contributes to muscle weakness in LGMD D1. These findings expand our knowledge of the role of Dnajb6 in the muscle and provides a model to screen novel therapies for LGMD D1.
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