相关实验视频

Updated: Jul 26, 2025

Multi-exon Skipping Using Cocktail Antisense Oligonucleotides in the Canine X-linked Muscular Dystrophy

Multi-exon Skipping Using Cocktail Antisense Oligonucleotides in the Canine X-linked Muscular Dystrophy

Published on: May 24, 2016

DNAJB6异形特异性敲击:对肢体腰带肌肉缩D1的治疗潜力

Andrew R Findlay¹, May M Paing¹, Jil A Daw¹

¹Department of Neurology, Neuromuscular Division, Washington University School of Medicine, Saint Louis, MO 63110, USA.

Molecular therapy. Nucleic acids

|June 22, 2023

概括

针对DNAJB6b,一种特定的蛋白质异型,显示出治疗四肢腰带肌肉发育不良 (LGMD) 的希望 D1.1. 这种异形特异性淘汰方法可能为LGMD D1患者提供更安全的治疗策略.

科学领域:

分子生物学分子生物学
遗传学遗传学是一个
生物化学生物化学

背景情况:

肢体腰带肌肉发育不良 (LGMD) D1是由DNAJB6的主导突变引起的,DNAJB6是热冲击蛋白70 (HSP70) 的共同伴侣.
两个DNAJB6异型,DNAJB6a和DNAJB6b,存在着不同的肌肉定位,DNAJB6b与疾病的发病有关.
目前的治疗策略有限,并且由于胚胎致死性,完全的DNAJB6淘汰是不可行的.

研究的目的:

开发和评估DNAJB6的异形特异性淘汰方法,使用morpholinos.
研究选择性降低LGMD D1.1.中的DNAJB6b水平的治疗潜力.
分析与LGMD D1相关的蛋白质组变化和DNAJB6b减少的影响.

主要方法:

开发了基于morpholino的,对DNAJB6a和DNAJB6b的异型特异性敲除.
在小鼠肌管和人类LGMDD1髓细胞中* in vitro*实现了选择性减少,在小鼠骨肌中* in vivo*实现了选择性减少.
利用质谱测量来识别LGMDD1蛋白质的特征,并评估DNAJB6b在克诺金小鼠模型中被击倒后的蛋白质变化.

主要成果:

成功证明了DNAJB6a和DNAJB6b的选择性淘汰 *in vitro*和 *in vivo*.
确定了与蛋白质平衡和肌纤维细胞结构相关的 LGMDD1 蛋白质特征.
在LGMDD1神经管中选择性减少DNAJB6b,部分扭转了蛋白质性疾病特征,使其达到野生型水平.

结论:

可以实现DNAJB6b的异形特异性淘汰,并显示了纠正LGMDD1相关蛋白质组变化的潜力.
需要进一步的*in vivo*功能研究来验证选择性DNAJB6b减少作为LGMD D1.1的可行的治疗策略.

关键词:

在DNAJB6中使用.MT:寡核酸:治疗方法和应用.特定的异形 knockdown 中断.肢体腰带肌肉缩症D1 (LGMDD1) 的研究结果形态学 (morpholino) 是一种形态学.蛋白质组学蛋白质组学

更多相关视频

In Vivo Modeling of the Morbid Human Genome using Danio rerio

In Vivo Modeling of the Morbid Human Genome using Danio rerio

Published on: August 24, 2013

Characterizing Exon Skipping Efficiency in DMD Patient Samples in Clinical Trials of Antisense Oligonucleotides

Characterizing Exon Skipping Efficiency in DMD Patient Samples in Clinical Trials of Antisense Oligonucleotides

Published on: May 7, 2020

相关概念视频

Directly Acting Muscle Relaxants: Dantrolene and Botulinum Toxin

Directly Acting Muscle Relaxants: Dantrolene and Botulinum Toxin

Directly acting muscle relaxants like dantrolene and botulinum toxin (BoNT) have distinct mechanisms and applications. Dantrolene, a hydantoin derivative, acts on the ryanodine receptor (RYR1) in skeletal muscle cells. RYR1 are calcium channels present at the sarcoplasmic reticulum membrane. In response to excitation, they release calcium ions from the sarcoplasmic reticulum to the cytosol. Calcium promotes actin-myosin-mediated contraction of muscles.
The binding of dantrolene to the RYR1...

Satellite Stem Cells and Muscular Dystrophy

Satellite Stem Cells and Muscular Dystrophy

Satellite stem cells or myosatellite cells are quiescent stem cells that Alexander Mauro first identified in 1961. These cells are located between the sarcolemma, the plasma membrane of muscle fibers, and the basal lamina, the connective tissue sheath covering it. These mononucleated cells are activated in response to muscle injury, can transform into myoblasts, and may form or repair muscle fibers. Myosatellite cells can provide additional myonuclei for muscle regeneration or return to a...