严重的COL6相关变的特征由于复发变体COL6A1c.930+189C>T的复发变体
A Reghan Foley1, Véronique Bolduc1, Fady Guirguis1
1Neuromuscular and Neurogenetic Disorders of Childhood Section, Neurogenetics Branch, National Institute of Neurological Disorders and Stroke, NIH, Bethesda, MD 20892, USA.
Brain : a journal of neurology
|April 3, 2025
概括
COL6A1中的一种新型深层内基变异导致严重形式的与原VI相关的缩症 (COL6-RD). 这一发现确定了一种共同的遗传原因,并支持乌里希先天性肌肉发育不良 (UCMD) 的有前途的伪埃克松跳转疗法.
科学领域:
- 遗传学 遗传学 是一个
- 分子生物学分子生物学
- 神经肌肉疾病 神经肌肉疾病
背景情况:
- 与原VI相关的缩症 (COL6-RD) 呈现了一系列的表型,从严重的乌里希先天性肌肉缩症 (UCMD) 到较轻的伯利恒肌肉缩症.
- 尽管具有特征性的临床和病理特征,但一些COL6-RD患者缺乏COL6A1,COL6A2或COL6A3基因的已识别的致病变异.
研究的目的:
- 在没有先前识别的变异的COL6-RD患者中确定遗传原因.
- 描述与新发现的 COL6A1 深层内在变异相关的临床表型.
- 评估伪埃克松跳转在 COL6-RD. 的治疗潜力.
主要方法:
- 结合肌肉RNA测序和全基因组测序被用于识别致病性遗传变异.
- 一个国际患者队列的临床和遗传特征.
- 在实验室中使用拼接调节的反感性寡合体进行了实验,以评估治疗疗效.
主要成果:
- 在COL6A1中,一种复发的,de novo深层内内变异 (c.930+189C>T),导致伪外显子插入,被确定为COL6-RD的常见原因.
- 这种变异的44名患者表现出持续严重的表型,进展到UCMD的严重形式.
- 一位患有体质马赛克的患者表现出较温和的伯利恒肌肉发育不良现象型,支持该变体的致病性和治疗向性.
结论:
- 鉴定到的 COL6A1 深层内在变体是严重的 COL6-RD 的常见原因,特别是UCMD.
- 伪埃克森跳转疗法证明了治疗这种常见的COL6-RD变异的显著翻译前景.
- 了解这种遗传机制为诊断和管理COL6-RD患者提供了新的途径.
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