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抑制PTBP1重编程肌体发生,以通过纠正E2A剪接在mdx小鼠中挽救受损的肌肉再生

Shusheng Fan¹, Xiaoyun Liu¹, Qian Pan¹

¹New Drug Screening and Pharmacodynamics Evaluation Center, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China.

Nature communications

|March 13, 2026

概括

聚皮里米丁管结合蛋白1的失调会损害杜氏肌肉发育不良的肌肉再生. 针对这种蛋白质或调节转录因子E2-alpha拼接恢复肌肉修复和功能.

科学领域:

肌肉生物学肌肉生物学
分子遗传学分子遗传学
再生医学是一种再生医学.

背景情况:

杜氏肌肉发育不良 (DMD) 是一种严重的遗传疾病,导致肌肉逐渐退化.
肌肉再生受损是DMD的标志,需要新的治疗策略.
转录因子E2-alpha (编码E12和E47) 的替代拼接对于肌肉发育至关重要.

研究的目的:

调查聚胺系结合蛋白1 (PTBP1) 在调节转录因子E2-alpha在DMD中的拼接中的作用.
探索PTBP1作为恢复DMD肌肉再生的潜在治疗点.

主要方法:

在DMD患者和mdx小鼠模型中分析PTBP1表达.
研究PTBP1水平对转录因子E2-alpha拼接和肌细胞分化的影响.
在mdx小鼠中评估PTBP1倒置和dergrasyn治疗的治疗疗效.

主要成果:

在DMD中,PTBP1异常升高,导致E47/E12比率偏差和肌细胞分化受损.
在mdx小鼠中,PTBP1的淘汰恢复了分化,增强了肌肉修复和改善了肌肉功能.
德格拉辛 (Dergrasyn) 是一种二维基基因酶抑制剂,可降低PTBP1水平,促进肌原分化并改善DMD病理.

结论:

PTBP1是DMD中被破坏的肌原分化的关键调节者.
调节PTBP1水平或转录因子E2-alpha拼接为DMD提供了一个有希望的治疗途径.
准PTBP1提供了一种新的策略,以恢复杜氏肌肉发育不良的肌肉再生.

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