直接AMPK激活在杜申肌肉发育不良症中提供突变独立的治疗益处
Sean Y Ng1, Andrew I Mikhail1, Stephanie R Mattina1
1Department of Kinesiology, McMaster University, Hamilton, Ontario, Canada.
Journal of cachexia, sarcopenia and muscle
|February 4, 2026
概括
使用MK-8722的持续AMPK激活在杜申肌肉发育不良 (DMD) 模型中改善了肌肉功能和代谢健康. 这种不依赖突变的方法对治疗DMD和其他神经肌肉疾病有前途.
科学领域:
- 肌肉生理学和线粒体功能.
- 神经肌肉疾病和基因疗法
- 对代谢途径的药理向.
背景情况:
- 杜氏肌肉发育不良 (DMD) 是一种严重的遗传性疾病,导致渐进的肌肉退化和线粒体功能障碍.
- 目前用于DMD的基因疗法在特异性,输送和长期疗效方面面临挑战.
- 以前针对DMD向AMP激活蛋白激酶 (AMPK) 的尝试因效率不足和非向效应而受到限制.
研究的目的:
- 研究使用MK-8722在DMD临床前模型中持续AMPK激活的治疗潜力.
- 评估MK-8722对DMD的基因表达,肌肉功能和线粒体健康的影响.
- 评估MK-8722在患者衍生肌管中的安全性和有效性.
主要方法:
- 进行比较性转录基因分析,以比较基因表达特征.
- 在体内研究使用DBA/2J-mdx小鼠接受MK-8722或载体治疗7周.
- 在体外研究中,使用DMD患者衍生的神经管治疗MK-8722.2.
主要成果:
- MK-8722调节了206个DMD相关的转录,逆转了与疾病相关的基因表达变化.
- 在体内治疗增强了AMPK信号传递,增加了线粒体呼吸,改善了脂质氧化.
- 在肌肉力量,耐力和收缩功能方面观察到显著的改善,炎症和纤维化减少.
- 没有检测到对心脏形态或功能的不良影响.
- 在患者衍生的神经管中治疗MK-8722复制了对线粒体功能的有益影响.
结论:
- 通过MK-8722进行持续的全身AMPK激活,证明了改善DMD肌肉功能和代谢健康的安全有效方法.
- 观察到的好处是不依赖于突变的,这表明DMD的广泛适用性.
- 直接AMPK激动剂代表了DMD和其他神经肌肉疾病的有希望的疾病修饰治疗策略.
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