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干预针对体质CAG扩张可以成为一种快速改变疾病的治疗途径:临床前证据

Terence Gall-Duncan, Sangyoon Y Ko, Isabelle K Quick

bioRxiv : the preprint server for biology

|May 7, 2025

概括

针对亨廷顿病 (HD) 的小鼠体内CAG扩张,迅速改善了运动功能和分子特征. 这种方法为HD和其他重复扩张障碍提供了一个有希望的治疗途径.

科学领域:

神经科学是一个神经科学.
遗传学遗传学是一个
药理学药理学是指药理学的学科.

背景情况:

亨廷顿病 (HD) 是一种由遗传CAG重复扩张引起的神经退行性疾病.
这些CAG重复在大脑中体态扩大,加速疾病的进展.
减少HD体质CAG扩张的治疗潜力在很大程度上仍未被探索.

研究的目的:

调查干预体质CAG扩张是否可以在HD的小鼠模型中修改临床表型.
确定治疗窗口和受体扩张调制影响的特定表型.
评估血液生物标志物对目标参与和有效性的潜力.

主要方法:

急性给予纳夫提里丁-阿扎奎诺配体,在年轻的 (CAG) 120 HD小鼠中进行CAG重复.
评估运动功能,包括运动,平衡,协调和肌肉力量.
对分子疾病标记物的分析:mHTT聚合物,核外形态,核细胞质mRNA运输,转录组变化,神经炎症和神经退行.
对肌肉和血液的影响的评估,包括CAG不稳定性和神经纤维光水平.

主要成果:

治疗诱导了大脑区域的CAG收缩.
在运动功能和分子疾病里程碑中观察到显著的改善.
有益作用扩展到肌肉和血液,血液CAG不稳定性与大脑不稳定性相关.
血清中神经纤维光水平的降低表明神经退行症的减少.

结论:

针对体质重复扩张是亨廷顿病的快速,疾病修饰的治疗策略.
这种方法也可能适用于其他重复扩散疾病.
这些发现支持一个相互连接的病因路径,涉及体质CAG扩张,为未来的临床试验设计提供信息.

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