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肌缩侧面硬化症的溶解体功能障碍:与p.G376DTARDBP突变相关的家族病例

Roberta Romano¹, Victoria Stefania Del Fiore¹, Giorgia Ruotolo^2,3

¹Department of Experimental Medicine, University of Salento, Via Provinciale Lecce-Monteroni n. 165, 73100 Lecce, Italy.

International journal of molecular sciences

|April 17, 2025

概括

在TARDBP基因 (G376D) 中的一种特定突变破坏了运动神经元中的 lysosome 功能,导致了肌缩侧面硬化症 (ALS) 中的神经退行. 这一发现为ALS病原体提供了新的见解.

科学领域:

神经科学是一个神经科学.
遗传学是一个遗传学.
细胞生物学细胞生物学

背景情况:

肌缩侧面硬化症 (ALS) 是一种致命的神经退行性疾病,其特征是运动神经元损失.
家族性ALS病例是由各种基因的突变引起的,包括TARDBP,该基因编码为TDP-43.
在TARDBP中的G376D突变导致TDP-43的错位化和聚合.

研究的目的:

研究TARDBP G376D突变对细胞机制的影响,特别是溶酶体功能.
为了确定观察到的细胞缺陷是否存在于患者衍生的运动神经元中.

主要方法:

对来自TARDBP G376D突变患者的纤维细胞和诱导多能干细胞 (iPSC) 衍生的运动神经元的分析.
评估溶酶体数量,TFEB (转录因子EB) 局部化和溶酶体功能.

主要成果:

带有G376D突变的纤维细胞显示 lysosome数量增加和TFEB核转位,但损害了 lysosomal 功能.
lysosomal 功能障碍在晚期疾病阶段恶化.
在携带G376D突变的iPSC衍生的运动神经元中观察到类似的病理表型.

结论:

在TARDBP G376D突变损害 lysosomal 的功能.
lysosomal 功能受损可能在 ALS 中观察到的神经退行症中起作用.

关键词:

在TDP-43中使用.美国联邦税务法 (TFEB)骨髓缩侧面硬化症 (ALS) 是一种 lysosome 溶解酶体是如何形成的神经退行症的神经退行症神经退行性疾病是一种神经退行性疾病.

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