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与ALS相关的p97 R155H突变扰乱了iPSC衍生的运动神经元中的溶解细胞

Jacob A Klickstein¹, Michelle A Johnson¹, Pantelis Antonoudiou²

¹Department of Developmental Molecular and Chemical Biology, Tufts University School of Medicine, Boston, MA.

Stem cell reports

|February 9, 2024

概括

在p97的突变导致蛋白质病变,导致运动神经元的损失. 这项研究揭示了p97突变损害了 lysosome 清除,为神经退行性疾病提供了新的治疗点.

科学领域:

神经科学是一个神经科学.
细胞生物学细胞生物学
遗传学是一个遗传学.

背景情况:

在AAA+ ATPase p97中发生的突变与多系统蛋白质病变1有关,包括肌缩侧面硬化症.
在这些疾病中,驱动运动神经元退化的精确机制尚未完全理解.

研究的目的:

研究p97突变如何影响脊柱运动神经元的蛋白质组.
阐明p97在运动神经元内的 lysosomal homeostasis 和自过程中的作用.

主要方法:

利用诱导多能干细胞 (iPSC) 模型分化为脊髓运动神经元.
采用定量蛋白质组学来分析突变运动神经元中的蛋白质表达和变化.
评估溶解体功能,包括pH值和受损溶解体的清除.

主要成果:

p97 运动神经元中的R155H突变导致 lysosomes (lysophagy) 的选择性自功能受损.
突变运动神经元表现出降低活力和无法清除受损的溶酶体,随着溶酶体pH的增加.
对于 lysosome 清除至关重要的 UBXD1-p97 相互作用在 p97 R155H 突变运动神经元中被破坏.

结论:

内溶性体功能障碍是p97相关疾病的发病的一个重要因素.
用CB-5083抑制p97 ATPase活性可以挽救溶性缺陷,这表明一种潜在的治疗策略.

关键词:

这就是ALS.自自是自的过程.盖莱克因的使用方法 lysophagy lysophagy 是一种消化性消化方式.lysosome 溶解酶体是如何形成的线粒体中的线粒体.在P97中,P97是P97的代码.蛋白质组学蛋白质组学

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