在神经退行症中,ITCH 调节了 Golgi 完整性和蛋白质毒性
Qiwang Xiang1, Yuning Lu1, Hongjin Wang1
1Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, 21205, USA.
Science advances
|October 24, 2025
概括
E3酶的同类物 (ITCH) 通过损害蛋白质清除来驱动神经退行性疾病 (如ALS和阿尔茨海默氏症) 的戈尔基分裂. 抑制ITCH可以防止神经毒性,揭示关键的致病途径.
科学领域:
- 神经生物学 神经生物学 神经生物学
- 细胞生物学 细胞生物学
- 分子医学是分子医学.
背景情况:
- 戈尔吉分裂是神经退行性疾病的标志,包括ALS和阿尔茨海默病.
- 在不同的神经退行性疾病中驱动戈尔吉分裂的潜在机制尚未完全理解.
研究的目的:
- 确定神经退行症中戈尔吉分裂的关键调节者.
- 阐明E3无素-蛋白质结合酶的同类物 (ITCH) 在蛋白质毒性和神经退行症中的作用.
主要方法:
- 使用哺乳动物神经元和Drosophila模型研究ITCH在戈尔吉分裂中的作用.
- 研究了ITCH积累对蛋白质分类和 lysosomal 功能的影响.
- 评估了ITCH抑制对蛋白质毒性的影响.
- 在患者样本中分析了USP11对ITCH的调节.
主要成果:
- ITCH被确定为蛋白质毒性的关键调节剂,诱导戈尔吉分裂.
- ITCH 积累会破坏 cis 和 trans-Golgi 网络,损害 lysosomal 功能,并阻碍错误折叠的蛋白质的清除.
- 在实验模型中,ITCH的抑制证明了对神经退行症的保护作用.
- 对USP11的上调导致ALS和AD患者的ITCH稳定和积累.
结论:
- ITCH在戈尔吉的完整性和蛋白质稳定性中发挥着关键作用,有助于神经退行性疾病的发病.
- ITCH/USP11途径代表了神经退行性疾病的新型治疗点.
- 了解戈尔吉分裂机制对于开发针对ALS和阿尔茨海默病等疾病的有效治疗方法至关重要.
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