TFEB-真空ATPase信号调节 lysosomal 功能和微质激活在病症中的作用
Baiping Wang1,2, Heidi Martini-Stoica1,3,4, Chuangye Qi1
1Huffington Center on Aging, Baylor College of Medicine, Houston, TX, USA.
Nature neuroscience
|November 21, 2023
概括
转录因子EB (TFEB) 控制了溶酶体的功能. 破坏TFEB信号传递会损害微质细胞的功能.
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
- 免疫学 免疫学 免疫学
背景情况:
- 转录因子EB (TFEB) 通过CLEAR序列调节 lysosome生物发生和功能.
- 空腔ATPase (v-ATPase) 子单元是TFEB的目标,对溶酶体酸化至关重要.
- 微质在病模式中表现出明显的子集群,与免疫和溶酶体通路相关.
研究的目的:
- 为了研究TFEB-v-ATPase信号传递在 lysosomal homeostasis中的作用.
- 探索被破坏的溶酶体免疫信号对病症进展的影响.
- 在阿尔茨海默氏病模型中阐明微质在免疫反应中的作用.
主要方法:
- 在Atp6v1h基因中产生了一种具有突变的CLEAR序列的敲入鼠标线,破坏了TFEB-v-ATPase信号传输.
- 利用单核RNA测序来分析野生类型,Tau转基因和CLEAR突变小鼠中的微质子集群.
- 交叉CLEAR突变小鼠与tau转基因小鼠,以评估tau病理和免疫反应.
主要成果:
- 在CLEAR突变体中,由于对TFEB响应的减弱, lysosomal 酸化和活性受损.
- 将CLEAR突变体与Tau小鼠交叉,导致tau病理增加.
- 在CLEAR突变Tau小鼠中的微细胞显示出反应减弱,其特征是mTOR和HIF-1通路的低平静状态.
结论:
- TFEB-v-ATPase信号传递对于维持 lysosomal 稳态至关重要.
- lysosomal 功能极大地影响微质细胞和免疫反应在病和阿尔茨海默氏症.
- 向溶酶体免疫通路可能为神经退行性疾病提供治疗策略.
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