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微质通过不同的受体,但类似的机制将陶单体和纤维内部化

Kristian F Falkon^1,2, Liliana Danford², Eduardo Gutierrez Kuri^1,2

¹Glenn Biggs Institute for Alzheimer's and Neurodegenerative Diseases, University of Texas Health Science Center San Antonio, San Antonio, Texas, USA.

Alzheimer's & dementia : the journal of the Alzheimer's Association

|December 23, 2024

概括

微细胞通过依赖激素的内细胞分裂吞蛋白,可能使用硫酸肝素蛋白质甘油来吸收纤维素. 这项研究阐明了神经退行性疾病中微质细胞如何将内部化.

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
生物化学生物化学

背景情况:

阿尔茨海默氏症 (AD) 和病症涉及细胞外聚合物,传播病理.
微质细胞,大脑的免疫细胞,吞病态蛋白质,但它们对细胞内细胞的机制仍然不清楚.

研究的目的:

为了研究微质细胞内细胞形成不同种类的的机制.
为了确定参与微质吸收的特定细胞通路和受体.

主要方法:

评估了tau单体和纤维的微质内细胞分解.
药理学调节的宏皮诺细胞体和克拉特林介导的内细胞体 (CME).
通过使用对抗性和遗传衰竭,研究了甲酸盐蛋白质糖 (HSPG) 和低密度脂蛋白受体相关蛋白1 (LRP1) 的作用.

主要成果:

动氨酸抑制降低了微质细胞对所有测试的tau物种的内细胞分裂.
肝硫酸蛋白质糖 (HSPG) 抗剂特别阻断了纤维素的吸收,而不是单体的吸收.
低密度脂蛋白受体相关蛋白1 (LRP1) 的对抗性或耗尽对tau内细胞形成不一致的影响.
基因复合酶治疗增强了tau的吸收,更喜欢纤维而不是单体.

结论:

单体和纤维的微质吸收取决于动氨酸,这表明像CME这样的途径发挥了作用.
肝硫酸盐蛋白质甘油 (HSPG) 参与纤维的吸收,但不一定是单体.
对于LRP1和其他受体在微质细胞内的精确作用,需要进一步研究.

关键词:

阿尔茨海默病的疾病阿尔茨海默病的疾病.细胞内分泌症 (endocytosis) 发生在细胞内.微质细胞中的微质细胞神经炎症是一种神经炎症.知道的知道的知道的病症是一种病症.

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