AGING CELL:老年记忆障碍背后的原因

2018-12-23 海北 MedSci原创

在正常衰老期间,先天免疫进展为慢性状态。然而至今为止,我们对于在衰老过程中如何产生氧化应激和慢性神经炎症仍不清楚。

在正常衰老期间,先天免疫进展为慢性状态。然而至今为止,我们对于在衰老过程中如何产生氧化应激和慢性神经炎症仍不清楚。

在最近的一项研究中,研究人员发现小鼠组织蛋白酶BCatB)的基因消融显着减少了活性氧(ROS)和神经炎症的产生,并改善了衰老过程中的认知障碍。

在培养的小胶质细胞中,CatB的药理学抑制显着减少了由L-亮氨酰-L-亮氨酸甲酯(LLOMe)(溶酶体 - 去稳定剂)诱导的线粒体衍生的ROS,以及减少了促炎介质的产生。

在用模拟老年小胶质细胞的LLOMe处理后过表达CatB的小胶质细胞中,在细胞质中泄漏的CatB负责线粒体转录因子ATFAM)的降解,通过受损的mtDNA生物合成,导致线粒体衍生的ROS和促炎介质的产生增加。此外,在侧脑室注射LLOMe处理的CatB过表达的小胶质细胞可以诱导中年小鼠的认知障碍。

这些结果表明,在衰老期间,小胶质细胞中CatB的增加和渗漏是导致线粒体衍生的ROS和促炎介质增加的原因,最终导致记忆障碍。


原始出处:

Junjun Ni et al. Increased expression and altered subcellular distribution of cathepsin B in microglia induce cognitive impairment through oxidative stress and inflammatory response in mice. AGING CELL 2018; doi: https://doi.org/10.1111/acel.12856


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    2019-03-05 维他命
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    2018-12-25 一个字-牛

    学习了谢谢分享

    0

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    2018-12-25 bioseraph

    貌似与溶酶体和自噬受损有关

    0

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