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CELL:免疫细胞可以进脑!还能帮助脑内细胞成熟

2020-07-25 MedSci原创 MedSci原创

以往的研究表明,大脑是一个具有相对免疫特权的场所。虽然CD4 T细胞已被报道在中枢神经系统中存在,但是,它们是否在健康的大脑中存在仍然是有争议的,此外,它们的功能在很大程度上仍然是未知的。

以往的研究表明,大脑是一个具有相对免疫特权的场所。虽然CD4 T细胞已被报道在中枢神经系统中存在,但是,它们是否在健康的大脑中存在仍然是有争议的,此外,它们的功能在很大程度上仍然是未知的。

在此,研究人员利用成像、单细胞和手术方法结合,在小鼠和人脑中鉴定出一个不同于循环CD4 T细胞的CD69+ CD4 T细胞群。大脑常驻细胞群体是从激活的循环细胞中原位分化产生的,并由自身抗原和外周微生物组刺激形成。

单细胞测序显示,在缺乏小鼠CD4 T细胞的情况下,脑内常驻小胶质细胞仍停留在胎儿和成人之间的状态。这种成熟缺陷导致了过多的不成熟神经元突触和行为异常。

这些结果阐明了CD4 T细胞在脑发育中的作用,以及免疫系统和神经系统进化之间潜在的相互联系的动态关系。

 

原始出处:

Emanuela Pasciuto et al. Microglia Require CD4 T Cells to Complete the Fetal-to-Adult Transition, CELL (2020). DOI:https://doi.org/10.1016/j.cell.2020.06.026

 

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    2021-01-03 维他命
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    2020-07-25 14816961m23暂无昵称

    厉害

    0

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    2020-07-25 1de79113m37(暂无匿称)

    免疫无所不能

    0

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    2020-07-25 风湿免疫科医生

    。。。。

    0

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    2020-07-25 DOC.Y

    0

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小胶质细胞是大脑中的主要免疫细胞,在脑稳态和神经系统疾病中发挥着重要的作用。 但是至今为止,小胶质细胞-神经元通信的基础机制仍然没有被完全研究清楚。

Nat Neurosci:发现大脑“**反应者”,对可塑性的关键作用

众所周知,大脑是具有高度可塑性的。当睡眠时,它有助于学习和记忆的巩固,并将废物清除。觉醒时,通常是由一系列神经调节物质,这些物质能改变神经元和神经胶质细胞的细胞膜性质以及电活动情况。但是,科学家对大脑维持组织稳态的机制及其在突触可塑性发挥的作用还知之甚少。

Nat Neurosci:张果/蔡东升/李聚学团队发现,抑制Tak1逆转肥胖相关脑血管障碍

长期肥胖与脑血管功能障碍有关,然而,我们对其基本机制仍不清楚。

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