AGING CELL:免疫细胞更新逆转老年认知缺陷

2018-10-15 海北 MedSci原创

小胶质细胞是大脑的常驻免疫细胞,可以通过对集落刺激因子1受体(CSF1R)的药理学抑制来消除。撤回CSF1R抑制然后刺激小胶质细胞再增殖,可以有效地取代小胶质细胞室。

小胶质细胞是大脑的常驻免疫细胞,可以通过对集落刺激因子1受体(CSF1R)的药理学抑制来消除。撤回CSF1R抑制然后刺激小胶质细胞再增殖,可以有效地取代小胶质细胞室。在老年人的大脑中,小胶质细胞呈现“引发”的表型,研究表明这与年龄相关的认知衰退相吻合。
最近,研究人员使用CSF1R抑制剂诱导小胶质细胞再增殖,并研究了用新小胶质细胞替换老年小胶质细胞的效果。通过28天的再增殖,替代老年小鼠(24个月)中的常驻小胶质细胞改善了空间记忆,并恢复了年轻成年动物(4个月)中发现的物理小胶质细胞组织特征(细胞密度和形态)。
然而,炎症相关的基因表达并没有随着重新种植而广泛改变,也没有对免疫挑战的反应。相反,小胶质细胞再增殖导致神经元基因表达的年龄相关变化的逆转,包括与肌动蛋白细胞骨架重塑和突触发生相关的基因的表达。
年龄相关的海马神经元复杂性的变化被小胶质细胞的消除和再增殖所逆转,而小胶质细胞消除增加了神经发生和树突棘密度。小胶质细胞的再增殖实现了对年龄诱导缺陷的全面挽救。
因此,该研究表明,老年大脑的几个关键缺陷可以通过小胶质细胞的急性非侵入性替代来逆转。

原始出处:
Monica R. P. Elmore et al. Replacement of microglia in the aged brain reverses cognitive, synaptic, and neuronal deficits in mice. AGING CELL 2018, DOI: https://doi.org/10.1111/acel.12832

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    2019-09-29 维他命
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    2018-10-16 明月清辉

    谢谢分享,学习了

    0

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    2018-10-15 kafei

    学习了谢谢

    0

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    2018-10-15 183****7028

    学习

    0

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    2018-10-15 lietome15

    好文,值得点赞!认真学习了,把经验应用于实践,为患者解除病痛。

    0

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    2018-10-15 明月清辉

    谢谢分享,学习了谢谢分享,学习了

    0

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