Astrocyte-derived interleukin-33 promotes microglial synapse engulfment and neural circuit development.

Astrocyte-derived interleukin-33 promotes microglial synapse engulfment and neural circuit development.
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星形胶质细胞衍生的白介素-33促进了小胶质的突触吞噬和神经回路的发育。

DOI:
10.1126/science.aal3589
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发表时间:
2018-03-16
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Molofsky AV
Molofsky AV
中科院分区:
其他
文献类型:
--
作者:
Vainchtein ID;Chin G;Cho FS;Kelley KW;Miller JG;Chien EC;Liddelow SA;Nguyen PT;Nakao-Inoue H;Dorman LC;Akil O;Joshita S;Barres BA;Paz JT;Molofsky AB;Molofsky AV

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神经突触的形成和重塑对中枢神经系统(CNS)的发育至关重要,在神经发育性疾病中是功能失调的。先天免疫信号调节外周的组织重塑,但这如何影响中枢神经系统突触在很大程度上是未知的。在这里,我们发现IL-1家族细胞因子白介素-33 (IL-33)是由发育中的星形胶质细胞产生的,是脊髓和丘脑正常突触数量和神经回路功能发育所必需的。我们发现IL-33在生理条件下主要向小胶质细胞发出信号,它促进小胶质突触吞噬,并且它可以在体内驱动小胶质依赖性突触消耗。这些数据揭示了在中枢神经系统发育过程中维持突触稳态所需的细胞因子介导机制。星形胶质细胞编码的细胞因子白介素-33促进中枢神经系统发育过程中的小胶质突触重塑。
Neuronal synapse formation and remodeling is essential to central nervous system (CNS) development and is dysfunctional in neurodevelopmental diseases. Innate immune signals regulate tissue remodeling in the periphery, but how this impacts CNS synapses is largely unknown. Here we show that the IL-1 family cytokine Interleukin-33 (IL-33) is produced by developing astrocytes and is developmentally required for normal synapse numbers and neural circuit function in the spinal cord and thalamus. We find that IL-33 signals primarily to microglia under physiologic conditions, that it promotes microglial synapse engulfment, and that it can drive microglial-dependent synapse depletion in vivo. These data reveal a cytokine-mediated mechanism required to maintain synapse homeostasis during CNS development. The astrocyte-encoded cytokine Interleukin-33 promotes microglial synapse remodeling during CNS development.
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