Astrocytes decrease adult neurogenesis during virus-induced memory dysfunction via IL-1.

Astrocytes decrease adult neurogenesis during virus-induced memory dysfunction via IL-1.
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星形胶质细胞通过IL-1降低了病毒诱导的记忆功能障碍期间成人神经发生。

DOI:
10.1038/s41590-017-0021-y
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发表时间:
2018-03
期刊:
影响因子:
30.5
通讯作者:
Klein RS
Klein RS
中科院分区:
医学1区
文献类型:
--
作者:
Garber C;Vasek MJ;Vollmer LL;Sun T;Jiang X;Klein RS

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西尼罗病毒神经侵袭性疾病(WNND)后的记忆障碍与海马突触丧失和缺乏恢复相关。成人神经发生和突触发生是海马修复的基本特征,表明病毒影响这些过程。在这里,使用wnnd诱导的认知功能障碍的既定模型,转录谱揭示了限制成人神经发生的基因表达的改变,包括白细胞介素(IL)-1。wnnd恢复的动物表现出神经母细胞减少和星形发生增加,在30天内海马神经发生没有恢复。体外分离的小胶质细胞和星形胶质细胞的细胞因子产生分析显示后者是IL-1的主要来源。IL-1R1缺失、wnnd恢复的小鼠表现出正常的神经发生、突触前末端的恢复和对空间学习缺陷的抵抗,后者在IL-1R1拮抗剂治疗后也出现了同样的情况。因此,促炎星形胶质细胞的优先生成通过IL-1的表达损害了神经元祖细胞的稳态,这可能是WNND长期认知后果的基础,但也提供了一个治疗靶点。
Memory impairment following West Nile virus neuroinvasive disease (WNND) is associated with loss of hippocampal synapses with lack of recovery. Adult neurogenesis and synaptogenesis are fundamental features of hippocampal repair, suggesting viruses impact these processes. Here, using an established model of WNND-induced cognitive dysfunction, transcriptional profiling revealed alterations in gene expression that limit adult neurogenesis, including interleukin (IL)-1. WNND-recovered animals exhibit decreased neuroblasts and increased astrogenesis, without recovery of hippocampal neurogenesis at thirty days. Analysis of cytokine production in ex vivo isolated microglia and astrocytes revealed the latter to be the predominant source of IL-1. IL-1R1-deficient, WNND-recovered mice exhibit normal neurogenesis, recovery of presynaptic termini, and resistance to spatial learning defects, the latter of which likewise occurred after treatment with IL-1R1 antagonist. Thus, preferential generation of proinflammatory astrocytes impairs neuronal progenitor cell homeostasis via expression of IL-1, which may underlie long-term cognitive consequences of WNND, but provides a therapeutic target.
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