Prenatal environmental stressors impair postnatal microglia function and adult behavior in males.

Prenatal environmental stressors impair postnatal microglia function and adult behavior in males.
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产前环境应激损害出生后小胶质细胞的功能和成年男性的行为。

DOI:
10.1016/j.celrep.2022.111161
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发表时间:
2022-08-02
期刊:
影响因子:
8.8
通讯作者:
Bilbo, Staci D.
Bilbo, Staci D.
中科院分区:
生物学1区
文献类型:
--
作者:
Block, Carina L.;Eroglu, Oznur;Mague, Stephen D.;Smith, Caroline J.;Ceasrine, Alexis M.;Sriworarat, Chaichontat;Blount, Cameron;Beben, Kathleen A.;Malacon, Karen E.;Ndubuizu, Nkemdilim;Talbot, Austin;Gallagher, Neil M.;Jo, Young Chan;Nyangacha, Timothy;Carlson, David E.;Dzirasa, Kafui;Eroglu, Cagla;Bilbo, Staci D.

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在流行病学上,妊娠期暴露于环境毒素和社会经济压力源与男性偏见强烈的神经发育障碍(如自闭症)有关。我们在小鼠中模拟了这些产前危险因素,将怀孕的水坝暴露在环境污染物和有限资源压力中,从而强有力地激活母体免疫系统。只有雄性后代表现出长期的行为异常和编码社会互动的大脑网络活动的改变。在细胞上,产前应激源在男性出生后早期发育过程中削弱了前扣带皮层(社会编码网络的中心节点)内的小胶质细胞功能。野生型(WT)小鼠在相同的关键时期对前扣带皮层(ACC)内小胶质细胞吞噬的精确抑制模拟了产前应激源对雄性特异性行为的影响,表明环境应激源通过损害发育过程中的小胶质细胞功能改变了雄性神经回路的形成。Block等人的研究表明,在怀孕期间暴露于空气污染和母亲的压力会激活母亲的免疫系统,并在后代的社会行为和神经回路连接方面诱发男性特异性损伤。在细胞上,产前应激源会降低小胶质细胞的吞噬功能,而小胶质细胞吞噬功能的抑制会导致产前应激源造成的行为缺陷。
Gestational exposure to environmental toxins and socioeconomic stressors is epidemiologically linked to neurodevelopmental disorders with strong male bias, such as autism. We model these prenatal risk factors in mice by co-exposing pregnant dams to an environmental pollutant and limited-resource stress, which robustly activates the maternal immune system. Only male offspring display long-lasting behavioral abnormalities and alterations in the activity of brain networks encoding social interactions. Cellularly, prenatal stressors diminish microglial function within the anterior cingulate cortex, a central node of the social coding network, in males during early postnatal development. Precise inhibition of microglial phagocytosis within the anterior cingulate cortex (ACC) of wild-type (WT) mice during the same critical period mimics the impact of prenatal stressors on a male-specific behavior, indicating that environmental stressors alter neural circuit formation in males via impairing microglia function during development. Block et al. show that combined exposure to air pollution and maternal stress during pregnancy activates the maternal immune system and induces male-specific impairments in social behavior and circuit connectivity in offspring. Cellularly, prenatal stressors diminish microglia phagocytic function, and inhibition of microglia phagocytosis phenocopies behavioral deficits from prenatal stressors.
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