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背脊拉菲核中的希斯胺胺激素促进了压力和抗抑郁药物介导的基因表达和行为

Amni Al-Kachak¹, Giuseppina Di Salvo^1,2, Sasha L Fulton¹

¹Nash Family Department of Neuroscience, Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA.

Nature communications

|June 13, 2024

概括

色胺在表观遗传上通过H3K4me3Q5ser修改大脑基因表达,影响情绪障碍. 在小鼠中破坏这种表观遗传标记,并在人类MDD患者中观察它,揭示了压力和抗抑郁药物治疗的新途径.

科学领域:

神经科学是一个神经科学.
表观遗传学在表观遗传学中,表观遗传学是指表观遗传学.
分子精神病学分子精神病学

背景情况:

情绪障碍,包括主要抑郁症 (MDD),影响全球数百万人,慢性压力是关键风险因素.
目前的血清素相关抗抑郁药 (ADs) 有局限性,包括低缓解率和治疗延迟,促使对替代机制的研究.
血清素在压力诱导的大脑功能障碍和MDD病理生理学中的作用仍然不完全理解,特别是在表观遗传修饰方面.

研究的目的:

为了研究慢性压力和MDD对脊椎拉菲核 (DRN) 中的色胺介导的表观遗传修饰 (H3K4me3Q5ser) 的影响.
检查H3K4me3Q5ser动态,基因表达和对压力和抗抑郁药治疗的行为反应之间的关联.
为了探索一种潜在的神经传递独立的作用,在压力和MDD.

主要方法:

在DRN中对暴露于慢性社会失败压力的小鼠和人类MDD患者的全基因组和生物化学分析.
在应激和AD暴露后评估H3K4me3Q5ser动态.
病毒媒介基因疗法在小鼠操纵H3K4me3Q5ser水平和评估行为和基因表达的变化.

主要成果:

长期受到压力的小鼠在DRN中表现出失调的H3K4me3Q5ser动态.
通过AD或基因疗法破坏H3K4me3Q5ser动态,减弱压力诱导的基因表达和行为.
在人类MDD受试者中观察到类似的H3K4me3Q5ser调节模式,在死亡时在AD和AD之间存在差异.

结论:

H3K4me3Q5ser在大脑中压力介导的转录和行为可塑性中发挥着关键作用.
血清素通过一种独立于直接神经传递的机制影响压力和抗抑郁药物反应.
这些发现为MDD病理生理学提供了新的见解,并可能为开发新的治疗策略提供信息.

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