新皮层微电路细胞类型在精神疾病中的转录病理学
Keon Arbabi1,2, Dwight F Newton3, Hyunjung Oh3
1The Krembil Centre for Neuroinformatics, Centre for Addiction & Mental Health, Toronto, ON, Canada.
Molecular psychiatry
|September 5, 2024
概括
大型抑郁症 (MDD),双相情感障碍 (BD) 和精神分裂症 (SCZ) 在大脑皮层微电路中共享细胞类型特定的基因表达变化. 这些变化,特别是在抑制性内部神经元中,表明这些精神疾病的共同生物学基础.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
- 精神病学是一个精神病学.
背景情况:
- 精神疾病如重度抑郁症 (MDD),双相情感障碍 (BD) 和精神分裂症 (SCZ) 与认知和情绪受损有关.
- 这些功能依赖于皮层微电路中的复杂信息处理.
- 特定的神经元亚型,包括刺激性金字塔神经元 (PYR) 和抑制性内内神经元 (VIP,SST,PVALB),是这些电路的关键组成部分.
研究的目的:
- 研究在MDD,BD和SCZ的皮质微电路中的细胞类型特定的转录性改变.
- 确定这些精神疾病背后的共同和独特的分子变化.
- 探索特定神经元群体中遗传风险变异和转录组变化之间的关系.
主要方法:
- 采用激光捕获微解剖,然后进行RNA测序 (LCM-seq) 进行细胞类型特定的分子分析.
- 分析了76名受试者 (MDD,BD,SCZ和健康对照) 的下阴前带带皮层.
- 来自特定神经元亚型 (VIP,SST,PVALB,表面和深层PYR) 的测序聚合RNA,共计380个批量转录组.
主要成果:
- 识别了数百种不同表达的基因和途径,跨疾病和神经元亚型,主要在内神经元 (特别是PVALB).
- 观察到每种细胞类型的独特DE基因,但在神经元电路形成和维护中参与的基因在疾病中部分重叠.
- 发现细胞类型之间的协调途径变化,在疾病中部分共享,并与已知的精神病GWAS风险变异相吻合.
结论:
- 表明SCZ,BD和MDD中的跨诊断皮质微电路病理.
- 突出了精神疾病的遗传和转录组风险之间的细胞类型特定的趋同.
- 为未来研究细胞电路改变如何导致共享精神病风险提供基础.
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