对精神分裂症中微质激活的遗传贡献
Marja Koskuvi1,2, Elina Pörsti1, Tristen Hewitt1
1Neuroscience Center, University of Helsinki, Helsinki, Finland.
Molecular psychiatry
|March 23, 2024
概括
精神分裂症 (SCZ) 涉及神经炎症. 受影响的双胞胎的微细胞显示出炎症和细胞外基因表达的改变,但没有明显的功能过活化,这表明SCZ病变发生过程中具有复杂的作用.
科学领域:
- 神经科学是一个神经科学.
- 免疫学 免疫学 免疫学
- 遗传学 是一个遗传学.
背景情况:
- 神经炎症与精神分裂症 (SCZ) 病理生理学有关.
- 微质细胞,大脑免疫细胞,在神经发生和突触功能中发挥作用.
- 异常的微质激活是SCZ的主要假设,但人类细胞模型缺乏.
研究的目的:
- 来自SCZ患者和健康个体的人类诱导的多能干细胞衍生微质细胞的转录和功能差异的研究.
- 利用对SCZ异调的单胞胎双胞胎来建模疾病特异性的微质变化.
- 评估微质对炎症刺激和潜在治疗剂的反应.
主要方法:
- 从SCZ和健康对照对SCZ和健康对照不一致的单胞胎双胞胎中产生人类诱导的多能干细胞衍生的微质细胞.
- 使用RNA测序和英才途径分析 (IPA) 的转录分析.
- 功能性测试评估对互白素-1β (IL1β) 的反应,迁移,细胞和药物治疗 (克洛沙平,米诺环素,硫福拉) 的反应.
主要成果:
- 与对照组相比,受影响双胞胎的微细胞表现出炎症相关基因的表达增加.
- 在受影响的双胞胎微质细胞中观察到对IL1β治疗的反应减少,在迁移或细胞发生方面没有显著差异.
- IPA揭示了细胞外矩阵信号的异常,与ECM相关的GO术语的共享下调和肝纤维化通路激活在受影响和未受影响的双胞胎中. 对MHCII类受体的上调是特定于受影响的双胞胎微质细胞.
结论:
- 精神分裂症患者的微质细胞在炎症和细胞外矩阵通路中显示基因表达异常.
- 尽管基因表达改变了,但没有观察到微质过活化的明显迹象.
- 这些发现表明微质在SCZ病理生理学中具有复杂的,非过度活化的作用,可能涉及改变的信号通路.
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