单个GWAS风险位中的多个基因协同调解了人类神经元中的异常突触发育和功能
Siwei Zhang1,2, Hanwen Zhang1, Marc P Forrest3,4
1Center for Psychiatric Genetics, NorthShore University HealthSystem, Evanston, IL 60201, USA.
精神分裂症风险变异影响基因表达和神经元功能. 这项研究将遗传风险因素与细胞变化联系起来,揭示了神经精神疾病中的协同基因效应.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 遗传学 是一个
- 干细胞生物学 干细胞生物学
背景情况:
- 通过全基因组关联研究 (GWAS) 确定的遗传风险变异对与疾病相关的细胞表型的功能影响尚不清楚.
- 建立非编码变体与精神分裂症 (SZ) 等复杂疾病之间的机制联系是人类遗传学的关键挑战.
研究的目的:
- 用人类诱导多能干细胞 (hiPSC) 衍生神经元研究精神分裂症风险变异的功能后果.
- 为了确定等位基因特异性调节元素及其对基因表达和神经元功能的影响.
主要方法:
- 利用hiPSC衍生的神经元作为神经发育模型.
- 采用异位基因特异性开放色素 (ASoC) 试验来识别功能变异.
- 进行基因编辑 (SNP编辑) 和基因淘汰实验.
- 分析了转录组变化和细胞表型 (树突复杂性,过度活跃性).
主要成果:
- 在hiPSC衍生神经元中鉴定出多种SZ风险变异,表现出异位基因特异性开放色素 (ASoC).
- 证明了编辑rs2027349 SNP会改变VPS45,AC244033.2和C1orf54.2的表达式.
- 观察到,转录组变化与SZ和其他神经精神疾病有关.
- 发现具有风险等位基因的神经元表现出增加的树突复杂性和多动性.
- 揭示了多个基因在单个局部对细胞表型的非添加协同效应.
结论:
- 在单个GWAS风险位置的多个基因可以对神经功能产生复合效应.
- 在神经精神疾病中提供了非编码GWAS风险变体和与疾病相关的细胞表型之间的机制联系.
- 突出了hiPSC衍生神经元对剖析遗传风险变异的功能影响的实用性.
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