在16p.11.2 GWAS位点调节DOC2A的替代拼接的一个因果编码变体影响了对精神分裂症的易感性
Danyang Zhou1,2,3, Yue Zhang1,2,3, Zhihui Yang1,2
1State Key Laboratory of Genetic Evolution & Animal Models, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China.
Science advances
|January 16, 2026
概括
精神分裂症遗传风险可能来自改变的基因拼接,特别是涉及未注释的DOC2A异型. 这项研究通过将拼接变体与大脑变化和行为缺陷联系起来,揭示了新的疾病机制.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 全基因组关联研究 (GWAS) 已经确定了许多与精神分裂症相关的变异,但它们的潜在生物机制尚不清楚.
- 了解这些遗传变异的功能影响对于阐明精神分裂症发病因子至关重要.
研究的目的:
- 使用转录基因数据研究精神分裂症相关变异的功能机制.
- 识别涉及精神分裂症风险的新型拼接连接和未注释的异型.
- 探索DOC2A基因及其异型在精神分裂症相关表型中的作用.
主要方法:
- 使用人类大脑的转录基因数据,对与精神分裂症相关的单核酸多形态进行了拼接定量性特征位置 (sQTL) 分析.
- 用功能优先级和实验验证来识别关键变异及其相关异型.
- 用小鼠模型来研究DOC2A异形过度表达的行为和突触效应.
- 进行了结构建模和互原子分析,以了解DOC2A异型体之间的功能差异.
主要成果:
- 确定了超过17,000个拼接定量特征位点 (sQTL),与以前未知的拼接连接点相关.
- 同名变体rs3935873与未注释的DOC2A异型 (DOC2A∆Val217-Pro218) 和海马体积密切相关.
- 在小鼠中DOC2A∆Val217-Pro218的过度表达重复了与精神分裂相关的行为缺陷,与全长异型不同.
- 两种DOC2A异形都改变了激发性突触传输,结构建模揭示了∆Val217-Pro218异形的独特配置和独特相互作用器.
结论:
- 对DOC2A基因的失调拼接,特别是未注释的异型DOC2A∆Val217-Pro218,被认为是精神分裂症遗传风险的功能机制.
- 未注释的异构体可以在疾病发病过程中发挥重要作用,并揭示新的疾病相关途径.
- 这项研究强调了考虑替代拼接事件在理解复杂的遗传疾病,如精神分裂症的重要性.
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