皮下大脑形态学与儿童和成人自杀企图风险之间的遗传联系
Zuriel Ceja1,2, Luis M García-Marín1,2, I-Tzu Hung3
1Brain & Mental Health Program, QIMR Berghofer Medical Research Institute, Brisbane, Australia.
Human brain mapping
|May 14, 2025
概括
遗传变异影响自杀企图 (SA) 风险和大脑结构. 这项研究发现SA和内体积之间存在共同的遗传联系,以及特定的大脑区域,如内核,从而推进对SA的理解.
科学领域:
- 神经科学是一个神经科学.
- 精神病学是一个精神病学.
- 遗传学 遗传学是一种遗传学.
背景情况:
- 全基因组关联研究 (GWAS) 已经确定了与自杀企图 (SA) 风险和区域大脑体积 (RBVs) 相关的遗传变异.
- 在SA和RBV之间遗传重叠的程度尚不清楚.
- 研究共享的遗传架构对于理解SA的生物基础至关重要.
研究的目的:
- 调查自杀企图 (SA) 和各种区域大脑体积 (RBVs) 之间的共享遗传结构,包括内体积 (ICV) 和皮下结构.
- 确定与SA和RBV相关的特定基因组区域.
- 检查SA多基因分数 (PGS) 与青少年大脑结构表型之间的关联.
主要方法:
- 对SA (N=958,896) 和RBV (N=74,898) 的杆大规模GWAS总结统计.
- 使用链接不平衡得分回归来估计SA和RBV之间的全基因组遗传相关性.
- 在青少年大脑认知发展 (ABCD) 研究中进行了GWAS对分析和功能注释,随后进行了多基因得分 (PGS) 关联分析.
主要成果:
- 在SA和内体积 (ICV) 之间发现了显著的负遗传相关性 (rG = -0.10,p = 1.9×10-3).
- 确定了10个基因组段与SA和至少一个RBV (thalamus,putamen,尾状核) 相关.
- 对SA的较高PGS显着与年轻人较小的右侧核体积相关 (b = -7.05,p = 0.018).
结论:
- 研究结果显示,成年人中SA和ICV之间存在负遗传相关性.
- 表明在不同发育阶段对遗传性SA风险存在明显的神经相关性.
- 突出了SA和大脑结构之间的共同遗传基础,为未来的研究和干预提供了信息.
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