通过孟德尔的随机化和全基因组的同地化,推断大脑成像衍生的表型与复杂疾病风险之间的遗传关系
Siying Lin1, Haoyang Zhang2, Mengling Qi3
1Department of Medical Research Center, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, China; School of Computer Science and Engineering, Sun Yat-Sen University, Guangzhou 510006, China.
NeuroImage
|August 14, 2023
概括
大脑成像表型 (IDP) 显示与大脑和心血管疾病有共同的遗传. 门德尔的随机化揭示了IDP可能因果关系地影响重大抑郁症,自闭症,精神分裂症和ALS的风险.
科学领域:
- 神经遗传学 神经遗传学
- 心血管遗传学 心血管遗传学
- 精神病学遗传学 精神病学遗传学
背景情况:
- 脑成像衍生的表型 (IDP) 是大脑和心血管疾病的公认标志物.
- 国内流离失所者和疾病风险之间的遗传重叠,特别是大脑和心血管疾病的风险,尚不清楚.
- 这种知识差距限制了IDPs用于预测诊断的使用.
研究的目的:
- 研究大脑内部流离失所者与各种大脑和心血管疾病之间的遗传关联和因果关系.
- 识别导致疾病风险的特定大脑区域和遗传变异.
- 揭示这些疾病背后的共同遗传因素.
主要方法:
- 利用大规模的全基因组关联研究 (GWAS) 对921名脑内流离失所者,20种脑疾病和6种心血管疾病的总结统计数据.
- 采用孟德尔的随机化 (MR) 来评估假设的因果关系.
- 进行了全基因组的同居化分析,并确定了候选基因.
主要成果:
- 多个特定区域的大脑IDP显示了对肌缩性侧面硬化症 (ALS),主要抑郁症 (MDD),自闭症谱系障碍 (ASD) 和精神分裂症 (SCZ) 的风险增加的假定因果关系.
- 叶内脏病发作被确定为高血压的潜在后果.
- 基因组范围的同位化揭示了MDD,ASD和SCZ与大脑IDP共享的遗传区域,识别了与ASD,SCZ和多个IDP相关的新型SNP.
结论:
- 确立了大脑内脏病和主要的大脑和心血管疾病之间的显著遗传关联和假定的因果关系.
- 确定了特定的大脑区域 (如叶) 和与疾病病因学有关的遗传变异.
- 提供了对共享遗传架构的见解,表明大脑的IDPs可以作为疾病风险的预测标记.
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