多原子定量特征位置链接串联重复大小变异与人类大脑中的基因调节
Ya Cui1, Frederick J Arnold2, Jason Sheng Li3
1Division of Computational Biomedicine, Department of Biological Chemistry, University of California, Irvine, Irvine, CA, USA. yac7@uci.edu.
串联重复 (TR) 大小变化影响大脑基因调节和神经疾病风险. 这项研究绘制了数以百万计的TR分子定量特征位点 (TR-xQTLs),揭示了TRs是脑疾病的潜在因果变体.
科学领域:
- 基因组学就是基因组学.
- 神经科学是一个神经科学.
- 分子生物学分子生物学
背景情况:
- 串联重复 (TR) 大小变化与大约50种神经系统疾病有关.
- 对于TR变异对人类大脑内基因调节的确切影响尚不清楚.
研究的目的:
- 量化TR大小变异对人类大脑在多种分子表型中的基因调节的影响.
- 确定与神经疾病风险相关的TRs,并探索它们的调节作用.
主要方法:
- 分析了来自1,597名捐赠者的4,412个多omics样本,其中包括1,586名新测序的个人.
- 识别和精细映射TR分子定量特征位点 (TR-xQTLs).
- 在体外实验和同居分析以确认因果调节效应.
主要成果:
- 鉴定了大约220万个TR-xQTLs,将约139,000个独特的TRs与分子表型联系起来.
- 发现了约18,700个TRs作为潜在的因果变异,包括已知的疾病风险TRs,如C9orf72 G2C4扩展.
- 对三个TRs的因果调节效应的实验验证.
- 证据表明TR变异在与大脑相关的表型中的作用,例如NUDT14 3'-UTR TR和PLEKHA1 TG重复.
结论:
- TR大小的变化是人类大脑基因调节和神经疾病的重要因素.
- TR-xQTL映射提供了一种强大的方法来揭示TRs的功能影响.
- 这项研究强调了特定的TRs作为ALS和阿尔茨海默病等疾病的潜在致病因子.
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