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增强子表达的群体水平变异鉴定出人类大脑的疾病机制
2022-09-30 23:15

美国西奈山伊坎医学院Panos Roussos小组发现,增强子表达的群体水平变异鉴定出人类大脑的疾病机制。相关论文于2022年9月26日在线发表在《自然—遗传学》杂志上。

通过联合分析大规模的细胞类型特异性转录组和调节组数据,研究人员对30795个神经元和23265个非神经元候选转录增强子进行了汇总。对1382个大脑样本的转录组的检查确定了转录增强子的有力表达。研究人员探讨了基因-增强子的协调性,发现与增强子相关的基因与神经精神疾病密切相关。研究人员确定了基因和增强子的表达定量性状位点(eQTL),并发现增强子eQTL介导了很大一部分的神经精神性状遗传性。将增强子eQTL纳入全转录组关联研究中,这增强了对疾病位点的功能解释。总的来说,这项研究描述了健康和疾病状态下人类大脑皮层的基因-增强子调节组和遗传机制。
 
据介绍,增强子中神经精神疾病风险变异的鉴定强调了了解人脑中增强子功能的群体水平变异的重要性。除了调节组织特异性和细胞类型特异性目标基因的转录,增强子本身也可以被转录。
 
附:英文原文

Title: Population-level variation in enhancer expression identifies disease mechanisms in the human brain

Author: Dong, Pengfei, Hoffman, Gabriel E., Apontes, Pasha, Bendl, Jaroslav, Rahman, Samir, Fernando, Michael B., Zeng, Biao, Vicari, James M., Zhang, Wen, Girdhar, Kiran, Townsley, Kayla G., Misir, Ruth, Brennand, Kristen J., Haroutunian, Vahram, Voloudakis, Georgios, Fullard, John F., Roussos, Panos

Issue&Volume: 2022-09-26

Abstract: Identification of risk variants for neuropsychiatric diseases within enhancers underscores the importance of understanding population-level variation in enhancer function in the human brain. Besides regulating tissue-specific and cell-type-specific transcription of target genes, enhancers themselves can be transcribed. By jointly analyzing large-scale cell-type-specific transcriptome and regulome data, we cataloged 30,795 neuronal and 23,265 non-neuronal candidate transcribed enhancers. Examination of the transcriptome in 1,382 brain samples identified robust expression of transcribed enhancers. We explored gene–enhancer coordination and found that enhancer-linked genes are strongly implicated in neuropsychiatric disease. We identified expression quantitative trait loci (eQTLs) for both genes and enhancers and found that enhancer eQTLs mediate a substantial fraction of neuropsychiatric trait heritability. Inclusion of enhancer eQTLs in transcriptome-wide association studies enhanced functional interpretation of disease loci. Overall, our study characterizes the gene–enhancer regulome and genetic mechanisms in the human cortex in both healthy and diseased states.

DOI: 10.1038/s41588-022-01170-4

Source: https://www.nature.com/articles/s41588-022-01170-4

Nature Genetics:《自然—遗传学》,创刊于1992年。隶属于施普林格·自然出版集团,最新IF:41.307
官方网址:https://www.nature.com/ng/
投稿链接:https://mts-ng.nature.com/cgi-bin/main.plex


本期文章:《自然—遗传学》:Online/在线发表

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