研究發現自閉症譜系障礙的隱性基因突變
作者:
小柯機器人發布時間:2019/7/26 20:38:01
近日,美國波士頓兒童醫院教授Timothy W. Yu及其課題組發現了自閉症譜系障礙的隱性基因紊亂。這一研究成果發表在2019年7月出版的國際學術期刊《Nature Genetics》上。
課題組在一個大的ASD群組中展示了過多的復等位基因功能缺失和破壞性的錯義突變,其比例大約佔總病例的5%的,這當中的10%是女性,與女性的保護作用相一致。研究人員記錄了已知或正在出現的隱性神經發育基因(CA2, DDHD1, NSUN2, PAH, RARB, ROGDI, SLC1A1, USH2A)的復等位基因破壞,以及其他以前未涉及ASD的基因,包括FEV (FEV轉錄因子,ETS家族成員),它編碼血清素能迴路的關鍵調控因子。該數據改進了對隱性突變對ASD的貢獻的估計,並提出了新的途徑來闡明先前未知的導致這種情況的生物學通路。
據介紹,自閉症譜系障礙(ASD)的發病率高達1/59。全基因組關聯和大規模測序研究強烈提示ASD中常見的變異和罕見的新生變異。隱性突變也有牽連,但它們的作用仍不太明確。
附:英文原文
Title: Recessive gene disruptions in autism spectrum disorder
Author: Ryan N. Doan, Elaine T. Lim, Silvia De Rubeis, Catalina Betancur, David J. Cutler, Andreas G. Chiocchetti, Lynne M. Overman, Aubrie Soucy, Susanne Goetze, Christine M. Freitag, Mark J. Daly, Christopher A. Walsh, Joseph D. Buxbaum, Timothy W. Yu
Issue&Volume: Volume 51 Issue 7, July 2019
Abstract: Autism spectrum disorder (ASD) affects up to 1 in 59 individuals. Genome-wide association and large-scale sequencing studies strongly implicate both common variants and rare de novo variants in ASD. Recessive mutations have also been implicated but their contribution remains less well defined. Here we demonstrate an excess of biallelic loss-of-function and damaging missense mutations in a large ASD cohort, corresponding to approximately 5% of total cases, including 10% of females, consistent with a female protective effect. We document biallelic disruption of known or emerging recessive neurodevelopmental genes (CA2, DDHD1, NSUN2, PAH, RARB, ROGDI, SLC1A1, USH2A) as well as other genes not previously implicated in ASD including FEV (FEV transcription factor, ETS family member), which encodes a key regulator of the serotonergic circuitry. Our data refine estimates of the contribution of recessive mutation to ASD and suggest new paths for illuminating previously unknown biological pathways responsible for this condition.
DOI: 10.1038/s41588-019-0433-8
Source: https://www.nature.com/articles/s41588-019-0433-8