新技術揭示與自閉症風險基因相關的神經元和神經膠質異常
作者:
小柯機器人發布時間:2020/11/29 22:08:27
美國哈佛大學Paola Arlotta等研究人員合作利用體內Perturb-Seq技術,揭示出與自閉症風險基因相關的神經元和神經膠質異常。2020年11月27日,國際知名學術期刊《科學》發表了這一成果。
研究人員應用了一種可擴展的遺傳篩選方法,叫做體內Perturb-Seq,在功能上評估了35個自閉症譜系障礙/神經發育延遲(ASD/ND)從頭喪失功能的風險基因。使用CRISPR-Cas9,研究人員在子宮內發育小鼠大腦內的這些風險基因中引入了移碼突變,然後對產後大腦中受擾動的細胞進行單細胞RNA測序。
研究人員從神經元和神經膠質細胞分類中鑑定了細胞類型特異性和進化保守的基因模塊。反覆的基因模塊和細胞類型在整個擾動中都受到影響,這代表了跨越ASD/ND風險基因集的關鍵細胞效應。體內Perturb-Seq能夠研究多樣化的突變如何影響發育中生物的細胞類型和狀態。
據介紹,通過人類基因研究確定的疾病風險基因和基因座的數量遠遠超過了系統研究其功能的能力。
附:英文原文
Title: In vivo Perturb-Seq reveals neuronal and glial abnormalities associated with autism risk genes
Author: Xin Jin, Sean K. Simmons, Amy Guo, Ashwin S. Shetty, Michelle Ko, Lan Nguyen, Vahbiz Jokhi, Elise Robinson, Paul Oyler, Nathan Curry, Giulio Deangeli, Simona Lodato, Joshua Z. Levin, Aviv Regev, Feng Zhang, Paola Arlotta
Issue&Volume: 2020/11/27
Abstract: The number of disease risk genes and loci identified through human genetic studies far outstrips the capacity to systematically study their functions. We applied a scalable genetic screening approach, in vivo Perturb-Seq, to functionally evaluate 35 autism spectrum disorder/neurodevelopmental delay (ASD/ND) de novo loss-of-function risk genes. Using CRISPR-Cas9, we introduced frameshift mutations in these risk genes in pools, within the developing mouse brain in utero, followed by single-cell RNA-sequencing of perturbed cells in the postnatal brain. We identified cell type–specific and evolutionarily conserved gene modules from both neuronal and glial cell classes. Recurrent gene modules and cell types are affected across this cohort of perturbations, representing key cellular effects across sets of ASD/ND risk genes. In vivo Perturb-Seq allows us to investigate how diverse mutations affect cell types and states in the developing organism.
DOI: 10.1126/science.aaz6063
Source: https://science.sciencemag.org/content/370/6520/eaaz6063
Science:《科學》,創刊於1880年。隸屬於美國科學促進會,最新IF:41.037