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An Intronic variant of CHD7 Identified in Autism Patients Interferes with Neuronal Differentiation and Development

Neuroscience Bulletin 2021年第8期37卷 1091-1106页

作者： Ran Zhang Hui He Bo Yuan Ziyan Wu Xiuzhen Wang Yasong Du Yuejun Chen Zilong Qiu Institute of Neuroscience State Key Laboratory of NeuroscienceKey Laboratory of Primate NeurobiologyCenter for Excellence in Brain Science and Intelligence TechnologyChinese Academy of SciencesShanghai200031China Shanghai Center for Brain Science and Brain-Inspired Intelligence Technology Shanghai201210China University of the Chinese Academy of Sciences Beijing100049China Shanghai Mental Health Center School of MedicineShanghai Jiao Tong UniversityShanghai200030China

Genetic composition plays critical roles in the pathogenesis of autism spectrum disorder(ASD).Especially,inherited and de novo intronic variants are often seen in patients with ***,the biological significance of intronic variants is difficult to ***,among a Chinese ASD cohort,we identified a recurrent inherited intronic variant in the CHD7 gene,which is specifically enriched in East Asian ***7 has been implicated in numerous developmental disorders including CHARGE syndrome and *** investigate whether the ASD-associated CHD7 intronic variant affects neural development,we established human embryonic stem cells carrying this variant using CRISPR/Cas9 methods and found that the level of CHD7 mRNA significantly decreased compared to *** differentiation towards the forebrain neuronal lineage,we found that neural cells carrying the CHD7 intronic variant exhibited developmental delay and maturity ***,we found that TBR1,a gene also implicated in ASD,was significantly increased in neurons carrying the CHD7 intronic variant,suggesting the intrinsic relevance among ASD ***,the morphological defects found in neurons carrying CHD7 intronic mutations were rescued by knocking down TBR1,indicating that TBR1 may be responsible for the defects in CHD7-related ***,the CHD7 intronic variant generated three abnormal forms of transcripts through alternative splicing,which all exhibited loss-of-function in functional *** study provides crucial evidence supporting the notion that the intronic variant of CHD7 is potentially an autism susceptibility site,shedding new light on identifying the functions of intronic variants in genetic studies of autism.

关键词： Autism CHD7 Intronic variant inherited variant TBR1

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