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논문 기본 정보

자료유형
학술저널
저자정보
Kim Il Bin (CHA University School of Medicine) Kim Myeong-Heui (Korea Advanced Institute of Science and Technology) Jung Saehoon (Korea Advanced Institute of Science and Technology) Kim Woo Kyeong (Korea Advanced Institute of Science and Technology) Lee Junehawk (Korea Institute of Science and Technology Information) Ju Young Seok (Korea Advanced Institute of Science and Technology) Webster Maree J. (Laboratory of Brain Research) Kim Sanghyeon (Laboratory of Brain Research) Kim Ja Hye (University of Ulsan College of Medicine) Kim Hyun Jung (Korea University College of Medicine) Kim Junho (Sungkyunkwan University) Kim Sangwoo (Yonsei University College of Medicine) Lee Jeong Ho (Korea Advanced Institute of Science and Technology)
저널정보
대한생화학·분자생물학회 Experimental and Molecular Medicine Experimental and Molecular Medicine Vol.56
발행연도
2024.8
수록면
1,750 - 1,762 (13page)
DOI
10.1038/s12276-024-01284-1

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초록· 키워드

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Low-level somatic mutations in the human brain are implicated in various neurological disorders. The contribution of low-level brain somatic mutations to autism spectrum disorder (ASD), however, remains poorly understood. Here, we performed high-depth exome sequencing with an average read depth of 559.3x in 181 cortical, cerebellar, and peripheral tissue samples to identify brain somatic single nucleotide variants (SNVs) in 24 ASD subjects and 31 controls. We detected ~2.4 brain somatic SNVs per exome per single brain region, with a variant allele frequency (VAF) as low as 0.3%. The mutational profiles, including the number, signature, and type, were not significantly different between the ASD patients and controls. Intriguingly, when considering genes with low-level brain somatic SNVs and ASD risk genes with damaging germline SNVs together, the merged set of genes carrying either somatic or germline SNVs in ASD patients was significantly involved in ASD-associated pathophysiology, including dendrite spine morphogenesis (p = 0.025), mental retardation (p = 0.012), and intrauterine growth retardation (p = 0.012). Additionally, the merged gene set showed ASD-associated spatiotemporal expression in the early and mid-fetal cortex, striatum, and thalamus (all p < 0.05). Patients with damaging mutations in the merged gene set had a greater ASD risk than did controls (odds ratio = 3.92, p = 0.025, 95% confidence interval = 1.12–14.79). The findings of this study suggest that brain somatic SNVs and germline SNVs may collectively contribute to ASD-associated pathophysiology.

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