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RISS 인기검색어
- 검색키워드
- 저자 : Machiela, Mitchell J. (검색결과 1 건)
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Characterization of Large Structural Genetic Mosaicism in Human Autosomes
Machiela, Mitchell J.,Zhou, W.,Sampson, Joshua N.,Dean, Michael C.,Jacobs, Kevin B.,Black, A.,Brinton, Louise A.,Chang, I.S.,Chen, C.,Chen, C.,Chen, K.,Cook, Linda S.,Crous Bou, M.,De Vivo, I.,Doherty University of Chicago Press [etc.] 2015 American journal of human genetics Vol.96 No.3
Analyses of genome-wide association study (GWAS) data have revealed that detectable genetic mosaicism involving large (>2 Mb) structural autosomal alterations occurs in a fraction of individuals. We present results for a set of 24,849 genotyped individuals (total GWAS set II [TGSII]) in whom 341 large autosomal abnormalities were observed in 168 (0.68%) individuals. Merging data from the new TGSII set with data from two prior reports (the Gene-Environment Association Studies and the total GWAS set I) generated a large dataset of 127,179 individuals; we then conducted a meta-analysis to investigate the patterns of detectable autosomal mosaicism (n = 1,315 events in 925 [0.73%] individuals). Restricting to events >2 Mb in size, we observed an increase in event frequency as event size decreased. The combined results underscore that the rate of detectable mosaicism increases with age (p value = 5.5 x 10<SUP>-31</SUP>) and is higher in men (p value = 0.002) but lower in participants of African ancestry (p value = 0.003). In a subset of 47 individuals from whom serial samples were collected up to 6 years apart, complex changes were noted over time and showed an overall increase in the proportion of mosaic cells as age increased. Our large combined sample allowed for a unique ability to characterize detectable genetic mosaicism involving large structural events and strengthens the emerging evidence of non-random erosion of the genome in the aging population.
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