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Characterization of Large Structural Genetic Mosaicism in Human Autosomes
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2015 (Engelska)Ingår i: American Journal of Human Genetics, ISSN 0002-9297, E-ISSN 1537-6605, Vol. 96, nr 3, s. 487-497Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

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 3 10(-31)) 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.

Ort, förlag, år, upplaga, sidor
2015. Vol. 96, nr 3, s. 487-497
Nationell ämneskategori
Medicinsk genetik
Identifikatorer
URN: urn:nbn:se:umu:diva-102455DOI: 10.1016/j.ajhg.2015.01.011ISI: 000350747800022PubMedID: 25748358OAI: oai:DiVA.org:umu-102455DiVA, id: diva2:814224
Tillgänglig från: 2015-05-26 Skapad: 2015-04-26 Senast uppdaterad: 2018-06-07Bibliografiskt granskad

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Hallmans, GöranHenriksson, Roger

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