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Detectable clonal mosaicism and its relationship to aging and cancer.
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2012 (Engelska)Ingår i: Nature Genetics, ISSN 1061-4036, E-ISSN 1546-1718, Vol. 44, nr 6, s. 651-658Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

In an analysis of 31,717 cancer cases and 26,136 cancer-free controls from 13 genome-wide association studies, we observed large chromosomal abnormalities in a subset of clones in DNA obtained from blood or buccal samples. We observed mosaic abnormalities, either aneuploidy or copy-neutral loss of heterozygosity, of >2 Mb in size in autosomes of 517 individuals (0.89%), with abnormal cell proportions of between 7% and 95%. In cancer-free individuals, frequency increased with age, from 0.23% under 50 years to 1.91% between 75 and 79 years (P = 4.8 × 10(-8)). Mosaic abnormalities were more frequent in individuals with solid tumors (0.97% versus 0.74% in cancer-free individuals; odds ratio (OR) = 1.25; P = 0.016), with stronger association with cases who had DNA collected before diagnosis or treatment (OR = 1.45; P = 0.0005). Detectable mosaicism was also more common in individuals for whom DNA was collected at least 1 year before diagnosis with leukemia compared to cancer-free individuals (OR = 35.4; P = 3.8 × 10(-11)). These findings underscore the time-dependent nature of somatic events in the etiology of cancer and potentially other late-onset diseases.

Ort, förlag, år, upplaga, sidor
New York: Nature Publishing Group, 2012. Vol. 44, nr 6, s. 651-658
Nationell ämneskategori
Medicinsk genetik
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URN: urn:nbn:se:umu:diva-55639DOI: 10.1038/ng.2270ISI: 000304551100011PubMedID: 22561519OAI: oai:DiVA.org:umu-55639DiVA, id: diva2:528494
Tillgänglig från: 2012-05-25 Skapad: 2012-05-25 Senast uppdaterad: 2018-06-08Bibliografiskt granskad

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Andersson, UlrikaHallmans, GöranHenriksson, RogerMelin, Beatrice S

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