Detectable clonal mosaicism from birth to old age and its relationship to cancer.
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We detected clonal mosaicism for large chromosomal anomalies (duplications, deletions and uniparental disomy) using SNP microarray data from over 50,000 subjects recruited for genome-wide association studies. This detection method requires a relatively high frequency of cells with the same abnormal karyotype (>5-10%; presumably of clonal origin) in the presence of normal cells. The frequency of detectable clonal mosaicism in peripheral blood is low (<0.5%) from birth until 50 years of age, after which it rapidly rises to 2-3% in the elderly. Many of the mosaic anomalies are characteristic of those found in hematological cancers and identify common deleted regions with genes previously associated with these cancers. Although only 3% of subjects with detectable clonal mosaicism had any record of hematological cancer before DNA sampling, those without a previous diagnosis have an estimated tenfold higher risk of a subsequent hematological cancer (95% confidence interval = 6-18).
Aged, 80 and over
Genome-Wide Association Study
DNA Copy Number Variations
Published Version (Please cite this version)10.1038/ng.2271
Publication InfoWei, Qingyi; Laurie, Cathy C; Laurie, Cecelia A; Rice, Kenneth; Doheny, Kimberly F; Zelnick, Leila R; ... Weir, Bruce S (2012). Detectable clonal mosaicism from birth to old age and its relationship to cancer. Nature genetics, 44(6). pp. 642-650. 10.1038/ng.2271. Retrieved from https://hdl.handle.net/10161/17978.
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Professor in Population Health Sciences
Qingyi Wei, MD, PhD, Professor in the Department of Medicine, is Associate Director for Cancer Control and Population Sciences, Co-leader of CCPS and Co-leader of Epidemiology and Population Genomics (Focus Area 1). He is a professor of Medicine and an internationally recognized epidemiologist focused on the molecular and genetic epidemiology of head and neck cancers, lung cancer, and melanoma. His research focuses on biomarkers and genetic determinants for the DNA repair deficient phenotype and