Letter abstract
Nature Genetics 40, 225 - 231 (2008)
Published online: 13 January 2008 | doi:10.1038/ng.2007.57
Genome-wide analysis of transcript isoform variation in humans
Tony Kwan1,2, David Benovoy1,2, Christel Dias1, Scott Gurd2, Cathy Provencher2, Patrick Beaulieu3, Thomas J Hudson1,2,4, Rob Sladek1,2 & Jacek Majewski1,2
We have performed a genome-wide analysis of common genetic variation controlling differential expression of transcript isoforms in the CEU HapMap population using a comprehensive exon tiling microarray covering 17,897 genes. We detected 324 genes with significant associations between flanking SNPs and transcript levels. Of these, 39% reflected changes in whole gene expression and 55% reflected transcript isoform changes such as splicing variants (exon skipping, alternative splice site use, intron retention), differential 5' UTR (initiation of transcription) use, and differential 3' UTR (alternative polyadenylation) use. These results demonstrate that the regulatory effects of genetic variation in a normal human population are far more complex than previously observed. This extra layer of molecular diversity may account for natural phenotypic variation and disease susceptibility.
- Department of Human Genetics, McGill University, 740 Dr. Penfield, Room 7210, Montréal, Québec H3A 1A4, Canada.
- McGill University and Génome Québec Innovation Centre, 740 Dr. Penfield, Room 7210, Montréal, Québec H3A 1A4, Canada.
- Division of Hematology-Oncology, Research Centre, Sainte-Justine Hospital, Montréal, Québec H3T 1C5, Canada.
- Ontario Institute for Cancer Research, MaRS Centre, South Tower, 101 College Street, Suite 800, Toronto, Ontario M5G 1L7, Canada.
Correspondence to: Jacek Majewski1,2 e-mail: jacek.majewski@mcgill.ca
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