Genetic variation in insulin-like growth factor 2 may play a role in ovarian cancer risk

Celeste Leigh Pearce, Jennifer A Doherty, David J Van Den Berg, Kirsten Moysich, Chris Hsu, Kara L Cushing-Haugen, David V Conti, Susan J Ramus, Aleksandra Gentry-Maharaj, Usha Menon, Simon A Gayther, Paul D P Pharoah, Honglin Song, Susanne K Kjaer, Estrid Hogdall, Claus Hogdall, Alice S Whittemore, Valerie McGuire, Weiva Sieh, Jacek GronwaldKrzysztof Medrek, Anna Jakubowska, Jan Lubinski, Georgia Chenevix-Trench, Jonathan Beesley, Penelope M Webb, Andrew Berchuck, Joellen M Schildkraut, Edwin S Iversen, Patricia G Moorman, Christopher K Edlund, Daniel O Stram, Malcolm C Pike, Roberta B Ness, Mary Anne Rossing, Anna H Wu, AOCS/ACS Study Group

22 Citations (Scopus)

Abstract

The insulin-like growth factor (IGF) signaling axis plays an important role in cancer biology. We hypothesized that genetic variation in this pathway may influence risk of ovarian cancer. A three-center study of non-Hispanic whites including 1880 control women, 1135 women with invasive epithelial ovarian cancer and 321 women with borderline epithelial ovarian tumors was carried out to test the association between tag single-nucleotide polymorphisms (tSNPs) (n = 58) in this pathway and risk of ovarian cancer. We found no association between variation in IGF1, IGFBP1 or IGFBP3 and risk of invasive disease, whereas five tSNPs in IGF2 were associated with risk of invasive epithelial ovarian cancer at P < 0.05 and followed-up one of the associated SNPs. We conducted genotyping in 3216 additional non-Hispanic white cases and 5382 additional controls and were able to independently replicate our initial findings. In the combined set of studies, rs4320932 was associated with a 13% decreased risk of ovarian cancer per copy of the minor allele carried (95% confidence interval 0.81-0.93, P-trend = 7.4 × 10-5). No heterogeneity of effect across study centers was observed (phet 5 0.25). IGF2 is emerging as an important gene for ovarian cancer; additional genotyping is warranted to further confirm these associations with IGF2 and to narrow down the region harboring the causal SNP.

Original languageEnglish
JournalHuman Molecular Genetics
Volume20
Issue number11
Pages (from-to)2263-72
Number of pages10
ISSN0964-6906
DOIs
Publication statusPublished - 1 Jun 2011

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