Colorectal cancer risk variants at 8q23.3 and 11q23.1 are associated with disease phenotype in APC mutation carriers

Z. Ghorbanoghli*, M. H. Nieuwenhuis, J. J. Houwing-Duistermaat, S. Jagmohan-Changur, F. J. Hes, C. M. Tops, A. Wagner, C. M. Aalfs, S. Verhoef, E. B. Gómez García, R. H. Sijmons, F. H. Menko, T. G. Letteboer, N. Hoogerbrugge, T. van Wezel, H. F A Vasen, J.T. Wijnen

*Corresponding author for this work

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Abstract

Familial adenomatous polyposis (FAP) is a dominantly inherited syndrome caused by germline mutations in the APC gene and characterized by the development of multiple colorectal adenomas and a high risk of developing colorectal cancer (CRC). The severity of polyposis is correlated with the site of the APC mutation. However, there is also phenotypic variability within families with the same underlying APC mutation, suggesting that additional factors influence the severity of polyposis. Genome-wide association studies identified several single nucleotide polymorphisms (SNPs) that are associated with CRC. We assessed whether these SNPs are associated with polyp multiplicity in proven APC mutation carriers. Sixteen CRC-associated SNPs were analysed in a cohort of 419 APC germline mutation carriers from 182 families. Clinical data were retrieved from the Dutch Polyposis Registry. Allele frequencies of the SNPs were compared for patients with

Original languageEnglish
Pages (from-to)563–570
Number of pages8
JournalFamilial Cancer
Volume15
Issue number4
DOIs
Publication statusPublished - Oct 2016

Keywords

  • Cancer genetics
  • Colonic adenomas
  • Familial adenomatous polyposis
  • Genetic polymorphisms

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