Two-stage candidate gene study of chromosome 3p demonstrates an association between nonsynonymous variants in the MST1R gene and Crohn's disease

John B. Beckly, Laura Hancock, Alessandra Geremia, J. R.Fraser Cummings, Andrew Morris, Rachel Cooney, Saad Pathan, Changcun Guo, Derek P. Jewell

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    Abstract

    Background: Genomewide linkage studies identified chromosome 3p21 as an IBD locus. Genomewide association studies have supported this locus and the Wellcome Trust Case Control Consortium (WTCCC) study narrowed it to a 0.6 Mb region. Our objectives were to perform a 2-stage candidate gene association study of the 3p locus and to identify linkage disequilibrium (LD) between significant single-nucleotide polymorphisms (SNPs) and an Oxfordshire subset (n = 282) of the WTCCC as well as the HapMap SNPs. Methods: A total of 197 SNPs in 53 genes from the 3p locus were genotyped on the Illumina platform in a screening cohort of 469 Crohn's disease (CD) patients and 461 controls. Significant associations were then genotyped on the iPLEX platform in the original as well as a second cohort of 139 CD patients, 670 ulcerative colitis (UC) patients, and 1131 controls. All cases and controls were Caucasian and from the Oxfordshire region of the UK. Results: An intronic SNP rs1128535 in the TRAIP gene was associated with CD in the screening and validation cohorts (combined [n = 608] P = 0.0004 [corrected 0.002], odds ratio [OR] 0.77, 95% confidence interval [CI], 0.67-0.89]). No association was seen for UC. Epistasis was seen with the common CARD15 mutations (P = 0.00003 [corrected 0.0006], OR 0.48, 95% CI, 0.34-0.68). No LD was demonstrated with the WTCCC SNPs. Strong LD was demonstrated with 2 nonsynonymous HapMap SNPs in the MST1R gene in an adjacent LD block to the peak WTCCC association, suggesting a distinct association signal. Conclusions: The LD with these functional MST1R variants implicate this gene as having a possible role in CD pathogenesis.

    Original languageEnglish
    Pages (from-to)500-507
    Number of pages8
    JournalInflammatory Bowel Diseases
    Volume14
    Issue number4
    DOIs
    Publication statusPublished - 1 Apr 2008

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    Keywords

    • Crohn's disease
    • Genetics
    • Inflammatory bowel disease
    • MST1R
    • TRAIP

    ASJC Scopus subject areas

    • Immunology and Allergy
    • Gastroenterology

    Cite this

    Beckly, J. B., Hancock, L., Geremia, A., Cummings, J. R. F., Morris, A., Cooney, R., Pathan, S., Guo, C., & Jewell, D. P. (2008). Two-stage candidate gene study of chromosome 3p demonstrates an association between nonsynonymous variants in the MST1R gene and Crohn's disease. Inflammatory Bowel Diseases, 14(4), 500-507. https://doi.org/10.1002/ibd.20365