1. Replication study of ulcerative colitis risk loci in a Lithuanian-Latvian case-control sample
- Author
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Marcis Leja, Hamidreza Saadati, Tobias Balschun, Goda Denapiene, Vytenis Kalibatas, Aleksejs Derovs, Aida Zvirbliene, Eva Ellinghaus, Limas Kupčinskas, Jurgita Skieceviciene, Vibeke Andersen, Algimantas Tamelis, Andre Franke, Laimas Virginijus Jonaitis, Jonas Valantinas, Gediminas Kiudelis, David Ellinghaus, Stefan Schreiber, Gitana Pranculiene, and Algimantas Irnius
- Subjects
Adult ,Male ,Case control ,Population ,Genome-wide association study ,Single-nucleotide polymorphism ,Human leukocyte antigen ,Biology ,Inflammatory bowel disease ,Polymorphism, Single Nucleotide ,PTPN22 ,Risk Factors ,medicine ,Immunology and Allergy ,Humans ,Genetic Predisposition to Disease ,education ,Genetic association ,Genetics ,education.field_of_study ,Gastroenterology ,Protein Tyrosine Phosphatase, Non-Receptor Type 22 ,Odds ratio ,Single nucleotide polymorphisms ,medicine.disease ,Prognosis ,Europe ,Ulcerative colitis ,Case-Control Studies ,Colitis, Ulcerative ,Female ,Lithuanian Latvian ,Biomarkers ,Follow-Up Studies ,Genome-Wide Association Study - Abstract
Background: Differences between populations might be reflected in their different genetic risk maps to complex diseases, for example, inflammatory bowel disease. We here investigated the role of known inflammatory bowel disease associated single nucleotide polymorphisms (SNPs) in a subset of patients with ulcerative colitis (UC) from the Northeastern European countries Lithuania and Latvia and evaluated possible epistatic interactions between these genetic variants. Methods: We investigated 77 SNPs derived from 5 previously published genome-wide association studies for Crohn's disease and UC. Our study panel comprised 444 Lithuanian and Latvian patients with UC and 1154 healthy controls. Single marker case control association and SNP-SNP epistasis analyses were performed. Results: We found 14 SNPs tagging 9 loci, including 21q21.1, NKX2-3, MST1, the HLA region, 1p36.13, IL10, JAK2, ORMDL3, and IL23R, to be associated with UC. Interestingly, the association of UC with previously identified variants in the HLA region was not the strongest association in our study (P = 4.34 × 1023, odds ratio [OR] = 1.25), which is in contrast to all previously published studies. No association with any disease subphenotype was found. SNP-SNP interaction analysis showed significant epistasis between SNPs in the PTPN22 (rs2476601) and C13orf31 (rs3764147) genes and increased risk for UC (P = 1.64 × 1026, OR = 2.44). The association has been confirmed in the Danish study group (P = 0.04, OR = 3.25). Conclusions: We confirmed the association of the 9 loci (21q21.1, 1p36.13, NKX2-3, MST1, the HLA region, IL10, JAK2, ORMDL3, and IL23R) with UC in the Lithuanian Latvian population. SNP-SNP interaction analyses showed that the combination of SNPs in the PTPN22 (rs2476601) and C13orf31 (rs3764147) genes increase the risk for UC.
- Published
- 2013
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