Abstract
Backgrounds and aims
The IGR2198a_1 and IGR2096a_1 variants of the IBD5 region were found to be associated with Crohn’s disease (CD) in the Hungarian population, while IGR2230a_1 does not seem to confer risk for the disease. In the present study, our aim was to investigate the statistical interaction of these three IBD5 polymorphisms with the +49 A/G substitution within the cytotoxic T lymphocyte antigen-4 (CTLA4) gene, detected previously as neutral gene variant in Hungarian IBD patients.
Methods
A total of 305 unrelated subjects with CD and 310 healthy controls were genotyped with PCR-RFLP methods.
Results
In contrast with single gene effects, after genotype stratification, the IGR2198a_1 C and IGR2096a_1 T variants were found to confer susceptibility only in subjects with CTLA4 +49 AA genotype (P = 0.008; OR = 1.86 and P = 0.016; OR = 1.74, respectively), for IGR2230a_1 no such effect on disease risk could be demonstrated.
Conclusion
Analysis of specific genotype combinations unfolded a possible association between the CTLA4 +49 A/G substitution and two of the observed IBD5 variants with respect to disease risk.
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Acknowledgements
This work was supported by the Grant of Hungarian Scientific Research Foundation, No. OTKA T 73430. The authors wish to thank Judit Oksai and Edit Papp for their excellent technical assistance.
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Csöngei, V., Járomi, L., Sáfrány, E. et al. Interaction between CTLA4 gene and IBD5 locus in Hungarian Crohn’s disease patients. Int J Colorectal Dis 26, 1119–1125 (2011). https://doi.org/10.1007/s00384-011-1202-z
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DOI: https://doi.org/10.1007/s00384-011-1202-z