Abstract
Fibrocalculous pancreatic diabetes (FCPD) is an uncommon cause of diabetes, seen mainly in developing countries. A family-based study was carried out in 67 Bangladeshi families, consisting of a proband with FCPD and both parents, to determine whether an association exists between FCPD susceptibility and either the major histocompatiblity complex (MHC) or insulin gene (INS) loci. HLA-DQB1 typing was done using allele-specific primers, and INS was typed using the restriction enzyme HphI. Three microsatellites (TNFa, TNFc and TNFd), from within and flanking the TNF-LT locus, were used for MHC Class IV typing and a PCR-RFLP assay was used to define the −308G/A TNF promoter polymorphism. The extended transmission disequilibrium test (ETDT) was used for statistical analysis. An overall association was observed between FCPD and HLA-DQB1 (P = 0.003), that was largely due to a positive association with HLA-DQB1*0302 and a negative association with HLA-DQB1*0202. Although no association was found between FCPD and TNF-LT microsatellite markers a trend was observed for TNFc (P = 0.037, Pc = 0.15). No association was found between FCPD and INS (P = 0.26). This study confirms an association between FCPD and the MHC using a family-based study design and the stringent ETDT analysis; a novel protective association was found with HLA-DQB1*0202 in Bangladeshi FCPD subjects. The genetic susceptibility to FCPD has features both similar and dissimilar to T1DM.
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Acknowledgements
We express our thanks to the subjects for participating in the study. We also acknowledge the contribution of the International Program in the Chemical Sciences (IPICS), Uppsala University, Sweden, for awarding Fellowships to Zahid Hassan and Zahangir Md. Chowdhury.
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Chowdhury, Z., McDermott, M., Davey, S. et al. Genetic susceptibility to fibrocalculous pancreatic diabetes in Bangladeshi subjects: a family study. Genes Immun 3, 5–8 (2002). https://doi.org/10.1038/sj.gene.6363814
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DOI: https://doi.org/10.1038/sj.gene.6363814
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