Family-based analysis of vitamin D receptor gene polymorphisms and type 1 diabetes in the population of South Croatia |
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| Authors: | Vesna Boraska Veselin Škrabić Eleftheria Zeggini Christopher James Groves Maja Buljubašić Marijana Peruzović Tatijana Zemunik |
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| Affiliation: | (1) Department of Medical Biology, Medical School, University of Split, 21000 Split, Croatia;(2) Department of Pediatrics, Clinical Hospital Split, 21000 Split, Croatia;(3) Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, UK;(4) Oxford Centre for Diabetes, Endocrinology and Metabolism, University of Oxford, Oxford, UK;(5) Division of Molecular Biology, Ruđer Bošković Institute, University of Zagreb, 10000 Zagreb, Croatia |
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| Abstract: | Type 1 diabetes mellitus (T1DM) is a disease characterised by the autoimmune destruction of insulin-producing pancreatic β cells. Vitamin D is a known immune system modulator and its effects are exerted via the vitamin D receptor (VDR). Several VDR gene single nucleotide polymorphisms (SNPs) have been commonly studied in relation to T1DM. The aim of this study was to evaluate the role of VDR gene variation in T1DM susceptibility by genotyping four SNPs (FokI-rs10735810, TaqI-rs731236, BsmI-rs1544410, and Tru9I-rs757343) in 160 case–parent trio samples from the population of South Croatia. We observed overtransmission of Tru9I allele G and undertransmission of the Tru9I-BsmI A-A haplotype from parents to affected children (P = 0.032, P = 0.002, respectively). These results indicate a possible role of the VDR gene in T1DM aetiology. In conclusion, this family-based study presents some evidence of association of specific VDR gene variants with T1DM in the population of South Croatia. |
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| Keywords: | Type 1 diabetes Vitamin D receptor TDT Polymorphism Genetic epidemiology Croatia |
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