Elsevier, Diabetes Research and Clinical Practice, 1(77), p. 134-140
DOI: 10.1016/j.diabres.2006.10.018
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Objective: To evaluate the influence of ApaI, BsmI and TaqI polymorphisms of the VDR gene and HLA-DQB1* alleles in type 1 diabetic children and to assess their possible relationship with circulating levels of 25-hydroxyvitamin D3, auto-antibodies, and INFg/TGFb1 cytokines levels in Chilean cases and controls. Methods: DNA and serum samples from 216 newly diagnosed type 1 diabetic and 203 unrelated control children were evaluated for IA-2 and GAD65 auto-antibodies, 25-hydroxyvitamin D3 levels, HLA-DQB1* alleles, and VDR gene polymorphisms. Results: The frequency of the b allele and the bb genotype in type 1 diabetic patients was significantly lower compared with the control group (0.635 versus 0.749, p