title: Association between vitamin-D receptor gene FokI polymorphism and Graves' disease among Taiwanese Chinese.
abstract: 1,25(OH)(2)D(3), exerting its biological effects through the vitamin-D receptor (VDR), plays a role in the modulation of the human immune system. The aim of this study was to test for the presence of an association between VDR gene polymorphism and the susceptibility to Graves' disease (GD) for Taiwanese Chinese. Using a polymerase chain reaction (PCR)-based restriction analysis, we screened the VDR exon 2 start codon T/C (VDR-FokI) polymorphism to determine the genotypes for 88 GD patients and 90 normal controls. From the genotype analysis, GD patients featured a greater proportion of the CC genotype (44.3%) and a smaller proportion of the TT genotype (12.5%) than was the case for normal controls (CC: 23.3% and TT: 28.9%; chi-squared test, P=0.003). The odds ratios (ORs) for the risk of the CC genotype's appearance compared with the corresponding values for the TT and TC genotypes, for the GD patient group, were, 4.39 (95% confidence interval [CI]: 1.82-10.61) and 2.10 (95% CI: 1.06-4.18), respectively. With respect to the allelic analysis, we observed significantly increased C-allele (65.9%) and decreased T-allele (34.1%) frequencies among GD patients compared to normal controls (C: 47.2% and T: 52.8%; chi-squared test, P=0.002). The OR for the risk of appearance of the C allele in the GD-patient group was 1.93 (95% CI: 1.27-2.95). In conclusion, the VDR-FokI T/C polymorphism might be able to be used as a genetic marker to predict the likelihood of GD development.
authors.affiliation: Department of Medicine, China Medical University Hospital, China Medical University, Taichung, Taiwan.
authors.forename: Rong-Hsing
authors.initials: RH
authors.lastname: Chen
authors.forename: Chwen-Tzuei
authors.initials: CT
authors.lastname: Chang
authors.forename: Huey-Yi
authors.initials: HY
authors.lastname: Chen
authors.forename: Wen-Chi
authors.initials: WC
authors.lastname: Chen
authors.forename: Chang-Hai
authors.initials: CH
authors.lastname: Tsai
authors.forename: Fuu-Jen
authors.initials: FJ
authors.lastname: Tsai
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D044466:Asian People; D015252:Deoxyribonucleases, Type II Site-Specific / Q000235:genetics*; D005260:Female; D005787:Gene Frequency; D005819:Genetic Markers; D020022:Genetic Predisposition to Disease; D006111:Graves Disease / Q000208:ethnology / Q000235:genetics*; D006801:Humans; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide; D018167:Receptors, Calcitriol / Q000235:genetics*; D013624:Taiwan / Q000208:ethnology
chemical_list: D005819:Genetic Markers; D018167:Receptors, Calcitriol; C035042:endodeoxyribonuclease FokI; D015252:Deoxyribonucleases, Type II Site-Specific