title: Vitamin D receptor gene BsmI polymorphisms in Thai patients with systemic lupus erythematosus.
abstract: The immunomodulatory role of 1,25-dihydroxyvitamin D3 is well known. An association between vitamin D receptor (VDR) gene BsmI polymorphisms and systemic lupus erythematosus (SLE) has been reported. To examine the characteristics of VDR gene BsmI polymorphisms in patients with SLE and the relationship of polymorphisms to the susceptibility and clinical manifestations of SLE, VDR genotypings of 101 Thai patients with SLE and 194 healthy controls were performed based on polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). The relationship between VDR gene BsmI polymorphisms and clinical manifestations of SLE was evaluated. The distribution of VDR genotyping in patients with SLE was 1.9% for BB (non-excisable allele homozygote), 21.78% for Bb (heterozygote), and 76.23% for bb (excisable allele homozygote). The distribution of VDR genotyping in the control group was 1.03% for BB, 15.98% for Bb, and 82.99% for bb. There was no statistically significant difference between the two groups (p = 0.357). The allelic distribution of B and b was similar within the groups (p = 0.173). The relationship between VDR genotype and clinical manifestation or laboratory profiles of SLE also cannot be statistically demonstrated. In conclusion, we cannot verify any association between VDR gene BsmI polymorphism and SLE. A larger study examining other VDR gene polymorphisms is proposed.
authors.affiliation: Division of Allergy, Immunology and Rheumatology, Department of Medicine, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Rama 6 Road, Bangkok10400, Thailand.
authors.forename: Wilaiporn
authors.initials: W
authors.lastname: Sakulpipatsin
authors.forename: Oravan
authors.initials: O
authors.lastname: Verasertniyom
authors.forename: Kanokrat
authors.initials: K
authors.lastname: Nantiruj
authors.forename: Kitti
authors.initials: K
authors.lastname: Totemchokchyakarn
authors.forename: Porntawee
authors.initials: P
authors.lastname: Lertsrisatit
authors.forename: Suchela
authors.initials: S
authors.lastname: Janwityanujit
mesh_terms: D000293:Adolescent; D044466:Asian People / Q000235:genetics*; D016022:Case-Control Studies; D015331:Cohort Studies; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D008180:Lupus Erythematosus, Systemic / Q000235:genetics* / Q000503:physiopathology; D011110:Polymorphism, Genetic; D018167:Receptors, Calcitriol / Q000235:genetics*; D013785:Thailand
chemical_list: D018167:Receptors, Calcitriol