title: [Relevance of CYP27B1 gene promoter polymorphism to autoimmune thyroid diseases].
abstract: OBJECTIVE
  To investigate the relationship between CYP27B1 gene promoter polymorphism and autoimmune thyroid diseases.
  
  
  METHODS
  A case-control study including 158 patients with Graves' disease (GD), 174 patients with Hashimoto's thyroiditis (HT) and 172 matched controls was conducted. Three genotypes of CYP27 B1 gene -1260 site (CC, AA and AC) were determined by restriction fragment length polymorphism (PCR-RFLP) assay and confirmed by sequencing.
  
  
  RESULTS
  The genotypic distribution of CYP27 B1 gene-1260 site showed no deviation from Hardy-Weinberg equilibrium. The genotype and allele frequencies of -1260A/C were CC34.3%, AA19.2%, AC46.5%, C57.6%, and A42.4% in the control group, 48.1%, 13.3%, 38.6%, 67.4%, and 32.6% in GD group, and 47.1%, 10.3%, 42.5%, 68.4%, and 31.6% in HT group, respectively. Significant difference was found in the genotype and allele frequencies in -1260A/C polymorphism between GD and the control groups (Chi2=6.80, P<0.05 for genotype frequencies, and Chi2=6.79, P<0.05 for allele frequencies) and between HT and the control groups (Chi2=8.39, P<0.05 for genotype frequencies, and Chi2=8.71, P<0.05 for allele frequencies).
  
  
  CONCLUSIONS
  CYP27 B1 promoter -1260 polymorphism is associated with GD or HT in Chinese Han population.
authors.affiliation: Department of Endocrinology, Children's Hospital of Chongqing Medical University, Chongqing 400014, China. yangjingnfm@163.com
authors.forename: Jing
authors.initials: J
authors.lastname: Yang
authors.forename: Feng
authors.initials: F
authors.lastname: Xiong
mesh_terms: D015090:25-Hydroxyvitamin D3 1-alpha-Hydroxylase / Q000235:genetics*; D000293:Adolescent; D000483:Alleles; D002648:Child; D005260:Female; D005787:Gene Frequency; D005838:Genotype; D006111:Graves Disease / Q000235:genetics; D050031:Hashimoto Disease / Q000235:genetics; D006801:Humans; D015810:Linkage Disequilibrium; D008297:Male; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic; D012150:Polymorphism, Restriction Fragment Length; D011401:Promoter Regions, Genetic / Q000235:genetics*; D013967:Thyroiditis, Autoimmune / Q000235:genetics*
chemical_list: D015090:25-Hydroxyvitamin D3 1-alpha-Hydroxylase