title: [Relationship of vitamin D receptor polymorphism with breast cancer].
abstract: OBJECTIVE
  To detect the association between vitamin D receptor polymorphism and breast cancer.
  
  
  METHODS
  Polymerase chain reaction-restriction fragment length polymorphism(PCR-RFLP) method was used. Two restriction fragment length polymorphisms in the 3'region of vitamin D receptor (VDR) gene, Taq I and Apa I, were tested for association with breast cancer risk in 86 females with breast cancer and 134 healthy female controls.
  
  
  RESULTS
  Allele frequencies of the 3'Taq I polymorphism showed a significant association (P=0.0004, OR:5.39,CI:1.81-17.20). The further study of genotype found the association of Tt, tt with breast cancer. The haplotype analysis of Apa I and Taq I showed a linkage disequilibrium between t-allele and A-allele. The frequency of tA haplotype was higher in breast cancer patients than in controls (P=0.001), indicating that tA haplotype is associated with breast cancer. The alleles and haplotype of the two loci had not any difference among the clinical subgroups.
  
  
  CONCLUSIONS
  There is association between vitamin D receptor polymorphism and breast cancer.
authors.affiliation: Department of Epidemiology, Shanghai Medical University, Shanghai 200032, China.
authors.forename: J
authors.initials: J
authors.lastname: Cui
authors.forename: K
authors.initials: K
authors.lastname: Shen
authors.forename: Z
authors.initials: Z
authors.lastname: Shen
authors.forename: F
authors.initials: F
authors.lastname: Jiang
authors.forename: F
authors.initials: F
authors.lastname: Shen
mesh_terms: D000328:Adult; D000368:Aged; D001943:Breast Neoplasms / Q000235:genetics*; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006239:Haplotypes; D006801:Humans; D008875:Middle Aged; D011110:Polymorphism, Genetic; D018167:Receptors, Calcitriol / Q000235:genetics*
chemical_list: D018167:Receptors, Calcitriol