title: Single-nucleotide polymorphism at CYP27B1-1260, but not VDR Taq I, is possibly associated with persistent hepatitis B virus infection.
abstract: BACKGROUND
  Vitamin D, beyond its role in calcium and bone metabolism, exhibits immunomodulatory effects on innate and adaptive immune pathways and is suggestively related to liver diseases.
  
  
  OBJECTIVE
  This study investigated the association of single-nucleotide polymorphisms in genes involved in vitamin D functions with hepatitis B virus (HBV) infection.
  
  
  METHODS
  Five hundred Chinese Han subjects, including 274 chronic HBV patients, 68 HBV infection resolvers, and 158 healthy controls without HBV infection, were studied. The CYP27B1-1260 promoter and the VDR Taq I polymorphisms were genotyped by polymerase chain reaction-restriction fragment length polymorphism.
  
  
  RESULTS
  Although there was no difference between HBV patients and healthy controls, HBV patients and healthy controls had a higher frequency of the CYP27B1-1260 genotype CC (15.0% vs. 2.9%, p=0.004 and 13.3% vs. 2.9%, p=0.006, respectively) and allele C (38.3% vs. 25.7%, p=0.006 and 39.2% vs. 25.7%, p=0.006, respectively) compared with resolvers. The genotype and allele frequencies of the VDR Taq I polymorphism had no difference between patients, resolvers, and healthy controls.
  
  
  CONCLUSIONS
  These results suggest that the CYP27B1-1260 promoter polymorphism is possibly associated with the persistence, but not susceptibility to HBV infection in Chinese HBV patients, and that the VDR Taq I polymorphism is not suggested to be related to chronic HBV infection.
authors.affiliation: Department of Infectious Diseases, First Affiliated Hospital, School of Medicine, Xi'an Jiaotong University, Shaanxi, China.
authors.forename: Qianqian
authors.initials: Q
authors.lastname: Zhu
authors.forename: Na
authors.initials: N
authors.lastname: Li
authors.forename: Qunying
authors.initials: Q
authors.lastname: Han
authors.forename: Zhu
authors.initials: Z
authors.lastname: Li
authors.forename: Guoyu
authors.initials: G
authors.lastname: Zhang
authors.forename: Fang
authors.initials: F
authors.lastname: Li
authors.forename: Pingping
authors.initials: P
authors.lastname: Zhang
authors.forename: Jinghong
authors.initials: J
authors.lastname: Chen
authors.forename: Yi
authors.initials: Y
authors.lastname: Lv
authors.forename: Zhengwen
authors.initials: Z
authors.lastname: Liu
mesh_terms: D015090:25-Hydroxyvitamin D3 1-alpha-Hydroxylase / Q000235:genetics*; D000328:Adult; D044466:Asian People / Q000208:ethnology / Q000235:genetics; D005260:Female; D005787:Gene Frequency; D005838:Genotype; D019694:Hepatitis B, Chronic / Q000208:ethnology / Q000235:genetics*; D006801:Humans; D008297:Male; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*; D018167:Receptors, Calcitriol / Q000235:genetics*; D019914:Taq Polymerase
chemical_list: D018167:Receptors, Calcitriol; D015090:25-Hydroxyvitamin D3 1-alpha-Hydroxylase; D019914:Taq Polymerase