title: [An associated analysis of estrogen receptor 2 gene polymorphism linked with intrahepatic cholestasis of pregnancy].
abstract: OBJECTIVE
  To investigate the relation ship of estrogen receptor 2 gene (ESR2) polymorphism associated with intrahepatic cholestasis of pregnancy (ICP) in Chengdu of China.
  
  
  METHODS
  By polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method, the Rsa I polymorphism in exon 5 and the Alu I polymorphism in exon 8 of ESR2 were detected in 100 pregnant women with ICP (ICP group) and 100 normal pregnant women (control group) in Chengdu.
  
  
  RESULTS
  (1) The frequency of the allele A of Alu I polymorphism in exon 8 was significantly higher in ICP group than in control group (P=0.031, OR=1.975), so did the frequency of the Aa+AA genotypes (P=0.028, OR=2.144). (2) The genotype distributions (rr, Rr and RR) and allele frequencies (r and R) of Rsa I polymorphism in exon 5 were not significantly different between the two groups (P>0.05).
  
  
  CONCLUSIONS
  The Alu I polymorphism in exon 8 of ESR2 may be associated with the susceptibility of ICP in Chengdu. The Aa+AA genotype significantly elevated the risk suffering from the ICP. The Rsa I polymorphism in exon 5 of ESR2 is not associated with the risk getting the ICP in Chengdu.
authors.affiliation: Department of Obstetrics and Gynecology, West China Second Hospital, Sichuan University, Chengdu, Sichuan, 610041 P. R. China. zhanglilxz@163.com
authors.forename: Li
authors.initials: L
authors.lastname: Zhang
authors.forename: Shu-yun
authors.initials: SY
authors.lastname: Liu
authors.forename: Qiang
authors.initials: Q
authors.lastname: Chen
authors.forename: Hai
authors.initials: H
authors.lastname: Zou
authors.forename: Ya-qin
authors.initials: YQ
authors.lastname: Zuo
authors.forename: Xiao-hong
authors.initials: XH
authors.lastname: Xu
authors.forename: Yang-hui
authors.initials: YH
authors.lastname: Chen
mesh_terms: D002780:Cholestasis, Intrahepatic / Q000235:genetics*; D047629:Estrogen Receptor beta / Q000235:genetics*; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease / Q000235:genetics; D005838:Genotype; D006801:Humans; D011110:Polymorphism, Genetic / Q000235:genetics*; D012150:Polymorphism, Restriction Fragment Length; D011247:Pregnancy; D011248:Pregnancy Complications / Q000235:genetics
chemical_list: D047629:Estrogen Receptor beta