title: Association between FSHR polymorphisms and polycystic ovary syndrome among Chinese women in north China.
abstract: OBJECTIVE
  Polycystic ovary syndrome (PCOS) is a common endocrine disorder disease among women in reproductive-age. Since follicle stimulating hormone (FSH) exerts important biological functions, the association between PCOS and FSH receptor (FSHR) polymorphisms attracts wide attention. The aim of this study was to evaluate whether polymorphisms of FSHR at 307 and 680 codons are associated with PCOS patients in China.
  
  
  METHODS
  Patients with PCOS (n = 215) and controls (n = 205) were recruited from Shanxi Province in north China. They are Han ethnics. Genomic DNA was isolated from the venous blood. The Ala307Thr and Ser680Asn polymorphisms of FSHR were analyzed by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and direct DNA sequencing.
  
  
  RESULTS
  The distributions of genotype and allele of Ala307Thr and Ser680Asn polymorphisms of FSHR were not statistically different between the PCOS patients and the controls. Analysis of the frequency of FSHR polymorphisms showed no statistical difference among the PCOS patients with different obesity standards. Although there were no statistical differences in the most of the endocrine parameters including LH, LH/FSH, E2, P and T as well as the clinical pregnancy rate, there were significant differences in the levels of FSH and PRL among PCOS patients carrying different genotypes of Ala307Thr and Ser680Asn polymorphisms.
  
  
  CONCLUSIONS
  The Ala307Thr and Ser680Asn polymorphisms of FSHR are not associated with PCOS in Han ethnic Chinese women in north China. The FSHR polymorphisms was related to the levels of FSH and PRL but not other PCOS-associated endocrine hormones as well as clinical pregnancy rate in PCOS patients of Han Chinese ethnical population.
authors.affiliation: Center of Reproductive Medicine, Shanxi Women and Children Health Hospital, No. 13, Xin Min Bei Jie, Xinghualing District, 030013, Taiyuan, Shanxi, China, fengye416@126.com.
authors.forename: Xue-qing
authors.initials: XQ
authors.lastname: Wu
authors.forename: Su-ming
authors.initials: SM
authors.lastname: Xu
authors.forename: Jun-fen
authors.initials: JF
authors.lastname: Liu
authors.forename: Xing-yu
authors.initials: XY
authors.lastname: Bi
authors.forename: Yuan-xia
authors.initials: YX
authors.lastname: Wu
authors.forename: Jing
authors.initials: J
authors.lastname: Liu
mesh_terms: D000328:Adult; D000483:Alleles; D002681:China; D005260:Female; D005640:Follicle Stimulating Hormone / Q000097:blood; D056726:Genetic Association Studies; D020022:Genetic Predisposition to Disease; D006801:Humans; D011085:Polycystic Ovary Syndrome / Q000097:blood / Q000235:genetics*; D020641:Polymorphism, Single Nucleotide; D011247:Pregnancy; D011962:Receptors, FSH / Q000235:genetics*
chemical_list: D011962:Receptors, FSH; D005640:Follicle Stimulating Hormone