title: [Association of tumor necrosis factors-beta gene polymorphism with endometriosis in women in Guangdong Province].
abstract: OBJECTIVE
  To study the polymorphism of +252 site in intron 1 of tumor necrosis factor (TNF)-beta gene in relation to genetic susceptibility of endometriosis.
  
  
  METHODS
  Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) was employed to detect the polymorphism of +252 site in intron 1 of TNF-beta gene in 82 Chinese Han patients with endometriosis in Guangdong Province and 80 Han patients without endometriosis (control group), and the relation between TNF gene polymorphism and the risk of endometriosis was analyzed.
  
  
  RESULTS
  The +252 site of TNF-beta allele and genotype distribution showed significant difference between endometriosis and control groups (Chi2=6.562, P<0.05; chi2=6.562, P<0.05), and relative risk of endometriosis in relation to allele A was increased by 1.793 fold. The risk of endometriosis was 3.33-fold higher in women of AA genotype than those of GG genotype (Chi2=6.562, P<0.05).
  
  
  CONCLUSIONS
  Allele A in TNF-beta gene +252 site can significantly increase the relative risk of endometriosis in women in Guangdong, among which TNF-beta AA genotype might be one of the genetic susceptible factors for endometriosis.
authors.affiliation: Department of Obstetrics and Gynecology, Guangzhou General Hospital of Guangzhou Command, Guangzhou 510010, China. shendx1970@yahoo.com.cn
authors.forename: Min
authors.initials: M
authors.lastname: Luo
authors.forename: Yuan-li
authors.initials: YL
authors.lastname: He
authors.forename: Hong-bin
authors.initials: HB
authors.lastname: Zhang
authors.forename: Dong-xiang
authors.initials: DX
authors.lastname: Shen
authors.forename: Li-li
authors.initials: LL
authors.lastname: Zong
authors.forename: Ting
authors.initials: T
authors.lastname: Guan
mesh_terms: D000328:Adult; D000483:Alleles; D002681:China; D004715:Endometriosis / Q000235:genetics*; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease / Q000235:genetics*; D005838:Genotype; D006801:Humans; D008233:Lymphotoxin-alpha / Q000235:genetics*; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic; D012150:Polymorphism, Restriction Fragment Length
chemical_list: D008233:Lymphotoxin-alpha