title: Molecular pathogenesis of endometriosis; Toll-like receptor-4 A896G (D299G) polymorphism: a novel explanation.
abstract: BACKGROUND
  Endometriosis is a distressing gynecological disorder. Toll-like receptor 4 (TLR4) is specific for recognition of the molecular pattern of gram-negative bacteria. TLR4 is present on the surface of endometrial cells. Their role in the molecular pathogenesis of endometriosis is postulated through a novel explanation.
  
  
  OBJECTIVE
  To study the TLR4 A896G polymorphism in cases of endometriosis and age- and sex-matched healthy controls and evaluate its role in the molecular pathogenesis of endometriosis.
  
  
  METHODS
  Case-control study, involving patients from four gynecological centers from Hyderabad Samples: The study was carried out on 400 women who include 200 surgically confirmed cases of endometriosis and 200 healthy women volunteers in whom endometriosis was excluded by the standard diagnostic criteria.
  
  
  RESULTS
  An association of G allele, GG, and AG genotype of TLR4 A896G polymorphism was seen in cases of endometriosis. "G" allele was found to be significantly associated with endometriosis (odds ratio=4.4827; 95% confidence interval: 2.2829-8.8021; χ(2) p<0.0001). An eightfold increase of endometriosis risk was seen in women who carry GG genotype, whereas AA genotype can be considered as protective in our population.
  
  
  CONCLUSIONS
  TLR4 A896G polymorphism (rs4986790) is a functional polymorphism resulting in hypo-responsiveness of the receptor, thus resulting in peritoneal inflammation. The molecular microenvironment becomes favorable for the endometrial cells to adhere to the peritonium, thereby resulting in the initiation of endometriosis.
authors.affiliation: Department of Genetics and Molecular Medicine, Vasavi Medical and Research Centre, Hyderabad, India.
authors.forename: Madhavi
authors.initials: M
authors.lastname: Latha
authors.forename: Sirisha
authors.initials: S
authors.lastname: Vaidya
authors.forename: Sireesha
authors.initials: S
authors.lastname: Movva
authors.forename: Srinivas
authors.initials: S
authors.lastname: Chava
authors.forename: Sujatha
authors.initials: S
authors.lastname: Govindan
authors.forename: Suresh
authors.initials: S
authors.lastname: Govatati
authors.forename: Manjula
authors.initials: M
authors.lastname: Banoori
authors.forename: Qurratulain
authors.initials: Q
authors.lastname: Hasan
authors.forename: Vijay Lakshmi
authors.initials: VL
authors.lastname: Kodati
mesh_terms: D000483:Alleles; D016022:Case-Control Studies; D004198:Disease Susceptibility; D004715:Endometriosis / Q000175:diagnosis / Q000235:genetics*; D005260:Female; D005787:Gene Frequency; D005838:Genotype; D006801:Humans; D007194:India; D016017:Odds Ratio; D011110:Polymorphism, Genetic; D051197:Toll-Like Receptor 4 / Q000235:genetics*; D044465:White People / Q000235:genetics*
chemical_list: C495345:TLR4 protein, human; D051197:Toll-Like Receptor 4