title: Prostanoid DP receptor (PTGDR) variants in mothers with post-coital associated preterm births: preliminary observations.
abstract: OBJECTIVE
  To describe prostanoid DP receptor (PTGDR) variants in women with preterm births who admitted to coital activity (CA) within 24 h of labor.
  
  
  METHODS
  To achieve >80% statistical power, a pilot case-control study compared 24 premature births from mothers with CA (Group 1), 30 mothers of premature infants who did not have CA (Group 2 non-coital activity) and 95 non-coital activity mothers with term births (Group 3 controls). Four functional PTDGR single nucleotide polymorphisms (SNPs) were evaluated: T-549C, C-441/T, T-197C and G+1044A. PHASE 2.0.2 and SAS 9.2 were used for analysis.
  
  
  RESULTS
  All SNPs were in Hardy-Weinberg equilibrium in controls. The C-441/T genotype frequency was significantly increased among Group 1 women relative to Group 2 and 3 women (odds ratio (OR): 30.1, 95% confidence interval (CI) 6.9-191 and 25.7 95%CI 25.7-not computible, respectively). Of the possible haplotypes among the groups, the TCTG haplotype (T-549C, C-441/T, T-197C and G+1044A) was significantly more frequent in Group 1 women compared with the control groups (OR 53.4, 95%CI 10.3-554.8).
  
  
  CONCLUSIONS
  A differential genomic pattern of PTGDR polymorphisms was identified in a sub-set of mothers which was associated with an increased risk of post-coital preterm birth.
authors.affiliation: Department of Gynecology and Obstetrics, School of Medicine, Hebrew University, Jerusalem, Israel. granovs@012.net.il
authors.forename: S
authors.initials: S
authors.lastname: Grisaru-Granovsky
authors.forename: G
authors.initials: G
authors.lastname: Altarescu
authors.forename: S
authors.initials: S
authors.lastname: Finci
authors.forename: A
authors.initials: A
authors.lastname: Weintraub
authors.forename: A
authors.initials: A
authors.lastname: Tevet
authors.forename: A
authors.initials: A
authors.lastname: Samueloff
authors.forename: M S
authors.initials: MS
authors.lastname: Schimmel
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D003075:Coitus; D005260:Female; D006239:Haplotypes; D006801:Humans; D016017:Odds Ratio; D020641:Polymorphism, Single Nucleotide; D011247:Pregnancy; D047928:Premature Birth / Q000235:genetics*; D011971:Receptors, Immunologic / Q000235:genetics*; D011982:Receptors, Prostaglandin / Q000235:genetics*; D055815:Young Adult
chemical_list: D011971:Receptors, Immunologic; D011982:Receptors, Prostaglandin; C036293:prostaglandin D2 receptor