title: Changes in expression of the cyclooxygenase gene in human fetal membranes and placenta with labor.
abstract: OBJECTIVE
  Our objective was to examine the expression of the gene coding for cyclooxygenase, the central enzyme in prostaglandin synthesis, in human placenta and fetal membranes during pregnancy and before and after labor at term.
  
  
  METHODS
  Expression of the gene for cyclooxygenase was examined with Northern hybridization to ribonucleic acid from human placenta throughout pregnancy and human amnion and chorion decidua in the late third trimester.
  
  
  RESULTS
  Expression was undetectable in trophoblast during the first and second trimesters. Expression in amnion and trophoblast increased 3.5- and 2.5-fold, respectively, in association with labor.
  
  
  CONCLUSIONS
  Our results suggest that the increase in prostaglandin synthesis within the uterus that is seen with the onset of labor is associated with an increase in the expression of the gene cyclooxygenase.
authors.affiliation: Action Research Laboratory, University of London, Royal Postgraduate Medical School, England.
authors.forename: P R
authors.initials: PR
authors.lastname: Bennett
authors.forename: D J
authors.initials: DJ
authors.lastname: Henderson
authors.forename: G E
authors.initials: GE
authors.lastname: Moore
mesh_terms: D000650:Amnion / Q000201:enzymology; D015152:Blotting, Northern; D005321:Extraembryonic Membranes / Q000201:enzymology*; D005260:Female; D015870:Gene Expression; D006801:Humans; D007743:Labor, Obstetric / Q000502:physiology*; D010920:Placenta / Q000201:enzymology*; D011247:Pregnancy; D011451:Prostaglandin-Endoperoxide Synthases / Q000235:genetics*; D014327:Trophoblasts / Q000201:enzymology
chemical_list: D011451:Prostaglandin-Endoperoxide Synthases