title: Thrombin-antithrombin III complexes and antithrombin III in amniotic fluid.
abstract: We measured thrombin-antithrombin III (TAT) complexes and antithrombin III (AT III) in amniotic fluid and blood plasma of 39 parturient women. TAT was measured by ELISA. Partigen plates were used for measuring the antigen of AT III, and activity was determined using chromogenic substrate. While AT III activity and AT III antigen were below 20% of plasma values, TAT concentration was 2-4 times higher in amniotic fluid than in blood plasma (over twice at the onset of labour, i.e. 54.2 +/- 26.4 and 20.7 +/- 10.7 ng/ml, and approximately 4 times after childbirth, i.e. 108.9 +/- 49.2 ng/ml in amniotic fluid and 27.8 +/- 13.2 ng/ml in blood plasma, respectively). We have concluded that thrombin generation and TAT formation in amniotic fluid are are of significantly higher intensity than in plasma, and they increase during labour.
authors.affiliation: Department of Propaedeutics of Medicine, University School of Medical Sciences, Bydgoszcz, Poland.
authors.forename: M
authors.initials: M
authors.lastname: Uszyński
authors.forename: A
authors.initials: A
authors.lastname: Kielkowski
authors.forename: W
authors.initials: W
authors.lastname: Uszyński
authors.forename: E
authors.initials: E
authors.lastname: Zekanowska
mesh_terms: D000328:Adult; D000653:Amniotic Fluid / Q000737:chemistry* / Q000201:enzymology; D000990:Antithrombin III / Q000032:analysis* / Q000276:immunology; D001798:Blood Proteins / Q000032:analysis / Q000276:immunology; D002585:Cesarean Section; D005260:Female; D006801:Humans; D007745:Labor Onset; D010447:Peptide Hydrolases / Q000032:analysis*; D049590:Postpartum Period; D011247:Pregnancy; D015842:Serine Proteinase Inhibitors / Q000032:analysis* / Q000276:immunology
chemical_list: D001798:Blood Proteins; D015842:Serine Proteinase Inhibitors; C046193:antithrombin III-protease complex; D000990:Antithrombin III; D010447:Peptide Hydrolases