title: Tissue plasminogen activator and plasminogen activator inhibitors of type 1 and type 2 in the plasma of parturient women.
abstract: Changes in the fibrinolytic system of parturient women have so far been only partially documented. Our main questions were whether and how the concentration of tissue plasminogen activator (tPA) and plasminogen activator inhibitors of type 1 (PAI-1) and type 2 (PAI-2) change in the plasma throughout normal labor. The study group consisted of 38 women with normal pregnancy, delivering at term. The concentration of antigens tPA, PAI-1 and PAI-2 in plasma was tested by enzyme-linked immuno-sorbent assay method, and the activity of PAI-1 by plasmin method. Results were analysed statistically. During labor the level of tPA antigen increases over two times: from 9.3 +/- 4.3 ng/ml before labor, to 23.3 +/- 9.6 ng/ml in the second stage of labor. Changes of PAI-1 antigen as well as its activity though noticeable, were not statistically significant. PAI-2 antigen level increased significantly in the third stage (146.3 +/- 58.7 ng/ml before labor, and 212.2 +/- 75.0 ng/ml after placenta expulsion). In summary the more significant change in the fibrinolytic system during labor is an increase of the level of tPA and PAI-2 antigens, but their peaks appear in different stages of labor. The predominance of PAIs over tPA is maintained throughout the whole labor, though on a lower level as can be inferred from the tPA/PAIs ratio.
authors.affiliation: Department of Propedeutics of Medicine, University School of Medical Sciences, Bydgoszcz, Poland.
authors.forename: M
authors.initials: M
authors.lastname: Uszyński
authors.forename: W
authors.initials: W
authors.lastname: Uszyński
authors.forename: E
authors.initials: E
authors.lastname: Zekanowska
authors.forename: J
authors.initials: J
authors.lastname: Garbacz
authors.forename: A
authors.initials: A
authors.lastname: Kielkowski
authors.forename: Z
authors.initials: Z
authors.lastname: Marcinkowski
mesh_terms: D000328:Adult; D000941:Antigens / Q000097:blood / Q000378:metabolism; D001800:Blood Specimen Collection; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006801:Humans; D007743:Labor, Obstetric / Q000097:blood* / Q000378:metabolism; D010349:Patient Compliance; D017395:Plasminogen Activator Inhibitor 1 / Q000097:blood* / Q000378:metabolism; D017396:Plasminogen Activator Inhibitor 2 / Q000097:blood* / Q000378:metabolism; D011247:Pregnancy / Q000097:blood* / Q000378:metabolism; D010959:Tissue Plasminogen Activator / Q000097:blood* / Q000378:metabolism
chemical_list: D000941:Antigens; D017395:Plasminogen Activator Inhibitor 1; D017396:Plasminogen Activator Inhibitor 2; D010959:Tissue Plasminogen Activator