title: Different effect of 5,6-trans-prostaglandin E2 on plasminogen activation by urokinase and streptokinase.
abstract: We examined the effects of 5,6-trans-prostaglandin E2 (trans-PG E2) on fibrinolysis and plasminogen activation by either urokinase or streptokinase. trans-PG E2 was found to enhance fibrinolysis induced by urokinase and inhibit the one by streptokinase. These effects were also appeared in the method using synthetic chromogenic substrate S-2251, which suggested that the effects of trans-PG E2 were induced in the circumstances without coagulation factors such as fibrinogen, thrombin or fibrin. Moreover, the enhancement effect of trans-PG E2 on fibrinolysis by urokinase was investigated. The result of SDS-PAGE indicated that plasmin formation rate from plasminogen by urokinase was accelerated in the presence of trans-PG E2. As trans-PG E2 increased the hydrolyzing rate of S-2288 by urokinase, trans-PG E2 directly interacted with urokinase. Therefore, the enhancement effect of trans-PG E2 on plasminogen activation by urokinase could be explained, at least in part, as follows: at first trans-PG E2 directly exerts its effect on urokinase, then it causes the increase of generation rate of plasmin from plasminogen.
authors.affiliation: Department of Analytical Chemistry, School of Pharmaceutical Sciences, Kitasato University, Tokyo, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Urano
authors.forename: C
authors.initials: C
authors.lastname: Ikeda
authors.forename: M
authors.initials: M
authors.lastname: Shimokawa
authors.forename: T
authors.initials: T
authors.lastname: Kinoshita
mesh_terms: D000595:Amino Acid Sequence; D015232:Dinoprostone / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D004789:Enzyme Activation / Q000187:drug effects; D007536:Isomerism; D008969:Molecular Sequence Data; D010958:Plasminogen / Q000187:drug effects / Q000378:metabolism*; D013300:Streptokinase / Q000494:pharmacology*; D014568:Urokinase-Type Plasminogen Activator / Q000494:pharmacology*
chemical_list: D010958:Plasminogen; D013300:Streptokinase; D014568:Urokinase-Type Plasminogen Activator; D015232:Dinoprostone