Perturbation of platelet adhesion to endothelial cells by plasminogen activation in vitro

Hsiun Ing Chen, Yueh I. Wu, Yu Lun Hsieh, Guey Yueh Shi, Meei Jyh Jiang, Wen Chang Chang, Woei Jer Chuang, Wai Ming Kan, Ming Jer Tang, Chauying J. Jen

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


To investigate whether the endothelium-platelet interactions may be altered by plasminogen activation, cultured human umbilical vein endothelial cells (ECs) were treated with tissue-type plasminogen activator (t-PA) in the presence of plasminogen, and platelet adhesion to ECs was subsequently measured by using a tapered flow chamber. Our results demonstrated that platelets adhered more readily to t-PA treated EC monolayer than to the control monolayer at all shear stress levels tested. This phenomenon was treatment time-dependent and dose-dependent, and it could be blocked by adding plasmin inhibitors, such as ε-amino caproic acid and aprotinin. Adherent platelets on t-PA treated EC monolayer underwent more severe shape change than those on the control monolayer. While the extracellular matrix directly treated with t-PA attracted less platelets than the control matrix did, platelet adhesion to the matrix that was produced by t-PA-treated ECs was unaltered. These data suggest that t-PA treatment on ECs compromised antiplatelet-adhesion capability on their apical surface without altering the reactivity of their extracellular matrix towards platelets.

Original languageEnglish
Pages (from-to)934-938
Number of pages5
JournalThrombosis and Haemostasis
Issue number2
Publication statusPublished - Aug 1997
Externally publishedYes

ASJC Scopus subject areas

  • Hematology


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