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Effect of alteplase on platelet function and receptor expression.

Jun Lu1,2,3, Peng Hu2,3, Guangyu Wei4

  • 11 The First School of Clinical Medicine, Nanjing Medical University, Nanjing, Jiangsu Province, China.

The Journal of International Medical Research
|February 26, 2019
PubMed
Summary

Alteplase, a thrombolytic drug, inhibits platelet aggregation and clot retraction. This effect occurs without altering platelet activation or surface receptor levels, suggesting a specific impact on platelet function.

Keywords:
Alteplaseactivationclot retractionplatelet aggregationsurface receptors

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Area of Science:

  • Pharmacology
  • Hematology
  • Biochemistry

Background:

  • Alteplase is a widely used thrombolytic medication.
  • Understanding its effects on platelet function is crucial for clinical applications.

Purpose of the Study:

  • To investigate the specific role of alteplase in human platelet function.
  • To analyze the impact of alteplase on platelet aggregation, activation, and clot retraction.

Main Methods:

  • Human platelets were treated with varying concentrations of alteplase.
  • Platelet aggregation was measured using light transmittance aggregometry in response to agonists like ADP and collagen.
  • Platelet activation markers and surface receptor levels (GPIbα, GPVI, αIIbβ3) were assessed via flow cytometry.

Main Results:

  • Alteplase demonstrated dose-dependent inhibition of platelet aggregation induced by ADP, collagen, and epinephrine.
  • No significant effect was observed on platelet aggregation stimulated by ristocetin or arachidonic acid.
  • Platelet activation markers (P-selectin, PAC-1 binding) and surface receptor levels remained unchanged.
  • Alteplase treatment led to reduced thrombin-mediated clot retraction.

Conclusions:

  • Alteplase exerts an inhibitory effect on platelet aggregation and clot retraction.
  • These effects are achieved without compromising overall platelet activation or the expression of key surface receptors.
  • The findings provide insights into the nuanced mechanisms of alteplase action on hemostasis.