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High-density lipoprotein fails to inhibit serotonin-induced activation of blood platelets

O Pfennig1, B Zhao, S Frye

  • 1Platelet Research Unit, University of Münster, Germany.

High-density lipoprotein (HDL) of 100-400 micrograms/ml did not prevent morphological alterations of human blood platelets treated with serotonin (1-5 microM). Highly concentrated HDL (1,200 micrograms/ml) appeared to activate platelets in vitro. These findings indicate that whole HDL may not inhibit agonist-induced platelet activation.

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