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

Influence of purified apoprotein E on platelet activation induced by serotonin

Serotonin induces platelet activation. Purified apoprotein E of 300 micrograms/ml prevented morphological alterations of blood platelets stimulated with serotonin (5 microM). Lower concentrated apoprotein E showed no such clear effects. These findings suggest that apoprotein E may liter atherosclerosis by suppressing agonist-induced platelet activation.