Whole blood serotonin and platelet activation in depressed post-myocardial infarction patients

Life Sciences
Annique SchinsAdriaan Honig

Abstract

Depression is an independent risk factor for post myocardial infarction (MI) mortality. Abnormalities in platelet function have been proposed as one of the mechanisms involved in increased cardiovascular risk among patients with depression post-MI. Depression in somatically healthy patients has been associated with increased platelet activation. Some but not all studies showed changes in blood serotonin level. Increased platelet activation and blood serotonin level have been associated with increased risk of cardiac events in patients with MI. The goal of this study was to investigate whether 1) depressed post-MI patients have higher markers of platelet activation as measured by plasma levels of beta-thromboglobulin (betaTG), platelet factor 4 (PF4) and soluble CD40 ligand (sCD40L) and higher serotonin (5-HT) levels than non-depressed post-MI patients and 2) treatment with the antidepressant mirtazapine decreases platelet activation. In this study, 25 depressed post-MI patients were asked for blood collection before start as well as after 8 weeks treatment with mirtazapine or placebo. The control group (n=22) consisted of non-depressed post-MI patients, matched for age, gender and time elapsed since MI. Plasma levels of betaTG,...Continue Reading

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