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Am J Psychiatry. 1996 Oct;153(10):1313-7.

Exaggerated platelet reactivity in major depression.

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  • 1Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, GA 30322, USA.

Abstract

OBJECTIVE:

This study investigated whether depressed patients exhibit exaggerated platelet reactivity.

METHOD:

In vivo platelet activation, secretion, and dose-response aggregation were measured in 12 depressed patients and eight normal comparison subjects after overnight bed rest and following orthostatic challenge.

RESULTS:

The depressed patients exhibited increased platelet activation at baseline, demonstrated by increased binding of monoclonal antibody (moAb) annexin V protein reacting with prothrombinase complex binding sites. Following orthostatic challenge, the depressed patients exhibited increases in binding of moAbs PAC1 and anti-LIBS1 against activated glycoprotein IIb/IIIa and GE12 against P-selectin expressed upon secretion. The normal comparison subjects exhibited increases in platelet activation only with GE12.

CONCLUSIONS:

Depressed patients exhibit enhanced baseline platelet activation and responsiveness in comparison with normal subjects. Heightened susceptibility to platelet activation may be a mechanism by which depression is a significant risk factor for ischemic heart and cerebrovascular disease and/or mortality after myocardial infarction.

[PubMed - indexed for MEDLINE]
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