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Despite mounting evidence that psychiatric depression heightens risk for cardiac morbidity and mortality, little is known about the mechanisms responsible for this association. The present study examined the relation between depression and the expression of inflammatory risk markers implicated in the pathogenesis of coronary heart disease (CHD). One hundred adults were enrolled (68% women, 48% Caucasian, 48% African-American, mean age 30 ± 2 years). Fifty subjects met the diagnostic criteria for clinical depression; the remaining 50 were demographically matched controls with no history of psychiatric illness. All subjects were in excellent health, defined as having no acute infectious disease, chronic medical illness, or regular medication regimen aside from oral contraceptives. The depressed subjects exhibited significantly higher levels of the inflammatory markers C-reactive protein (3.5 ± 0.5 vs 2.5 ± 5 …