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  • Title: Depressive symptoms and inflammation among heart failure patients.
    Author: Ferketich AK, Ferguson JP, Binkley PF.
    Journal: Am Heart J; 2005 Jul; 150(1):132-6. PubMed ID: 16084159.
    Abstract:
    BACKGROUND: Psychological depression has been linked to heart failure, both an antecedent to and as a risk factor for poor outcomes among patients with existing heart failure. Elevated levels of proinflammatory cytokines have been proposed as a possible physiological link between the 2 conditions. The objective of this study was to examine the proinflammatory cytokines interleukin (IL)-6, IL-1beta, and tumor necrosis factor-alpha (TNFalpha) in heart failure patients with and without elevated symptoms of depression. METHODS: Thirty-two heart failure patients were recruited from an outpatient heart failure clinic. Depressive symptoms were measured with the Beck Depression Inventory (BDI), and a patient was classified as having elevated symptoms of depression if he/she scored > or = 10. The cognitive-affective subscale score of the BDI, which measures depressed mood independent of physical symptoms, was also examined. RESULTS: In the multiple linear regression models controlling for age, sex, smoking, and antidepressant medication use, there was no relation between BDI score and IL-6 (P = .7612) or IL-1beta (P = .8261). However, there was a statistically significant positive relation between BDI score and TNFalpha (P = .0374). There was also a significant relation between an elevated cognitive-affective score and TNFalpha (P = .0322) but no association with IL-6 (P = .8593) or IL-1beta (P = .3737). CONCLUSIONS: The association between TNFalpha and the cognitive-affective subscale, which eliminates the physical signs and symptoms that are shared by depression and heart failure, demonstrates a depression-specific activation of proinflammatory cytokines that may promote disease progression and mortality in patients with heart failure.
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