8-epi-prostaglandin-f2alpha and Depressive-Disorder

Depression is associated with increased morbidity and mortality from cardiovascular and cerebrovascular diseases. Oxidative damage to lipids is one of the key early events in the etiology of atherosclerosis, the pathologic condition that underlies these diseases. The current study examines the pathophysiological consequences of depression by comparing serum levels of F(2α)-isoprostanes (8-iso-PGF(2α)), a biomarker of oxidative damage to lipids, in a group of depressed individuals (n=73) and a matched comparison group (n=72). The depressed group had significantly higher levels of serum 8-iso-PGF(2α), while controlling for age, gender, race, years of education, daily smoking, number of alcoholic drinks per week, average amount of physical activity per week, and body mass index. Analyses using interviewer ratings on the Hamilton Scale revealed that, within the depressed cohort, there was no significant association between the severity of symptoms and levels of 8-iso-PGF(2α), suggesting this is a threshold rather than a dose-response relationship. Results extend on our knowledge of depression and oxidative damage to lipids. In conclusion, oxidative damage to lipid molecules may represent a common pathophysiological mechanism by which depressed individuals become more vulnerable to atherosclerosis and its clinical sequelae.

Topics: Adult; Case-Control Studies; Depressive Disorder; Dinoprost; F2-Isoprostanes; Female; Humans; Lipid Metabolism; Lipid Peroxidation; Lipids; Male; Oxidation-Reduction; Oxidative Stress; Socioeconomic Factors; Stress, Physiological; Young Adult

Oxidative damage and immune-inflammatory activation have been suggested to play a role in depression. The purpose of the study was to investigate possible associations and interactions of these pathophysiological mechanisms in geriatric depression by determining the levels of plasma 8-iso-prostaglandin F(2alpha) (8-iso-PGF(2alpha)) and interleukin-6 (IL-6) in elderly depressed individuals. Subjects over 60 years of age with depression and controls were randomly selected from a population in the community after screening with the Geriatric Depression Scale. Plasma concentrations of 8-iso-PGF2alpha and IL-6 were measured in both groups. Depressed patients had significantly higher mean (+/-S.D.) 8-iso-PGF2alpha levels compared to healthy controls (245.01+/-179.92 pg/ml vs 97.64+/-42.72 pg/ml, respectively). Similarly, the same groups demonstrated significantly elevated IL-6 levels compared with controls (58.73+/-39.90 pg/ml vs 15.41+/-9.27 pg/ml). This study indicates an association between increased levels of plasma 8-iso-PGF2alpha and IL-6 with depressive symptomatology in elderly individuals and indicates the necessity for further investigation, possibly within the framework of an integrated involvement of oxidative damage and inflammation in the pathophysiology of depression in the elderly.

Topics: Age Factors; Aged; Depressive Disorder; Dinoprost; Female; Humans; Inflammation; Interleukin-8; Lipid Peroxidation; Male; Middle Aged; Oxidative Stress; Reference Values; Risk Factors