Increase in nitric oxide levels and mitochondrial membrane potential in platelets of untreated patients with major depression.
Alterations in platelet activity have been associated with the onset of major depressive disorder (MDD) and with ischemic cardiovascular events through mechanisms that remain unknown. The present study evaluated nitric oxide (NO) levels, mitochondrial membrane potential (PMMP), and P-selectin expression in platelets from 30 untreated MDD patients and 30 matched controls by flow cytometry. In addition, tryptophan and serotonin concentrations were measured in the whole blood by high performance liquid chromatography. Patients were assessed with the Mini International Neuropsychiatric Interview and the Hamilton Depression Rating Scale. The patients had not had antidepressant treatment or any other pharmacological interventions for at least 1 year. MDD patients significantly differed from controls in levels of major fluorescent platelets for NO, PMMP, and P-selectin compared with those observed in control subjects. Serotonin concentrations in MDD patients did not differ from those in controls These results demonstrate that untreated MDD patients show increased platelet activation, suggesting an alteration in the platelet function.
Instituto Nacional de Psiquiatría "Ramón de la Fuente", Mexico; Hospital Ginecología No. 3, Centro Médico "La Raza", Instituto Mexicano del Seguro Social, Mexico.
Julia
J
Moreno
Enrique
E
Gaspar
Guadalupe
G
López-Bello
Eliuth
E
Juárez
Susana
S
Alcázar-Leyva
Eva
E
González-Trujano
Lenin
L
Pavón
Noé
N
Alvarado-Vásquez
D000293:Adolescent; D000328:Adult; D002851:Chromatography, High Pressure Liquid; D003865:Major Depressive Disorder / Q000097:blood* / Q000503:physiopathology*; D005260:Female; D005434:Flow Cytometry; D006801:Humans; D008297:Male; D053078:Membrane Potential, Mitochondrial / Q000502:physiology*; D009569:Nitric Oxide / Q000097:blood*; D019007:P-Selectin / Q000097:blood*; D011569:Psychiatric Status Rating Scales; D012701:Serotonin / Q000097:blood; D014364:Tryptophan / Q000097:blood; D055815:Young Adult
D019007:P-Selectin; D009569:Nitric Oxide; D012701:Serotonin; D014364:Tryptophan
Major depressive disorder; Mitochondria; Nitric oxide synthesis; Platelet mitochondrial membrane potential; Platelets