The study was designed to find out the effect of thymoquinone (TQ) alone and combination of TQ + fluoxetine in depression of type-2 diabetic rats. Glucose level was significantly decreased in TQ alone treated group, whereas no significant change was recorded when TQ was combined with fluoxetine. Administration of TQ alone and combination of TQ and fluoxetine significantly decreased immobility time, increased latency to immobility and increased locomotor activity. Treatment with TQ alone significantly decreased level of TBARS, increased GSH and restored the activities of antioxidant enzymes (GPx, GR & CAT). However, TQ and fluoxetine combination reduced TBARS level, increased GSH content but no change in the antioxidant enzymes activities. Inflammatory markers (IL-1β, IL-6 & TNF-α) levels were significantly reduced after the administration of TQ alone and TQ + fluoxetine. The study suggests that combination of TQ and fluoxetine can be used to control depression in type-2 diabetes mellitus.
Keywords: Thymoquinone; depression; fluoxetine; nicotinamide; streptozotocin.