Effects of Licorice (Glycyrrhiza glabra) on testicular oxidative stress in sleep-deprived male Wistar rats
Background: Sleep deprivation is a public health problem that causes oxidative stress injury. Research evidence agrees that oxidative stress serves as an underlying factor in many chronic debilitating diseases. This study investigated the effect of aqueous Licorice extract (Glycyrrhiza glabra) a medicinal plant with known antioxidant activity on testicular oxidative stress parameters. Methods Twenty-five male Wistar rats were randomly allocated to and administered one of the following treatment regimens daily for five days: CONTROL – Distilled water, Sleep – Deprived (SD) – Distilled water, Sleep Deprived +Sleep Recovery (SD+SR) – Distilled Water, SD+LICORICE (SD+LICORICE) – 150 mg/kg bodyweight of Licorice and Sleep – Deprivation + Sleep-Recovery + Licorice (SD+SR+LICORICE) – 150 mg/kg bodyweight of Licorice. The rats in Sleep – Recovery groups were allowed to sleep in their cages after sleep deprivation protocol for 5 days each treatment regimen had ad libitum access to standard rat chow. After the experiment, the rats were sacrificed and blood was collected. Serum cortisol and testosterone were taken alongside testicular Glutathione, Catalase, and Malondialdehyde. Results Sleep deprivation significantly raised cortisol level and decreased testosterone levels both of which were reversed by licorice administration. Significant reduction in Malondialdehyde (MDA) in rats treated with licorice with a simultaneous increase in both GSH and CAT was also observed. Conclusions The antioxidant activity of licorice (Glycyrrhiza glabra) aqueous extract on the testis of rats exposed to oxidative stress suggests the potential of using this traditional medicinal plant in preventing oxidative injury caused by sleep deprivation.