Aim. The objective of this study was to investigate the effect of Nigella sativa (NS) in experimental bacterial rhinosinusitis. Material and Methods.Bacterial rhinosinusitis was induced with Staphylococcus aureus. Rabbits were divided into control, NS 50, NS 100 and NS 200 mg/kg/d groups. NS was given orally for 7 days. The same volume of normal saline was given as a vehicle to the control group for the same period. At 7 days post-treatment, mucosal samples were excised from the treated and control groups for measurements of superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), myeloperoxidase (MPO) and malondialdehyde (MDA). Conclusion. These findings show that administration of NS increased the SOD, GSH-Px activities and decreased the lipid peroxidation and MPO activity in experimental rhinosinusitis in rabbits. NS prevented oxidative stress by scavenging reactive oxygen species generated in rhinosinusitis model in rabbits. Results. SOD and GSH-Px activities significantly increased in the NS

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This paper investigates the antidiabetic and antioxidant effects of olive leaf extract (OLE) prepared in ethanol upon Streptozotocin (STZ)-induced diabetic rats. The rats were divided into five groups (control, OLE, 40 mg/kg STZ, 0.25 g/kg OLE + STZ, and 0.5 g/kg OLE + STZ). The blood of rats was taken for determination of glucose levels besides oxidative activities (superoxide dismutase-SOD, glutathione peroxidase-GPx, glutathione-S transferase-GST activities, and malondialdehyde-MDA) and biochemical parameters (alanine transaminase-ALT, aspartate transaminase-AST, and alkaline phosphatase-ALP). While ALP, AST, ALT, and MDA levels showed an increase, SOD, GPx, and GST levels decreased in Group STZ compared to Control Group. When compared to the group given only STZ, OLE played a significant role in decreasing MDA, ALT, AST, and ALP levels, apart from increasing GPx, and GST following treatment of diabetic rats. As a result, the in vivo data obtained have shown that the OLE has an antidiabetic effect thanks to restricting oxidative stress and reinforcing antioxidant activities.

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