Abstract
Nigella orientalis and N. segetalis fixed oils were administered orally (1 mL/kg/day) to Wistar Kyoto rats for 4 weeks. The effects of the oils on biochemical parameters were compared with a control group that received distilled water under identical conditions. LDL-cholesterol level was decreased significantly in both oil groups while serum total cholesterol and VLDL-cholesterol were decreased significantly following administration of only N. orientalis fixed oil when compared with the control group. The HDL-cholesterol levels were increased significantly in both oil groups.N. orientalis fixed oil significantly reduced Aspartateaminotransferase (AST), Alkaline Phosphatase (ALP), bilirubin and urea levels in rats. There was an increase in the albumin, uric acid and mean corpuscular volume (MCV) concentrations, while the mean corpuscular hemoglobin concentration (MCHC) and RDW (red cell distribution width) levels decreased significantly. In N. segetalis fixed oil treated rats, the levels of ALP, Blood Urea Nitrogen (BUN), MCHC, RDW were decreased significantly, whereas a significant increase was found in albumin, fibrinogen, Hematocrit (HCT) and MCV levels. The effects of 4 weeks oral intake of N. orientalis and N. segetalis fixed oils on blood malondialdehyde (MDA) and total antioxidant status (TOS) were also investigated in rats. The study showed that the oils had no significant effect on MDA production. N. orientalis and N. segetalis fixed oils caused a significant increase in the total antioxidant status in rats.
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