فهرست مطالب zeghal najiba

The present study aimed to evaluate the hypoglycemic and hypolipidemic activities of Aloe vera mucilage in alloxan-induced diabetic rats. Adult male Wistar rats were assigned into 4 groups (6 rats/group), as follows: the first group (C) served as the controls. The second group of rats (AL) received a single subcutaneous dose of alloxan at 120 mg kg-1bw. These groups received 1 mL of NaCl 9%. The third group (AL+Av) represented diabetic rats treated with 1 mL of mucilage extracted from Aloe vera leaves. The fourth group (C+Av) corresponded to control rats administered with 1 mL of Aloe vera mucilage. NaCl or Aloe vera mucilage were intraparenterally injected to the rats.
Diabetic rats exhibited significant hyperglycemia accompanied by glycosuria. We also observed a significant reduction in the liver weight and glycogen content of the specimen. A reduced level of serum insulin was also observed among diabetic rats. However, the levels of serum triglycerides and total cholesterol increased in alloxan-induced diabetic rats. Aloe vera mucilage administration to diabetic rats partially and totally corrected glycaemia and liver glycogen content and serum insulin level, respectively. The rats’ lipid status has also been improved. Medicinal plants, including Aloe vera, are expected to correct hyperglycemia and hyperlipidemia in diabetic patients to prevent the adverse effects of synthetic drugs.

Acrylamide (ACR) is a dietary contaminant derived from a wide range of foods through the Maillard-reaction during the cooking process. The present study focused on the hematotoxic effects of ACR and the protective efficacy of Extra Virgin olive oil (EVOO) in alleviating hematotoxicity and oxidative stress in erythrocytes of adult rats. Rats were divided into four groups of six each: group 1, serving as negative controls, received distilled water; group 2 received by gavage ACR at a dose of 40 mg/ kg body weight; group 3 received by gavage ACR supplemented with EVOO (300 μL); group 4,serving as positive controls, received only EVOO by gavage. All groups were sacrificed after three weeks. Acrylamide induced a significant increase in white blood cells (WBC), erythrocyte osmotic fragility (OF) and a decrease in red blood cells (RBC), hemoglobin (Hb) and hematocrit (Ht). While mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH) and MCH concentration (MCHC) remained unchanged. Furthermore, exposure of rats to ACR induced erythrocytes oxidative stress with an increase of malondialdehyde, hydrogen peroxide, and protein carbonyls levels. A reduction in antioxidant status, enzymatic (catalase, glutathione peroxidase and superoxide dismutase) and non enzymatic (reduced glutathione, non protein thiols and vitamin C) was observed when compared to controls. EVOO supplementation alleviated significantly hematotoxicity induced by acrylamide as evidenced by restoring the biochemical markers cited above to near normal values. Our results revealed that extra virgin olive oil, a main component of olive Mediterranean diet, was effective in preventing erythrocytes damage and oxidative stress.