Compared ability of garlic (Allium sativum) extract or α‐tocopherol + magnesium association to reduce metabolic disorders and oxidative stress in diabetic rats

Abstract

Since some complications of diabetes mellitus may be caused or exacerbated by an oxidative stress, the protective effects of (1) a garlic (Allium sativum) aqueous extract or (2) a combination of α-tocopherol and magnesium were investigated comparatively in alloxan-diabetic rats. Garlic extract (1 mL of extract corresponding to 300 mg fresh garlic/kg) or α-tocopherol (100 mg/kg) + MgCl(2) (200 mg/kg body weight) were i.p. injected to rats, once a day for 4 weeks. Lipid peroxidation levels and the activities of superoxide-dismutase, catalase and glutathione peroxidase were then measured in liver and pancreas. Under our experimental conditions, garlic extract or α-tocopherol + Mg were found to (1) significantly reduce the plasma levels of glucose, total cholesterol and triglyceride and (2) lactate dehydrogenase, alkaline phosphatase and transaminase activities in blood of diabetic animals. In addition, treatment with garlic extract or α-tocopherol + magnesium appeared to exert an antioxidative activity demonstrated (1) by the increase of catalase, superoxide-dismutase and glutathione-peroxidase activities in liver and pancreas, and (2) a lowering of lipid peroxidation level in these organs. In conclusion, both garlic extract and α-tocopherol + magnesium association were found to alleviate diabetes-associated metabolic disorders and oxidative stress in rats.

Sacha Inchi (Plukenetia volubilis L.) Oil Improves Hepatic Insulin Sensitivity and Glucose Metabolism through Insulin Signaling Pathway in a Rat Model of Type 2 Diabetes

“…This effect may be because of the bioactive compounds in SI. This result is consistent with those of earlier studies (Misawa et al, 2008;Hfaiedh et al, 2011;Kim et al, 2013;Alayón et al, 2018;Eraky et al, 2018;Ajebli and Eddouks, 2019), wherein omega-3 fatty acids decreased the FBG level and improved insulin sensitivity in T2D rats (Eraky et al, 2018). Additionally, -tocopherol was noted to attenuate the blood glucose level in diabetic rats (Hfaiedh et al, 2011) and have a positive effect on insulin sensitivity in HFD-induced obese rats (Kim et al, 2013).…”

Antioxidative Potential of Spices in Experimentally Induced Type-II Diabetes in Rats

“…In this experiment, garlic extract treatment normalizes oxidative stress in streptozotocin induced diabetic rats as observed by Hfaiedh et al, (2011);Madkor et al, (2011). The SOD (antioxidant) level was improved by garlic and these findings were correlated with the findings of Saravanan and Ponmurugan (2010); Ashour et al, (2011).…”