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Abstract Title:

Avocado oil induces long-term alleviation of oxidative damage in kidney mitochondria from type 2 diabetic rats by improving glutathione status.

Abstract Source:

J Bioenerg Biomembr. 2017 Feb 18. Epub 2017 Feb 18. PMID: 28214972

Abstract Author(s):

Omar Ortiz-Avila, María Del Consuelo Figueroa-García, Claudia Isabel García-Berumen, Elizabeth Calderón-Cortés, Jorge A Mejía-Barajas, Alain R Rodriguez-Orozco, Ricardo Mejía-Zepeda, Alfredo Saavedra-Molina, Christian Cortés-Rojo

Article Affiliation:

Omar Ortiz-Avila

Abstract:

Hyperglycemia and mitochondrial ROS overproduction have been identified as key factors involved in the development of diabetic nephropathy. This has encouraged the search for strategies decreasing glucose levels and long-term improvement of redox status of glutathione, the main antioxidant counteracting mitochondrial damage. Previously, we have shown that avocado oil improves redox status of glutathione in liver and brain mitochondria from streptozotocin-induced diabetic rats; however, the long-term effects of avocado oil and its hypoglycemic effect cannot be evaluated because this model displays low survival and insulin depletion. Therefore, we tested during 1 year the effects of avocado oil on glycemia, ROS levels, lipid peroxidation and glutathione status in kidney mitochondria from type 2 diabetic Goto-Kakizaki rats. Diabetic rats exhibited glycemia of 120-186 mg/dL the first 9 months with a further increase to 250-300 mg/dL. Avocado oil decreasedhyperglycemia at intermediate levels between diabetic and control rats. Diabetic rats displayed augmented lipid peroxidation and depletion of reduced glutathione throughout the study, while increased ROS generation was observed at the 3rd and 12th months along with diminished content of total glutathione at the 6th and 12th months. Avocado oil ameliorated all these defects and augmented the mitochondrial content of oleic acid. The beneficial effects of avocado oil are discussed in terms of the hypoglycemic effect of oleic acid and the probable dependence of glutathione transport on lipid peroxidation and thiol oxidation of mitochondrial carriers.

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Sayer Ji
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