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Attenuation of Oxidative Damage in Alloxan Induced Diabetic Rabbits Following Administration of the Extract of the Leaves of Vernonia amygdalina.

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Research Article |

doi:10.5530/ax.2011.3.13 ,
Published Online:

Abstract:
Introduction: Diabetes is a disease that constitutes multiple sources of free radicals, thus oxidative stress is expected to have a double impact. Since oxidative stress is mediated by hyperglycemia-induced generation of free radical, it is supposed that compounds with hypoglycemic and antioxidative properties would be useful antidiabetic agents. Our study investigated the use of V. amygdalina as a potential hypoglycemic and antioxidative agent by testing its effect on the antioxidant biomarkers and lipid peroxidation. Methods: Dried leaves of V. amgydalina were extracted for 48 hrs and freeze dried. Acute toxicity was investigated in 25 rats. Thirty six rabbits were divided into 6 groups: groups I – III were normal; diabetes was induced in groups (IV – VI). Groups I and IV were normal and diabetic controls respectively. The animals were treated with aqueous leaf extract of V. amygdalina. Blood samples were collected and used for the study. Results: The reduction in body weight in the diabetic groups was regained following administration of the extract of V. amgydalina. The extract is considered safe and had little or no effect on blood glucose, MDA and GSH levels of the normal rabbits. Extract significantly reduced glucose and MDA concentrations but increased GSH levels in the diabetic rabbits. Similarly, the extract had no effect on the activities of SOD, CAT and GPx in normal rabbits, however in diabetic rabbits, the enzymes activities increased dose-dependently. Conclusion: This finding provides basis for the use of V. amgydalina as potential antidiabetic antioxidant agent and may be useful for its hypoglycemic property.

Keywords: Diabetes mellitus, Free radical, lipid peroxidation, Oxidative stress, Vernonia amygdalina.

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Free Radical Damage and its Control, Volume 28 (New Comprehensive Biochemistry)

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By : C.A. Rice-Evans, R.H. Burdon

Book Description:

This book provides a comprehensive treatise on the chemical and biochemical consequences of damaging free radical reactions, the implications for the pathogenesis of disease and how this might be controlled endogenously and by radical scavenging drugs. Oxidative stress may be influenced by exogenous agents of oxidative stress, radiation, trauma, drug activation, oxygen excess, or by exogenous oxidative stress which is associated with many pathological states including chronic inflammatory disorders, cardiovascular disease, injury to the central nervous system, and connective tissue damage. This and many other such aspects are presented clearly and in depth.

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Written by najib

May 28th, 2011 at 6:41 am

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Free Radicals and Antioxidant Protocols, 2nd Edition (Methods in Molecular Biology, Vol. 610)

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By : Rao M. Uppu, Subramanyam N. Murthy, William A. Pryor, Narasimham L. Parinandi

In recent years there has been a growing demand to achieve more rapid and accurate detection of RONs (reactive oxygen and nitrogen species), which affect normal physiological processes and pathological conditions, and also of redox stress. In Free Radicals and Antioxidant Protocols, Second Edition, world-renowned researchers respond to this need, considering the most recent analytical and technological aspects of the detection and determination of RONs, and of oxidative, nitrative, nitrosative, and redox stress in biological systems in vivo and in vitro. Chapters include protocols to establish biomarkers for the oxidative stress-induced genetic damage in cellular and animal models, provide novel methods and technologies for analyzing peroxidized lipids, describe techniques for gene therapy, and present methods of EPR imaging of free radicals and oxygen in vivo. Composed in the highly successful Methods in Molecular Biology™ series format, each chapter contains a brief introduction, step-by-step methods, a list of necessary materials, and a Notes section which shares tips on troubleshooting and avoiding known pitfalls. Comprehensive and user-friendly, Free Radicals and Antioxidant Protocols, Second Edition, is an essential guide for the novice and expert researcher alike.

Written by najib

May 28th, 2011 at 6:25 am

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