Biochemical and antioxidants activity of crude, methanol and n-hexane fractions of Vernonia calvoana on streptozotocin induced diabetic rats by Iwara Arikpo Iwara, Godwin Oju Igile, Friday Effiong Uboh, Kelvin Ngwu Elot and Mbeh Ubana Eteng

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ABSTRACT
This study is aimed at evaluating the biochemical effects and antioxidants activity of extracts of Vernoia
calvoana Hook. f (V.C) on STZ induced diabetic rats. Thirty-six rats weighing (100 to 150 g), were
divided into 6 groups of 6 animals each. Groups 1 and 2 representing normal and diabetic controls (NC
and DC), respectively, receiving placebo, while groups 3 to 6 represented diabetic treated, receiving 500
mg/kg body weight (b.w.) metformin, 400 mg/kg b.w. crude, n-hexane and methanol fractions of V.C,
respectively. TreaTment with drug and extracts of V.C showed a decrease in fasting blood glucose (FBG)
in all experimental groups and was significant (p<0.05) on the 7th day of the experimental period, compared to diabetic control. Progressive increase in body weight was observed in all experimental groups compared to DC group. A significant (p<0.05) increase in glutathione peroxidase (GPX) and catalase (CAT) activities were recorded in all experimental treated animal compared to DC and NC. Malondialdehyde (MDA) concentration was observed to decrease significant (p<0.05) in all experimental groups compared to DC. Histopathologically, the changes in pancreatic integrity were consistent with that of biochemical findings. It may be concluded that, extracts of V.C possess potent ameliorative activity against STZ-induced diabetes, via a potential free radical mopping activity.
Keywords: Vernonia calvoana, extracts, diabetes mellitus, antioxidants.

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Department of Biochemistry, Faculty of Basic Medical Sciences, University of Calabar, P. M. B. 1115, Calabar, Nigeria.

Prof Mbeh Eteng

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Mbeh Eteng is a Professor of Biochemistry in the Faculty of University of Calabar. He holds a Ph.D from the University of Calabar (2000). He was Dean of Faculty of Basic Medical Science (2012-2016) and Chairman Committee of Deans (2014-2015). Member Governing Board UCTH, Calabar (2018 -till date). Fellow, Institute of Co-operate Administration. His current area of research is on malaria/prostrate hyperplaxia and medicinal plants research and use in management. He has successfully supervised 25 Ph.Ds.
Get to know more about him and access more of his publications through his personal knowledgebase – http://www.mbeheteng.com.ng

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