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Grape seed extract and Zinc containing nutritional food supplement delays onset and progression of Streptozocin-induced diabetic cataract in Wistar rats

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Abstract

Prevention of hyperglycemia and enhancement of antioxidant defense mechanisms remain major goals in the treatment of diabetic cataract. Earlier, we reported strong anti-hyperglycemic and in vitro antioxidant potential of the combined formulation of grape seed extract and Zincovit tablets. Therefore, the current study was designed to investigate effects of combined formulation of grape seed extract and Zincovit tablets against streptozocin-induced diabetic cataract in Wistar rats. Adult Wistar rats were selected and diabetes was induced by streptozocin (35 mg/kg, i.p) and divided into four groups (group II-V). The normal control (group I) and streptozocin-induced diabetic cataract control rats received only vehicle. Groups III, IV and V animals received orally 40, 80 and 160 mg/kg of combined formulation of Zincovit tablets with grape seed extract respectively for a period of 150 days. The biochemical pathways involved in the pathogenesis of cataract such as oxidative stress, polyol pathway and alterations in adenosine triphosphate, glucose-6-phosphate dehydrogenase and blood glucose were investigated, to understand the possible mechanism of action of combined formulation of grape seed extract and Zincovit tablets. Rats treated with combined formulation of grape seed extract and Zincovit tablets delayed the progression of diabetic cataract as well as it showed significant alterations in oxidative stress markers along with blood glucose, aldose reductase, glucose-6-phosphate dehydrogenase and adenosine triphosphate level in lens. Over all, the results suggest that single combined formulation of grape seed extract and Zincovit tablets may be of great value in delaying diabetic cataract of human subjects as nutritional food supplement.

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Acknowledgments

All the authors declare that they do not have any conflict of interest. This work was financially supported by Apex Laboratories Private Ltd., Chennai (India) for which authors are grateful.

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Authors and Affiliations

  1. Department of Pharmacology, Melaka Manipal Medical College, Manipal University, Manipal, 576104, Karnataka, India

    Shakta Mani Satyam

  2. Department of Pharmacology, Kasturba Medical College, Manipal University, Manipal, 576104, Karnataka, India

    Laxminaryana Kurady Bairy, Rajadurai Pirasanthan & Rajdip Lalit Vaishnav

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  1. Shakta Mani Satyam
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  2. Laxminaryana Kurady Bairy
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  3. Rajadurai Pirasanthan
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  4. Rajdip Lalit Vaishnav
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Correspondence to Laxminaryana Kurady Bairy.

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Satyam, S.M., Bairy, L.K., Pirasanthan, R. et al. Grape seed extract and Zinc containing nutritional food supplement delays onset and progression of Streptozocin-induced diabetic cataract in Wistar rats. J Food Sci Technol 52, 2824–2832 (2015). https://doi.org/10.1007/s13197-014-1305-y

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  • DOI: https://doi.org/10.1007/s13197-014-1305-y

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