Abstract
Zinc exerts a wide range of important biological roles. The present study was carried out to investigate the effects of zinc threoninate chelate in blood glucose levels, lipid peroxidation, activities of antioxidant defense systems and nitrite concentration, and histology of the pancreas in diabetic rats. Wistar rats were intravenously injected with a single dose of streptozotocin to induce diabetes. Then, diabetic rats were administrated orally with zinc threoninate chelate (3, 6, and 9 mg/kg body weight) once daily for 7 weeks. Fasting blood glucose was monitored weekly. At the end of the experimental period, the diabetic rats were killed, and levels of serum insulin, malondialdehyde, and nitric oxide, activities of glutathione peroxidase, total superoxide dismutase, copper/zinc-superoxide dismutase, and nitric oxide synthase were determined; pancreas was examined histopathologically as well. Zinc threoninate chelate significantly reduced the blood glucose levels and significantly increased the serum insulin levels in diabetic rats. In addition, zinc threoninate chelate caused a significant increase in activities of antioxidant enzymes and significant decrease in nitrite concentration and malondialdehyde formation in the pancreas and serum of diabetic rats. These biochemical observations were supplemented by histopathological examination of the pancreas. These results suggested that the antidiabetic effect of zinc threoninate chelate may be related to its antioxidative stress ability in diabetic rats.
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Abbreviations
- ZTC:
-
Zinc threoninate chelate
- STZ:
-
Streptozotocin
- Cu/Zn-SOD:
-
Copper/zinc-superoxide dismutase
- FBG:
-
Fasting blood glucose
- GPx:
-
Glutathione peroxidase
- MDA:
-
Malondialdehyde
- NOS:
-
Nitric oxide synthase
- SOD:
-
Superoxide dismutase
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Acknowledgment
This study was supported by the National Nature Science Foundation of China (31071532), the Program for New Century Excellent Talents in University (NCET-12-0749), and Training Project of Young Scientists of Jiangxi Province (Stars of Jinggang). We appreciate the help of the Fourth Affiliated Hospital, Nanchang University with serum insulin assay.
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The authors declare that they have no conflict of interest.
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Zhu, K., Nie, S., Li, C. et al. Antidiabetic and Pancreas-Protective Effects of Zinc Threoninate Chelate in Diabetic Rats may be Associated with its Antioxidative Stress Ability. Biol Trace Elem Res 153, 291–298 (2013). https://doi.org/10.1007/s12011-013-9675-y
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DOI: https://doi.org/10.1007/s12011-013-9675-y