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Anti-diabetic properties of chromium citrate complex in alloxan-induced diabetic rats
Fang Li1, Xiangyang Wu, Ting Zhao
1School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu, China.
Abstract:
The chromium citrate complex [CrCIT] was synthesized and its structure was determined by infrared, UV-visible and atomic absorption spectroscopy, elemental and thermodynamic analysis. Anti-diabetic activity, oxidative DNA damage capacity and acute oral toxicity of [CrCIT] were investigated and compared with that of chromium trichloride hexahydrate. [CrCIT] was synthesized in a single step reaction by chelating chromium(III) with citric acid in aqueous solution. The molecular formula of [CrCIT] was inferred as CrC(6)H(5)O(7)·4H(2)O. The anti-diabetic activity of the complex [CrCIT] was assessed in alloxan-diabetic rats by daily oral gavage for 3 weeks. The biological activity results showed that the complex at the dose of 0.25-0.75 mg Cr/kg body weight could decrease the blood glucose level and increase liver glycogen level in alloxan-diabetic rats. [CrCIT] had more beneficial influences on the improvement of controlling blood glucose, serum lipid and liver glycogen levels compared with CrCl(3)·6H(2)O. Furthermore, [CrCIT] did not cause oxidative DNA damage under physiologically relevant conditions, and [CrCIT] did not produce any hazardous symptoms or deaths in acute oral toxicity test, showing the LD(50) value for female and male rats were higher than 15.1 g/kg body weight. The results suggested that [CrCIT] might represent a novel and proper chromium supplement with potential therapeutic value to control blood glucose in diabetes.
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