Abstract
Palladium α-lipoic acid (Pd-LA) complex has unique electronic and redox properties that appear to be the key to its physiological effectiveness. A proprietary liquid blend containing Pd-LA as the major component was demonstrated to be effective in improving the activities of mitochondrial enzymes in aged rats. The Pd-LA complex was evaluated for its hypoglycemic effect against the alloxan-induced diabetic model, as well as in the oral glucose tolerance test in rats. The in vitro free radical scavenging activity of Pd-LA was also determined. Administration of Pd-LA (0.5 mL/kg; equivalent to 3.8 mg complexed α-lipoic acid/kg, p.o.) daily for 5 days to alloxan-induced diabetic animals significantly reduced the blood glucose level (P < 0.05). The blood antioxidant status in the diabetic animals was significantly improved by the treatment of Pd-LA (P < 0.05). Similarly, Pd-LA showed significant in vitro antioxidant activity in a concentration-dependent manner. Results of the study conclude that the Pd-LA complex is effective in lowering the blood glucose level and enhancing the declined antioxidant status in diabetic animals. Significant finding(s) of the study include: (i) Pd-LA significantly increased the tolerance of glucose and was also effective in ameliorating hyperglycemia induced by alloxan; (ii) Pd-LA significantly enhanced the activities of blood superoxide dismutase, catalase, glutathione peroxidase and level of glutathione in diabetic animals; and (iii) Pd-LA showed significant in vitro antioxidant activity. This study adds: The therapeutic efficiency of Pd-LA is demonstrated against declined antioxidant status as well as hyperglycemia associated with diabetes.
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