Abstract
Memory loss is a complication of diabetes which requires new approaches to its treatment. Shengmai San (SMS) is a famous traditional Chinese formula containing Panax ginseng, Ophiopogon japonicas, and Schisandra chinensis, whereas Radix puerariae has many reported pharmacological uses. In this study the combination, as Jiawei SMS (J-SMS) was screened for its ability to reverse diabetes-associated cognitive decline in rats. This was assessed behaviorally in diabetic rats (Streptozotocin, 45 mg/kg), with biochemical and western blot analysis (Akt and CREB). Diabetic rats showed fasting blood glucose (FBG) in the range of 13-15 mM throughout the study. J-SMS (0.5, 1.5, 4.5 g/kg) treatment significantly improved learning and memory deficit among diabetic rats as evidenced by preference for novel object, reduced escape latency and increased number of platform crossings (p < .05) in the NORT and MWM tests. Treatment with J-SMS also significantly improved the histopathological changes in the diabetic brain and increased the protein expression of AKT and CREB, required for proper memory function (p < .01). This study highlighted that J-SMS can reverse reference and working memory deficit among diabetic rats by modulating AKT and CREB proteins activation. Thus, J-SMS formulation might be possible candidate for further development.
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