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. 2010 Jun;42(3):164-7.
doi: 10.4103/0253-7613.66840.

Antiamnesic effect of stevioside in scopolamine-treated rats

Deepika Sharma  1 , Munish Puri, Ashok K Tiwary, Nirmal Singh, Amteshwar Singh Jaggi
Affiliations

Antiamnesic effect of stevioside in scopolamine-treated rats

Deepika Sharma et al. Indian J Pharmacol. 2010 Jun.

Abstract

The present study was undertaken to explore the potential of stevioside in memory dysfunction of rats. Memory impairment was produced by scopolamine (0.5 mg/kg, i.p.) in animals. Morris water maze (MWM) test was employed to assess learning and memory. Brain acetylcholinestrase enzyme (AChE) activity was measured to assess the central cholinergic activity. The levels of brain thiobarbituric acid-reactive species (TBARS) and reduced glutathione (GSH) were estimated to assess the degree of oxidative stress. Scopolamine administration induced significant impairment of learning and memory in rats, as indicated by a marked decrease in MWM performance. Scopolamine administration also produced a significant enhancement of brain AChE activity and brain oxidative stress (increase in TBARS and decrease in GSH) levels. Pretreatment of stevioside (250 mg/kg dose orally) significantly reversed scopolamine-induced learning and memory deficits along with attenuation of scopolamine-induced rise in brain AChE activity and brain oxidative stress levels. It may be concluded that stevioside exerts a memory-preservative effect in cognitive deficits of rats possibly through its multiple actions.

Keywords: Memory; Morris water-maze; scopolamine; stevioside.

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Conflict of interest statement

Conflict of Interest: None declared.

Figures

Figure 1
Figure 1
Effect of stevioside on scopolamine-induced changes in time spent in target quadrant using Morris water maze. Values are mean ± standard error of means.
Figure 2
Figure 2
Effect of stevioside on scopolamine-induced changes in brain acetylcholinesterase (AChE) activity. Values are mean ± standard err or of means.
Figure 3
Figure 3
Effect of stevioside on scopolamine-induced changes in brain thiobarbituric acid-reactive species (TBARS) levels. Values are mean ± standard error of means.
Figure 4
Figure 4
Effect of stevioside on scopolamine-induced changes in brain reduced glutathione (GSH) levels. Values are mean ± standard error of means.
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