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:: Volume 11, Issue 1 (Scientific Journal of Kurdistan University of Medical Sciences 2006) ::
SJKU 2006, 11(1): 1-10 Back to browse issues page
The effect of long term oral administration of Hypericum perforatum aerial part on learning and memory in diabetic rats by means of passive avoidance test
Mehrdad Roghani Dr * 1, Toor Andokht Baluchnejadmojarad Dr2, Farshad Roghani Dehkordi Dr3
1- Associate Professor , mehjour@yahoo.com
2- Associate Professor
3- Assistant Professor
Abstract:   (12394 Views)
ABSTRACT Background and Aim: Diabetes mellitus (especially type I) is accompanied with disturbances in learning, memory, and cognitive skills in the human beings and experimental animals. Considering the potential nootropic effect of the medicinal plant Hypericum perforatum (HP), therefore, this study was conducted to evaluate the effect of long term oral administration of HP aerial part on learning and memory in diabetic rats by use of passive avoidance test. Materials and Methods: In this study, male Wistar diabetic rats were randomly divided into control, HP-treated control, diabetic, and HP-treated diabetic groups. HP treatment continued for 1 to 2 months. For induction of diabetes a single dose of streptozotocin 60mg/kg was injected i.p. Serum glucose level was determined before the study and at the 4th and 8th weeks after the experiment. In addition, for evaluation of learning and memory, initial latency (IL) and step-through latency (STL) were determined after 1 and 2 months using passive avoidance test. Results: One- and two-month administration of HP aerial part at a weight ratio of 1/15 did not show any significant hypoglycemic effect in treated control and diabetic groups. Furthermore, there was a significant increase (p<0.05) in IL in diabetic and HP-treated diabetic groups after two months as compared to control group. In this respect, there was no significant difference between diabetic and HP-treated diabetic groups. In addition, STL significantly increased in HP-treated control group after 1 (p<0.05) and 2 (p<0.05) months in comparison with control group. On the other hand, STL significantly decreased (p<0.05) in diabetic group and significantly increased (p<0.05) in HP-treated diabetic group as compared to control group after two months. Conclusion: In summary, long term oral administration of HP aerial part could enhance the recall capability of stored information in control and diabetic animals. Key words: Hypericum perforatum, Learning and memory, Passive avoidance test, Diabetes mellitus, Streptozotocin, Rat
Keywords: Hypericum perforatum, Learning and memory, Passive avoidance test, Diabetes mellitus, Streptozotocin, Rat
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Type of Study: Research | Subject: General
Received: 2009/10/26
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Volume 11, Issue 1 (Scientific Journal of Kurdistan University of Medical Sciences 2006) Back to browse issues page
مجله علمی دانشگاه علوم پزشکی کردستان Scientific Journal of Kurdistan University of Medical Sciences
مجله علمی دانشگاه علوم پزشکی کردستان Scientific Journal of Kurdistan University of Medical Sciences
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