Volume 8, Issue 6 (November & December 2017)                   BCN 2017, 8(6): 443-452 | Back to browse issues page

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Ahmadalipour A, Sadeghzadeh J, Samaei S A, Rashidy-Pour A. Protective Effects of Enriched Environment Against Transient Cerebral Ischemia-Induced Impairment of Passive Avoidance Memory and Long-Term Potentiation in Rats. BCN. 2017; 8 (6) :443-452
URL: http://bcn.iums.ac.ir/article-1-860-en.html
1- Research Center of Psychiatry and Behavioral Sciences, Tabriz University of Medical Sciences, Tabriz, Iran.
2- Students Research Committee, Semnan University of Medical Sciences, Semnan, Iran.
3- Neuromuscular Rehabilitation Research Center, Semnan University of Medical Sciences, Semnan, Iran.
4- Laboratory of Learning and Memory, Physiology Research Center, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran.

Introduction: Enriched Environment (EE), a complex novel environment, has been demonstrated to improve synaptic plasticity in both injured and intact animals. The present study investigated the capacity of an early environmental intervention to normalize the impairment of passive avoidance memory and Long-Term Potentiation (LTP) induced by transient bilateral common carotid artery occlusion (2-vessel occlusion, 2VO) in rats. 
Methods: After weaning, young Wistar rats (22 days old) were housed in EE or Standard Environment (SE) for 40 days. Transient (30-min) incomplete forebrain ischemia was induced 4 days before the passive avoidance memory test and LTP induction. 
Results: The transient forebrain ischemia led to impairment of passive avoidance memory and LTP induction in the Perforant Path-Dentate Gyrus (PP-DG) synapses. Interestingly, housing and growing in EE prior to 2VO was found to significantly reverse 2VO-induced cognitive and LTP impairments. 
Conclusion: Our results suggest that early housing and growing in EE exhibits therapeutic potential to normalize cognitive and LTP abnormalities induced by 2VO ischemic model in rats.

Type of Study: Original | Subject: Behavioral Neuroscience
Received: 2016/11/3 | Accepted: 2017/02/11 | Published: 2017/11/1

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