Volume 16, Issue 2 (Summer 2012)
Physiol Pharmacol 2012, 16(2): 191-198 |
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Parsa H, moazedi A A, Khajehpour L, pourmehdi M. The effect of intrahippocampal microinjection of Naloxone on short –term and long-term memory in adult male rats. Physiol Pharmacol 2012; 16 (2) :191-198
URL: http://ppj.phypha.ir/article-1-796-en.html
URL: http://ppj.phypha.ir/article-1-796-en.html
Abstract: (11285 Views)
Introduction:The hippocampus is one for the major centers of learning and memory. Role of the opioid system has
been investigated and on the other hand receptors related to this system such as mu-opioid receptors (MOR) are
extended in the hippocampus. In this study the effect of Naloxone administration as a mu opioid receptor antagonist on
passive avoidance memory in adult male rats was investigated by using shuttle box instrument.
Methods:Methods: In this study 45 male adult Wistar rats at range of 200± 20 were used. They were cannulated
after anesthesia and Naloxone 0.5, 1, 1.5 and 2 µg/rat has been injected intrahippocampally after recovery and post
training by shuttle box .Then after 90 minute short –term memory and after 24 hours long- term memory were measured
posttrainingly.
Results:results showed that naloxone0.5, 1, 1.5 and 2µg/rat didn’t affected short – term memory on the other hand
according to results of long-term memory showed that Naloxone 0.5 µg/rat didn’t affected memory and Naloxone 1 and
1.5 µg/rat improved memory and Naloxone 2 µg/rat impaired memory.
Conclusion:Considering to obtained results it seems that Naloxone affected learning and memory in a dose
dependent manner.
Type of Manuscript: Experimental research article |
Subject:
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