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Basic and Clinical Neuroscience، جلد ۷، شماره ۳، صفحات ۲۴۹-۲۵۸
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عنوان انگلیسی 5-HT2A Serotonin Receptor Density in Adult Male Rats’ Hippocampus after Morphine-based Conditioned Place Preference
چکیده انگلیسی مقاله Introduction: A close interaction exists between the brain opioid and serotonin (5-HT) neurotransmitter systems. Brain neurotransmitter 5-HT plays an important role in the regulation of reward-related processing. However, a few studies have investigated the potential role of 5-HT2A receptors in this behavior. Therefore, the aim of the present study was to assess the influence of morphine and Conditioned Place Preference (CPP) on the density of 5-HT2A receptor in neurons of rat hippocampal formation. Methods: Morphine (10 mg/kg, IP) was injected in male Wistar rats for 7 consecutive days (intervention group), but control rats received just normal saline (1 mL/kg, IP). We used a hotplate test of analgesia to assess induction of tolerance to analgesic effects of morphine on days 1 and 8 of injections. Later, two groups of rats were sacrificed one day after 7 days of injections, their whole brains removed, and the striatum and PFC immediately dissected. Then, the NR1 gene expression was examined with a semi-quantitative RT-PCR method. Results: Our data showed that the maximum response was obtained with 2.5 mg/kg of morphine. The density of 5-HT2A receptor in different areas of the hippocampus increased significantly at sham-morphine and CPP groups (P< 0.05). On the other hand, the CPP groups had more 5-HT2A receptors than sham-morphine groups and also the sham-morphine groups had more 5-HT2A receptors than the control groups. Conclusion: We concluded that the phenomenon of conditioned place preference induced by morphine can cause a significant increase in the number of serotonin 5-HT2A receptors in neurons of all areas of hippocampus.
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نویسندگان مقاله ربیعی محمدی | rabie mohammadi
department of anatomy, neuroscience research center, faculty of medicine, golestan university of medical sciences, gorgan, iran.

سازمان اصلی تایید شده: دانشگاه علوم پزشکی گلستان (Golestan university of medical sciences)

مهرداد جهانشاهی | mehrdad jahanshahi
department of anatomy, school of anatomy, neuroscience research center, faculty of medicine, golestan university of medical sciences, gorgan, iran.

سازمان اصلی تایید شده: دانشگاه علوم پزشکی گلستان (Golestan university of medical sciences)

سید بهنام الدین جامعی | seyed behnamedin jameie
department of anatomy, school of medicine, iran university of medical sciences, tehran, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (Iran university of medical sciences)

نشانی اینترنتی http://bcn.iums.ac.ir/browse.php?a_code=A-10-93-4&slc_lang=en&sid=en
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کد مقاله (doi)
زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده Behavioral Neuroscience
نوع مقاله منتشر شده Original
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