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Iranian Journal of Basic Medical Sciences، جلد ۲۱، شماره ۱۲، صفحات ۱۲۷۵-۱۲۸۰
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| عنوان فارسی |
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| چکیده فارسی مقاله |
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| کلیدواژه‌های فارسی مقاله |
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| عنوان انگلیسی |
Involvement of central opiate receptors in modulation of centrally administered oxytocin-induced antinociception |
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| چکیده انگلیسی مقاله |
Objective(s): Oxytocin is involved in modulation of many brain-mediated functions. In the present study, we investigated the central effects of oxytocin and its receptor antagonist, atosiban on inflammatory pain. The contribution of opiate receptors was explored using non-selective and selective antagonists. Materials and Methods: The fourth ventricle of the brain of anesthetized rats was implanted with a guide cannula. Inflammatory pain in the orofacial region was induced by subcutaneous (SC) injection of formalin into the vibrissa pad, and time duration of face rubbing behavior was measured for 45 min. Results: A typical biphasic pain was observed after formalin injection. This biphasic pain behavior was attenuated by intra-fourth ventricle administration of oxytocin (12.5, 50, and 200 ng/rat). Central prior administration of 400 ng/rat atosiban (an oxytocin receptor antagonist), naloxone (a non-selective opiate receptor antagonist), naloxonazine (a selective µ-opiate receptor antagonist), and nor-binaltorphimine (a selective κ-opiate receptor antagonist), but not naltrindole (a δ-opiate receptor antagonist), prevented oxytocin-induced (200 ng/rat) antinociception. Except for naltrindole, other antagonists increased pain intensity when used alone. Above-mentioned drugs did not alter locomotor activity. Conclusion: Oxytocin, as a neuropeptide neurotransmitter, may be involved in the supraspinal modulation of inflammatory pain through µ- and κ-, but not δ-opiate receptors. |
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| کلیدواژه‌های انگلیسی مقاله |
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| نویسندگان مقاله |
| Amir Erfanparast
Division of Physiology, Department of Basic Sciences, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
| Esmaeal Tamaddonfard
Division of Physiology, Department of Basic Sciences, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
| Sahar Seyedin
Graduated, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
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| نشانی اینترنتی |
http://ijbms.mums.ac.ir/article_11669.html |
| فایل مقاله |
اشکال در دسترسی به فایل - ./files/site1/rds_journals/87/article-87-967904.pdf |
| کد مقاله (doi) |
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| زبان مقاله منتشر شده |
en |
| موضوعات مقاله منتشر شده |
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| نوع مقاله منتشر شده |
Original Article |
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