کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4345361 1296725 2011 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Receptors involved in the antinociception of intrathecal melatonin in formalin test of rats
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب (عمومی)
پیش نمایش صفحه اول مقاله
Receptors involved in the antinociception of intrathecal melatonin in formalin test of rats
چکیده انگلیسی

The authors examined the antinocicepotive effect of melatonin in a nociceptive state and investigated a possible interaction with adrenergic or cholinergic receptors underlying this effect at the spinal level. Nociception was induced by a subcutaneous injection of 50 μl of a 5% formalin solution to the hindpaw of male Sprague–Dawley rats. The reversal effects of alpha-1 adrenoceptor antagonist (prazosin), alpha-2 adrenoceptor antagonist (yohimbine), muscarinic receptor antagonist (atropine) and nicotinic receptor antagonist (mecamylamine) on the activity of melatonin were assessed. Intrathecal melatonin reduced the flinching response during phase 1 and phase 2 in the formalin test. Intrathecal prazosin, yohimbine, atropine and mecamylamine increased the attenuating flinching response in both phases observed by intrathecal melatonin. Collectively, the present data suggest that intrathecal melatonin attenuates the facilitated state and acute pain evoked by formalin injection. Furthermore, the antinociception of melatonin is mediated through the alpha-1 adrenoceptor, alpha-2 adrenoceptor, muscarinic and nicotinic receptors in the spinal cord.


► Intrathecal melatonin produced antinociceptive effect in the formalin test.
► Spinal alpha-1 and alpha-2 adrenoceptors are involved in the activity of melatonin.
► Spinal muscarinic and nicotinic receptors are involved in the activity of melatonin.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuroscience Letters - Volume 494, Issue 3, 2 May 2011, Pages 207–210
نویسندگان
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