کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2534336 1559085 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhancement of the hypotensive effects of intrathecally injected endocannabinoids by the entourage compound palmitoylethanolamide
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب سلولی و مولکولی
پیش نمایش صفحه اول مقاله
Enhancement of the hypotensive effects of intrathecally injected endocannabinoids by the entourage compound palmitoylethanolamide
چکیده انگلیسی

The intrathecal (i.t.) injection of 50 and 100 nmol anandamide to urethane anesthetized rats induced a dose-dependent decrease in the mean blood pressure (− 10.6 ± 1.6 mmHg and − 15.0 ± 1.7 mmHg, respectively; n = 6) whereas a lower dose of this endocannabinoid (25 nmol) was devoid of effect. Similar responses were obtained both with the non-metabolizable analog methanandamide and with the endocannabinoid N-arachidonoyldopamine. When the sub-effective dose (25 nmol) of each compound was co-injected with palmitoylethanolamide (100 nmol), significant decreases in the blood pressure were observed (− 12.3 + 1.3 mmHg for anandamide; − 12.1 ± 0.8 mmHg for methanandamide; − 12.1 ± 0.8 mmHg for N-arachidonoyldopamine; n = 4–6). Palmitoylethanolamide also enhanced the hypotensive responses to the 50 nmol-dose of both anandamide and methanandamide. The hypotensive response induced by co-administration of palmitoylethanolamide and 25 nmol anandamide was prevented both by the cannabinoid CB1 receptor antagonist SR 144716A (20 nmol; i.t.) and by the vanilloid TRPV1 receptor antagonist capsazepine (20 nmol; i.t.) and enhanced by pretreatment with URB602 (3.5 nmol; i.t.), a putative inhibitor of palmitoylethanolamide degradation. These results suggest that in the spinal cord palmitoylethanolamide acts as an entourage compound for the hypotensive effects of i.t. administered endocannabinoids. The facilitative action of palmitoylethanolamide affects the vanilloid TRPV1 as well as the cannabinoid CB1 receptor-mediated effects of endocannabinoids on the blood pressure control.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Journal of Pharmacology - Volume 610, Issues 1–3, 21 May 2009, Pages 75–80
نویسندگان
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