The endocannabinoid anandamide inhibits kinin B1 receptor sensitization through

PELOROSSO FG, GAGO JE, DEL REY G, MENÉNDEZ SD, ERRASTI AE, ROTHLIN RP.

EUROPEAN JOURNAL OF PHARMACOLOGY

Elsevier Science

Lugar: Netherlands; Año: 2009 vol. 602 p. 176 - 179

0014-2999

Received 19 September 2008;  revised 7 October 2008;  accepted 29 October 2008.  A vailable online 11 November 2008. Abstract The possible inhibition of kinin B1 receptor up-regulation by arachidonoylethanolamide (anandamide) was evaluated in isolated human umbilical vein. Anandamide and its metabolically stable analogue, R-N-(2-Hydroxy-1-methylethyl)-5Z,8Z,11Z,14Z-eicosatetraenamide (R-(+)-methanandamide), produced a selective and dose-dependent inhibition of kinin B1 receptor-sensitized contractile responses. The inhibitory effect of anandamide on B1 receptor-sensitized responses failed to be modified either by 5-biphenyl-4-ylmethyl-tetrazole-1-carboxylic acid dimethylamide (LY2183240), a selective anandamide uptake inhibitor, or 6-Iodo-2-methyl-1-[2-(4-morpholinyl)ethyl]-1H-indol-3-y l](4-methoxyphenyl) methanone (AM630), selective cannabinoid CB2 receptor antagonist. However, the cannabinoid CB1 receptor antagonist, N-(Piperidin-1-yl)-5-(4-iodophenyl)-1-(2,4-dichlorophen yl)-4-methyl-1H-pyrazole-3-carboxamide (AM251), abolished anandamide effects on kinin B1 receptor sensitization. The present results provide strong pharmacological evidence indicating that endocannabinoid anandamide inhibits kinin B1 receptor up-regulation through cannabinoid CB1 receptor stimulation in human umbilical vein. Keywords: Human umbilical vein; Kinin B1 receptor up-regulation; Anandamide