Vanilloid receptors on sensory nerves mediate the vasodilator action of anandamide

Forskningsoutput: TidskriftsbidragLetter

Abstract

The endogenous cannabinoid receptor agonist anandamide is a powerful vasodilator of isolated vascular preparations, but its mechanism of action is unclear. Here we show that the vasodilator response to anandamide in isolated arteries is capsaicin-sensitive and accompanied by release of calcitonin- gene-related peptide (CGRP). The selective CGRP-receptor antagonist 8-37 CGRP (ref. 5), but not the cannabinoid CB1 receptor blocker SR141716A (ref. 7), inhibited the vasodilator effect of anandamide. Other endogenous. (2- arachidonylglycerol, palmitylethanolamide) and synthetic (HU 210, WIN 55,212- 2, CP 55,940) CB1 and CB2 receptor agonists could not mimic the action of anandamide. The selective 'vanilloid receptor' antagonist capsazepine inhibited anandamide-induced vasodilation and release of CGRP. In patch-clamp experiments on cells expressing the cloned vanilloid receptor (VR1), anandamide induced a capsazepine-sensitive current in whole cells and isolated membrane patches. Our results indicate that anandamide induces vasodilation by activating vanilloid receptors on perivascular sensory nerves and causing release of CGRP. The vanilloid receptor may thus be another molecular target for endogenous anandamide, besides cannabinoid receptors, in the nervous and cardiovascular systems.

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • Lund University
  • Istituto per le Tecnologie Applicate ai Beni Culturali (CNR-ITABC)
  • University of California, San Francisco
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Farmakologi och toxikologi
Originalspråkengelska
Sidor (från-till)452-457
Antal sidor6
TidskriftNature
Volym400
Utgivningsnummer6743
StatusPublished - 1999 jul 29
PublikationskategoriForskning
Peer review utfördJa