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  • Anandamide and arachidonic acid use epoxyeicosatrienoic acids to activate TRPV4 channels
  • Watanabe H; Vriens J; Prenen J; Droogmans G; Voets T; Nilius B
  • Nature 2003[Jul]; 424 (6947): 434-8
  • TRPV4 is a widely expressed cation channel of the 'transient receptor potential' (TRP) family that is related to the vanilloid receptor VR1 (TRPV1). It functions as a Ca2+ entry channel and displays remarkable gating promiscuity by responding to both physical stimuli (cell swelling, innoxious heat) and the synthetic ligand 4alphaPDD. An endogenous ligand for this channel has not yet been identified. Here we show that the endocannabinoid anandamide and its metabolite arachidonic acid activate TRPV4 in an indirect way involving the cytochrome P450 epoxygenase-dependent formation of epoxyeicosatrienoic acids. Application of 5',6'-epoxyeicosatrienoic acid at submicromolar concentrations activates TRPV4 in a membrane-delimited manner and causes Ca2+ influx through TRPV4-like channels in vascular endothelial cells. Activation of TRPV4 in vascular endothelial cells might therefore contribute to the relaxant effects of endocannabinoids and their P450 epoxygenase-dependent metabolites on vascular tone.
  • |*Cation Transport Proteins[MESH]
  • |8,11,14-Eicosatrienoic Acid/analogs & derivatives/*metabolism/pharmacology[MESH]
  • |Animals[MESH]
  • |Aorta[MESH]
  • |Arachidonic Acid/*pharmacology[MESH]
  • |Arachidonic Acids/*pharmacology[MESH]
  • |Calcium/metabolism[MESH]
  • |Cannabinoid Receptor Modulators[MESH]
  • |Cell Line[MESH]
  • |Electrophysiology[MESH]
  • |Endocannabinoids[MESH]
  • |Endothelium, Vascular/drug effects/metabolism[MESH]
  • |Humans[MESH]
  • |Ion Channel Gating/drug effects[MESH]
  • |Ion Channels/*metabolism[MESH]
  • |Mice[MESH]
  • |Polyunsaturated Alkamides[MESH]
  • |TRPV Cation Channels[MESH]





  • *{{pmid12879072}}
    *<b>[http://www.kidney.de/mlpefetch.php?search=12879072 Anandamide and arachidonic acid use epoxyeicosatrienoic acids to activate TRPV4 channels ]</b> Nature 2003; 424(6947) ; 434-8 Watanabe H; Vriens J; Prenen J; Droogmans G; Voets T; Nilius B

        *12879072*

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    Nature

    434 6947.424 2003