title: Linalool elicits vasorelaxation of mouse aortae through activation of guanylyl cyclase and K(+) channels.
abstract: OBJECTIVE
  The aim of this study was to investigate the cardiovascular relaxing properties of monoterpene alcohol (-)-linalool (LIN), a principal component of several aromatic plants.
  
  
  METHODS
  We assessed the effects of LIN on vascular contractility in mouse aortae and evaluated its underlying mechanisms of action.
  
  
  RESULTS
  We found that LIN dose-dependently relaxed the vascular tonus of mouse thoracic aortae induced by prostaglandin F2 alpha (PGF2α , 3 μm). This effect, however, was reduced by pretreatment with the nitric oxide synthase inhibitor L-NAME (30 μm). Treatment with the inhibitor of soluble guanylyl cyclase ODQ (2 μm) or the K(+) channel blocker TEA (10 mM) partially blocked LIN-induced vasorelaxation. Moreover, addition of TEA after incubation of the rings with L-NAME and ODQ partially blocked LIN-induced vasorelaxation. Furthermore, LIN was able to partially antagonize CaCl2 -induced contractions in high potassium (80 mM) Krebs' solution, whereas LIN did not affect Ca(2+) release from endoplasmic reticulum Ca(2+) stores.
  
  
  CONCLUSIONS
  Our findings indicate that LIN may induce endothelium-dependent vasorelaxation in mouse thoracic aortae by activating soluble guanylyl cyclase and K(+) channels.
authors.affiliation: Department of Basic Nursing Science, School of Nursing, Korea University, Seoul, Korea.
authors.forename: Purum
authors.initials: P
authors.lastname: Kang
authors.forename: Geun Hee
authors.initials: GH
authors.lastname: Seol
mesh_terms: D000080462:Acyclic Monoterpenes; D000818:Animals; D001011:Aorta / Q000187:drug effects* / Q000378:metabolism; D002118:Calcium / Q000378:metabolism; D002122:Calcium Chloride / Q000037:antagonists & inhibitors / Q000494:pharmacology; D015237:Dinoprost / Q000037:antagonists & inhibitors / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D004721:Endoplasmic Reticulum / Q000378:metabolism; D004789:Enzyme Activation / Q000187:drug effects; D006162:Guanylate Cyclase / Q000378:metabolism*; D008297:Male; D051379:Mice; D039821:Monoterpenes / Q000037:antagonists & inhibitors / Q000494:pharmacology*; D019331:NG-Nitroarginine Methyl Ester / Q000494:pharmacology; D010069:Oxadiazoles / Q000494:pharmacology; D015221:Potassium Channels / Q000378:metabolism*; D011810:Quinoxalines / Q000494:pharmacology; D019789:Tetraethylammonium / Q000494:pharmacology; D014664:Vasodilation / Q000187:drug effects*; D014665:Vasodilator Agents / Q000494:pharmacology
chemical_list: C095284:1H-(1,2,4)oxadiazolo(4,3-a)quinoxalin-1-one; D000080462:Acyclic Monoterpenes; D039821:Monoterpenes; D010069:Oxadiazoles; D015221:Potassium Channels; D011810:Quinoxalines; D014665:Vasodilator Agents; D019789:Tetraethylammonium; D015237:Dinoprost; C018584:linalool; D006162:Guanylate Cyclase; D002122:Calcium Chloride; D002118:Calcium; D019331:NG-Nitroarginine Methyl Ester
keywords: (-)-linalool; K+ channel; soluble guanylyl cyclase; vasorelaxation