title: Lipoxygenase inhibition decreases neointimal formation following vascular injury.
abstract: Our aim was to assess the potential role of lipoxygenase (LO) products in neointimal formation following vascular injury. We investigated the effect of LO pathway inhibition, by phenidone, on the concentration of 12- and 5-hydroxyeicosatetraenoic acid (12- and 5-HETE) in rat whole blood and in aortic tissue. We also examined the effect of phenidone on myoneointimal formation in balloon-injured rat carotid arteries. Phenidone significantly decreases the concentration of HETEs in aortic tissue, and decreases neointimal size even though there is no difference in the BrdU index. These data indicate that the LO product participates in developing neointima following balloon-induced vascular injury, and that the LO blocker phenidone decreases neointimal size possibly by suppressing migration of smooth muscle cells.
authors.affiliation: Department of Cardiology, Surugadai Nihon University Hospital, 1-8-13, Kandasurugadai, Chiyoda-ku, Tokyo, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Fujita
authors.forename: F
authors.initials: F
authors.lastname: Saito
authors.forename: T
authors.initials: T
authors.lastname: Sawada
authors.forename: T
authors.initials: T
authors.lastname: Kushiro
authors.forename: H
authors.initials: H
authors.lastname: Yagi
authors.forename: K
authors.initials: K
authors.lastname: Kanmatsuse
mesh_terms: D019377:12-Hydroxy-5,8,10,14-eicosatetraenoic Acid / Q000378:metabolism; D000800:Angioplasty, Balloon / Q000009:adverse effects; D000818:Animals; D001013:Aorta, Thoracic / Q000293:injuries / Q000378:metabolism / Q000473:pathology; D020212:Carotid Artery Injuries / Q000209:etiology / Q000473:pathology*; D002455:Cell Division; D006893:Hydroxyeicosatetraenoic Acids / Q000378:metabolism; D008084:Lipoxygenase / Q000502:physiology*; D016859:Lipoxygenase Inhibitors / Q000494:pharmacology*; D008297:Male; D011720:Pyrazoles / Q000494:pharmacology; D051381:Rats; D017207:Rats, Sprague-Dawley; D017539:Tunica Intima / Q000473:pathology*
chemical_list: D006893:Hydroxyeicosatetraenoic Acids; D016859:Lipoxygenase Inhibitors; D011720:Pyrazoles; C022022:5-hydroxy-6,8,11,14-eicosatetraenoic acid; D019377:12-Hydroxy-5,8,10,14-eicosatetraenoic Acid; D008084:Lipoxygenase; C015429:phenidone