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20-Hydroxyeicosatetraenoic acid inhibition attenuates balloon injury-induced neointima formation and vascular remodeling in rat carotid arteries.
- Source :
-
The Journal of pharmacology and experimental therapeutics [J Pharmacol Exp Ther] 2013 Jul; Vol. 346 (1), pp. 67-74. Date of Electronic Publication: 2013 May 08. - Publication Year :
- 2013
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Abstract
- 20-Hydroxyeicosatetraenoic acid (20-HETE) contributes to the migration and proliferation of vascular smooth muscle cells (VSMC) in vitro, but there are few studies that address its effects on vascular remodeling in vivo. The present study determined whether inhibition of 20-HETE production attenuates intimal hyperplasia (IH) and vascular remodeling after balloon injury (BI). Sprague Dawley rats underwent BI of the common carotid artery and were treated with vehicle, 1-aminobenzotriazole (ABT, 50 mg/kg i.p. once daily), or HET0016 (N-hydroxy-N'-(4-butyl-2-methylphenyl)-formamidine) (2 mg/kg s.c. twice daily) for 14 days. Fourteen days after BI and treatment, the animals underwent carotid angiography, and the arteries were harvested for morphometric, enzymatic and immunohistochemical analysis. There was a 96% reduction of angiographic stenosis in the rats treated with 1-ABT. There was a 61 and 66% reduction of the intima/media area ratios in the 1-ABT and HET0016 treated rats compared with the vehicle-treated group. 20-HETE levels were elevated in BI carotid arteries, and the levels were markedly suppressed in the groups treated with 1-ABT and HET0016 (P < 0.001). Immunostaining revealed that the expression of CYP4A enzyme was markedly increased in the neointima of BI arteries, and it colocalized with the expression of smooth muscle-specific actin, indicating increased proliferation of VSMC. An increase in the expression of CYP4A and the production of 20-HETE contributes to neointimal growth in BI rat carotid arteries. Systemic administration 1-ABT or HET0016 prevents the increase in 20-HETE levels and attenuates VSMC migration and proliferation, resulting in a marked reduction in IH and vascular remodeling after endothelial injury.
- Subjects :
- Amidines therapeutic use
Angioplasty, Balloon, Coronary adverse effects
Animals
Carotid Artery Injuries drug therapy
Carotid Artery Injuries etiology
Carotid Artery Injuries pathology
Carotid Artery Injuries physiopathology
Carotid Artery, Common drug effects
Carotid Artery, Common metabolism
Carotid Artery, Common pathology
Carotid Stenosis etiology
Carotid Stenosis metabolism
Carotid Stenosis pathology
Cell Movement drug effects
Cell Proliferation drug effects
Cytochrome P-450 CYP4A metabolism
Cytochrome P-450 Enzyme Inhibitors
Cytochrome P-450 Enzyme System metabolism
Cytochrome P450 Family 4
Hydroxyeicosatetraenoic Acids metabolism
Hyperplasia
Male
Muscle, Smooth, Vascular drug effects
Muscle, Smooth, Vascular metabolism
Muscle, Smooth, Vascular pathology
Neointima etiology
Rats
Rats, Sprague-Dawley
Triazoles therapeutic use
Tunica Intima drug effects
Tunica Intima metabolism
Tunica Intima pathology
Carotid Stenosis prevention & control
Cytochrome P-450 CYP4A antagonists & inhibitors
Disease Models, Animal
Enzyme Inhibitors therapeutic use
Hydroxyeicosatetraenoic Acids antagonists & inhibitors
Neointima prevention & control
Tunica Intima injuries
Subjects
Details
- Language :
- English
- ISSN :
- 1521-0103
- Volume :
- 346
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- The Journal of pharmacology and experimental therapeutics
- Publication Type :
- Academic Journal
- Accession number :
- 23658377
- Full Text :
- https://doi.org/10.1124/jpet.113.203844