Lacidipine has antiatherosclerotic effects independent of its actions on lipid metabolism and blood pressure

Abstract The antiatherosclerotic effect of lacidipine has been attributed to its actions on cholesterol levels, lipid metabolism or oxidant stress in advanced disease. The purpose of the present experiments was to examine whether lacidipine is protective of intimal thickening and vascular dysfunctio...

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Published in:Vascular pharmacology 2010-11, Vol.53 (5), p.193-199
Main Authors: Yetik Anacak, Günay, Üstünes, Levent, Dilsiz, Ozlem Yilmaz, Ergul, Adviye
Format: Article
Language:English
Subjects:
5-HT sensitivity
Animals
Atherosclerosis - pathology
Atherosclerosis - physiopathology
Atherosclerosis - prevention & control
Blood Pressure - drug effects
Calcium Channel Blockers - pharmacology
Calcium Channel Blockers - therapeutic use
Cardiovascular
Carotid Arteries - drug effects
Carotid Arteries - pathology
Carotid Arteries - physiopathology
Collar-induced atherosclerosis
Dihydropyridines - pharmacology
Endothelium, Vascular - drug effects
Endothelium, Vascular - physiopathology
Female
Intimal thickening
Isometric Contraction
Lacidipine
Lipid Metabolism - drug effects
Male
Matrix Metalloproteinase 9 - metabolism
MMP-9
Nitric oxide
Nitric Oxide - physiology
Oxidative Stress
Rabbit carotid artery
Rabbits
Tunica Intima - drug effects
Tunica Intima - pathology
Vascular reactivity
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Summary:Abstract The antiatherosclerotic effect of lacidipine has been attributed to its actions on cholesterol levels, lipid metabolism or oxidant stress in advanced disease. The purpose of the present experiments was to examine whether lacidipine is protective of intimal thickening and vascular dysfunction in early atherosclerosis in the absence of the hypertension and hypercholesterolemia. A second goal was to determine whether and to what extent MMP-9 and oxidant stress are involved in possible beneficial effects of lacidipine. Lacidipine treatment (5 mg/kg/day, p.o. for 3 weeks) significantly prevented the collar-induced intimal thickening. MMP-9 expressions were increased by collar but not effected by lacidipine treatment. Nitrotyrosine staining, a marker for oxidant stress was not changed neither by collar nor lacidipine treatment in early atherosclerosis. The enhanced sensitivity to serotonine and diminished sensitivity to acetylcholine in collared arteries were restored to normal levels with treatment. These results demonstrate that the lacidipine treatment prevents the collar-induced intimal thickening and accompanying vascular dysfunction in early atherosclerosis without cholesterol loading. These beneficial effects of lacidipine were not associated with changes in either MMP-9 expression or oxidant stress. However, enhanced endothelium-dependent relaxations by lacidipine, suggest that vascular protective effects of nitric oxide may be at least partly, responsible from antiatherosclerotic effects of lacidipine.
ISSN:1537-1891
1879-3649
DOI:10.1016/j.vph.2010.08.003