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- W2000944992 abstract "Calcium channel blockers (CCBs) are among the most frequently prescribed cardiovascular drugs. It has been shown that these drugs have antiatherosclerotic effects in both experimental and clinical settings. However, calcium channel blockers have markedly different chemical structures and different effects on the cardiovascular system. We investigated the effect of CD-832, a Ca(+2) channel antagonist, on collar-induced intimal thickening, as well as accompanied reactivity changes in rabbit carotid artery.Rabbits received 5 mg/kg/day CD-832 or vehicle (polyethylene glycol, 0.5 ml/kg/day) intramuscularly for a week before and 2 weeks after the collar application. Histological and isometric force measurements were performed in segments from sham and collared carotid arteries. A three-week treatment with CD-832 did not inhibit the intimal thickening caused by perivascular application of a silicone collar. Potassium chloride (KCl), phenylephrine, 5-hydroxytryptamine (5-HT, serotonin) and histamine induced concentration-dependent contractions in both sham-operated (sham) and collared arteries. Collar-induced attenuations in maximum KCl, histamine, phenylephrine and 5-HT contractions were not affected by CD-832. Collaring caused an increase in pD2 values of 5-HT and a decrease in those of phenylephrine, histamine and acetylcholine. CD-832 did not affect the altered sensitivity to these agonists.These results demonstrate that, in rabbit carotid artery, CD-832 did not inhibit the collar-induced intimal thickening and did not affect the accompanying changes in vascular reactivity." @default.
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- W2000944992 date "2005-11-01" @default.
- W2000944992 modified "2023-10-17" @default.
- W2000944992 title "Diverse effects of calcium channel blockers in the collar model" @default.
- W2000944992 doi "https://doi.org/10.2143/ac.60.5.2004970" @default.
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