The effects of calcium channel blockers are not related to their chemical structure in the collar model of the rabbit
Makaleler > Tam Makale · 2007
Yazarlar: MUKADDER YASA, Zeliha KERRY, Buket REEL, Günay YETİK ANACAK, Elif ERTUNA, A. OZER
JOURNAL OF INTERNATIONAL MEDICAL RESEARCH, SCI Expanded İndekslerine Giren Dergi, Uluslararası, 2007, cilt 35, ss 59-71
DOI: 10.1177/147323000703500106
Özet
Placing a silicone collar around the rabbit carotid artery induces intimal thickening, an early stage in atherosclerosis and restenosis. We investigated whether treatment with oral pranidipine, a new potent, long lasting dihydropyridine calcium channel blocker (CCB), inhibited collar-induced intimal thickening in addition to the changes in vascular reactivity usually observed in this model. Pranidipine treatment did not inhibit collar-induced intimal thickening. Placing the collar around the carotid artery resulted in the characteristic changes in vascular reactivity, such as increased sensitivity to 5-hydroxytryptamine. Treatment with N-omega-nitro-L-arginine (100 mu M) and pranidipine, however, did not affect collarinduced changes in vascular reactivity. From results of this and previous studies, we conclude that pranidipine does not prevent collar-induced intimal thickening or collar-induced changes in vascular reactivity. Not all CCBs prevent collarinduced intimal thickening, suggesting that the effects of these agents are not related to their chemical structure and/or their calcium channel-blocking actions.