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Stereoselective and endothelium-independent action of nicardipine on the isolted porcine coronary arteryJapelj, Irena ...The qualitative and quantitative effects of the (+)-S and (-)-R enantiomers and of the racemic mixture of the Ca2+ channel antagonist, nicardipine, were compared on the isolated porcine coronary ... artery with intact and removed endothelium. All three forms of nicardipine inhibited the contractions inducedby KC1 (5-90 mM) in both vessel preparations. The potency (IC50) of the(+)-S and (-)-R enantiomers and of the racemic mixture was 6.6, 31.8 and 10.9 nM in the vessel with endothelium and 6.4, 41.9 and 9.8 nM inthe vessel without endothelium. The parameters of the concentration-response curves for each form of nicardipine at a submaximal KCI (60 mM) concentration and the potency ratios between the two enantiomers (( + )-S/( - )-R) were not statistically significantly different (P>0.05) in the two vessel preparations.In conclusion, qualitatively, all three forms of nicardipine showed only Ca2+ channel antagonistic effects in both vessel prepartions. Quantitatively, the inhibition of contraction was stereoselective, the ( + )-Senantiomer being the most potent, and was endothelium-independent.Source: European Journal of Pharmacology. - ISSN 0014-2999 (Letn. 369, 1999, str. 43-47)Type of material - article, component partPublish date - 1999Language - englishCOBISS.SI-ID - 9866969
Author
Japelj, Irena |
Budihna, Metka, 1937- |
Stanovnik, Lovro |
Krisch, Igor
Topics
Stereoisomerism |
Nicardipine |
Therapeutic use |
Calcium channel agonists |
Calcium channels |
Antagonists and inhibitors |
Coronary vessels |
Drug effects |
Pathology |
Endothelium, vascular |
Drug effects |
Physiology |
Disease models, animal
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Database name | Field | Year |
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Japelj, Irena | 19425 |
Budihna, Metka, 1937- | 02740 |
Stanovnik, Lovro | 01547 |
Krisch, Igor | 07730 |
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