Role of bicarbonate ion in the postjunctional action of cocaine in the smooth muscle of the rat vas deferens.
スポンサーリンク
概要
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In the HEPES-buffered physiological solution containing 20 mM bicarbonate ion, cocaine not only increased the sensitivity to norepinephrine but enhanced the maximal contractions to norepinephrine and methacholine in the rat vas deferens. Cocaine also potentiated the high potassium-induced contractions. In the solution without bicarbonate ion, such effects of cocaine were lost except for the sensitivity increase to norepinephrine. These results suggest that bicarbonate ion is crucial for the postjunctional stimulatory action of cocaine in the rat vas deferens.
著者
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Gomi Yasuo
Department Of Pharmacology Faculty Of Pharmaceutical Science Kanazawa University
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Suzuki Nagao
Department Of Chemical Pharmacology Faculty Of Pharmaceutical Sciences University Of Tokyo
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