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Dichloroisoproterenol및 인삼(人蔘)의 이삼약물(二三藥物)의 작용(作用)에 미치는 영향(影響)
천연숙,최백희,김치억,임규복,최경훈 大韓藥理學會 1966 대한약리학잡지 Vol.2 No.1
Dichloroisoproterenol(DCI) i; one of the well known <TEX>${\beta}$</TEX>-adrenergic receptor blocking agents. According to Moran and Perkins, DCI has sympathomimetic like action in relatively low concentrations. Fleming and Hawkins confirmed that DCI acts upon the receptors concerned with positive chronotropic and inotropic actions in the heart. Vogins reported that DCI, in concentration of <TEX>$5{\times}10^{-8}$</TEX> to <TEX>$5{\times}10^{-6}g/ml$</TEX>, had properties of sympathomimetic amine causing positive inotropic and chronotropic actions in normal rat atria. And James and Nadeau found that DCI had not only adrenergic blocking effect in moderate and higher concentrations, but it also blocked the effect on the sinus node by vagal stimulation and of directly administered acetylcholine in higher concentrations. As stated above by many authors, DCI has complicated actions according to its concentrations. Our aim at the present experiments was to study the effects of DCI to the action of ouabain and acetylcholine upon the excised rabbit atria, as well as to the action of barium chloride and acetylcholine upon the excised rabbit intestine. In addition, Pan ax Ginseng is widely used as tonics in oriental nations, its pharmacological action, however, has not been clearly established. So we atempted to investigate the effects of the water extract of Panax Ginseng to the action of ouabain and DCI upon both atria and intestine. The results obtained were as follows. 1) DCI has a negative inotropic effect on the excised rabbit atria at concentration of <TEX>$10^{-5}$</TEX> and a positive inotropic effect at concentration of <TEX>$10^{-6}$</TEX>. 2) DCI (at concentration of <TEX>$10^{-6}$</TEX>) potentiates the positive inotropic effect of ouabain upon the excised rabbit atria. 3) DCI antagonizes the action of acetylcholine upon the excised rabbit atria. 4) The water extract of Panax Ginseng, at concentration of <TEX>$10^{-3}$</TEX>, decreases the contractile force of ra
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