lindera megaphylla/potassium

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Dicentrine, an alpha-adrenoceptor antagonist with sodium and potassium channel blocking activities.

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To elucidate the electrophysiological effect of dicentrine, an alkaloid isolated from Lindera megaphylla, we examined action potential and membrane currents in single cardiac cells. The tight-seal whole cell clamp technique was used. In the current clamp condition, 3 microM dicentrine prolonged rat

Dicentrine, a natural vascular alpha 1-adrenoceptor antagonist, isolated from Lindera megaphylla.

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1. The pharmacological activity of dicentrine, isolated from Lindera megaphylla, was determined in rat isolated thoracic aorta, guinea-pig isolated trachea and human platelet-rich plasma. 2. Dicentrine was found to be a potent alpha 1-adrenoceptor blocking agent in rat thoracic aorta as revealed by

Bioactive principles from the roots of Lindera megaphylla.

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d-Dicentrine was isolated from the root of Lindera megaphylla. It inhibited the aggregation of washed rabbit platelets induced by ADP, collagen, arachidonic acid, and PAF. It also inhibited the high potassium- and norepinephrine-induced contraction of rat thoracic aorta. In rat ventricular cells

The electrophysiological effects of dicentrine on the conduction system of rabbit heart.

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1. The electrophysiological effects of dicentrine, an aporphine alkaloid isolated from the root of Lindera megaphylla, were examined in the Langendorff perfused rabbit heart and rabbit isolated cardiac cells. 2. Standard electrophysiological characters were measured in the Langendorff perfused

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