Bufalinのラットにおける体内動態

概要

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In an attempt to evaluate the metabolic fate of "Kyushin", which is a traditional medicine containing Toad venom, a ^3H-labeled compound of bufalin, which is one of the main active components, has been synthesized. The metabolic fate of the ^3H-bufalin was studied after its single and repeated oral administration in rats. After a single administration of the ^3H-bufalin (20 μg/kg), the radioactivity in the blood reached a maximum level at 15 min. The radioactivity in the blood declined in a triphasic manner with half-life times of 18 min, 2.6 and 86 h. Within 24 h after the single administration, the excretion of the radioactivity into the urine and feces amounted to 1.3% and 81% of the administered dose, respectively. Tissue radioactivity was higher in the stomach, small intestine, liver, lung, kidney and pancreas, while the radioactivity in other tissues was lower than that in blood. Radioactivity disappeared rapidly from any tissues. In case of repeated administration for 14 d, the disposition of radioactivity was almost same as the result after a single dosing, and radioactivity scarcely remained in any tissues after the last administration.
社団法人日本薬学会の論文
1991-11-25