Abstract
Fusarenon-X (F-X) is one of the trichothecene mycotoxins. In the present work, pharmacological properties of F-X were examined. (1) F-X induced hypothermia but did not produce appreciable behavioral changes of mice. (2) In anesthetized rats, F-X caused a rise in the blood pressure and a decrease in the respiratory rate but induced no significant change in the heart rate. (3) In isolated tissues such as fundus muscle, vas deferens, tracheal muscle, ileum, and atrium, F-X had no detectable effects on spontaneous activity and the responsiveness to agonists. (4) Subplantar administration of F-X into rat hindpaw induced edema. F-X had little influence on the histamine release from mast cells and the membrane stability of erythrocytes. (5) F-X decreased the spontaneous peristalsis of intestine but increased the intestinal propulsion of charcoal meal. (6) F-X induced vomiting in dogs which was suppressed by preliminary administration of chlorpromazine and metoclopramide. F-X may induce vomiting by stimulating the chemoreceptor trigger zone in dogs.
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