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Type: Artigo de periódico
Title: Antiulcer Activity And Subacute Toxicity Of Trans-dehydrocrotonin From Croton Cajucara.
Author: Rodríguez, Jaime A
Hiruma-Lima, Clélia A
Souza Brito, Alba R M
Abstract: The antiulcerogenic activity of trans-dehydrocrotonin (DHC), a nor-clerodane diterpene isolated from Croton cajucara Benth. (Euphorbiaceae), and its subacute (35 days) toxicity were studied in mice and rats, respectively. For the antiulcerogenic tests, models of gastric ulcers induced in mice by ethanol/HCl or stress were used. In both models, an oral dose of DHC (100 mg/kg) significantly reduced (P < 0.01) the formation of gastric lesions. DHC was also tested for its ability to scavenge free radicals, but no such action was observed in rat liver mitochondria. To assess the subacute toxicity, rats were treated orally with DHC (25, 50 and 100 mg/kg) for 5 weeks. A significant increase in liver weight was observed in male and female rats at highest doses, whereas a significant reduction in plasma alkaline phosphatase and cholesterol levels and an increase in gamma glutamyl transpeptidase were observed only at the highest dose (100 mg/kg) in female rats. DHC caused histopathological alterations in the liver that included a turbid tumefaction, microvacuolar degeneration and nuclear alterations. Despite the beneficial antiulcerogenic activity of DHC, our results suggest that the long-term use of this compound may induce liver damage.
Subject: Alkaline Phosphatase
Anti-ulcer Agents
Diterpenes, Clerodane
Dose-response Relationship, Drug
Drug-induced Liver Injury
Free Radical Scavengers
Hydrochloric Acid
Liver Diseases
Mitochondria, Liver
Rats, Wistar
Stomach Ulcer
Thiobarbituric Acid Reactive Substances
Weight Gain
Rights: fechado
Identifier DOI: 
Date Issue: 2004
Appears in Collections:Unicamp - Artigos e Outros Documentos

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