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In Vitro and In Vivo Evaluation of the Anti-Asthmatic Activities of Fractions from Pheretima

UNCG Author/Contributor (non-UNCG co-authors, if there are any, appear on document)
Wei Jia, Professor and Co-Director of the UNCG Center for Research Excellence in Bioactive Food Components (Creator)
Institution
The University of North Carolina at Greensboro (UNCG )
Web Site: http://library.uncg.edu/

Abstract: Pheretima (family Megascolecidae) has been documented as a potent agent for the treatment of cough and breathing difficulty in traditional Chinese medicine for nearly 2000 years. The water extract of Pheretima was separated into three fractions of the ethanolic precipitate, the alkaline fraction and the acidic fraction. Among the three fractions, the acidic fraction showed the most potent spasmolytic effects on histamine-induced contractions in isolated guinea pig tracheal rings, and the most inhibitory activities on increase of short circuit current induced by carbachol in isolated rat tracheal epitheliums with the IC50 values of 0.15 and 0.08 mg/ml, respectively. Further in vivo studies also displayed that the acidic fraction could protect experimental asthma model induced by the combination of histamine and acetylcholine chloride in guinea pigs to prolong the latent periods of asthma (P < 0.05) and significantly decrease the cough frequency caused by ammonia water in mice (P < 0.001).

Additional Information

Publication
Journal of Ethnopharmacology, 111, 490-495
Language: English
Date: 2007
Keywords
Pheretima, asthma, bronchodilatory, ion transport, antitussive