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Bioassay-guided isolation of an anti-ulcer chromene from Eupatorium aschenbornianum: Role of nitric oxide, prostaglandins and sulfydryls

María Elena ME Sánchez-Mendoza, Benito B Reyes-Trejo, Paula P Sánchez-Gómez, Juan J Rodríguez-Silverio, Carlos C Castillo-Henkel, Humberto H Cervantes-Cuevas, and Jesús J Arrieta

Fitoterapia 81(1):6 (2010) PMID 19651191

Eupatorium aschenbornianum is considered useful in the treatment of gastric ulcer. In the current study the validity of this practice was tested by using the experimental model of an ethanol induced gastric ulcer in rats. The results show that E. aschenbornianum had gastroprotective activity, that the hexane extract had the highest protective activity (85.65+/-4.76%), and that encecanescin isolated from this extract was the main active gastroprotective agent. The effect elicited by encecanescin was attenuated by N^G-nitro-l-arginine methyl ester, N-ethylmaleimide and indomethacin, which suggests that NO, prostaglandins and sulfydryl groups are involved in the mechanisms of gastroprotective action.

DOI: 10.1016/j.fitote.2009.07.009
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