Abstract
Ethnopharmacological relevance The flowers of Chiranthodendron pentadactylon Larreat. (Sterculiaceae) has been traditionally used as folk medicine in Mexico for the treatment of gastrointestinal disorders such as diarrhea and dysentery. Aim of the study This study aimed to assess the antisecretory activity which supports the therapeutic use of Chiranthodendron pentadactylon and its flavonoids to treat diarrhea. Materials and methods The methanol extract of Chiranthodendron pentadactylon, subsequent fractions, and flavonoids were evaluated on cholera toxin-induced intestinal secretion in rat jejunal loops model. Results Three antisecretory flavonoids were isolated by bioassay-guided purification, namely, isoquercitrin 3, (+)-catechin 4 and (−)-epicatechin 5. Among them, epicatechin exhibited the most potent antisecretory activity with ID 50 of 8.3 μM/kg. Its potency was close that of to loperamide (ID 50 6.1 μM/kg), drug used as control. Isoquercitrin (ID 50 19.2 μM/kg) and catechin (ID 50 51.7 μM/kg) showed moderate and weak activity, respectively. Conclusion The results of the present study lend some support to the anecdotal report for the traditional use of the flowers of Chiranthodendron pentadactylon in the control of dysentery.
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