Abstract
Twenty-five fungal cultures were screened for their ability to transform the anthelmintic drug albendazole. A filamentous fungi Cunninghamella blakesleeana transformed albendazole to three metabolites in significant quantities. The transformation of albendazole was identified by HPLC. Based on the LC-MS-MS data, two metabolites were predicted to be albendazole sulfoxide and albendazole sulfone, the major mammalian metabolites reported previously. A new N-methylated metabolite of albendazole sulfoxide was also produced, where the methylation took place on the N-atom of the imidazole ring system. A temperature of 30°C, pH of 8 and high substrate concentrations produced highest transformation of albendazole. Among the various concentrations studied, 2% w/v of glucose produced highest transformation. The results reveal that the microbial model can be used to produce large quantities of mammalian metabolites.
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