Miniaturized Extraction Techniques in Drug Biotransformation Studies by using Endophytic Fungi Cunninghamella elegans

Amanda Thomas Barden; Júlia Medeiros Sorrentino; Nathalie Ribeiro Wingert; Elfrides Eva Scherman Schapoval

doi:10.22456/2527-2616.140446

Authors

Amanda Thomas Barden Pharmaceutical Quality Control Laboratory, School of Pharmacy, Graduate Program in Pharmaceutical Sciences - Universidade Federal do Rio Grande do Sul
Júlia Medeiros Sorrentino Pharmaceutical Quality Control Laboratory, School of Pharmacy, Graduate Program in Pharmaceutical Sciences - Universidade Federal do Rio Grande do Sul
Nathalie Ribeiro Wingert Pharmaceutical Quality Control Laboratory, School of Pharmacy, Graduate Program in Pharmaceutical Sciences - Universidade Federal do Rio Grande do Sul
Elfrides Eva Scherman Schapoval Pharmaceutical Quality Control Laboratory, School of Pharmacy, Graduate Program in Pharmaceutical Sciences - Universidade Federal do Rio Grande do Sul

DOI:

https://doi.org/10.22456/2527-2616.140446

Keywords:

biotransformation, endophytic fungi, miniaturized techniques, green chemistry, metabolites

Abstract

In addition to predicting biotransformation in humans, drug biotransformation studies are important because they can generate active metabolites or new intermediates with possible use by the pharmaceutical industry. Endophytic fungi of the genus Cunninghamella can metabolize many drugs in a similar way to humans. The analysis of these metabolites requires prior treatment of the samples in order to obtain compatibility with the detection system and the separation technique. This work aimed to study the biotransformation of the drugs duloxetine (DLX), citalopram (CIT) and amlodipine (ANL) by endophytic fungi Cunninghamella elegans ATCC 9245, the development of micro extraction methods in the context of green chemistry, and the validation of the analytical methods for drugs and their respective metabolites. Bioanalytical method by HPLC was successfully developed and validated for both drugs (DLX, CIT and ANL). The metabolites of DLX and CIT obtained by biotransformation studies were not detected in the conditions of this study, but it was possible to visualize one additional peak in the chromatogram analysis of ANL indicate that this drug has been metabolized by Cunninghamella elegans. Furthermore, it has been developed two liquid-liquid micro extraction methods achieving success by removing drugs in both techniques, with recovery greater than 90%. The use of Quality by Design (QbD) through the experimental design provided the best conditions for carrying out biotransformation and micro extraction studies of drugs from the fungal matrix.

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