Biotransformation of rifampicin by Aspergillus niger and antimicrobial activity of proposed metabolites.
Rafaela Martins SponchiadoJúlia SorrentinoLetícia CordenonsiAlexandre Meneghello FuentefriaAlexandro DallegraveMartin SteppeAndreas Sebastian Loureiro MendezBruna Maria Saorin PutonRogério Luis CansianCássia Virginia GarciaPublished in: Biomedical chromatography : BMC (2024)
Drug biotransformation studies emerges as an alternative to pharmacological investigations of metabolites, development of new drug candidates with reduced investment and most efficient production. The present study aims to evaluate the capacity of biotransformation of rifampicin by the filamentous fungus Aspergillus niger ATCC 9029. After incubation for 312 h, the drug was metabolized to two molecules: an isomer (m/z 455) and the rifampicin quinone (m/z 821). The monitoring of metabolite formation was performed by high-performance liquid chromatography, followed by their identification through ultra-high-performance liquid chromatography coupled to tandem mass spectrometer. In vitro antimicrobial activity of the proposed metabolites was evaluated against Staphylococus aureus microorganism, resulting in the loss of inhibitory activity when compared with the standards, with minimum inhibitory concentration of 7.5 μg/ml. The significant biotransformation power of the ATCC 9029 strain of A. niger was confirmed in this study, making this strain a candidate for pilot studies in fermentation tanks for the enzymatic metabolization of the antimicrobial rifampicin. The unprecedented result allows us to conclude that the prospect of new biotransforming strains in species of anemophilic fungi is a promising choice.
Keyphrases
- tandem mass spectrometry
- mycobacterium tuberculosis
- high performance liquid chromatography
- ultra high performance liquid chromatography
- ms ms
- pulmonary tuberculosis
- simultaneous determination
- mass spectrometry
- solid phase extraction
- escherichia coli
- staphylococcus aureus
- high resolution
- emergency department
- liquid chromatography
- study protocol
- randomized controlled trial
- adverse drug
- hydrogen peroxide
- drug induced
- high resolution mass spectrometry
- current status
- saccharomyces cerevisiae