Purpose: To identify the metabolites of gardenin A (GA) in rat liver microsomes (RLMs) using ultra-high performance liquid chromatography coupled with linear ion-trap Orbitrap mass spectrometry (UHPLCLTQ-Orbitrap). Methods: The sample was prepared by incubating GA (100 μg/mL) with RLMs (0.5 mg/mL) for 8 h. Then 5 μL of the sample was injected into UHPLC-LTQ- orbitrap mass spectrometer. The metabolites of GA were tentatively identified based on accurate mass measurements, fragmentation patterns, chromatographic retention times, and bibliography data. Results: A total of 12 metabolites were detected and identified. Based on their structures, the main reactions in the metabolism of GA are de-methoxylation and de-methylation. Conclusion: This is the first report on in vitro metabolites of GA. These results are considered very helpful for better comprehension of the metabolism of GA and its pharmacological effects.
... EXPERIMENTAL Chemicals and reagents Gardenin A, 5-hydroxy-7, 3', 4', 5'-
tetramethoxyflavone and 5-hydroxy-7, 3', 4'- trimethoxyflavone was purchased from Chengdu Biopurify Phytochemicals Co, Ltd (Sichuan, China). ...
