Enzymatic Transformation of Secondary Metabolites in Abeliophyllum distichum Extract by Viscozyme® L Treatment
Abstract
Abeliophyllum distichum is rich in polyphenols and flavonoids with various bioactivities; however, studies on enzymatic modifications to enhance its functional properties remain limited. This study investigated the effect of Viscozyme® L treatment on the secondary metabolite profile of A. distichum leaves. Phytochemical profiling using liquid chromatography–electrospray ionization tandem mass spectrometry revealed a decrease in the total number of detectable compounds, from 26 in the untreated extract to 16 in the enzyme-treated extract. Following Viscozyme® L treatment, a notable shift in metabolite composition was observed, with significant enrichment of flavonoid glycosides, pyranone derivatives, and amino acid-related metabolites. Quantitative high-performance liquid chromatography analysis showed significant reductions in glycosylated compounds such as rutin (1), acteoside (2), and isoacteoside (3), while the aglycone quercetin (4) content increased more than four-fold compared to the control. These results indicate that Viscozyme® L facilitates the deglycosylation of flavonoid glycosides into their aglycone forms. This enzymatic transformation suggests a potential strategy to enhance the bioavailability and functional value of A. distichum leaf extracts for nutraceutical and pharmaceutical applications.
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