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  • Title: Screening and isolation of potential neuraminidase inhibitors from leaves of Ligustrum lucidum Ait. based on ultrafiltration, LC/MS, and online extraction-separation methods.
    Author: Zhang Y, He Y, Liu C, Liu C, Li S.
    Journal: J Chromatogr B Analyt Technol Biomed Life Sci; 2018 Apr 15; 1083():102-109. PubMed ID: 29525364.
    Abstract:
    Ultrafiltration liquid chromatography-mass spectrometry (ultrafiltration LC/MS) is introduced as an efficient method that can be applied to rapidly screen and identify ligands from the leaves of Ligustrum lucidum Ait. Using this method, we identified 13 compounds, including organic acids, flavonoids, and glycosides, as potent neuraminidase inhibitors. A continuous online method, employing pressurized liquid extraction followed by parallel centrifugal partition chromatography and preparative liquid chromatography PLE-(parallel-CPC/PLC), was developed for the efficient, scaled-up production of 12 compounds with high purities. The bioactivities of the separated compounds were assessed by an in vitro enzyme inhibition assay. The use of ultrafiltration LC/MS combined with PLE-(parallel-CPC/PLC), and an in vitro enzyme inhibition assay facilitated the efficient screening and isolation of neuraminidase inhibitors from complex samples, and could serve as an important platform for the large-scale production of functional ingredients.
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