Phenolic compounds from the stems of Fissistigma polyanthoides and their anti-oxidant activities
Autor: | Kim Le Thien, Hermann Stuppner, Markus Ganzera, Johanna M. Gostner, Lisa Mair, Hieu Nguyen Ngoc, Duc Trong Nghiem |
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Rok vydání: | 2019 |
Předmět: |
Antioxidant
medicine.medical_treatment Cell Flavonoid Phytochemicals Annonaceae Fissistigma 01 natural sciences Antioxidants Cell Line chemistry.chemical_compound Chalcones Phenols Dichlorofluorescein Drug Discovery medicine Humans Viability assay Glycosides IC50 Pharmacology chemistry.chemical_classification biology Molecular Structure Plant Stems 010405 organic chemistry Chemistry Epithelial Cells General Medicine biology.organism_classification 0104 chemical sciences 010404 medicinal & biomolecular chemistry medicine.anatomical_structure Biochemistry Phytochemical Vietnam Reactive Oxygen Species |
Zdroj: | Fitoterapia. 137 |
ISSN: | 1873-6971 |
Popis: | The stems of Fissistigma polyanthoides (A.DC.) Merr. are traditionally used for the treatment of rheumatism and for recuperating women after childbirth. In our continuous phytochemical investigation of this plant, four new (1, 2, 5, and 19) and fifteen known (3, 4, and 6–18) phenolic compounds were isolated. The structures of all compounds were elucidated based on extensive spectroscopic analyses (1D-, 2D-NMR, and MS), and in comparison with reported literature data. The new natural products showed to be two poly-methoxylated chalcones (1 and 2) and two flavonoid glycosides, with 19 containing an uncommon sugar moiety (quinovose). Compounds with sufficient amount were tested for their anti-oxidant activity in a cell-based assay using the human bronchial epithelial cell line BEAS-2B. The compounds' capacity to inhibit the peroxyl radical triggered formation of dichlorofluorescein (DCF) was investigated in a dose-dependent manner. Both, anti-oxidant (3, 4, 6, 8–12, and 14) and pro-oxidative (5 and 16) properties were found for the investigated substances. The half maximal concentrations (IC50) for the inhibition of ROS formation ranged between 18.8 μM and 63.5 μM. Compounds, which acted protectively in the cellular antioxidant activity (CAA) assay and did not negatively affect cell viability, could be interesting targets for further investigations. |
Databáze: | OpenAIRE |
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