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Anti-Inflammatory Effect of Flavonoids from Brugmansia arborea L. Flowers

  • Kim, Hyoung-Geun (Graduate School of Biotechnology and Department of Oriental Medicinal Biotechnology, Kyung Hee University) ;
  • Jang, Davin (Department of Food Science and Biotechnology, Kyung Hee University) ;
  • Jung, Young Sung (Department of Food Science and Biotechnology, Kyung Hee University) ;
  • Oh, Hyun-Ji (Graduate School of Biotechnology and Department of Oriental Medicinal Biotechnology, Kyung Hee University) ;
  • Oh, Seon Min (Graduate School of Biotechnology and Department of Oriental Medicinal Biotechnology, Kyung Hee University) ;
  • Lee, Yeong-Geun (Graduate School of Biotechnology and Department of Oriental Medicinal Biotechnology, Kyung Hee University) ;
  • Kang, Se Chan (Graduate School of Biotechnology and Department of Oriental Medicinal Biotechnology, Kyung Hee University) ;
  • Kim, Dae-Ok (Department of Food Science and Biotechnology, Kyung Hee University) ;
  • Lee, Dae Young (Department of Herbal Crop Research, National Institute of Horticultural and Herbal Science, RDA) ;
  • Baek, Nam-In (Graduate School of Biotechnology and Department of Oriental Medicinal Biotechnology, Kyung Hee University)
  • Received : 2019.07.24
  • Accepted : 2020.01.15
  • Published : 2020.02.28

Abstract

Brugmansia arborea L. (Solanaceae), commonly known as "angel's trumpet," is widely grown in North America, Africa, Australia, and Asia. It has been mainly used for ornamental purposes as well as analgesic, anti-rheumatic, vulnerary, decongestant, and anti-spasmodic materials. B. arborea is also reported to show anti-cholinergic activity, for which many alkaloids were reported to be principally responsible. However, to the best of our knowledge, a phytochemical study of B. arborea flowers has not yet been performed. Four flavonol glycosides (1-4) and one dihydroflavanol (5) were for the first time isolated from B. arborea flowers in this study. The flavonoids showed significant antioxidant capacities, suppressed nitric oxide production in lipopolysaccharide (LPS)-treated RAW 264.7 cells, and reduced inducible nitric oxide synthase (iNOS) and cyclooxygenase (COX-2) protein production increased by LPS treatment. The contents of compounds 1-4 in n-BuOH fraction were determined to be 3.8 ± 0.9%, 2.2 ± 0.5%, 20.3 ± 1.1%, and 2.3 ± 0.4%, respectively, and that of compound 5 in EtOAc fraction was determined to be 12.7 ± 0.7%, by HPLC experiment. These results suggest that flavonol glycosides (1-4) and dihydroflavanol (5) can serve as index components of B. arborea flowers in standardizing anti-inflammatory materials.

Keywords

References

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