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Korean Society for Biochemistry and Molecular Biology (생화학분자생물학회)
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Glycosyl flavones from Humulus japonicus suppress MMP-1 production via decreasing oxidative stress in UVB irradiated human dermal fibroblasts

  • Nam, Eui Jeong (New Product Development Team, COSMAXNBT) ;
  • Yoo, Gyhye (Smart Farm Research Center, Korea Institute of Science and Technology (KIST) Gangneung Institute) ;
  • Lee, Joo Young (Natural Products Research Center, Korea Institute of Science and Technology (KIST) Gangneung Institute) ;
  • Kim, Myungsuk (Smart Farm Research Center, Korea Institute of Science and Technology (KIST) Gangneung Institute) ;
  • Jhin, Changho (Smart Farm Research Center, Korea Institute of Science and Technology (KIST) Gangneung Institute) ;
  • Son, Yang-Ju (Smart Farm Research Center, Korea Institute of Science and Technology (KIST) Gangneung Institute) ;
  • Kim, Sun Young (Smart Farm Research Center, Korea Institute of Science and Technology (KIST) Gangneung Institute) ;
  • Jung, Sang Hoon (Natural Products Research Center, Korea Institute of Science and Technology (KIST) Gangneung Institute) ;
  • Nho, Chu Won (Smart Farm Research Center, Korea Institute of Science and Technology (KIST) Gangneung Institute)
  • Received : 2019.10.22
  • Accepted : 2020.01.07
  • Published : 2020.07.31
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Abstract

Exposure to Ultraviolet (UV) light induces photoaging of skin, leading to wrinkles and sunburn. The perennial herb Humulus japonicus, widely distributed in Asia, is known to have anti-inflammatory, antimicrobial, and antioxidant effects. However, the physiological activities of isolated compounds from H. japonicus have rarely been investigated. This study focused on the isolation of active compounds from H. japonicus and the evaluation of their effects on photoaging in UVB-irradiated human fibroblast (Hs68) cells. When the extract and four fractions of H. japonicus were treated respectively in UVB-irradiated Hs68 cells to investigate anti-photoaging effects, the ethyl acetate (EtOAc) fraction showed the strongest inhibitory effect on MMP1 secretion. From EtOAc fraction, we isolated luteolin-8-C-glucoside (1), apigenin-8-C-glucoside (2), and luteolin-7-O-glucoside (3). These compounds suppressed UVB-induced MMP-1 production by inhibiting the phosphorylation of the mitogen-activated protein kinases (MAPKs) and activator protein-1 (AP-1). When the antioxidant activity of the compounds were estimated by conducting western blot, calculating the bond dissociation energies of the O-H bond (BDE) at different grade, and measuring radical scavenging activity, we found luteolin-8-C-glucoside (1) showed the strongest activity on the suppression of UVB-induced photoaging. These results demonstrate the inhibitory effect of three flavone glycosides derived from H. japonicus on MMP-1 production, MAPK and AP-1 signaling, and oxidative stress; this could prove useful in suppressing UVB induced photoaging.

Keywords

References

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