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Evaluation of in vitro anti-oxidant and anti-inflammatory activities of Korean and Chinese Lonicera caerulea

  • Lee, You-Suk (Department of Food and Nutrition, College of BioNano Technology, Gachon University) ;
  • Cho, Il Je (The Medical Research Center for Globalization of Herbal Formulation and Department of Herbal Formulation, College of Oriental Medicine, Daegu Haany University) ;
  • Kim, Joo Wan (Department of Internal Medicine, College of Veterinary Medicine, Kyungpook National University) ;
  • Lee, Sun-Kyoung (Department of Life Physical Education, Myongji University) ;
  • Ku, Sae Kwang (Department of Anatomy and Histology, College of Oriental Medicine, Daegu Haany University) ;
  • Lee, Hae-Jeung (Department of Food and Nutrition, College of BioNano Technology, Gachon University)
  • Received : 2018.05.28
  • Accepted : 2018.08.13
  • Published : 2018.12.01

Abstract

BACKGROUND/OBJECTIVE: The honeysuckle berry (HB) contains ascorbic acid and phenolic components, especially anthocyanins, flavonoids, and low-molecular-weight phenolic acids. In order to examine the potential of HB as a hepatoprotective medicinal food, we evaluated the in vitro anti-oxidant and anti-inflammatory activities of Korean HB (HBK) and Chinese HB (HBC). MATERIALS/METHODS: Antioxidant and anti-inflammatory effects of the extracts were examined in HepG2 and RAW 264.7 cells, respectively. The anti-oxidant capacity was determined by DPPH, SOD, CAT, and ARE luciferase activities. The production of nitric oxide (NO) as an inflammatory marker was also evaluated. The Nrf2-mediated mRNA levels of heme oxygenase-1 (HO-1), NAD(P)H dehydrogenase [quinone] 1 (Nqo1), and glutamate-cysteine ligase catalytic subunit (Gclc) were measured. The concentrations of HB extracts used were 3, 10, 30, 100, and $300{\mu}g/mL$. RESULTS: The radical scavenging activity of all HB extracts increased in a concentration-dependent manner (P < 0.01 or P < 0.05). SOD (P < 0.05) and CAT (P < 0.01) activities were increased by treatment with $300{\mu}g/mL$ of each HB extract, when compared to those in the control. NO production was observed in cells pretreated with 100 or $300{\mu}g/mL$ of HBC and HBK (P < 0.01). Treatment with $300{\mu}g/mL$ of HBC significantly increased Nqo1 (P < 0.01) and Gclc (P < 0.05) mRNA levels compared to those in the control. Treatment with $300{\mu}g/mL$ of HBK (P < 0.05) and HBC (P < 0.01) also significantly increased the HO-1 mRNA level compared to that in the control. CONCLUSIONS: Thus, the Korean and Chinese HBs were found to possess favorable in vitro anti-oxidant and anti-inflammatory activities. Nrf2 and its related anti-oxidant genes were associated with both anti-oxidant and anti-inflammatory activities in HB-treated cells. Further studies are needed to confirm these in vivo effects.

Keywords

References

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