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- Title
Anti-inflammatory effect of Vaccinium oldhamii stems through inhibition of NF-κB and MAPK/ATF2 signaling activation in LPS-stimulated RAW264.7 cells.
- Authors
Kim, Ha Na; Baek, Jueng Kyu; Park, Su Bin; Kim, Jeong Dong; Son, Ho-Jun; Park, Gwang Hun; Eo, Hyun Ji; Park, Jae Ho; Jung, Hyuk-Sang; Jeong, Jin Boo
- Abstract
Background: Vaccinium oldhamii (V. oldhamii) has been reported to exert a variety of the pharmacological properties such as anti-oxidant activity, anti-cancer activity, and inhibitory activity of α-amylase and acetylcholinesterase. However, the anti-inflammatory activity of V. oldhamii has not been studied. In this study, we aimed to investigate anti-inflammatory activity of the stem extracts from V. oldhamii, and to elucidate the potential mechanisms in LPS-stimulated RAW264.7 cells. Methods: Cell viability was evaluated by MTT assay. The determination of NO and PGE2 production was performed using Griess reagent and Prostaglandin E2 ELISA Kit, respectively. The change of mRNA or protein level was evaluated by RT-PCR and Western blot. Results: Among VOS, VOL and VOF, the inhibitory effect of NO and PGE2 production induced by LPS was highest in VOS treatment. Thus, VOS was selected for the further study. VOS dose-dependently blocked LPS-induced NO and PGE2 production by inhibiting iNOS and COX-2 expression, respectively. VOS inhibited the expression of pro-inflammatory cytokines such as IL-1β, IL-6 and TNF-α. In addition, VOS suppressed TRAP activity and attenuated the expression of the osteoclast-specific genes such as NFATc1, c-FOS, TRAP, MMP-9, cathepsin K, CA2, OSCAR and ATPv06d2. VOS inhibited LPS-induced NF-κB signaling activation through blocking IκB-α degradation and p65 nuclear accumulation. VOS inhibited MAPK signaling activation by attenuating the phosphorylation of ERK1/2, p38 and JNK. Furthermore, VOS inhibited ATF2 phosphorylation and blocked ATF2 nuclear accumulation. Conclusions: These results indicate that VOS may exert anti-inflammatory activity by inhibiting NF-κB and MAPK/ATF2 signaling. From these findings, VOS has potential to be a candidate for the development of chemopreventive or therapeutic agents for the inflammatory diseases.
- Subjects
ANTI-inflammatory agents; CELLULAR signal transduction; ENZYME-linked immunosorbent assay; MACROPHAGES; MESSENGER RNA; PHOSPHORYLATION; POLYMERASE chain reaction; PROSTAGLANDINS E; PROTEINS; PLANT stems; WESTERN immunoblotting; DNA-binding proteins; PLANT extracts; LIPOPOLYSACCHARIDES; CELL survival
- Publication
BMC Complementary & Alternative Medicine, 2019, Vol 19, Issue 1, pN.PAG
- ISSN
1472-6882
- Publication type
Article
- DOI
10.1186/s12906-019-2720-4