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Yanggu, South Korea

Ryu H.W.,Korea Research Institute of Bioscience and Biotechnology | Song H.-H.,Agency for Korea National Food Cluster AnFC | Shin I.-S.,Chonnam National University | Cho B.O.,Ato Q and A corporation | And 4 more authors.
Journal of Functional Foods | Year: 2015

Resveratrol oligomers from the extract of Peaonia lactiflora seeds were investigated for the first time and their potential role as nutraceuticals to treat airway inflammation based on their anti-inflammatory activity examined. After the isolation of five major peaks (suffruticosol B, suffruticosol A, trans-ε-viniferin, trans-gnetin H, and cis-suffruticosol D) of a P. lactiflora extract using a one-step high-speed counter current chromatograhy (HSCCC) process, the anti-inflammation activity of each compound was evaluated in the LPS-stimulated RAW264.7 macrophages. Suffruticosol A showed potent levels of inhibition in the expression/production of NO, iNOS, and pro-inflammatory cytokines (TNF-α, IL-6, and IL-1β) in the assay. Additionally, suffruticosol A exhibited a significant suppression of the increased inflammatory cell count, protein content, pro-inflammatory cytokines and the production of reactive oxygen species in the bronchoalveolar lavage fluid of acute airway inflammation murine model, in which cigarette smoke and LPS exposure were both used as pro-inflammatory stimuli. These experimental results indicate that suffruticosol A has significant effects both in vitro and in vivo to be a potential candidate for airway inflammation therapeutics based on its anti-inflammatory activity. © 2015 Elsevier Ltd. Source

Cho B.O.,Ato Q and A corporation | Cho B.O.,Jeonju University | Yin H.H.,Ato Q and A corporation | Park S.H.,Korea Atomic Energy Research Institute | And 4 more authors.
Bioscience, Biotechnology and Biochemistry | Year: 2016

Diospyros lotus is traditionally used for the treatment of diabetes, diarrhea, tumor, and hypertension. The purpose of this study was to investigate the anti-inflammatory effect and underlying molecular mechanisms of myricetin in lipopolysaccharide (LPS)-stimulated RAW264.7 macrophages. Myricetin dose-dependently suppressed the production of pro-inflammatory mediators (NO, iNOS, PGE2 , and COX-2) in LPS-stimulated RAW264.7 macrophages. Myricetin administration decreased the production of NO, iNOS, TNF-α, IL-6, and IL-12 in mice. Myricetin decreased NF-κB activation by suppressing the degradation of IκBα, nuclear translocation of p65 subunit of NF-κB, and NF-κB DNA binding activity in LPS-stimulated RAW264.7 macrophages. Moreover, myricetin attenuated the phosphorylation of STAT1 and the production of IFN-β in LPS-stimulated RAW264.7 macrophages. Furthermore, myricetin induced the expression of HO-1 through Nrf2 translocation. In conclusion, these results suggest that myricetin inhibits the production of pro-inflammatory mediators through the suppression of NF-κB and STAT1 activation and induction of Nrf2-mediated HO-1 expression in LPS-stimulated RAW264.7 macrophages. © 2016 Japan Society for Bioscience, Biotechnology, and Agrochemistry. Source

Jeon I.H.,Ato Q and A corporation | Kim H.S.,Jeonju University | Kang H.J.,Ato Q and A corporation | Lee H.-S.,Jeonju University | And 4 more authors.
Molecules | Year: 2014

Perilla (Perilla frutescens L.) leaves have shown therapeutic efficacy in the treatment of inflammatory disorders, allergies, bronchial asthma, and systemic damage due to free radicals. In the present study we analyzed the active constituents in perilla leaves using high-performance liquid chromatography (HPLC) and isolated luteolin, a polyphenolic flavonoid. We investigated the anti-inflammatory and antipruritic properties of luteolin. Luteolin inhibited the secretion of inflammatory cytokines such as interleukin- 1â (IL-1 â) and tumor necrosis factor-á (TNF-á) from human mast cells (HMC-1) stimulated with phorbol myristate acetate plus calcium ionophore A23187 in a dosedependent manner. Luteolin also significantly reduced the histamine release from rat peritoneal mast cells stimulated by compound 48/80, a potent histamine liberator. Furthermore, the administration of luteolin markedly inhibited the scratching behavior and vascular permeability induced by pruritogens, such as compound 48/80 or serotonin, in ICR mice. These results suggested that luteolin has potential as a therapeutic agent against inflammation and itch-related skin diseases. © 2014 by the authors. Source

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