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      • KCI등재

        LPS로 유도된 RAW 264.7 대식세포에 대한 대황(Eisenia bicyclis) 헥산 분획물의 항염증 효과

        김보운 ( Bowoon Kim ),최창근 ( Chang-geun Choi ),김재일 ( Jae-il Kim ),김형락 ( Hyeung-rak Kim ) 한국수산과학회(구 한국수산학회) 2021 한국수산과학회지 Vol.54 No.2

        Eisenia bicyclis is known to have secondary metabolites exhibiting various biological activities. In a preliminary study, the n-hexane fraction obtained from the ethanolic extract of E. bicyclis showed higher anti-inflammatory activity than the ethyl acetate and butyl alcohol fractions based on the inhibition of lipopolysaccharide (LPS)-stimulated nitric oxide (NO) production in RAW 264.7 cells. Using this fraction (E. bicyclis hexane fraction, EHF), we investigated the molecular mechanisms underlying its anti-inflammatory effect in LPS-stimulated RAW 264.7 cells. Pretreatment of the cells with up to 50 μg/mL EHF significantly inhibited NO and prostaglandin E2 production as well as their responsible enzyme proteins and mRNAs, in a dose-dependent manner (P<0.05). Similarly, EHF markedly reduced the production of pro-inflammatory cytokines, such as interleukin (IL)-1β, IL-6 and tumor necrosis factor (TNF)-α as well as their mRNA levels. Nuclear translocation of nuclear factor-kappa B (NF-κB) was strongly suppressed by EHF treatment. EHF significantly reduced the phosphorylation of mitogen-activated protein kinases and phosphatidylinositol 3-kinase/Akt in LPS-stimulated cells. Moreover, EHF reduced ear edema in phorbol myristate acetate (PMA)-induced mice. These results indicate that EHF contains potent anti-inflammatory compounds, which may be used as a dietary supplement for the prevention of inflammatory diseases.

      • KCI등재

        LPS로 유도된 RAW 264.7 대식세포에 대한 애기외톨개 모자반 (Myagropsis yendoi) 에틸아세테이트 분획물의 항염증 효과

        김보운 ( Bowoon Kim ),김재일 ( Jae Il Kim ),김형락 ( Hyeung Rak Kim ),변대석 ( Dae Seok Byun ) 한국수산과학회 2014 한국수산과학회지 Vol.47 No.5

        An ethanolic extract from Myagropsis yendoi was fractionated using several solvents. Among these, an ethyl acetate fraction (Myagropsis yendoi ethyl acetate fraction: MYE) showed the highest anti-inflammatory activity based on inhibition of lipopolysaccharides (LPS)-induced nitric oxide (NO) production in RAW 264.7 cells. We thus investi-gated the molecular mechanisms underlying MYE’s inhibitory effects. Pretreatment of cells with up to 30 μg/mL of MYE significantly inhibited NO production and inducible nitric oxide synthase expression in a dose-dependent man-ner (P<0.05). Similarly, MYE markedly reduced the production of pro-inflammatory cytokines, such as interleukin (IL)-1β, IL-6, and tumor necrosis factor (TNF)-α, as well as their mRNA levels. While the nuclear translocation of nuclear factor-kappa B (NF-κB) was strongly suppressed by MYE, the activation of a nuclear factor erythroid 2-re-lated factor (Nrf2) was increased. Moreover, MYE significantly reduced the phosphorylation of JNK, p38 MAPK, and phosphatidylinositol 3-kinase/Akt in LPS-stimulated cells. These results indicate that MYE contains anti-inflam-matory compounds, and that it might be used as a dietary supplement for the prevention of inflammatory diseases.

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