Anti-inflammatory effect of seed oil of Schisandra chinensis in the LPS-treated RAW 264.7 macrophages Jang, Jae-Yoon; Park, Geun-Hye;
Objectives : This study was designed to investigate of the anti-inflammatory effects of Schisandra chinensis seed oil(SSO) on the production of pro-inflammatory substances in lipopolysaccharide (LPS)-stimulated RAW 264.7 macrophages.Methods : SSO was measured the production of pro-inflammatory factor (NO, PGE2, IL-1β iNOS and, COX-2) in lipopolysaccharide (LPS)-stimulated RAW 264.7 macrophages. we used the following methods : cell viability assay, Griess reagent assay, enzyme-linked immunosorbent assay, Western blotting analysis.Results : The cell viability of SSO(0∼500 μl/mL) processing group was 96.9% and the processing of SSO didn't have an effect on the cytotoxicity. The inhibitory effect of the nitric oxide (no) production of SSO(500 μg/mL, 50 μg/mL, 10 μg/mL) was each 70.3%, 37.6% and 26.5%. IL-1β production inhibition ability of SSO(500 μg/mL, 100 μg/mL) was each 49.88% and 48.8%. PGE2 production inhibition ability of SSO(500 μg/mL, 100 μg/mL) was each 49.88% and 73.1%, 70.5%. By using SSO, it experimented about iNOS protein expression inhibition ability, that is the NO production enzyme. iNOS protein expression increased in the group processing LPS independently. iNOS protein expression decreased in the group processing SSO together. The expression of the COX-2 protein decreased 89.6%, 81.8% in the group processing SSO. The significance was in the relationship with NO formation inhibition with the relationship with the PGE2 formation inhibition and iNOS protein, it confirmed in SSO with the COX-2 protein.Conclusions : Stimulation of the RAW 264.7 cells with LPS caused an elevated production of nitric oxide (NO), IL-1β and PGE2 which was markedly inhibited by the pretreatment with SSO without causing any cytotoxic effects. The reduced expressions of iNOS protein were consistent with the reductions in NO production in the culture media. SSO may be useful for the treatment of various inflammatory diseases.
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