RAW 264.7 대식세포에서 유산균으로 발효한 다시마와 톳의 항염증 효과

다국어 초록 (Multilingual Abstract)

This study was conducted to investigate alterations of seaweed composition upon Lactobacillus rhamnosus GG (LGG) fermentation as well as potential anti-inflammatory effects and mechanism (s) of water extracts and fermented water extracts of Laminaria japonica (LJ) and Hizikia fusiforme (HF) in lipopolysaccharide (LPS)-stimulated RAW264.7 macrophages. Total polyphenol, total sugar, and reducing sugar contents were measured in LJ and HF water extracts before and after fermentation by LGG. Alterations of inflammatory cytokine levels in cell culture media were measured by ELISA, and levels of phosphorylation of c-jun NH2-terminalkinase (JNK) and extra cellular signal regulated kinase (ERK) were examined by Western blot analysis. LGG fermentation of LJ and HF altered total polyphenol and sugar contents in water extracts of LJ and HF. LPS-induced production of pro-inflammatory cytokines such as IL-6 and TNF-α was significantly reduced by HF-f compared to control in RAW264.7 cells. Consistent with reduction of anti-inflammatory cytokine, interleukin (IL)-6, and tumor necrosis factor (TNF)-α levels by HF-f, HF-f also significantly reduced phosphorylation of ERK and JNK in LPS-stimulated RAW264.7 cells. In addition, LJ-f and HF also significantly reduced phosphorylation of JNK and ERK induced by LPS in RAW264.7 cells. Overall, our result suggests that HF-f among the four tested seaweed extracts is the most potent antiinflammatory agent, and its mechanism of action is partially mediated by reduction of JNK and ERK phosphorylation as well as IL-6 and TNF-α production in LPS-stimulated RAW264.7 cells.

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