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논문 기본 정보

자료유형
학위논문
저자정보

서유미 (안동대학교, 安東大學校)

지도교수
金鍾湜
발행연도
2018
저작권
안동대학교 논문은 저작권에 의해 보호받습니다.

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Schizandra chinensis has been used as a traditional Chinese medicine and known to have various bioactive components including schizandrin and gomisin A. In the current study, we investigated anti-inflammatory activities and their working mechanisms of ethanol extracts of pomace of Schizandra chinensis (PSC), schizandrin (SZ) and gomisin A (GA). To begin with, we analyzed the effects of PSC on nitric oxide (NO) production and cell viabilities in lipopolysaccharide (LPS)-stimulated RAW 264.7 cells. The results indicated that PSC dramatically reduced NO production in LPS-activated RAW 264.7 cells in a dose-dependent manner without affecting cell viability. It also decreased the expression of pro-inflammatory genes iNOS and COX-2. In addition, PSC did inhibit phosphorylation of p38, ERK 1/2 JNK, and NF-κB p65 whereas the expression of their total protein was not changed. The results indicate that PSC could regulate LPS-induced inflammatory responses via suppressing MAPK (mitogen-activated protein kinase) and NF-κB (nuclear factor kappa-light-chain-enhancer of activated B cells) signaling. We also analyzed the effects of SZ and GA on NO production and cell viabilities in RAW 264.7 cells. The results showed that SZ and GA also decreased NO production in a dose dependent manner in LPS-activated RAW 264.7 cells without affecting cell viabilities. SZ reduced the expression of iNOS, whereas GA downregulates iNOS and COX-2. Furthermore, SZ inhibited phosphorylation of MAPK and NF-κB p65 but GA reduced phosphorylation of only ERK 1/2 and JNK MAPK. Overall, these findings may help to understand the molecular mechanisms of the anti-inflammatory effects mediated by PSC, SZ and GA.

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