绣球藤提取物的抗炎活性及机制
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篇名: 绣球藤提取物的抗炎活性及机制
TITLE: Anti-inflammatory activity and mechanism of Clematis ranunculoides extract
摘要: 目的 探讨绣球藤提取物的抗炎活性及潜在机制。方法使用二甲苯致耳廓肿胀建立急性炎症小鼠模型,以阿司匹林(0.25g/kg)为阳性对照,1.25、2.5、5g/kg绣球藤提取物对小鼠耳肿胀度的影响。以植入棉球的方法建立慢性炎症大鼠模型,以阿司匹林(0.17g/kg)为阳性对照,0.88、1.75、3.5g/kg绣球藤提取物对大鼠肉芽净重的影响。以脂多糖诱导RAW264.7细胞建立炎症损伤细胞模型,考察12.5、25、50μg/mL绣球藤提取物对细胞上清液中一氧化氮(NO)、前列腺素E(2PGE2)、肿瘤坏死因子α(TNF-α)、白细胞介素6(IL-6)、单核细胞趋化蛋白1(MCP-1)含量,细胞中诱导型一氧化氮合酶(iNOS)、环氧合酶2(COX-2)、p65、磷酸化p65(p-p65)蛋白表达水平,以及p65蛋白核转移的影响。结果5g/kg的绣球藤提取物可显著降低小鼠的耳肿胀度,1.75、3.5g/kg的绣球藤提取物可显著降低大鼠的肉芽净重(P<0.05)。12.5、25、50μg/mL绣球藤提取物可显著降低细胞上清液中NO(12.5μg/mL绣球藤提取物除外)、PGE2、TNF-α、IL-6、MCP-1含量,以及细胞中iNOS、COX-2蛋白的相对表达量和p-p65、p65蛋白的相对表达量比值(P<0.05或P<0.01);25、50μg/mL绣球藤提取物可阻断p65蛋白的核转移。结论绣球藤提取物具有良好的抗炎活性,其作用机制可能与抑制核因子κB信号通路激活、下调COX-2和iNOS蛋白的表达、减少炎症因子的释放有关。
ABSTRACT: OBJECTIVE To investigate the anti-inflammatory activity and potential mechanism of Clematis ranunculoides extract. METHODS The ear swelling was induced by xylene to establish an acute inflammation model of mice; using aspirin (0.25 g/kg) as a positive control, the effects of 1.25, 2.5, 5 g/kg C. ranunculoides extract on the degree of ear swelling were investigated. The chronic inflammation model of rats was also established by implanting cotton balls; using aspirin (0.17 g/kg) as a positive control, the effects of 0.88, 1.75, 3.5 g/kg C. ranunculoides extract on the net weight of granulomas were investigated. Furthermore, RAW264.7 cells were induced by lipopolysaccharide to establish an inflammatory injury model; the effects of 12.5, 25, 50 μg/mL C. ranunculoides extract on the contents of nitric oxide(NO), prostaglandin E2(PGE2), tumor necrosis factor-α (TNF-α), interleukin-6(IL-6) and monocyte chemotactic protein-1(MCP-1) in the cell supernatant, the protein expressions of inducible nitric oxide synthase(iNOS), cyclooxygenase-2(COX-2), p65 and phosphorylated p65(p-p65) in cells as well as nuclear translocation of p65 protein were assessed. RESULTS C. ranunculoides extract with 5 g/kg significantly relieved ear swelling in mice, and C. ranunculoides extract with 1.75, 3.5 g/kg significantly decreased the net weight of granulomas in rats (P<0.05). C. ranunculoides extract with 12.5, 25, 50 μg/mL significantly reduced the contents of NO (except for 12.5 μg/mL C. ranunculoides extract), PGE2, TNF-α, IL-6 and MCP-1 in the cell supernatant, as well as the relative expressions of iNOS and COX-2 protein, and relative expression ratio of p-p65 and p65 protein (P<0.05 or P<0.01); C. ranunculoides extract with 25, 50 μg/mL inhibited the translocation of p65 protein to the cell nucleus. CONCLUSIONS C. ranunculoides extract exhibits significant anti- inflammatory activity, the mechanism of which may be attributed to the inhibition of the activation of nuclear factor-κB signaling pathway, down-regulation of COX-2 and iNOS protein expression, and the reduction of inflammatory cytokines release.
期刊: 2024年第35卷第04期
作者: 李海山;杨和金;郑永仁
AUTHORS: LI Haishan,YANG Hejin,ZHENG Yongren
关键字: 绣球藤提取物;抗炎活性;巨噬细胞;核因子κB信号通路
KEYWORDS: Clematis ranunculoides extract; anti-inflammatory
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