蛇葡萄素F对脂多糖致炎模型细胞的抗炎作用及其机制研究
2018-09-10梁晓玲马利赖月花侯连兵
梁晓玲 马利 赖月花 侯连兵
摘 要 目的:研究蛇葡萄素F(AMPF)对脂多糖(LPS)致炎模型细胞的抗炎作用及其机制。方法:以RAW264.7细胞为模型细胞,采用CCK-8法测定不同质量浓度(100、40、20、10、5 μg/mL)的AMPF处理不同时间(24、48、72 h)后的细胞活性。设正常对照组、模型组和AMPF高、中、低剂量组(40、20、10 μg/mL),分别未加药物处理或加入相应质量浓度的AMPF溶液处理后培养24 h[除正常对照组外,其余各组均在培养1 h时加入LPS(1 μg/mL)致炎造模]。测定各组细胞中白细胞介素1β(IL-1β)、IL-6、肿瘤坏死因子α(TNF-α)和一氧化氮(NO)的含量,以及环氧合酶2(COX-2)和一氧化氮合酶(iNOS)的蛋白表达水平。结果:当培养时间为24 h时,AMPF各质量浓度组(100、40、20、10、5 μg/mL)细胞存活率均高于90%,AMPF未对细胞产生明显毒性。与模型组比较,AMPF高、中、低剂量组细胞中IL-1β的含量和iNOS的蛋白表达水平均显著降低,高剂量组细胞中IL-6、TNF-α、NO的含量均显著降低,高、中剂量组细胞中COX-2的蛋白表达水平均显著降低,差异均有统计学意义(P<0.05或P<0.01),并呈现一定的剂量依赖性。结论:AMPF对LPS诱导的RAW264.7细胞炎症具有显著的抑制作用,其机制可能与AMPF調控COX-2和iNOS的表达,进而抑制NO的释放,降低IL-1β、IL-6和TNF-α的含量有关。
关键词 蛇葡萄素F;RAW264.7细胞;脂多糖;炎症;炎症因子
中图分类号 R285 文献标志码 A 文章编号 1001-0408(2018)14-1927-04
DOI 10.6039/j.issn.1001-0408.2018.14.13
ABSTRACT OBJECTIVE: To study the anti-inflammatory effect of ampelopsin F (AMPF) on lipopolysaccharide (LPS)-induced inflammatory model cells and its mechanism. METHODS: Using RAW264.7 cell as model cell, CCK-8 assay was used to determine the activity of cell after treated for different duration (24, 48, 72 h) with different concentration (100, 40, 20, 10, 5 μg/mL) of AMPF. Then the cells were divided into control group, model group and AMPF high-dose, medium-dose and low-dose groups (40, 20, 10 μg/mL). They were cultured without or with relevant AMPF solution for 24 h [Except for normal control group, other groups received LPS (1 μg/mL) to induce inflammatory model after cultured for 1 h]. The contents of IL-1β, IL-6, TNF-α and NO, the protein expression of COX-2 and iNOS were detected in cell culture supernatant. RESULTS: After cultured for 24 h, survival rates of cells in AMPF groups (100, 40, 20, 10, 5 μg/mL) were all higher than 90%, showing no obvious cytotoxicity of AMPF. Compared with model group, the content of IL-1β and the protein expression of iNOS were decreased significantly in AMPF high-dose, medium-dose and low-dose groups; the contents of IL-6, TNF-α and NO were decreased significantly in AMPF high-dose group; the protein expression of COX-2 were decreased significantly in AMPF high-dose and medium-dose groups, with statistical significance (P<0.05 or P<0.01), in dose-dependent manner. CONCLUSIONS: AMPF shows significant anti-inflammatory effect on LPS-induced RAW264.7 cell inflammation, the mechanism of which may be associated with regulating the expression of COX-2 and iNOS, inhibiting the release of NO and decreasing the contents of IL-1β, IL-6, TNF-α and NO.
KEYWORDS Ampelopsin F; RAW264.7 cells; Lipopolysaccharide; Inflammation; Inflammatory factor
金刚藤又名菝葜,为百合科植物菝葜(Smilax china L.)的根茎,具有祛风、活血、解表、收敛止血等功效[1];其相关制剂用于慢性盆腔炎的临床治疗效果也得到了证实[2]。本课题组前期研究发现,金刚藤总黄酮提取物对慢性盆腔炎模型大鼠具有良好的药效[3-4]。Jin Q等[5]从金刚藤总黄酮提取物中分离出多个单体成分,蛇葡萄素F(Ampelopsin F,AMPF)作为其中具有抗慢性盆腔炎作用的单体化合物之一,已被证实具有抗氧化活性。但关于AMPF的药理药效学等方面的研究报道甚少。小鼠腹腔巨噬细胞系RAW264.7具有免疫调节作用,常作为免疫相关研究的模型细胞系[6]。……
