| 姜华,张艳,王辰.益气活血复方含药血清对人脐静脉内皮细胞TLR4及其下游髓样分化因子88、肿瘤坏死因子受体相关因子-6表达的影响[J].,2010,30(5):519-522 |
| 益气活血复方含药血清对人脐静脉内皮细胞TLR4及其下游髓样分化因子88、肿瘤坏死因子受体相关因子-6表达的影响 |
| Effect of Yiqi Huoxue Recipe Containing Drug-serum on the Toll-like Receptor-4 and Its Downstream Signaling Components MyD88 as well as the Tumor Necrosis Factor Receptor Related Factor-6 in Human Vein Endothelial Cells |
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| DOI： |
| 中文关键词: 中药含药血清 内皮细胞 Toll样受体4 髓样分化因子88 肿瘤坏死因子受体相关因子-6 动脉粥样硬化 |
| 英文关键词:drug-serum human vein endothelial cell Toll-like receptor-4 myeloid differentiation factor D88 tumor necrosis factor receptor related factor-6 atherosclerosis |
| 基金项目:辽宁省教育厅科学技术研究项目(No.20060534) |
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| 中文摘要: |
| 目的研究益气活血复方含药血清对脂多糖(lipopolysaccharide,LPS)诱导的人脐静脉内皮细胞(human umbilical vein endothelial cells,HUVECs)Toll样受体4(TLR4)及其下游信号转导通路主要元件髓样分化因子88(MyD88)、肿瘤坏死因子受体相关因子-6(TRAF-6)表达的影响,从mRNA和蛋白水平探讨益气活血复方含药血清防治动脉粥样硬化的机制。方法选择新西兰大耳白兔20只,随机分为4组,即正常组、中药高、中、低浓度(1.6、0.8、0.4g/mL)组,每组5只。各组白兔分别以生理盐水和高、中、低浓度益气活血复方连续灌胃7天。末次灌胃给药2h后,心脏采血,离心后分离血清。体外培养HUVECs,随机分为6组,即空白对照组、模型组、西药对照组、中药高、中、低浓度组,用LPS刺激后,分别加入高、中、低浓度益气活血复方含药血清干预24h,收集细胞,用荧光定量PCR方法和Western blotting法分别测定TLR4、MyD88及TRAF-6 mRNA和蛋白的表达。结果用LPS刺激HUVECs后,引起TLR4、MyD88及TRAF-6 mRNA和蛋白的高表达(与空白对照组比较,P<0.01),用益气活血复方含药血清干预以后显著抑制TLR4、MyD88及TRAF-6 mRNA和蛋白的高表达(与模型组比较,P<0.01,P<0.05)。结论益气活血复方可阻断TLR4高表达,同时阻断TLR4胞内信号转导的MyD88依赖性途径,抑制下游NF-κB以及各种相关基因表达,这可能是其抗动脉粥样硬化的作用机制之一。 |
| 英文摘要: |
| Objective To investigate the influence of Yiqi Huoxue Recipe (YHR) containing drug-serum on the expression of Toll-like receptor-4 (TLR4) and its downstream signaling components MyD88, as well as the tumor necrosis factor receptor related factor-6 (TRAF-6) in human vein endothelial cells (HUVECs) induced by lipopolysaccharide (LPS), and to study its possible anti-atherosclerotic mechanism from the gene and protein levels. Methods Twenty New Zealand male rabbits were equally divided into four groups in random: the normal control group and the three YHR groups, 5 in each group. They were gastric perfused daily with normal saline and YHR in low, moderate and high concentration respectively. Blood drawn from rabbits′ heart 2 h after ending perfusion on the 7th day, and the serum separated (that is the drug-serum) was taken for testing. HUVECs were cultured in vitro and equally divided into six groups in random: the normal control group, the model group, the Western medicine group and the three YHR groups. HUVECs were stimulated with LPS, then treated separately with the drug-serum containing different concentrations of YHR for 24 h. Then the mRNA expressions of TLR4, MyD88 and TRAF-6 were measured with Real-time PCR, and their protein expressions were analyzed using Western blotting. Results Protein and mRNA expressions of TLR4, MyD88 and TRAF-6 increased significantly after LPS stimulation (P<0.01 ), but the changes in the drug-serum treated groups were significantly lower than those in the saline control group respectively (P<0.01 or P<0.05 ). Conclusion YHR can block the high expression of TLR4, and also influence the MyD88-dependent signaling pathway of TLR4, suppress the downstream expression of NF-κB and various related gene expressions, which may be one of its mechanisms of action for anti-atherosclerosis. |
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