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免疫球蛋白IgG对H_2O_2所致内皮细胞损伤的抑制作用及其机制
Authors
常贺
李刚
王焱
邹军
Publication date
20 December 2012
Publisher
Abstract
目的探讨免疫球蛋白IgG对H2O2诱导的内皮细胞的黏附分子和趋化因子的表达及作用机制。方法IgG和H2O2加入内皮细胞中孵育2 h,应用RT-PCR以及实时定量RT-PCR检测黏附因子(ICAM-1、VCAM-1、E-se-lectin)及趋化因子(MCP-1、CXCL-1、MIP-2)的mRNA及蛋白表达;进一步应用Western blot检测IgG对H2O2诱导的p38、ERK1/2和JNK1/2的磷酸化情况。结果 H2O2可显著诱导黏附分子(ICAM-1、VCAM-1和E-selectin)、趋化因子(MCP-1、CXCL-1、MIP-2)的表达,而IgG对H2O2诱导的这些因子的表达有抑制作用;且IgG可抑制H2O2诱导的p38、JNK1/2和ERK1/2的磷酸化。结论 IgG对H2O2诱导的内皮细胞黏附分子及趋化因子表达的抑制作用可能通过抑制p38、JNK1/2、ERK1/2的信号通路实现,这可能是IgG调节内皮细胞炎症的机制之一
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Last time updated on 16/06/2016