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| 1 | Effect of thioredoxin-interacting protein on Wnt/β-catenin signaling pathway and diabetic myocardial infarction显示文摘Objective:To explore the regulatory role of thioredoxin-interacting protein(TXNIP) in Wnt/β-catenin signaling pathway and therefore to elucidate its function in diabetic myocardial infarction.Methods:Diabetic myocardial infarction models were generated in mice.The expression levels of TXNIP and β-catenin and level of reactive oxygen species(ROS) were determined and compared with those in control group.Human umbilical vein endothelial cells were treated with high-eoncentration glucose and/or silencing TXNIP and/or H_2O_2.After 24 h,expression levels of TXNIP、β-catenin and its downstream protein Cyclin D1,and C-myc gene were determined by real-time PCR,Western blot and immunofluorescence method.The cell proliferation and ROS production capability in different groups were determined by methyl thiazolyl tetrazolium assay.Results:Compared with control group,hyperglycemia significantly up-regulated TXNIP expression and ROS level in the myocardium and endothelial cells of myocardial infarction area,whereas the β-catenin expression was down-regulated,and the difference was statistically significant(P<0.05).In comparison with Human umbilical vein endothelial cells in the control group,high glucose level increased the levels of TXNIP expression and ROS level in cells,but reduced cell proliferation as well as migration capability and expression levels of β-catenin,Cyclin D1 and C-myc;the difference was statistically significant(P<0.05).However,this trend can be partially reversed by silencing TXNIP.Conclusions:Diabetic myocardial ischemia could up-regulate levels of TXNIP expression and ROS production in endothelial cells of myocardial infarction area.The regulation effect of TXNIP on β-catenin was partially achieved by changing ROS levels. | Hui Yu Xian-Xian Zhao Xing-Hua Shan Pan Li Tao Chen | 2015 | Asian Pacific Journal of Tropical Medicine2015，8，11： | 2 |
| 2 | 颈动脉血管重构患者核因子κB的变化及意义显示文摘目的探讨颈动脉血管重构患者核因子(NF)-κB的变化及意义。方法对老年体检人员血管行超声检测,选择38例具有颈动脉硬化血管重构者为研究对象(颈动脉重构组),以同龄颈动脉正常的老年人36例为对照组。常规检测心电图、胸片、血液生化等指标,同时用免疫组化方法检测外周血单核细胞NF-κB活化表达率。用直线回归分析法探讨颈动脉血管重构与NF-κB活化率的相关性。结果 1颈动脉重构组与对照组比较,颈动脉内径较对照组增宽,内膜-中层厚度(IMT)及斑块积分显著增加。2颈动脉重构组外周血单核细胞NF-κB活化率显著高于对照组(P<0.05)。3颈动脉重构组NF-κB水平与颈动脉IMT、颈动脉斑块积分呈显著正相关。结论颈动脉重构与NF-κB活化率密切相关,NF-κB可能参与了颈动脉重构及粥样斑块形成的过程。 | 郑舒展 李郁 罗兴林 | 2015 | 中国老年学杂志2015，35，7： | 1 |
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