Aim This study was to evaluate the effect of arsenic trioxide (As2O3) on the transgenic TNF-α promoter activity in cultured vascular smooth muscle cells (VSMCs) and THP-1 monocytes. Methods Human TNF-α promoter ...Aim This study was to evaluate the effect of arsenic trioxide (As2O3) on the transgenic TNF-α promoter activity in cultured vascular smooth muscle cells (VSMCs) and THP-1 monocytes. Methods Human TNF-α promoter was constructed by reporter gene system and was transiently transfected into VSMCs and THP-1 in vitro. The promoter activity was tested by luciferase activity with or without LPS and Ang Ⅱ stimulation, before and after different dosage of As2O3 treatment. Results 1. TNF-α promoter effectively expressed in VSMCs and THP-1 compared with CMV promoter (58.3% and 80.9%, respectively). Both LPS and Ang Ⅱ significantly up-regulated TNF-α promoter activity (P〈0.05). 2. As2O3 significantly inhibited, both intact and LPS/Ang Ⅱ stimulated promoter activity, in a dose dependent manner (P〈0.05), and in both cell type. Conclusion These results manifested that, the inhibition effect of As2O3 on the activity of human TNF-α promoter indicated its potential inhibition on pro-inflammatory cytokine genes expression at transcriptional level and its potential anti-inflammatory property in the cardiovascular system.展开更多
目的进一步观察白藜芦醇对急性心肌梗死(AMI)后心血管系统保护作用的机制。方法将32只新西兰大耳兔随机分为四组各8只,B、C、D组通过结扎左冠脉前降支建立AMI模型,A组(假手术组)除不结扎动脉外余步骤同上。术后24 h A、B组予生理盐水灌...目的进一步观察白藜芦醇对急性心肌梗死(AMI)后心血管系统保护作用的机制。方法将32只新西兰大耳兔随机分为四组各8只,B、C、D组通过结扎左冠脉前降支建立AMI模型,A组(假手术组)除不结扎动脉外余步骤同上。术后24 h A、B组予生理盐水灌胃,C组予长效消心痛+生理盐水灌胃,D组予白藜芦醇+生理盐水灌胃。各组均持续给药15 d后处死,留取心肌标本,于-80℃保存或4%福尔马林固定后制作石蜡切块,检测心肌梗死面积及梗死边缘区心肌组织微血管密度(MVD)、血管内皮生长因子(VEGF)、促血管生成素-1(Ang-1)表达。结果C组及D组心肌梗死面积明显小于B组,梗死边缘区MVD及VEGF、Ang-1表达明显高于B组(P均<0.05),D组Ang-1表达显著高于C组(P<0.05)。结论白藜芦醇可促进AMI后心脏血管新生及冠脉侧支循环形成,可作为不能耐受硝酸酯类药物且不适于介入、外科搭桥术冠心病患者的替代药物。展开更多
基金National Natural Science Foundation of China(No.30170368)
文摘Aim This study was to evaluate the effect of arsenic trioxide (As2O3) on the transgenic TNF-α promoter activity in cultured vascular smooth muscle cells (VSMCs) and THP-1 monocytes. Methods Human TNF-α promoter was constructed by reporter gene system and was transiently transfected into VSMCs and THP-1 in vitro. The promoter activity was tested by luciferase activity with or without LPS and Ang Ⅱ stimulation, before and after different dosage of As2O3 treatment. Results 1. TNF-α promoter effectively expressed in VSMCs and THP-1 compared with CMV promoter (58.3% and 80.9%, respectively). Both LPS and Ang Ⅱ significantly up-regulated TNF-α promoter activity (P〈0.05). 2. As2O3 significantly inhibited, both intact and LPS/Ang Ⅱ stimulated promoter activity, in a dose dependent manner (P〈0.05), and in both cell type. Conclusion These results manifested that, the inhibition effect of As2O3 on the activity of human TNF-α promoter indicated its potential inhibition on pro-inflammatory cytokine genes expression at transcriptional level and its potential anti-inflammatory property in the cardiovascular system.
文摘目的进一步观察白藜芦醇对急性心肌梗死(AMI)后心血管系统保护作用的机制。方法将32只新西兰大耳兔随机分为四组各8只,B、C、D组通过结扎左冠脉前降支建立AMI模型,A组(假手术组)除不结扎动脉外余步骤同上。术后24 h A、B组予生理盐水灌胃,C组予长效消心痛+生理盐水灌胃,D组予白藜芦醇+生理盐水灌胃。各组均持续给药15 d后处死,留取心肌标本,于-80℃保存或4%福尔马林固定后制作石蜡切块,检测心肌梗死面积及梗死边缘区心肌组织微血管密度(MVD)、血管内皮生长因子(VEGF)、促血管生成素-1(Ang-1)表达。结果C组及D组心肌梗死面积明显小于B组,梗死边缘区MVD及VEGF、Ang-1表达明显高于B组(P均<0.05),D组Ang-1表达显著高于C组(P<0.05)。结论白藜芦醇可促进AMI后心脏血管新生及冠脉侧支循环形成,可作为不能耐受硝酸酯类药物且不适于介入、外科搭桥术冠心病患者的替代药物。