The aim of our study was to gain insight into the molecular and cellular mechanisms of post-angioplasty restenosis using balloon catheter-induced injury model in the rat carotid artery. SD rats were subjected balloon ...The aim of our study was to gain insight into the molecular and cellular mechanisms of post-angioplasty restenosis using balloon catheter-induced injury model in the rat carotid artery. SD rats were subjected balloon catheterization at one side carotid artery as study group and another side as control group. Six rats were killed on the 6 h, and 3rd, 7th, 14th, 28th day after balloon-induced injury respectively. The intimal thickness and the expression of NF-κB and I-κB were detected by HE-staining, gel electrophoretic mobility shift assay （EMSA） and Western-blot methods. The results showed that： （1） The thickening of intima was observed on the 3rd day after balloon-induced injury, and it became more significant on the 7th, 14th and 28th day. The area ratio of intima/media was increased significantly （P〈0.05）; （2） The expression of NF-κB was not detectable in the control group, however, in study group, the expression of NF-κB was detected on the 6th h after balloon-induced injury, reached the peak on the 14th day, and on 28th day, strong expression of NF-κB was observed; （3） The expression of I-κB protein was reduced after balloon-induced injury, and there were significant differences between the study group and the control group （P〈0.05）. It was concluded that the alteration of NF-κB/I-κB system might play an important role in aberrant proliferation within the intima and vascular remodeling following vascular injury. To block NF-κB activation and its role in arterial restenosis initiation may potentially provide a novel therapeutic tool for the treatment and prevention of arterial restenosis.展开更多
目的:研究核因子κB抑制蛋白(IκBα)在急性胰腺炎(AP)大鼠胰腺和肝脏组织中的表达及中药新清胰汤Ⅱ号[Q ing Y i TangⅡ(QYT)]的影响。方法:70只SD大鼠随机被分为正常对照组(n=10)、AP+QYT组(n=30)、AP+生理盐水(NS)组(n=30)。经胰胆...目的:研究核因子κB抑制蛋白(IκBα)在急性胰腺炎(AP)大鼠胰腺和肝脏组织中的表达及中药新清胰汤Ⅱ号[Q ing Y i TangⅡ(QYT)]的影响。方法:70只SD大鼠随机被分为正常对照组(n=10)、AP+QYT组(n=30)、AP+生理盐水(NS)组(n=30)。经胰胆管逆行注射4%去氧胆酸钠复制AP模型;给予QYT(AP+QYT组)或NS(AP+NS组)灌胃,每5 h重复1次。造模后1 h、4 h和10 h分批处死动物。荧光定量RT-PCR、W estern b lot-ting分别检测胰腺和肝脏组织IκBα在mRNA水平和蛋白水平的表达,后者包括磷酸化形式和非磷酸化形式;ELISA法检测血清白三烯C4(LTC4)浓度;HE染色观察胰腺和肺组织病理学变化。结果:AP大鼠肝脏组织中IκBαmRNA表达在各个时点均显著高于正常对照组(P<0.01,P<0.05);AP+QYT组显著低于AP+NS组(P<0.05)。与IκBα的mRNA表达相一致,肝脏和胰腺组织中IκBα蛋白表达(无论其磷酸化形式和非磷酸化形式)在AP大鼠均高于正常对照组(P<0.05);AP+NS组IκBα蛋白磷酸化形式表达在观测时间内增高;QYT可抑制该形式的表达(P<0.05)。AP大鼠血清LTC4浓度明显高于正常对照组,呈时间依赖性;AP+QYT组血清LTC4浓度明显低于AP组(P<0.05)。病理学检查见AP大鼠胰腺组织水肿、出血、肺间质水肿、出血,炎症细胞大量浸润,随AP的病程而加重;QYT治疗组的病理变化较轻。结论:QYT可通过抑制IκBα的磷酸化等机制减轻AP时局部和全身的炎症反应。展开更多
文摘The aim of our study was to gain insight into the molecular and cellular mechanisms of post-angioplasty restenosis using balloon catheter-induced injury model in the rat carotid artery. SD rats were subjected balloon catheterization at one side carotid artery as study group and another side as control group. Six rats were killed on the 6 h, and 3rd, 7th, 14th, 28th day after balloon-induced injury respectively. The intimal thickness and the expression of NF-κB and I-κB were detected by HE-staining, gel electrophoretic mobility shift assay （EMSA） and Western-blot methods. The results showed that： （1） The thickening of intima was observed on the 3rd day after balloon-induced injury, and it became more significant on the 7th, 14th and 28th day. The area ratio of intima/media was increased significantly （P〈0.05）; （2） The expression of NF-κB was not detectable in the control group, however, in study group, the expression of NF-κB was detected on the 6th h after balloon-induced injury, reached the peak on the 14th day, and on 28th day, strong expression of NF-κB was observed; （3） The expression of I-κB protein was reduced after balloon-induced injury, and there were significant differences between the study group and the control group （P〈0.05）. It was concluded that the alteration of NF-κB/I-κB system might play an important role in aberrant proliferation within the intima and vascular remodeling following vascular injury. To block NF-κB activation and its role in arterial restenosis initiation may potentially provide a novel therapeutic tool for the treatment and prevention of arterial restenosis.
文摘目的:研究核因子κB抑制蛋白(IκBα)在急性胰腺炎(AP)大鼠胰腺和肝脏组织中的表达及中药新清胰汤Ⅱ号[Q ing Y i TangⅡ(QYT)]的影响。方法:70只SD大鼠随机被分为正常对照组(n=10)、AP+QYT组(n=30)、AP+生理盐水(NS)组(n=30)。经胰胆管逆行注射4%去氧胆酸钠复制AP模型;给予QYT(AP+QYT组)或NS(AP+NS组)灌胃,每5 h重复1次。造模后1 h、4 h和10 h分批处死动物。荧光定量RT-PCR、W estern b lot-ting分别检测胰腺和肝脏组织IκBα在mRNA水平和蛋白水平的表达,后者包括磷酸化形式和非磷酸化形式;ELISA法检测血清白三烯C4(LTC4)浓度;HE染色观察胰腺和肺组织病理学变化。结果:AP大鼠肝脏组织中IκBαmRNA表达在各个时点均显著高于正常对照组(P<0.01,P<0.05);AP+QYT组显著低于AP+NS组(P<0.05)。与IκBα的mRNA表达相一致,肝脏和胰腺组织中IκBα蛋白表达(无论其磷酸化形式和非磷酸化形式)在AP大鼠均高于正常对照组(P<0.05);AP+NS组IκBα蛋白磷酸化形式表达在观测时间内增高;QYT可抑制该形式的表达(P<0.05)。AP大鼠血清LTC4浓度明显高于正常对照组,呈时间依赖性;AP+QYT组血清LTC4浓度明显低于AP组(P<0.05)。病理学检查见AP大鼠胰腺组织水肿、出血、肺间质水肿、出血,炎症细胞大量浸润,随AP的病程而加重;QYT治疗组的病理变化较轻。结论:QYT可通过抑制IκBα的磷酸化等机制减轻AP时局部和全身的炎症反应。
