目的探讨血清C反应蛋白(CRP)与冠状动脉支架内再狭窄(ISR)发生的关系,旨在提高ISR患者临床检出率。方法选择2010年1月~2018年12月首都医科大学附属北京安贞医院急诊危重症中心收治的冠心病首次PCI患者3100例,PCI术后1年复查冠状动脉造...目的探讨血清C反应蛋白(CRP)与冠状动脉支架内再狭窄(ISR)发生的关系,旨在提高ISR患者临床检出率。方法选择2010年1月~2018年12月首都医科大学附属北京安贞医院急诊危重症中心收治的冠心病首次PCI患者3100例,PCI术后1年复查冠状动脉造影发现ISR患者430例(ISR组),未发现ISR患者2670例(无ISR组),比较2组一般临床资料及实验室化验指标,分析ISR发生的相关因素及与CRP的关系。结果ISR组出院时及随访时CRP水平明显高于无ISR组[17.1(1.1,26.9)mg/L vs 12.9(0.9,23.5)mg/L,P=0.034;15.2(0.7,23.9)mg/L vs 3.9(0.2,7.9)mg/L,P=0.001]。逐步多元回归分析显示,ST段抬高型心肌梗死、出院时及随访时血清CRP水平是预测冠心病支架置入术后ISR的危险因素(P<0.05,P<0.01)。随访时CRP的ROC曲线下面积为0.861(95%CI:0.815~0.907,P<0.01),截点值12.23 mg/L,敏感性80.5%,特异性77.9%;出院时CRP的ROC曲线下面积为0.637(95%CI:0.566~0.709,P<0.01)。结论冠状动脉ISR发生与出院时及随访时CRP水平密切相关,应用随访时CRP水平对ISR进行预测具有较高的敏感性和特异性。展开更多
Src is a non-receptor protein tyrosine kinase activated by a number of extracellular signal moleculars. It is recruited to peripheral sites through myristoylation and the SH3 domain. Src initiates intracellular signal...Src is a non-receptor protein tyrosine kinase activated by a number of extracellular signal moleculars. It is recruited to peripheral sites through myristoylation and the SH3 domain. Src initiates intracellular signal trandsduction pathways that influence cell adhesion, migration, growth, differentiation and survival though catalytic domain. Src is normally maintained in an inactive conformation because of carboxy terminal Src kinase, but can be activated transiently during cellular events such as mitosis or constitutively by abnormal events such as mutation and some cancers. In additions, c-Src protein is found to be highly activated and the Src gene is frequently over-expressed in many cancers. These findings suggest that the relationship between c-Src activation/over-expression and cancer progression appears to be significant.展开更多
目的:研究PICK1(protein interacting with C kinase 1)蛋白PDZ结构域内83位点赖氨酸(K83)对PICK1和AMPA受体GluR2亚单位相互作用的影响。方法:利用计算机对PICK1 PDZ结构域和GluR2 C末端4个氨基酸残基进行对接模拟,然后将K83进行虚拟...目的:研究PICK1(protein interacting with C kinase 1)蛋白PDZ结构域内83位点赖氨酸(K83)对PICK1和AMPA受体GluR2亚单位相互作用的影响。方法:利用计算机对PICK1 PDZ结构域和GluR2 C末端4个氨基酸残基进行对接模拟,然后将K83进行虚拟点突变,计算并观察突变后结构和键能的改变。利用实验室已有的野生型全长PICK1 cDNA质粒为模板,构建点突变质粒,与野生型GluR2共转到HEK293T细胞,观察两者在细胞内定位和分布的改变。结果:当野生型PICK1与GluR2共转染时,HEK293T细胞有大量PICK1和GluR2共定位的集簇(cluster)。当我们把构建的PICK1突变体与GluR2共转染时,不同的突变体表现出不一样的改变。结论:改变K83位点的氨基酸结构,很可能会改变PICK1 PDZ结构域与GluR2 C末端结合所形成的疏水、氢键、静电相互作用,使得PDZ结构域与GluR2 C末端的结合能力发生不同程度的改变。展开更多
文摘目的探讨血清C反应蛋白(CRP)与冠状动脉支架内再狭窄(ISR)发生的关系,旨在提高ISR患者临床检出率。方法选择2010年1月~2018年12月首都医科大学附属北京安贞医院急诊危重症中心收治的冠心病首次PCI患者3100例,PCI术后1年复查冠状动脉造影发现ISR患者430例(ISR组),未发现ISR患者2670例(无ISR组),比较2组一般临床资料及实验室化验指标,分析ISR发生的相关因素及与CRP的关系。结果ISR组出院时及随访时CRP水平明显高于无ISR组[17.1(1.1,26.9)mg/L vs 12.9(0.9,23.5)mg/L,P=0.034;15.2(0.7,23.9)mg/L vs 3.9(0.2,7.9)mg/L,P=0.001]。逐步多元回归分析显示,ST段抬高型心肌梗死、出院时及随访时血清CRP水平是预测冠心病支架置入术后ISR的危险因素(P<0.05,P<0.01)。随访时CRP的ROC曲线下面积为0.861(95%CI:0.815~0.907,P<0.01),截点值12.23 mg/L,敏感性80.5%,特异性77.9%;出院时CRP的ROC曲线下面积为0.637(95%CI:0.566~0.709,P<0.01)。结论冠状动脉ISR发生与出院时及随访时CRP水平密切相关,应用随访时CRP水平对ISR进行预测具有较高的敏感性和特异性。
文摘Src is a non-receptor protein tyrosine kinase activated by a number of extracellular signal moleculars. It is recruited to peripheral sites through myristoylation and the SH3 domain. Src initiates intracellular signal trandsduction pathways that influence cell adhesion, migration, growth, differentiation and survival though catalytic domain. Src is normally maintained in an inactive conformation because of carboxy terminal Src kinase, but can be activated transiently during cellular events such as mitosis or constitutively by abnormal events such as mutation and some cancers. In additions, c-Src protein is found to be highly activated and the Src gene is frequently over-expressed in many cancers. These findings suggest that the relationship between c-Src activation/over-expression and cancer progression appears to be significant.
