目的探讨紫绀型先心病患儿右心室心肌组织中细胞信号抑制因子3(suppressor of cell signaling 3,SOCS3)基因启动子甲基化水平及其可能机制。方法选取先心病患儿34例,其中紫绀组18例,非紫绀组16例。取手术中切除的右心室流出道心肌组织...目的探讨紫绀型先心病患儿右心室心肌组织中细胞信号抑制因子3(suppressor of cell signaling 3,SOCS3)基因启动子甲基化水平及其可能机制。方法选取先心病患儿34例,其中紫绀组18例,非紫绀组16例。取手术中切除的右心室流出道心肌组织作为标本,采用甲基化特异性PCR(methylation specific PCR,MSP)及重亚硫酸盐测序(bisulfite sequencing PCR,BSP)检测心肌细胞中SOCS3启动子CpG岛甲基化程度。Western blot检测DNA甲基化转移酶3A(DNA methyltransferase,DNMT3A)、DNA甲基化转移酶3B(DNMT3B)蛋白在心肌细胞中的表达情况。结果与非紫绀组相比,紫绀组SOCS3启动子CpG岛甲基化程度较高,DNMT3A蛋白较高[(0.407±0.469)vs(0.160±0.034),P<0.05],DNMT3B蛋白无明显差异[(0.054±0.012)vs(0.052±0.093),P>0.05]。结论紫绀型先心病患儿心肌组织中,SOCS3启动子CpG岛呈高甲基化。高表达的DNMT3A蛋白很可能参与了SOCS3启动子CpG岛高甲基化。高甲基化的SOCS3启动子CpG岛,可能不是调控慢性缺氧适应心肌中SOCS3转录的主要因素。高表达的SOCS3启动子CpG岛以及高表达的DNA甲基化转移酶3A蛋白可能是心肌慢性缺氧适应的一种体现。展开更多
在免疫和炎症反应中,IL-6是多效性的细胞因子,它通过激Janus激酶(Janus kinase,JAK)/信号转录与激活因子3(signal transducer and activator of transcription 3,STAT3)/细胞因子信号传导抑制因子3(suppressor of cytokine signaling3,S...在免疫和炎症反应中,IL-6是多效性的细胞因子,它通过激Janus激酶(Janus kinase,JAK)/信号转录与激活因子3(signal transducer and activator of transcription 3,STAT3)/细胞因子信号传导抑制因子3(suppressor of cytokine signaling3,SOCS3)起重要作用.而且,IL-6介导的JAK/STAT3/SOCS3信号通路的失调和炎症性肠病(inflammatory bowel disease,IBD)的形成密切相关.由此,IL-6/JAK/STAT3/SOCS3信号通路的调节受到广泛研究并用于寻找IBD的新的治疗方法.该文介绍IBD中IL-6/JAK/STAT3/SOCS3通路的作用机制和作用,描述目前的治疗方案并研究治疗IBD的潜在的治疗方案.展开更多
目的通过对细胞因子信号转导抑制因子-3(suppressor of cytokine siganaling-3,SOCS-3)基因在结肠癌和癌旁组织中的表达及其启动子甲基化状态的测定,探讨其与结肠癌发生、发展和转移等的关系。方法收集40例结肠癌患者的肿瘤标本,20例癌...目的通过对细胞因子信号转导抑制因子-3(suppressor of cytokine siganaling-3,SOCS-3)基因在结肠癌和癌旁组织中的表达及其启动子甲基化状态的测定,探讨其与结肠癌发生、发展和转移等的关系。方法收集40例结肠癌患者的肿瘤标本,20例癌旁组织以及10例正常结肠组织,运用甲基化特异性PCR测定SOCS-3基因CpG岛甲基化状态.同时运用实时定量PCR分析SOCS-3基因在结肠癌组织中的表达水平。结果 40例结肠癌组织中有34例(85%)存在SOCS-3基因CpG岛的异常甲基化,癌旁组织中为2例(10%),而正常结肠组织中没有检测到SOCS-3基因呈CpG岛甲基化;结肠癌组织中SOCS-3基因CpG岛甲基化组与无甲基化组相比,其SOCS-3基因的相对表达量明显减少(P<0.05),表明SOCS-3基因CpG岛甲基化可导致SOCS-3基因表达降低。与患者临床资料结合分析,发现SOCS-3基因CpG岛甲基化与性别、年龄无关(P>0.05),而与肿瘤病理分级和TNM分期有关(P<0.05)。结论结肠癌中存在SOCS-3基因CpG岛异常甲基化,且因CpG岛的甲基化导致其基因表达降低。SOCS-3基因CpG岛甲基化可能参与了结肠癌的发生、发展和转移。展开更多
The expression level of suppressor of cytokine signaling-3(SOCS-3) in human renal carcinoma and its methylation state were investigated. Reverse transcription-polymerase chain reaction(RT-PCR), immuocytochemistry,...The expression level of suppressor of cytokine signaling-3(SOCS-3) in human renal carcinoma and its methylation state were investigated. Reverse transcription-polymerase chain reaction(RT-PCR), immuocytochemistry, immunohistochemistry and Western blot were used to detect the expression level of SOCS-3, and the methylation of SOCS gene was investigated by methylation specific PCR in the tissues of 15 cases of renal carcinoma. Compared to those of the normal renal cell line and specimens , the expression level of SOCS-3 in renal carcinoma was significantly lower or can’t be detected(P0.01). And the methylation of SOCS-3 gene in the tissue of renal carcinoma was significantly higher. The expression of SOCS-3 gene is significantly lower in renal carcinoma and the high methylation of the promoter island of SOCS-3 gene is associated with the lower expression of SOCS-3 gene. It may be one of main mechanisms for the development and progress of renal carcinoma.展开更多
目的观察血管软化丸对miRNA-155(miR-155)及细胞因子信号转导抑制剂l(suppressor of cytokine signaling 1,SOCS1)-磷酸化转录激活子3(phosphorylated signal transducer and activator of transcription 3,p-STAT3)-程序性细胞凋亡因子...目的观察血管软化丸对miRNA-155(miR-155)及细胞因子信号转导抑制剂l(suppressor of cytokine signaling 1,SOCS1)-磷酸化转录激活子3(phosphorylated signal transducer and activator of transcription 3,p-STAT3)-程序性细胞凋亡因子4(programmed cell death 4,PDCD4)信号通路和下游炎症因子的影响。方法体内实验中,将ApoE-/-小鼠分为模型组,miR-155抑制剂组,miR-155模拟物组,血管软化丸高、低剂量组;干预8周后观察小鼠主动脉病理变化,RT-PCR法检测小鼠主动脉miR-155、SOCS1、p-STAT3、PDCD4 mRNA表达水平,ELISA法检测小鼠血清肿瘤坏死因子-α(tumor necrosis factor alpha,TNF-α)、白细胞介素-6(interleukin-6,IL-6)、干扰素-γ(interferon gamma,IFN-γ)水平。体外实验中,将RAW264.7细胞随机分为对照组(空白血清)、miR-155抑制剂组、miR-155模拟物组、血管软化丸含药血清组;经药物血清干预后,RT-PCR法检测细胞miR-155、SOCS1、p-STAT3、PDCD4 mRNA表达水平。结果体内实验显示,miR-155模拟物组,血管软化丸高、低剂量组小鼠主动脉粥样硬化病变程度较模型组明显减轻;与模型组相比,miR-155模拟物组,血管软化丸高、低剂量组主动脉miR-155、SOCS1 mRNA表达水平明显升高(P<0.05),p-STAT3、PDCD4 mRNA表达水平明显降低(P<0.05),血清TNF-α、IL-6、IFN-γ水平较模型组明显降低(P<0.05)。体外实验显示,与对照组比较,miR-155模拟物组、血管软化丸含药血清组RAW264.7细胞miR-155、SOCS1 mRNA表达水平明显升高(P<0.05),p-STAT3和PDCD4 mRNA表达水平明显降低(P<0.05)。结论血管软化丸抗动脉粥样硬化的机制可能是通过miR-155调控SOCS1/STAT3/PDCD4信号通路影响炎症因子水平。展开更多
文摘在免疫和炎症反应中,IL-6是多效性的细胞因子,它通过激Janus激酶(Janus kinase,JAK)/信号转录与激活因子3(signal transducer and activator of transcription 3,STAT3)/细胞因子信号传导抑制因子3(suppressor of cytokine signaling3,SOCS3)起重要作用.而且,IL-6介导的JAK/STAT3/SOCS3信号通路的失调和炎症性肠病(inflammatory bowel disease,IBD)的形成密切相关.由此,IL-6/JAK/STAT3/SOCS3信号通路的调节受到广泛研究并用于寻找IBD的新的治疗方法.该文介绍IBD中IL-6/JAK/STAT3/SOCS3通路的作用机制和作用,描述目前的治疗方案并研究治疗IBD的潜在的治疗方案.
文摘目的通过对细胞因子信号转导抑制因子-3(suppressor of cytokine siganaling-3,SOCS-3)基因在结肠癌和癌旁组织中的表达及其启动子甲基化状态的测定,探讨其与结肠癌发生、发展和转移等的关系。方法收集40例结肠癌患者的肿瘤标本,20例癌旁组织以及10例正常结肠组织,运用甲基化特异性PCR测定SOCS-3基因CpG岛甲基化状态.同时运用实时定量PCR分析SOCS-3基因在结肠癌组织中的表达水平。结果 40例结肠癌组织中有34例(85%)存在SOCS-3基因CpG岛的异常甲基化,癌旁组织中为2例(10%),而正常结肠组织中没有检测到SOCS-3基因呈CpG岛甲基化;结肠癌组织中SOCS-3基因CpG岛甲基化组与无甲基化组相比,其SOCS-3基因的相对表达量明显减少(P<0.05),表明SOCS-3基因CpG岛甲基化可导致SOCS-3基因表达降低。与患者临床资料结合分析,发现SOCS-3基因CpG岛甲基化与性别、年龄无关(P>0.05),而与肿瘤病理分级和TNM分期有关(P<0.05)。结论结肠癌中存在SOCS-3基因CpG岛异常甲基化,且因CpG岛的甲基化导致其基因表达降低。SOCS-3基因CpG岛甲基化可能参与了结肠癌的发生、发展和转移。
基金Supported by the Thirty-ninth Postdoctoral Science Foundation of China(No.20060390907)
文摘The expression level of suppressor of cytokine signaling-3(SOCS-3) in human renal carcinoma and its methylation state were investigated. Reverse transcription-polymerase chain reaction(RT-PCR), immuocytochemistry, immunohistochemistry and Western blot were used to detect the expression level of SOCS-3, and the methylation of SOCS gene was investigated by methylation specific PCR in the tissues of 15 cases of renal carcinoma. Compared to those of the normal renal cell line and specimens , the expression level of SOCS-3 in renal carcinoma was significantly lower or can’t be detected(P0.01). And the methylation of SOCS-3 gene in the tissue of renal carcinoma was significantly higher. The expression of SOCS-3 gene is significantly lower in renal carcinoma and the high methylation of the promoter island of SOCS-3 gene is associated with the lower expression of SOCS-3 gene. It may be one of main mechanisms for the development and progress of renal carcinoma.
文摘目的观察血管软化丸对miRNA-155(miR-155)及细胞因子信号转导抑制剂l(suppressor of cytokine signaling 1,SOCS1)-磷酸化转录激活子3(phosphorylated signal transducer and activator of transcription 3,p-STAT3)-程序性细胞凋亡因子4(programmed cell death 4,PDCD4)信号通路和下游炎症因子的影响。方法体内实验中,将ApoE-/-小鼠分为模型组,miR-155抑制剂组,miR-155模拟物组,血管软化丸高、低剂量组;干预8周后观察小鼠主动脉病理变化,RT-PCR法检测小鼠主动脉miR-155、SOCS1、p-STAT3、PDCD4 mRNA表达水平,ELISA法检测小鼠血清肿瘤坏死因子-α(tumor necrosis factor alpha,TNF-α)、白细胞介素-6(interleukin-6,IL-6)、干扰素-γ(interferon gamma,IFN-γ)水平。体外实验中,将RAW264.7细胞随机分为对照组(空白血清)、miR-155抑制剂组、miR-155模拟物组、血管软化丸含药血清组;经药物血清干预后,RT-PCR法检测细胞miR-155、SOCS1、p-STAT3、PDCD4 mRNA表达水平。结果体内实验显示,miR-155模拟物组,血管软化丸高、低剂量组小鼠主动脉粥样硬化病变程度较模型组明显减轻;与模型组相比,miR-155模拟物组,血管软化丸高、低剂量组主动脉miR-155、SOCS1 mRNA表达水平明显升高(P<0.05),p-STAT3、PDCD4 mRNA表达水平明显降低(P<0.05),血清TNF-α、IL-6、IFN-γ水平较模型组明显降低(P<0.05)。体外实验显示,与对照组比较,miR-155模拟物组、血管软化丸含药血清组RAW264.7细胞miR-155、SOCS1 mRNA表达水平明显升高(P<0.05),p-STAT3和PDCD4 mRNA表达水平明显降低(P<0.05)。结论血管软化丸抗动脉粥样硬化的机制可能是通过miR-155调控SOCS1/STAT3/PDCD4信号通路影响炎症因子水平。