Objective The aim of the study was to investigate the expression of proteins in colonic tissues of mice with ulcerative colitis(UC) by using isobaric tags for relative and absolute quantitation(iTRAQ), probe into the ...Objective The aim of the study was to investigate the expression of proteins in colonic tissues of mice with ulcerative colitis(UC) by using isobaric tags for relative and absolute quantitation(iTRAQ), probe into the pathogenesis of UC, and find potential biomarkers of UC. Methods Forty C57 mice were randomly divided into the control and model groups(20 mice in each group). The mice in the model group were administered dextran sulphate sodium(DSS) for 7 consecutive days ad libitum to induce acute colitis, and the colon tissue was extracted on the 8 th day after the successful establishment of the UC model. Proteins were identified by the i TRAQ and tandem mass spectrometry techniques,and the identified proteins were analyzed by bioinformatics. Results A total of 4019 proteins were identified among the two groups. Among them, 317 significant differentially expressed proteins(DEPs) were detected according to the screening criteria for selecting DEPs, i.e. fold change ratios ≥ 1.5 or ≤ 0.67 and P-values < 0.05, of which 156 were upregulated and 161 were downregulated. In the Gene Ontology(GO) analysis, the DEPs were classified into 48 functional categories, which contained biological process, cellular component, and molecular function. Based on the 317 DEPs, the KEGG pathway analysis identified 160 vital pathways.Conclusion DEPs in colonic tissues of mice with UC were screened using the iTRAQ technique, which laid a foundation for further studies regarding the pathogenesis of UC.展开更多
目的探讨美沙拉嗪对溃疡性结肠炎(ulcerative colitis,UC)大鼠结肠组织TLR4表达的影响。方法选取30只SD大鼠随机分为正常对照组、UC组及治疗组。后两组均采用三硝基苯磺酸(TNBS)诱导制备UC大鼠模型。成功建模2 d后,治疗组采用美沙拉嗪+...目的探讨美沙拉嗪对溃疡性结肠炎(ulcerative colitis,UC)大鼠结肠组织TLR4表达的影响。方法选取30只SD大鼠随机分为正常对照组、UC组及治疗组。后两组均采用三硝基苯磺酸(TNBS)诱导制备UC大鼠模型。成功建模2 d后,治疗组采用美沙拉嗪+蒸馏水混悬液3 ml灌胃,正常对照组、UC组仅用单纯蒸馏水3 ml灌胃,连续灌注14 d后,处死三组大鼠,对三组大鼠的疾病活动指数、肠黏膜及组织学损伤进行评估,RT-PCR反应测定结肠组织TLR4 m RNA的表达;蛋白质印迹法测定TLR4蛋白的表达。结果 UC组大鼠疾病活动指数、肠黏膜及组织学损伤评分均显著高于正常对照组和治疗组(P<0.05)。UC组及治疗组大鼠结肠组织TLR4 m RNA及蛋白表达水平显著高于正常对照组(P<0.05)。与UC组比较,治疗组大鼠结肠组织TLR4 m RNA及蛋白表达均显著降低,差异有统计学意义(P<0.05)。结论美沙拉嗪对UC大鼠结肠组织TLR4表达有抑制作用,可有效减少肠组织TLR4 m RNA的表达,缓解UC大鼠结肠组织损伤,有效保护UC大鼠结肠组织黏膜。展开更多
目的拟在浙江省汉族人群中探讨结肠组织中诱骗受体和护骨素基因多态性及其结肠组织表达水平与UC的关系。方法收集56例UC患者和62例性别、年龄相匹配的良性结肠息肉患者作为对照组,采集空腹外周静脉血和结肠组织标本。采用SNaPshot技术检...目的拟在浙江省汉族人群中探讨结肠组织中诱骗受体和护骨素基因多态性及其结肠组织表达水平与UC的关系。方法收集56例UC患者和62例性别、年龄相匹配的良性结肠息肉患者作为对照组,采集空腹外周静脉血和结肠组织标本。采用SNaPshot技术检测DcR1(rs12549481)、DcR2(rs1133782)及OPG(rs3102735)的基因多态性。采用反转录实时定量PCR(RT-qPCR)法和免疫组织化学法检测结肠组织中DcR1、DcR2、OPG mRNA及蛋白表达水平。在UC组和对照组之间,以及携带不同基因型的UC患者之间比较结肠组织中DcR1、DcR2、OPG mRNA和蛋白表达水平差异。结果UC组中突变基因型(GA+AA)及突变等位基因(A)频率均显著高于正常对照组(15.18%vs 6.45%,OR=2.595,95%CI:1.073~6.274,P=0.030;28.57%vs 12.90%,OR=2.700,95%CI:1.053~6.926,P=0.035)。UC患者结肠组织中DcR2mRNA和蛋白表达水平均显著低于对照组(4.49±2.29 vs 9.49±4.06,t=8.134,P<0.01;0.180±0.052 vs 0.273±0.069,t=8.322,P<0.01)。携带DcR2(rs1133782)突变基因型(GA+AA)的患者结肠组织中DcR2的mRNA和蛋白表达水平显著高于携带野生纯合子(GG)基因型者(3.64±1.63 vs 6.62±2.35,t=5.43,P<0.01;0.129±0.028 vs 0.198±0.047,t=7.147,P<0.01)。然而,UC组和对照组之间,以及携带DcR1、OPG不同基因型的UC患者之间,DcR1和OPG mRNA和蛋白表达水平差异均无统计学意义(P均>0.05)。结论DcR2(rs1133782)基因突变可能降低UC的发病风险,其机制可能通过降低DcR2 mRNA和蛋白表达水平发挥作用,DcR1(rs12549481)和OPG(rs3102735)基因多态性及其结肠组织表达水平与UC的发病风险无显著关联。展开更多
基金Supported by a grant from the Natural Science Foundation of Hubei Province(No.2011CHB025)
文摘Objective The aim of the study was to investigate the expression of proteins in colonic tissues of mice with ulcerative colitis(UC) by using isobaric tags for relative and absolute quantitation(iTRAQ), probe into the pathogenesis of UC, and find potential biomarkers of UC. Methods Forty C57 mice were randomly divided into the control and model groups(20 mice in each group). The mice in the model group were administered dextran sulphate sodium(DSS) for 7 consecutive days ad libitum to induce acute colitis, and the colon tissue was extracted on the 8 th day after the successful establishment of the UC model. Proteins were identified by the i TRAQ and tandem mass spectrometry techniques,and the identified proteins were analyzed by bioinformatics. Results A total of 4019 proteins were identified among the two groups. Among them, 317 significant differentially expressed proteins(DEPs) were detected according to the screening criteria for selecting DEPs, i.e. fold change ratios ≥ 1.5 or ≤ 0.67 and P-values < 0.05, of which 156 were upregulated and 161 were downregulated. In the Gene Ontology(GO) analysis, the DEPs were classified into 48 functional categories, which contained biological process, cellular component, and molecular function. Based on the 317 DEPs, the KEGG pathway analysis identified 160 vital pathways.Conclusion DEPs in colonic tissues of mice with UC were screened using the iTRAQ technique, which laid a foundation for further studies regarding the pathogenesis of UC.
文摘目的探讨美沙拉嗪对溃疡性结肠炎(ulcerative colitis,UC)大鼠结肠组织TLR4表达的影响。方法选取30只SD大鼠随机分为正常对照组、UC组及治疗组。后两组均采用三硝基苯磺酸(TNBS)诱导制备UC大鼠模型。成功建模2 d后,治疗组采用美沙拉嗪+蒸馏水混悬液3 ml灌胃,正常对照组、UC组仅用单纯蒸馏水3 ml灌胃,连续灌注14 d后,处死三组大鼠,对三组大鼠的疾病活动指数、肠黏膜及组织学损伤进行评估,RT-PCR反应测定结肠组织TLR4 m RNA的表达;蛋白质印迹法测定TLR4蛋白的表达。结果 UC组大鼠疾病活动指数、肠黏膜及组织学损伤评分均显著高于正常对照组和治疗组(P<0.05)。UC组及治疗组大鼠结肠组织TLR4 m RNA及蛋白表达水平显著高于正常对照组(P<0.05)。与UC组比较,治疗组大鼠结肠组织TLR4 m RNA及蛋白表达均显著降低,差异有统计学意义(P<0.05)。结论美沙拉嗪对UC大鼠结肠组织TLR4表达有抑制作用,可有效减少肠组织TLR4 m RNA的表达,缓解UC大鼠结肠组织损伤,有效保护UC大鼠结肠组织黏膜。
文摘目的拟在浙江省汉族人群中探讨结肠组织中诱骗受体和护骨素基因多态性及其结肠组织表达水平与UC的关系。方法收集56例UC患者和62例性别、年龄相匹配的良性结肠息肉患者作为对照组,采集空腹外周静脉血和结肠组织标本。采用SNaPshot技术检测DcR1(rs12549481)、DcR2(rs1133782)及OPG(rs3102735)的基因多态性。采用反转录实时定量PCR(RT-qPCR)法和免疫组织化学法检测结肠组织中DcR1、DcR2、OPG mRNA及蛋白表达水平。在UC组和对照组之间,以及携带不同基因型的UC患者之间比较结肠组织中DcR1、DcR2、OPG mRNA和蛋白表达水平差异。结果UC组中突变基因型(GA+AA)及突变等位基因(A)频率均显著高于正常对照组(15.18%vs 6.45%,OR=2.595,95%CI:1.073~6.274,P=0.030;28.57%vs 12.90%,OR=2.700,95%CI:1.053~6.926,P=0.035)。UC患者结肠组织中DcR2mRNA和蛋白表达水平均显著低于对照组(4.49±2.29 vs 9.49±4.06,t=8.134,P<0.01;0.180±0.052 vs 0.273±0.069,t=8.322,P<0.01)。携带DcR2(rs1133782)突变基因型(GA+AA)的患者结肠组织中DcR2的mRNA和蛋白表达水平显著高于携带野生纯合子(GG)基因型者(3.64±1.63 vs 6.62±2.35,t=5.43,P<0.01;0.129±0.028 vs 0.198±0.047,t=7.147,P<0.01)。然而,UC组和对照组之间,以及携带DcR1、OPG不同基因型的UC患者之间,DcR1和OPG mRNA和蛋白表达水平差异均无统计学意义(P均>0.05)。结论DcR2(rs1133782)基因突变可能降低UC的发病风险,其机制可能通过降低DcR2 mRNA和蛋白表达水平发挥作用,DcR1(rs12549481)和OPG(rs3102735)基因多态性及其结肠组织表达水平与UC的发病风险无显著关联。
