目的:克隆和表达中国人金属基质蛋白酶组织抑制因子-1(tissue inhibitor of metalloproteinases-1;TIMP-1)基因,获得具有抗原性的人TIMP-1蛋白。方法:用RT-nest-PCR扩增TIMP-1编码区基因片段,用基因重组技术构建含该片段的重组质粒并进...目的:克隆和表达中国人金属基质蛋白酶组织抑制因子-1(tissue inhibitor of metalloproteinases-1;TIMP-1)基因,获得具有抗原性的人TIMP-1蛋白。方法:用RT-nest-PCR扩增TIMP-1编码区基因片段,用基因重组技术构建含该片段的重组质粒并进行序列分析。在大肠杆菌E.coli中表达融合蛋白MBP-TIMP-1,用SDS-PAGE和Western-blot对重组蛋白进行分析鉴定,并用亲和层析试剂盒纯化融合蛋白MBP-TIMP-1。结果:经核苷酸序列分析表明,本研究克隆的中国人TIMP-1为624bp,与报道的国外TIMP-1基因序列同源。经SDS-PAGE和Western blot表明,表达的融合蛋白NBP-TIMP-1分子质量为66Ku,具有TIMP-1的抗原性,并可进行亲和层析纯化。结论:克隆了中国人TIMP-1基因,表达和纯化了具有免疫原性的融合蛋白MBP-TIMP-1,他将对肝纤维化的诊断有一定作用。展开更多
AIM: Overexpression of mucosal metalloproteinases (MMP)has been demonstrated recently in inflammatory boweldisease. Their activity can be counterbalanced by the tissueinhibitor of metalloproteinases (TIMP). The aim of...AIM: Overexpression of mucosal metalloproteinases (MMP)has been demonstrated recently in inflammatory boweldisease. Their activity can be counterbalanced by the tissueinhibitor of metalloproteinases (TIMP). The aim of this studywas to evaluate the effect of ulcerative colitis (UC) on MMP-1 and TTMP-1 plasma concentrations, as two possiblebiomarkers of the disease activity.METHODS: MMP-1 and TIMP-1 plasma concentrations weremeasured with an enzyme immunoassay in 16 patients withendoscopically confirmed active UC.RESULTS: Plasma concentrations of both MMP-11 (13.7±0.2ng/ml) and TIMP-L (799±140 ng/ml) were significantlyelevated in UC patients in comparison to healthy controls(11.9±0.9 ng/ml and 220±7 ng/ml respectively). There wasno correlation between TIMP-1 and MMP-1 concentrations(r=-0.02). TIMP-1 levels revealed significant positivecorrelations with scored endoscopic degree of mucosai injury,disease activity index and clinical activity index values aswell as C-reactive protein concentration. There was nocorrelation between MMP-1 and laboratory, clinical orendoscopic indices of the disease activity.CONCLUSION: These results confirm the role of both MMP-1 and TIMP-1 in the pathogenesis of ulcerative colitis.However only TIMP-1 can be useful as a biomarker of thedisease activity, demonstrating association with clinical andendoscopic pictures.展开更多
文摘目的:克隆和表达中国人金属基质蛋白酶组织抑制因子-1(tissue inhibitor of metalloproteinases-1;TIMP-1)基因,获得具有抗原性的人TIMP-1蛋白。方法:用RT-nest-PCR扩增TIMP-1编码区基因片段,用基因重组技术构建含该片段的重组质粒并进行序列分析。在大肠杆菌E.coli中表达融合蛋白MBP-TIMP-1,用SDS-PAGE和Western-blot对重组蛋白进行分析鉴定,并用亲和层析试剂盒纯化融合蛋白MBP-TIMP-1。结果:经核苷酸序列分析表明,本研究克隆的中国人TIMP-1为624bp,与报道的国外TIMP-1基因序列同源。经SDS-PAGE和Western blot表明,表达的融合蛋白NBP-TIMP-1分子质量为66Ku,具有TIMP-1的抗原性,并可进行亲和层析纯化。结论:克隆了中国人TIMP-1基因,表达和纯化了具有免疫原性的融合蛋白MBP-TIMP-1,他将对肝纤维化的诊断有一定作用。
文摘AIM: Overexpression of mucosal metalloproteinases (MMP)has been demonstrated recently in inflammatory boweldisease. Their activity can be counterbalanced by the tissueinhibitor of metalloproteinases (TIMP). The aim of this studywas to evaluate the effect of ulcerative colitis (UC) on MMP-1 and TTMP-1 plasma concentrations, as two possiblebiomarkers of the disease activity.METHODS: MMP-1 and TIMP-1 plasma concentrations weremeasured with an enzyme immunoassay in 16 patients withendoscopically confirmed active UC.RESULTS: Plasma concentrations of both MMP-11 (13.7±0.2ng/ml) and TIMP-L (799±140 ng/ml) were significantlyelevated in UC patients in comparison to healthy controls(11.9±0.9 ng/ml and 220±7 ng/ml respectively). There wasno correlation between TIMP-1 and MMP-1 concentrations(r=-0.02). TIMP-1 levels revealed significant positivecorrelations with scored endoscopic degree of mucosai injury,disease activity index and clinical activity index values aswell as C-reactive protein concentration. There was nocorrelation between MMP-1 and laboratory, clinical orendoscopic indices of the disease activity.CONCLUSION: These results confirm the role of both MMP-1 and TIMP-1 in the pathogenesis of ulcerative colitis.However only TIMP-1 can be useful as a biomarker of thedisease activity, demonstrating association with clinical andendoscopic pictures.
