Expression of matrix metalloproteinase-1 and tissue inhibitor of metalloproteinase-1 in ulcerative colitis

INTRODUCTION Ulcerative colitis (UC) is a chronic, non-specific inflammatory disease of the colonic mucosa with unknown etiology and pathogenesis. Pathologically, it is characterized by ulceration in the mucosal and submucosal areas, and degradation of ex…     

基质金属蛋白酶-9和金属蛋白酶组织抑制物-1在IgA肾病肾组织中的表达

目的 探讨基质金属蛋白酶－9（MMP－9）／金属蛋白酶组织抑制物－1（TIMP－1）系统在IgA肾病肾组织中的表达及其对IgA肾病的进展的影响。方法 采用免疫组织化学和原位杂交技术,分别在蛋白质和基因水平检测38例IgA肾病患者肾组织中的MMP－9和TIMP－1的变化。结果 MMP－9在正常肾脏肾小球的脏层上皮细胞和内皮细胞有少量表达,在肾小管上皮细胞和间质血管壁也有少量表达;在IgA肾病中,MMP－9在系膜增殖性肾小球和间质血管壁的表达均明显增多（P＜0．001）,而在硬化肾小球内的表达则明显减少,肾小管细胞的MMP－9表达无明显变化。TIMP－1在正常肾组织中不能检出,在IgA肾病患者具有系膜增殖性病变的肾小球中有微量表达,在增殖在很重但尚未完全硬化的肾小球内表达增多,在肾小管间质表达最为明显（P＜0．001）,其主要见于肾小管细胞、间质细胞和血管内皮细胞。肾组织中的TIMP－1表达与血清肌酐水平呈显著相关（P＜0．05）,与肾小管间质的纤维化和炎细胞浸润程度亦明显相关（P值均＜0．01）。肾小球中的MMP－9表达与尿蛋白无明显相关性,但与血清肌酐水平呈显著负相关（P＜0．05）。结论 MMP－9和TIMP－1的异常表达可能是影响IgA肾病进展的因素之一。     

基质金属蛋白酶—1,反义金属蛋白酶组织抑制因子—1表达质粒？…

目的 观察基质金属蛋白酶－１（ＭＭＰ－１）,反义金属蛋白酶组织抑制因子－１（ＴＩＭＰ－１）表达质粒对大鼠肝纤维经的影响。方法 运用重组ＤＮＡ技术,构建大鼠ＭＭＰ－１,反义ＴＩＭＰ－１,真核细胞表达质粒,经脂质包埋后,利用腹腔注射将其导入免疫性大鼠纤维化模型体内,观察其对大鼠肝纤维化的影响。结果 ＭＭＰ－１,反义ＴＩＭＰ－１表达质粒均可促进肝脏中Ⅰ,Ⅲ型胶原的降解（Ｐ〈０．０５－Ｐ〈０．０１）,且作     

MMP-9、TIMP-1在胰腺癌组织中的表达及临床意义

目的:探讨胰腺癌患者组织中MMP-9、TIMP-1的表达及其相互关系,分析其与临床及转移预后的关系.方法:免疫组织化学SP法检测63例胰腺癌、11例慢性胰腺炎和6例正常胰腺组织中MMP-9、TIMP-1的表达.结果:胰腺癌组织中MMP-9表达明显高于慢性胰腺炎和正常胰腺组织(58.7% vs 18.1%,0.0%;均P<0.05).TIMP-1在胰腺癌的表达低于正常胰腺组织(46.0% vs 100.0%,P<0.05).MMP-9和TIMP-1在胰腺癌组织中的表达与性别、年龄、组织学分级无关,而与患者的淋巴结转移、远处转移情况有关(P<0.05).结论:MMP-9、TIMP-1在胰腺癌组织中的表达变化可能与胰腺癌转移相关.     

基质金属蛋白酶-2及其抑制物在慢性肝炎和肝硬化肝组织中的表达

为进一步探讨基质金属蛋白酶-2（MMP-2）和基质金属蛋白酶-2组织抑制因子（TIMP-2）在肝纤维化发生，发展过程中的作用，用免疫组织化学方法检测慢性肝炎和肝硬化肝组织中MMP-2和TIMP-2的表达及分布状态，并作定位及半定量分析。     

Effect of Danshao Huaxian capsule on expression of matrix metalloproteinase-1 and tissue inhibitor of metalloproteinase-1 in fibrotic liver of rats

AIM: To investigate the effects of Danshao Huaxian (DSHX) capsules, a preparation of traditional Chinese medicine, on the expression of matrix metalloproteinase-1 (MMP-1), and tissue inhibitor of metalloproteinase-1 (TIMP-1) in the fibrous livers of rats. METHODS: Eighty male Wistar rats were randomly divided into normal control group (group A), CCl4-induced hepatic fibrosis group (group B), non-DSHX-treated group (group C), low dose-treated group (group D), and high dose-treated group (group E). Fibrous liver models in rats were induced by subcutaneous injection of CCl4, oral administration of alcohol and high-lipid/low-protein diet for 8 wk. After the models were established, the rats in groups D and E were orally given a low dose (0.5 g/kg) and a high dose (1.0 g/kg) of DSHX daily for 8 wk, respectively. Then, the liver indexes, serum hyaluronic acid (HA) and alanine aminotransferase (ALT) were examined. The degree of hepatic fibrosis was evaluated by optical microscopy. Hydroxyproline (Hyp) in the urine was determined, and the expression of MMP-1 and TIMP-1 was detected by immunohistochemical techniques. RESULTS: In groups D and E, the liver indexes, levels of serum HA and ALT reduced and development of hepatic fibrosis weakened significantly. The urinary Hyp and expression of MMP-1 in the liver tissues elevated, but the expression of TIMP-1 decreased obviously, as compared to groups B and C. CONCLUSION: DSHX enhances the expression of MMP-1 but decreases that of TIMP-1 in liver tissues of CCl4-induced hepatic fibrotic rats, which may result in its elevated activity that contributes to fighting against hepatic fibrosis.     

基质金属蛋白酶-9在急性胰腺炎相关性肺损伤中的表达

目的:探讨基质金属蛋白酶-9(MMP-9)在急性胰腺炎相关性肺损伤(APALI)中的表达及其临床意义。方法:SD大鼠腹腔注射L-精氨酸制备急性坏死性胰腺炎(ANP)模型。透射电镜下观察大鼠肺组织超微结构改变;采用免疫组化法分析MMP-9在大鼠肺脏、胰腺组织中的表达及定位。对ANP死亡患者尸检的肺脏和胰腺标本蜡块进行HE染色和免疫组化分析。结果:透射电镜观察ANP大鼠肺泡基底膜水肿、坏死、断裂,肺脏间质水肿、坏死、大量粒细胞浸润,毛细血管内皮水肿、坏死、断裂;免疫组化显示死亡大鼠肺间质、基底膜及间质浸润的炎症细胞和胰腺间质、基底膜MMP-9均表达阳性。ANP尸检标本胰腺和肺脏组织有明显的坏死和结构破坏,且MMP-9表达阳性。结论:MMP-9在ANP大鼠和死亡患者胰腺和肺脏组织表达均阳性,MMP-9可能在APALI的发病过程中起着重要作用。     

Time dependent alterations of serum matrix metalloproteinase-1 and metalloproteinase-1 tissue inhibitor after successful reperfusion of acute myocardial infarction.

OBJECTIVE: To test the hypothesis that changes in serum matrix metalloproteinase-1 (MMP-1) and tissue inhibitors of metalloproteinase-1 (TIMP-1) after acute myocardial infarction reflect extracellular matrix remodelling and the infarct healing process. PATIENTS: 13 consecutive patients with their first acute myocardial infarction who underwent successful reperfusion. METHODS: Blood was sampled on the day of admission, and on days 2, 3, 4, 5, 7, 14, and 28. Serum MMP-1 and TIMP-1 were measured by one step sandwich enzyme immunoassay. Left ventricular volume indices were determined by left ventriculography performed four weeks after the infarct. RESULTS: Serum concentrations of both MMP-1 and TIMP-1 changed over time. The average serum MMP-1 was more than 1 SD below the mean control values during the initial four days, increased thereafter, reaching a peak concentration around day 14, and then returned to the middle control range. Negative correlations with left ventricular end systolic volume index and positive correlations with left ventricular ejection fraction were obtained for serum MMP-1 on day 5, when it began to rise, and for the magnitude of rise in MMP-1 on day 5 compared to admission. Serum TIMP-1 at admission was more than 1 SD below the mean control value, and increased gradually thereafter, reaching a peak on around day 14. Negative correlations with left ventricular end systolic volume index and positive correlations with left ventricular ejection fraction were obtained for serum TIMP-1 on days 5 and 7, and for the magnitude of rise in TIMP-1 on days 5 and 7 compared to admission. CONCLUSIONS: Both MMP-1 and TIMP-1 showed significant time dependent alteration after acute myocardial infarction. Thus MMP-1 and TIMP-1 may provide useful information in evaluating the healing process as it affects left ventricular remodelling after acute myocardial infarction.     

Plasma matrix metalloproteinase-1 and tissue inhibitor of metalloproteinase-1 as biomarkers of ulcerative colitis activity

AIM: Overexpression of mucosal metalloproteinases (MMP) has been demonstrated recently in inflammatory bowel disease. Their activity can be counterbalanced by the tissue inhibitor of metalloproteinases (TIMP). The aim of this study was to evaluate the effect of ulcerative colitis (UC) on MMP-1 and TIMP-1 plasma concentrations, as two possible biomarkers of the disease activity. METHODS: MMP-1 and TIMP-1 plasma concentrations were measured with an enzyme immunoassay in 16 patients with endoscopically confirmed active UC. RESULTS: Plasma concentrations of both MMP-1 (13.7 +/- 0.2 ng/ml) and TIMP-1 (799 +/- 140 ng/ml) were significantly elevated in UC patients in comparison to healthy controls (11.9 +/- 0.9 ng/ml and 220 +/- 7 ng/ml respectively). There was no correlation between TIMP-1 and MMP-1 concentrations (r=-0.02). TIMP-1 levels revealed significant positive correlations with scored endoscopic degree of mucosal injury, disease activity index and clinical activity index values as well as C-reactive protein concentration. There was no correlation between MMP-1 and laboratory, clinical or endoscopic 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 the disease activity, demonstrating association with clinical and endoscopic pictures.     

MMP-1、TIMP-1与实验性肝纤维化形成过程中基质转换的关系及抗纤软肝颗粒的干预作用

目的：动态观察肝纤维化形成过程中肝组织MMP-1、TIMP-1 mRNA及Ⅰ、Ⅲ型胶原的表达，以探讨MMP-1、TIMP-1与基质转换的关系，以及抗纤软肝颗粒对它们的影响。方法：将大鼠随机分为正常对照组、CCl4模型组与治疗组。采用250ml／L CCl4在大鼠皮下注射制备肝纤维化模型，并同时给与抗纤软肝颗粒治疗，各组分别于第3、5、7、9、11周分批处死大鼠，取肝脏标本。采用免疫组织化学法检测肝组织Ⅰ、Ⅲ型胶原，原位杂交的方法检测MMP-1 mRNA、TIMP-1 mRNA。结果：在肝纤维化形成过程中：①胶原持续增高，治疗组较同期模型组比较有不同程度的降低。②MMP-1 mRNA的表达先逐渐增强，后期有所下降；治疗组较同期模型组比较有不同程度的增强。③TIMP-1 mRNA的表达持续增强，治疗组较同期模型组比较有不同程度的减弱。TIMP-1 mRNA与Ⅰ、Ⅲ型胶原的表达呈显著正相关（P〈0．01）。结论：在肝纤维化过程中TIMP-1通过对MMP-1活性的抑制，导致ECM在肝脏内的过度沉积；抗纤软肝颗粒能促进MMP-1的表达，抑制TIMP-1的表达。促进肢原降解而产生抗肝纤维化作用。     

The role of matrix metalloproteinase-9 and tissue inhibitor of metalloproteinase-1 in cryptogenic organizing pneumonia

BACKGROUND: The processes observed in interstitial lung disease are associated with the production, deposition, and proteolysis of the extracellular matrix (ECM), which may lead to irreversible pulmonary structural remodeling or to appropriate repair without fibrosis. Matrix metalloproteinases (MMPs) and a tissue inhibitor of metalloproteinases (TIMPs) are known to regulate remodeling of the ECM and thus to be important in the process of lung fibrosis. Pulmonary structures are extensively remodeled in usual interstitial pneumonia (UIP), whereas severe architectural remodeling is minimally present in cryptogenic organizing pneumonia (COP). However, not much is known about the roles of MMP-9 and/or TIMP-1 in COP. METHODS: Levels of MMP-9, TIMP-1 and the molar ratio of MMP-9/TIMP-1 in BAL fluids were investigated in 11 patients with UIP, in 8 patients with COP, and in 10 control subjects. We checked the levels of MMP-9 and TIMP-1 by means of enzyme immunoassay, and the hydrolytic activity of MMP-9 in BAL fluids was measured by gelatin zymography. Further, we evaluated the expression of MMP-9 and TIMP-1 in lung tissue by immunohistochemistry. RESULTS: The concentrations of MMP-9 and TIMP-1 were significantly increased in patients with UIP and were even higher in patients with COP compared with control subjects. The levels of MMP-9 and TIMP-1 were significantly higher in patients with COP than in patients with UIP. The molar ratio of MMP-9/TIMP-1 was significantly higher in patients with COP than in control subjects. In patients with COP, the concentration of MMP-9 significantly correlated with the number of neutrophils and lymphocytes. Zymographic analysis revealed that the activity of the 92-kd pro-MMP-9 was increased in patients with UIP and was even higher in patients with COP, compared with control subjects. CONCLUSIONS: These data suggest that overproduction of MMP-9 and TIMP-1, and an imbalance between MMP-9 and TIMP-1, may have a role as diagnostic references in COP.     

Imbalanced matrix metalloproteinase-9 and tissue inhibitor of metalloproteinase-1 activities in patients with thromboangiitis obliterans

The pathogenic mechanisms of thromboangiitis obliterans (TAO) are not entirely known and the imbalance of matrix metalloproteinases (MMPs) plays a role in vascular diseases. We evaluated the MMP-2 and MMP-9 circulating levels and their endogenous tissue inhibitors of metalloproteinases (TIMP-1 and TIMP-2) in TAO patients with clinical manifestations. The study included 20 TAO patients (n = 10 female, n = 10 male) aged 38-59 years under clinical follow-up. The patients were classified into two groups: (1) TAO former smokers (n = 11) and (2) TAO active smokers (n = 9); the control group included normal volunteer non-smokers (n = 10) and active smokers without peripheral artery disease (n = 10). Patient plasma samples were used to analyze MMP-2 and MMP-9 levels using zymography, and TIMP-1 and TIMP-2 concentrations were determined by enzyme-linked immunosorbent assays. The analysis of MMP-2/TIMP-2 and MMP-9/TIMP-1 ratios (which were used as indices of net MMP-2 and MMP-9 activity, respectively) showed significantly higher MMP-9/TIMP-1 ratios in TAO patients (p < 0.05). We found no significant differences in MMP-2/TIMP-2 ratios (p > 0.05). We found higher MMP-9 levels and decreased levels of TIMP-1 in the TAO groups (active smokers and former smokers), especially in active smokers compared with the other groups (all p < 0.05). MMP-2 and TIMP-2 were not significantly different in patients with TAO as compared to the control group (p > 0.05). In conclusion, our results showed increased MMP-9 and reduced TIMP-1 activity in TAO patients, especially in active smokers compared with non-TAO patients. These data suggest that smoke compounds could activate MMP-9 production or inhibit TIMP-1 activity.     

腺相关病毒介导的小干扰RNA对大鼠肝星状细胞金属蛋白酶组织抑制因子-1及基质金属蛋白酶13表达的影响

目的 观察以腺相关病毒(AAV)为载体含有针对金属蛋白酶组织抑制因子(TIMP)-1具有较强抑制作用的小干扰RNA(siRNA)感染大鼠星状细胞系HSC-T6后TIMP-1及基质金属蛋白酶13(MMP13)的表达情况.方法 将对大鼠TIMP-1基因具有最强抑制作用的一对siRNA,在体外构建为短发夹siRNA表达载体后,将其包装为重组AAV-rAAV/siRNA-TIMP-1/neo并感染HSC-T6,于感染后4周及12周应用荧光定量PCR方法及Western blot方法分别检测TIMP-1及MMP13 mRNA及蛋白质表达情况.结果 经PCR、酶切及序列测定证实抑制作用最强的1对siRNA在体外构建的shRNA表达载体成功克隆.将重组质粒包装成病毒后感染HSC-T6细胞,与对照组细胞相比,rAAV/siRNA-TIMP-1/neo感染组在感染后4周及12周细胞TIMP-1 mRNA及蛋白质表达水平明显降低(P＜0.01),而MMP13 mRNA及蛋白质表达水平明显增高(P＜0.01).结论 化学合成的siRNA在短时期内可有效地抑制TIMP-1基因的表达,重组病毒rAAV/siRNA-TIMP-1/neo可长期有效地抑制TIMP-1基因表达.