肝纤维化大鼠肝组织基质金属蛋白酶9及其抑制因子1基因表达的动态变化及下瘀血汤对其影响

[目的]研究免疫性肝纤维化大鼠肝组织基质金属蛋白酶9(MMP-9 mRNA)和基质金属蛋白酶组织抑制因子1(TIMP-1 mRNA)基因表达的动态变化及下瘀血汤对其影响,探讨下瘀血汤抗肝纤维化的机制。[方法]猪血清腹腔注射复制大鼠肝纤维化模型,造模8周后灌胃给予下瘀血汤流浸膏干预治疗,用药4周后和造模过程中的1、2、4、8周动态处死大鼠,获取标本,检测指标。[结果]与正常组相比,模型组1、8、12周MMP-9 mRNA表达明显降低(P0.05,0.01),2周MMP-9 mRNA表达显著升高(P0.01),4周表达无明显变化。与模型组12周相比,下瘀血汤组MMP-9 mRNA表达明显升高(P0.05)。与正常组相比,1、2、4、8和12周模型组TIMP-1 mRNA表达均有显著升高(P0.05,0.01))。与12周模型组相比,下瘀血汤组TIMP-1 mRNA表达显著降低(P0.01)。[结论]大鼠猪血清免疫性肝纤维化存在着MMP-9 mRNA和TIMP-1 mRNA的动态变化,下瘀血汤可通过促进MMP-9 mRNA表达和抑制TIMP-1 mRNA表达而发挥抗肝纤维化的作用。     

Danshao Huaxian capsule in treatment of decompensated cirrhosis resulting from chronic hepatitis B

BACKGROUND: The prognosis of decompensated cirrhosis resulting from chronic hepatitis B is poor, and the benefits of treatment with interferon are ourweight serious sideeffects and the risk of fatal exacerbation of disease. Danshao Huaxian capsule rapidly reduces hepatitis B virus(HBV)-DNA in serum to undetectable levels. METHODS: A total of 35 patients with chronic hepatitis B and decompensated cirrhosis were treated with Danshao Huaxian 1.2g. po. tid daily. Before the treatment, HBVDNA in serum was positive in all patients. Ten patients had Child-Pugh class B and 25, class C hepatitis B. Seven patients underwent liver transplantation within 6 months of initial treatment. Of the 10 patients of class B, 5 died within 6 months, and the other 5 did not complete the treatment for some reasons; the 25 patients of class C were treated for at least 6 months (mean =19 months). RESULTS: In most of the 25 patients, liver function was improved slowly but markedly after 9 months of treatment, showing a decreased level of serum bilirubin from 67±13 to 30±4μmol/L (P<0.05, baseline vs.6 months), an increased level of serum albumin from 27±1 to 34±1 g/L(P<0.05) and a decreased level of Child-Pugh score from 10.3±0.4 to 7.5+0.5 (P<0.05). Three patients developed resistance to Danshao Huaxian because of a mutation in the YMDD motif, but liver function was not deteriorated. Inhibition of viral replication with Danshao Huaxian resulted in a significant improvement of liver function in patients with decompensated HBV cirrhosis, but the long-term results remain uncertain. CONCLUSION: Danshao Huaxian capsule is effective in inhibiting viral DNA replication in patients with decompensated cirrhosis and making clinical improvement.     

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.     

肺表面活性物质对COPD大鼠模型基质金属蛋白酶-9及其抑制剂的影响

目的观察慢性阻塞性肺病（COPD）大鼠模型基质金属蛋白酶9（MMP-9）、MMP组织抑制剂（TIMP-1）表达,以及肺表面活性物质（PS）对其的影响。方法用香烟熏吸加气管内注入脂多糖法建立大鼠COPD模型,PS进行干预,观察其肺功能、肺组织病理学改变,免疫组化法检测肺MMP-9及TIMP-1表达;并设正常对照组。结果COPD组肺功能与对照组有明显统计学差异。COPD组MMP-9表达强阳性,TIMP-1轻度增多,二者比例失衡。PS干预后肺功能改善,组织损伤减轻,MMP-9阳性表达减弱,MMP-9、TIMP-1比例趋于平衡。结论PS对COPD有预防保护作用,可延缓其病情发展。     

复方红景天对大鼠肝纤维化肝脏中TIMP-1表达的影响

目的:探讨复方红景天对四氯化碳(CCl4)诱导的大鼠肝纤维化肝组织TIMP-1基因表达的影响.方法:健康♂SD大鼠80只随机分组:(1)正常对照组;(2)肝纤维化模型组;(3)复方红景天高剂量组(H组);(4)复方红景天中剂量组(M组);(5)复方红景天低剂量组(S组),每组16只.以CCl4 ip法诱导大鼠肝纤维化,复方红景天干预组大鼠在造模的同时给予复方红景天灌胃,正常对照组给予橄榄油sc和生理盐水ip,8 wk实验结束时处死动物,留取的肝脏组织做HE按0-4期标准判定肝纤维化程度,应用半定量RT-PCR检测肝组织中TIMP-1 mRNA的表达情况,用免疫组化检测肝组织中TIMP-1的表达.结果:模型组大鼠肝纤维化程度处于2-4期,其中大部分达3期以上.复方红景天干预组大鼠肝纤维化程度明显减轻,只有少部分达3期.模型组大鼠肝组织中TIMP-1 mRNA水平高于正常对照组(0.858±0.052 VS 0.615±0.067,P＜0.05),而复方红景天干预组大鼠肝组织中TIMP-1 mRNA水平(0.740±0.081,0.704±0.032,0.695±0.030)显著低于模型组(均P＜0.05);模型组大鼠肝组织TIMP-1的阳性表达显著强于正常对照组(0.3564±0.052 VS 0.121±0.067.P＜0.05),复方红景天干预组肝组织中TIMP-1的阳性表达(0.298±0.081,0.256±0.032,0.213±0.030)明显强于正常对照组(均P＜0.05),但较模型组显著减弱(P＜0.05).结论:中药复方红景天能有效抑制CCl4诱导的肝纤维化大鼠肝脏中TIMP-1的表达.     

奥曲肽对肝星状细胞胶原合成及TIMP-1、MMP-2表达的影响

目的研究奥曲肽(OCT)对体外培养的大鼠肝星状细胞(HSC)胶原分泌及TIMP-1mRNA、MMP-2mRNA表达的影响。方法体外培养大鼠HSC,HSC随机分为4组,分别加入不同浓度的OCT,用ELISA法检测细胞上清液中的Ⅰ、Ⅲ型胶原的含量,半定量RT-PCR法检测OCT对HSC中MMP-2、TIMP-1 mRNA表达的影响。结果应用OCT干预后,HSC合成Ⅰ、Ⅲ型胶原减少,TIMP-1 mRNA的表达较少,而MMP-2 mRNA表达明显增加,差异有显著性(P<0.05)。结论OCT可以抑制HSC的Ⅰ、Ⅲ型胶原的合成,增强MMP-2mRNA的表达,抑制TIMP-1mRNA的表达,这可能是OCT发挥抗肝纤维化作用的途径之一。     

秋水仙碱对肝纤维化大鼠肝脏基质金属蛋白酶-1及其抑制因子-1表达的影响

目的 观察秋水仙碱对纤维化肝脏基质金属蛋白酶-1(MMP-1)、基质金属蛋白酶组织抑制因子-1(TIMP-1)表达的影响,从胶原降解的角度探讨秋水仙碱对肝纤维化有无逆转作用及可能存在的机制.方法 制备免疫性大鼠肝纤维化模型,并给予秋水仙碱治疗;通过RT-PCR检测MMP-1、TIMP-1的表达,并作Ⅰ、Ⅲ型胶原的免疫组化以及Masson胶原染色.结果 发现秋水仙碱对肝纤维化大鼠MMP-1的表达无明显影响(P>0.05),但可以抑制TIMP-1的表达(P<0.05),促进Ⅰ、Ⅲ型胶原的降解(P<0.05);然而在病理形态学的观察中,未发现秋水仙碱治疗组与肝纤维化模型组之间存在的显著性差异(P>0.05).结论 秋水仙碱可以抑制纤维化肝脏TIMP-1的表达,从而增强间质胶原酶的活性,促进Ⅰ、Ⅲ型胶原的降解,产生抗肝纤维化的作用,但其作用有限.     

Relationships of adiponectin and matrix metalloproteinase-9 to tissue inhibitor of metalloproteinase-1 ratio with coronary plaque morphology in patients with acute coronary syndrome

OBJECTIVES:

Adiponectin, an adipocyte-specific protein, matrix metalloproteinases (MMPs) and tissue inhibitors of metalloproteinases (TIMPs) play a crucial role in arteriosclerosis and plaque disruption. The present study was designed to elucidate the relationship of adiponectin and the ratio of MMP-9/TIMP-1 and their effects on the stability of plaque in acute coronary syndrome (ACS).

METHODS:

The concentrations of adiponectin, MMP-9, TIMP-1 and interleukin-10 were analyzed using ELISA in 56 consecutive unselected patients divided into two groups, stable angina (n=13) and ACS (n=43), and were compared with 19 healthy control subjects. The 56 patients were also angiographically studied and divided into two groups, simple lesion (n=22) and complex lesion (n=34), based on coronary plaque morphology.

RESULTS:

The ratio of MMP-9/TIMP-1 showed significantly higher values in the ACS group compared with the control group (0.22±0.10 versus 0.11±0.03; P<0.001). Adiponectin was negatively correlated with the ratio of MMP-9/TIMP-1 (r=–0.332; P=0.008) and positively correlated with interleukin-10 (r=0.651; P=0.001). Multivariate logistic regression analysis showed that adiponectin (P=0.046) and MMP-9/TIMP-1 (P=0.044) are independent predictors for ACS, and MMP-9/TIMP-1 (P=0.013) is an independent predictor for complex lesion morphology plaques.

CONCLUSION:

In the present study, it was found that adiponectin has a negative relationship with the ratio of MMP-9/TIMP-1 in patients with ACS, and that the ratio of MMP-9/TIMP-1 is an independent predictor of the stability of atherosclerotic plaque and the severity of coronary atherosclerosis.     

辛伐他汀对慢阻肺大鼠MMP-9及其抑制剂表达的影响

目的研究辛伐他汀对慢性阻塞性肺病大鼠基质金属蛋白酶-9(MMP-9)及其抑制剂(TIMP-1)表达的影响。方法选用30只健康的雄性SD大鼠作为实验材料,将30只大鼠分为三组:A组10只,B组10只,C组10只。B组和C组构建慢阻肺模型,C组大鼠采用辛伐他汀治疗。比较各组大鼠的一般症状、肺功能、支气管肺泡灌洗液(BALF)细胞计数和血清MMP-9、TIMP-1水平。结果 4w后,各组大鼠的体质量、FEV0.3s、FVC、FEV0.3s/FVC、PEV和BALF细胞计数具有统计学差异(P0.05)。A组大鼠MMP-9为(87.14±21.76)ng/ml,TIMP-1为(82.16±14.89)ng/ml,MMP-9/TIMP-1为(1.07±0.09);B组大鼠MMP-9为(241.58±38.94)ng/ml,TIMP-1为(167.92±19.76)ng/ml,MMP-9/TIMP-1为(1.44±0.21);C组大鼠MMP-9为(134.25±29.15)ng/ml,TIMP-1为(119.41±15.62)ng/ml,MMP-9/TIMP-1为(1.12±0.1),差异具有统计学意义(P0.05)。结论辛伐他汀可以降低慢阻肺大鼠基质金属蛋白酶-9及其抑制剂的表达水平,并改善两者的比例失衡。     

秋水仙碱对肝纤维化大鼠肝脏基质金属蛋白酶—1及其抑制因 …

目的 观察秋水仙碱对纤维化肝脏基质金属蛋白酶－１（ＭＭＰ－１）、基质金属蛋白酶组织抑制因子－１（ＴＩＭＰ－１）表达的影响。从胶原降解的角度探讨秋水仙碱对肝纤维化有无逆转作用及可能存在的机制。方法 制备免疫性大鼠肝纤维化模型,并给予秋水仙碱治疗;通过ＲＴ－ＰＣＲ检测ＭＭＰ－１、ＴＰＭＰ－１的表达,并作Ⅰ、Ⅲ型胶原的免疫组化以及Ｍａｓｓｏｎ胶原染色。结果 发现秋水仙碱对肝纤维化大鼠ＭＭＰ－１的表达无明     

金属基质蛋白酶9及其组织抑制物1在肾组织中的表达和调控

目的:观察STZ鼠肾组织及高糖状态下正常人类系膜细胞(NHMC)中金属基质蛋白酶9(MMP-9)、金属基质蛋白酶组织抑制物1(TIMP-1)表达状况及磷酸肌酸激酶(PKC)抑制剂对其表达的影响,探讨糖尿病肾病(DN)时PKC抑制剂在细胞外基质降解中的作用。方法:Wistar大鼠随机分为正常对照组、DN模型组、PKC抑制剂组。PKC抑制剂组采用根皮素10mg/(kg.d)混悬液灌胃进行干预。第8周处死大鼠(每组6只)。检测24h尿蛋白定量、血肌酐水平。用免疫组化方法检测肾脏组织MMP-9、TIMP-1的表达。用ELISA方法检测肾脏组织PKC活性。体外实验,将NHMC置37℃,5%CO2培养箱中进行培养。并将NHMC分为N组(对照组):糖浓度5mmol/L,H组(高糖组):糖浓度30mmol/L,P组(高糖加PKC抑制剂):糖浓度30mmol/L加chelery thrine chloride 10-5mmol/L,M组(甘露醇组):甘露醇30mmol/L。于培养24、48、72h后用MTT法测定细胞增值。采用ELISA方法检测四组PKC活性。分别用RT-PCR及Western Blot检测各组MMP-9、TIMP-1mRNA及蛋白表达。结果:DN模型组尿蛋白排泄明显增加(P<0.01),血肌酐上升(P<0.05),PKC活性明显增高,MMP-9和TIMP-1出现表达,MMP-9/TIMP-1比值降低。PKC抑制剂干预后其尿蛋白排泄明显减少,血肌酐水平降低,PKC活性下降,MMP-9、TIMP-1表达上调,其MMP-9/TIMP-1比值增高。体外实验中,高糖能促进NHMC增殖,且NHMC的增殖状况随时间的递增而明显增加。高糖(30mmol/L)能增加系膜细胞PKC的活性,MMP-9、TIMP-1较高表达,MMP-9/TIMP-1比值降低。而PKC抑制剂使PKC的活性降低同时,MMP-9、TIMP-1表达上调,MMP-9/TIMP-1比值增高。结论:高糖可诱导PKC活性,PKC抑制剂能使MMP-9、TIMP-1表达上调,MMP-9/TIMP-1表达比值升高,推测PKC的活性状况可影响DN细胞外基质降解过程。     

OSAHS、OSAHAHT最者血清基质金属蛋白酶9及其抑制因子水平

目的 探讨阻塞性睡眠呼吸暂停低通气综合征（obstructive sleep apnea-hypopnea syndrome，OSAHS）、阻塞性睡眠呼吸暂停低通气综合征相关性高血压（obstructive sleepapnea-hypopnea associated hypertension，OSAHAHT）患者血清基质金属蛋白酶9（MMP-9）及其抑制剂，基质金属蛋白酶组织抑制因子1（TIMP-1）水平的变化。方法 用酶联免疫吸附法对20例OSAHS、OSAHAHT患者血清MMP-9和TIMP-1水平测定，与16例健康对照组进行比较。结果 OSAHS、OSAHAHT患者血清MMP-9水平较正常对照组明显升高，有显著统计学意义，TIMP-1在OSAHS与对照组无明显差异，在OSAHAHT与对照组有明显差异，OSAHS、OSAHAHT患者血清MMP-9与反映睡眠呼吸暂停严重程度的指标有明显相关性。结论 OSAHS、OSAHAHT患者存在MMP-9及TIMP-1代谢的异常，血清MMP-9可反映睡眠呼吸暂停病情的严重程度。     

结缔组织生长因子和金属蛋白酶组织抑制因子-1 RNA干扰靶位的筛选

目的筛选能有效抑制肝纤维化形成的结缔组织生长因子（CTGF）和金属蛋白酶组织抑制因子-1（TIMP-1）的RNA干扰靶位。方法根据大鼠CTGF和TIMP-1基因序列,分别设计3个RNA干扰候选靶位,化学合成双链RNA（dsRNA）,各自转染或不同组合后转染经TGF-β1刺激活化的大鼠肝星状细胞（HSC）,48h后抽提RNA并逆转录成cDNA,采用荧光定量PCR法测定并计算CTGF和TIMP-1、Ⅰ型前胶原（procol-α1）mRNA的相对表达量与抑制率,采用RIA法检测HSC培养上清液肝纤维化指标。结果在进行单独针对CTGF基因干扰时,CTGF-3组对CTGF mRNA及其下游产物Procol-α1 mRNA的转录抑制作用最佳（抑制率分别达68.09%与65.03%）,在单独针对TIMP-1基因干扰时,TIMP-1-3组对TIMP-1 mRNA及其下游产物Procol-α1 mRNA的转录抑制作用最佳（抑制率分别达68.55%与62.84%）;在联合干扰时,CTGF-3/TIMP-1-3组联合对CTGF mRNA和TIMP-1 mRNA的抑制最强（抑制率分别达76.60%与79.03%）,而以CTGF-2/TIMP-1-3组联合对Procol-α1 mRNA的抑制作用最强（抑制率达85.79%）。结论成功筛选出针对CTGF和TIMP-1最有效的RNA干扰靶位,联合干扰较单独干扰效果更强。     

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。     

Matrix metalloproteinase-9, tissue inhibitor of metalloproteinase-1, B tenascin-C and ED-A fibronectin in dilated cardiomyopathy: Potential impact on disease progression and patients' prognosis

Background

Dilated cardiomyopathy (DCM) is associated with heart failure and increased mortality and there is no reliable biomarker to estimate patients' prognosis. During cardiac remodeling, an extensive reorganization of the extracellular matrix occurs. The study was aimed to investigate matrix metalloproteinase 9 (MMP-9), tissue inhibitor of metalloproteinase 1 (TIMP-1) and fetal tenascin-C (B⁺ Tn-C) and fibronectin (ED-A⁺ Fn) variants known to be involved in that process.

Methods and results

In 187 patients with DCM, levels of MMP-9, TIMP-1 and B⁺ Tn-C in serum as well as B⁺ Tn-C and ED-A⁺ Fn in tissue were quantified and subjected to univariate analysis. For all serum markers, concentrations above a calculated threshold were associated with decreased survival (MMP-9: p = 0.008, TIMP-1: p = 0.001, B⁺ Tn-C: p < 0.001) and a significantly higher risk to die or undergo transplantation. In tissue, a reexpression of B⁺ Tn-C and ED-A⁺ Fn could be shown. Protein deposition levels of ≥ 4.5% for B⁺ Tn-C and ≥ 2.1% for ED-A⁺ Fn were associated with a significantly decreased survival (p = 0.001 for B⁺ Tn-C, p = 0.031 for ED-A⁺ Fn) and an increased risk to die or undergo transplantation. In a multivariate analysis, TIMP-1 is the superior parameter to predict transplantation free survival (p = 0.027).

Conclusions

Serum levels of MMP-9, TIMP-1 and B⁺ Tn-C and tissue levels of B⁺ Tn-C and ED-A⁺ Fn are promising markers for risk assessment. The reoccurrence of ED-A⁺ Fn and the availability of a human antibody usable as a vehicle for targeted drug delivery might be the basis for novel therapeutic strategies.     

他汀类药物对基质金属蛋白酶-1及组织型基质金属蛋白酶抑制剂-1的影响

目的观察阿托伐他汀(立普妥)、普伐他汀(普拉固)对大鼠腹腔巨噬细胞分泌基质金属蛋白酶-1(MMP-1)及组织型基质金属蛋白酶抑制剂-1(TIMP-1)的影响。方法培养的大鼠腹腔巨噬细胞中先加入10ng/ml的白介素-1β(IL-1β),促进MMP-1的分泌,24h后加入不同浓度的阿托伐他汀、普伐他汀(1×10-7mmol/L、1×10-6mmol/L、1×10-5mmol/L、1×10-4mmol/L),继续孵育24h后,采用酶联免疫吸附法(ELISA法)测培养上清液中的MMP-1及TIMP-1的浓度;取阿托伐他汀10-5mmol/L浓度,分别在6h、24h、48h测培养上清液中的MMP-1的浓度。结果随着药物浓度的增加(1×10-7mmol/L、1×10-6mmol/L、1×10-5mmol/L、1×10-4mmol/L),阿托伐他汀对大鼠腹腔巨噬细胞分泌MMP-1的抑制作用逐渐增强(加药组MMP-1分泌较对照组分别减少17.36%、19.40%、26.54%、33.70%),与对照组有显著统计学差异,而不同浓度的普伐他汀虽使大鼠腹腔巨噬细胞分泌MMP-1略有降低,但与对照组比较无统计学差异,且各组间也无统计学差异;两组他汀使大鼠腹腔巨噬细胞TIMP-1的分泌均略有降低,但与对照组比较,均无统计学意义;随着药物作用时间的延长(6h、24h、48h),阿托伐他汀(1×10-5mmol/L)对大鼠腹腔巨噬细胞分泌MMP-1的抑制作用逐渐增强(加药组MMP-1分泌较对照组分别减少11.96%、26.54%、32.77%),与对照组有显著统计学差异。结论阿托伐他汀呈时间剂量依赖性抑制IL-1β介导的大鼠腹腔巨噬细胞分泌MMP-1,而对TIMP-1的分泌无影响;普伐他汀对IL-1β介导的大鼠腹腔巨噬细胞分泌MMP-1无影响,对TIMP-1的分泌也无影响。