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…     

COPD患者血浆金属蛋白激酶及组织抑制物含量的研究

目的研究慢性阻塞性肺病（Chronic obstructive pulmonary disease,COPD）患者血清基质金属蛋白酶（Matrix metal-loproteinase,MMP）-9和金属蛋白激酶组织抑制物（Tissue inhibitors of metalloproteinases,TIMPs）-1含量,以探讨它们与气道阻塞之间的关系。方法收集72例COPD,26例支气管哮喘（简称哮喘）以及66例对照患者的静脉血,利用ELISA方法测定上述血清TIMP-1和MMP-9含量,并对COPD进行呼吸功能测定,对TIMP-1、MMP-9含量与第一秒用力肺活量进行相关性分析。结果COPD患者血清TIMP-1含量（193.0±5.3μγ/L）显著高于对照组（119.9±6.5）μg/L和哮喘组（162.1±13.6）μg/L,并与COPD患者的第一秒用力肺活量呈负相关性,MMP-9/TIMP-1摩尔比值低于对照组,COPD急性加重期TIMP-1含量升高。结论血清TIMP-1含量在COPD气道阻塞和急性加重期升高。     

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。     

慢性乙型肝炎患者外周血单个核细胞基质金属蛋白酶-1及其抑制因子基因的表达

目的 比较外周血单个核细胞(PBMC)及自身血清中基质金属蛋白酶-1(MMP-1)及金属蛋白酶组织抑制因子-1(TIMP-1)表达水平,探讨MMP-1及TIMP-1基因表达对肝纤维化的诊断价值.方法 实时荧光定量反转录聚合酶链反应(FQ-RT-PCR)方法分别检测37例慢性乙型肝炎患者及20例健康对照者PBMC中MMP-1及TIMP-1 mRNA的表达水平,双抗体央心酶联免疫吸附方法检测血清MMP-1及TIMI-1水平;慢性乙型肝炎患者均行肝组织穿刺活检,行纤维化程度分期(S).组间比较采用多个独立样本非参数检验,并作Spearman相关性分析.结果 健康对照组PBMC中MMP-1 mRNA及TIMP-1 mRNA呈低水平表达,慢性乙型肝炎患者PBMC中MMP-1mRNA表达水平与健康对照组比较差异无统计学意义,而TIMP-1 mRNA表达水平显著高于健康对照组的(0.48±0.80)lg拷贝/μL,血清TIMP-1也高于健康对照组的(158.29±58.58)μg/L.随着慢性乙型肝炎肝纤维化程度加重,各期之间MMP-1 mRNA的表达水平及血清MMP-1水平比较差异无统计学意义(χ~2=8.960,P=0.111;χ~2=7.898,P=0.211);从S1～S4,TIMP-1 mRNA表达水平依次为(1.67±0.84)、(3.48±2.08)、(5.86±3.47)及(8.14±6.48)lg拷贝/μL,血清TIMP-1水平依次为(233.73±64.84)、(262.10μ71.12)、(301.15μ62.74)及(381.15±152.75)μg/L,各期之间TIMP-1mRNA表达水平及血清TIMP-1水平比较差异均有统计学意义(χ~2=14.290,P=0.002;χ~2=12.209,P=0.007).PBMC中TIMI-1 mRNA、血清TIMP-1与肝纤维化呈正相关(r=0.752.P<0.01;r=0.530,P=0.008).结论 PBMC中TIMP-1 mRNA表达水平及血清TIMP-1水平与肝脏纤维化程度密切相关.PBMC中TIMP-1 mRNA及血清TIMP-1可以作为诊断肝纤维化的新指标,尤其PBMC中TIMP-1 mRNA诊断价值最大.     

基质金属蛋白酶9和基质金属蛋白酶组织抑制物1在不同性质胸腔积液诊断和鉴别诊断中的应用

目的 探讨基质金属蛋白酶9(MMP-9)、基质金属蛋白酶组织抑制物1(TIMP-1)及MMP-9/TIMP-1比值在结核性和仲瘤性胸腔积液形成过程中的作用及在上述胸腔积液诊断和鉴别诊断中的价值.方法 采用ELISA法测定36例结核性胸膜炎、38例恶性肿瘤和14例漏出液患者胸水中MMP-9和TIMP-1的浓度.结果 ①结核性胸腔积液组胸水中MMP-9浓度、TIMP-1浓度和MMP-9/TIMP-1比值均高于恶性胸腔积液组和漏出液组(P值均＜0.05),恶性胸腔积液组上述指标均高于漏出液组(P值均＜0.05).②恶性胸水脱落细胞学检查阳性组MMP-9浓度、MMP-9/TIMP-1 均高于细胞学检查阴性组(P值均＜0.05),TIMP-1浓度低于细胞学检查阴性组(P＜0.05).③MMP-9和TIMP-1之间呈正相关(r=0.239,P=0.025);MMP-9、MMP-9/TIMP-1分别与胸水乳酸脱氢酶、腺苷脱氨酶、蛋白质、白细胞总数、淋巴细胞比例之间显著正相关(P值均＜0.01);MMP-9、MMP-9/TIMP-1分别与胸水葡萄糖、氯化物之间呈显著负相关(P值均＜0.01);TIMP-1与乳酸脱氢酶、腺苷脱氨酶、蛋白质、淋巴细胞比例之间呈显著正相关(P值均＜0.01).④胸水中MMP9、TIMP-1、MMP-9/TIMP-1比值在恶性胸腔积液诊断中的敏感性分别为63.2%、71.1%和65.8%,特异性分别为83.3%、63.9%和80.6%.采用胸水MMP-9和TIMP-1串联联合检测的敏感性和特异性分别为39.5%和91.7%,并联联合检测的敏感性和特异性分别为94.7%和55.6$%.结论 MMP-9和TIMP-1与结核性胸膜炎和恶性胸腔积液的形成密切相关,MMP-9/TIMP-1比例的失衡在此过程中扮演了重要角色,胸水MMP-9、TIMP-1及MMP-9/TIMP-1比值的检测有助于结核性胸膜炎和恶性肿瘤所致胸腔积液的鉴别诊断.     

Plasma MMP-2-TIMP-2 complex levels measured during follow-up predict a risk of relapse in patients with malignant lymphoma

Objectives:  Circulating gelatinases and their tissue inhibitors measured at diagnosis have been shown to exhibit prognostic relevance in several solid tumours. The clinical data concerning their role in follow-up of cancer are still very preliminary. The aim of this study was to find out whether the concentrations of these circulating markers could be used as follow-up markers predicting the risk of lymphoma relapse.
Methods:  Here, we investigated these circulating molecules in a large ( n  = 126) follow-up material of lymphoma patients and in healthy controls ( n  = 44). The plasma samples of patients with Hodgkin's lymphoma ( n  = 31), non-Hodgkin's lymphoma ( n  = 95), and healthy controls were analysed by enzyme-linked immunosorbent assay for matrix metalloproteinase-9 (MMP-9), proMMP-2, matrix metalloproteinase-2-tissue inhibitor of metalloproteinase-2 (MMP-2-TIMP-2) complex, TIMP-1, and TIMP-2.
Results:  The patients with the highest plasma levels of MMP-2-TIMP-2 complex had a 3-fold risk of relapse when compared to the patients with lower levels ( P  = 0.036). Plasma levels of proMMP-2 and MMP-2-TIMP-2 complex as well as the proMMP-2/TIMP-2 ratio were significantly higher in patients with active lymphoma and those in remission when compared to healthy controls. On the contrary, the values of TIMP-2 were significantly lower in lymphoma patients than in controls.
Conclusions:  This study shows that lymphoma patients with the highest levels of MMP-2-TIMP-2 complex are at a marked risk of relapse. Moreover, plasma levels of MMP-2-TIMP-2 complex, proMMP-2, TIMP-2, and proMMP-2/TIMP-2 ratio are at abnormal level in patients with newly diagnosed lymphoma and those in remission when compared to healthy controls. They remain abnormal even after successful lymphoma treatments.     

Increased expression of matrix metalloproteinase-9 associated with gastric ulcer recurrence

AIM: To compare matrix metalloproteinase (MMP)-9 and tissue inhibitor of metalloproteinase (TIMP)-1 in gastric ulcer (GU) and chronic superficial gastritis (CSG). METHODS: This study enrolled 63 patients with GU and 25 patients with CSG. During upper gastroduodenal endoscopy, we took samples of gastric mucosa from the antrum and ulcer site from patients with GU, and samples of antral mucosa from patients with CSG. Mucosal biopsy tissues were cultured for 24 h, and the culture supernatant was measured for levels of MMP-9 and TIMP-1. After receiving eradication therapy for Helicobacter pylori (H. pylori ) and 8 wk proton-pump inhibitor therapy for GU, follow-up endoscopy examination was performed after 6 mo and whenever severe symptoms occurred. RESULTS: Levels of MMP-9 and TIMP-1 at the ulcer site or in the antrum were significantly higher in GU than CSG patients. MMP-9 levels at the ulcer site were significantly higher than in the antrum in GU patients, and had a significantly positive correlation with TIMP-1. MMP-9 levels were significantly higher in H. pylori -positive than H. pylori -negative GU and CSG patients. Levels of MMP-9 or TIMP-1 at the ulcer site were associated with the histological severity of activity and inflammation. About 57 GU patients were followed up, and seven had GU recurrence. H. pyloriinfection and MMP-9 levels were risk factors for the recurrence of GU adjusted for age and sex by multiple logistic regression analysis. CONCLUSION: MMP-9 may perform an important function in gastric ulcer formation and recurrence.     

慢性阻塞性肺疾病血清基质金属蛋白酶-9和组织型金属蛋白酶抑制物-1的检测及其意义

目的 检测慢性阻塞性肺疾病(chronic obstructive pulmonary disease,COPD)急性加重期、稳定期患者和健康对照者血清中基质金属蛋白酶-9 (matrix metalloproteinase-9,MMP-9)和组织型金属蛋白酶抑制物-1 (tissue inhibitor of met...     

SLE患者血清MMP-9、TIMP-1水平测定及其临床意义

目的探讨系统性红斑狼疮（SLE）患者血清基质金属蛋白酶9（MMP-9）及其抑制物（TIMP-1）的表达特点及临床意义。方法用双抗体夹心酶联免疫吸附试验（ELISA）检测64例SLE患者（SLE组）和25名健康人（对照组）血清MMP-9和TIMP-1的水平并进行比较分析。结果 SLE组患者血清MMP-9水平明显低于对照组,TIMP-1明显高于对照组（P〈0.01）,且MMP-9/TIMP-1低于对照组（P〈0.05）;SLE患者活动期血清MMP-9、MMP-9/TIMP-1明显低于缓解期（P〈0.05）,但TIMP-1的水平差异无统计学意义（P〉0.05）;狼疮肾炎组MMP-9低于非肾炎组（P〈0.05）,但TIMP-1差异无统计学意义（P〉0.05）;MMP-9及TIMP-1水平在LN各病理类型患者中的差异无统计学意义（P〉0.05）;患者的临床表现与MMP-9及TIMP-1水平无明显关系。结论 MMP-9及TIMP-1可能参与SLE的发病,血清MMP-9水平可作为反映SLE活动程度、肾脏损害的指标。     

老年男性糖尿病脑梗死患者血MMP-9和TIMP-1水平变化

用酶联免疫吸附方法(ELISA)检测糖尿病脑梗死组、非糖尿病脑梗死组、糖尿病非脑梗死组、健康对照组的基质金属蛋白酶9(MMP-9)、组织基质金属蛋白酶抑制物1(TIMP-1)的水平.结果 显示糖尿病脑梗死组MMP-9、TIMP-1水平明显明显高于其他3组(P＜0.05),提示其可能在糖尿病脑梗死发病过程中有重要作用.     

Effects of valsartan on matrix metalloproteinase-2 and tissue inhibitor of matrix metalloproteinase-2 in atrial fibrillation patients

Background To observe the effects of valsartan on matrix metalloproteinase-2 （MMP-2） and tissue inhibitor of matrix metalloproteinase-2 （TIMP-2） in atrial fibrillation patients. Methods 30 patients with non-vavular atrial fibrillation（NVAF） as atrial fibrillation group （AF group） were randomly divided into two groups： 15 patients were in therapy group （valsartan 80 mg qd） and 15 patients were in control group. Plasma MMP-2 and TIMP-2 level between therapy and control group before and after treatment and 30 normal patients as normal group （SN group） were measured by ELISA. Results High levels of MMP-2 were observed in AF group comparing with normal group （P0.01）, and the level of TIMP-2 was significantly lower （P0.01）. There was no difference between therapy group and control group in MMP-2 and TIMP-2 before treatment. However,after three months treatment, MMP-2 in therapy group was significantly lower than control group（P0.001）. While in therapy group there was a significant difference before and after in MMP-2（P0.01） and TIMP-2 （P0.05）. Conclusions There are high level of MMP-2 and lower TIMP-2 in NVAF patients. Valsartan might inhibit the process of non-vavular atrial fibrillation by down regulating of MMP-2 and up regulating of TIMP-2.     

特发性肺纤维化患者支气管肺泡灌洗液和血清基质金属蛋白酶及其抑制剂检测

目的探讨特发性肺纤维化(IPF)患者支气管肺泡灌洗液(BALF)及血清中基质金属蛋白酶9(MMP9)、基质金属蛋白酶组织抑制剂1(TIMP1)水平的变化。方法2001至2004年用酶联免疫吸附(ELISA)法检测30例IPF患者BALF及血清中MMP9和TIMP1的水平,同时行肺高分辨率CT(HRCT)及肺功能检查。健康非吸烟的自愿献血者30名,为血清对照组。以胸痛为自觉症状在我院自愿进行纤维支气管镜及BALF检查,经体检及X线检查证实为健康者13名,作为BALF对照组。结果IPF患者BALF及血清中MMP9水平为(245±26)和(203±32)ng/L,对照组为(205±22)和(186±16)ng/L,两组相比差异无统计学意义;IPF组BALF及血清中TIMP1水平[(522±81)、(166±29)ng/L]高于对照组[(201±31)、(87±16)ng/L],差异有统计学意义;IPF组BALF及血清中MMP9/TIMP1比值(0.53±0.18,1.5±0.3)低于对照组(1.06±0.38,2.6±0.5)。HRCT、肺功能评分及BALF中上述指标与MMP9无明显相关性,与TIMP1呈正相关,与MMP9/TIMP1比值呈负相关。结论IPF患者肺纤维化的发生与TIMP1水平升高及MMP9/TIMP1比值降低对细胞外基质降解的抑制有关,后者可能意义更大;患者肺影像学及肺功能变化可能也与此有关。     

阿托伐他汀对急性冠状动脉综合征患者血清MMP-9及TIMP-1水平的影响

目的 :测定急性冠状动脉综合征 (ACS)患者经阿托伐他汀治疗前后血清明胶酶B(MMP 9)、基质金属蛋白酶组织抑制因子 1 (TIMP 1 )水平 ,探讨两者水平与粥样斑块破裂的关系及他汀类调脂药物稳定斑块的可能机制。方法 :选择稳定型心绞痛 (SAP)患者 3 0例 ,ACS患者 5 4例 ,并选择 3 0例健康人作为对照。随机将ACS患者分成阿托伐他汀治疗组 ( 3 0例 )及常规治疗组 ( 2 4例 ) ,比较各组患者血清MMP 9,TIMP 1水平变化。结果 :SAP、ACS、健康对照组三组之间MMP、TIMP 1水平比较差异有统计学意义 ,阿托伐他汀治疗组与常规治疗组治疗后血清MMP 9、TIMP 1水平相比差异有统计学意义。结论 :血清MMP 9升高及TIMP 1降低与粥样斑块破裂明显相关。阿托伐他汀可降低ACS患者血清MMP 9水平 ,升高TIMP 1水平 ,从而起到稳定斑块的作用     

Serum matrix metalloproteinase-1 in patients with chronic viral hepatitis

BACKGROUND AND AIMS: Previously we found that serum matrix metalloproteinase (MMP)-1 activity decreased with progression of chronic liver disease. Our objectives in the present study were to observe the change in the serum MMP-1 protein concentration using recently developed specific enzyme immunoassays for MMP-1 and MMP-1 complexed with tissue inhibitor of metalloproteinases (TIMP)-1 and to elucidate the clinical usefulness of the serum MMP-1 test in chronic viral hepatitis. We measured the serum concentrations of MMP-1 and MMP-1/TIMP-1 complex using these immunoassays in 64 patients with histologically characterized chronic viral hepatitis. RESULTS: Serum MMP-1 concentration was inversely related to the histological severity of chronic hepatitis (P< 0.0001). It was closely associated with the histological degree of periportal necrosis (P< 0.0001), intralobular necrosis (P< 0.005), portal inflammation (P<0.0001) and liver fibrosis (P< 0.05). The serum concentration of MMP-1/TIMP-1 complex was also related to the histological severity of chronic hepatitis (P< 0.0001). It was associated with the degree of portal inflammation (P< 0.05), but not with the degree of periportal necrosis, intralobular necrosis or liver fibrosis. As serum MMP-1 level was closely associated with the histological degree of necroinflammation, we examined the ability of the serum MMP-1 test to differentiate active and inactive forms of hepatitis with a receiver operating curve. The results were compared with those of serum procollagen type III N-peptide (PIIINP) test. We found that the serum MMP-1 test was superior to the serum PIIINP test in assessing liver necroinflammation. CONCLUSIONS: In addition to the previously reported changes in enzyme activity, MMP-1 proteins in serum decreased during histological progression of chronic hepatitis. The serum MMP-1 test may be useful clinically to differentiate active and inactive types of hepatitis in patients with chronic viral hepatitis.     

急性冠脉综合征患者血浆sCD40L与血清基质金属蛋白酶水平的变化及其意义

目的：观察急性冠脉综合征（ACS）患者可溶性CD40配体（sCD40L）及血清基质金属蛋白酶-9（MMP-9）、血清组织金属蛋白酶抑制物-1（TIMP-1）水平变化及其相关性。方法：采用酶联免疫吸附法测定70例冠心病患者[ACS患者35例、稳定型心绞痛（SAP）患者35例]、35例非冠心病患者（正常对照组）sCD40L、MMP-9、TIMP-1的水平。结果：与正常对照组及SAP组比较,ACS组sCD40L[（2.73±0.92）μg/ml比（3.05±0.98）μg/ml比（4.72±1.15）μg/ml]、MMP-9[（152.38±54.22）ng/ml比（341.12±69.96）ng/ml比（574.2±139.20）ng/ml]水平明显升高（P均〈0.01）,而TIMP-1[（415.92±13.96）ng/ml比（249.32±36.80）ng/ml比（172.20±40.10）ng/ml]水平明显降低（P〈0.01）;且MMP-9与sCD40L呈正相关（r=0.42,P〈0.05）。结论：急性冠脉综合征患者可溶性CD40配体、血清基质金属蛋白酶-9水平升高,血清组织金属蛋白酶抑制物-1水平下降提示这两指标与粥样斑块不稳定相关,可作为判断粥样斑块不稳定的血清学指标。     

Diagnostic potential of serum matrix metalloproteinase-2 and tissue inhibitor of metalloproteinase-1 as non-invasive markers of hepatic fibrosis in patients with HCV related chronic liver disease

As chronic liver disease progresses, an imbalance occurs between synthesis and breakdown of extracellular matrix (ECM). Matrix metalloproteinases (MMPs) are involved in degrading ECM while tissue inhibitors of metalloproteinases (TIMPs) prevent their fibrolytic action. In the present study, serum levels of matrix metalloproteinase-2 (MMP-2) and tissue inhibitor of metalloproteinase-1 (TIMP-1) were investigated as non-invasive parameters for the diagnosis of hepatic fibrosis in patients with HCV related chronic liver disease. Their diagnostic potential was evaluated in comparison to hepatic histology and standard liver function tests. A sandwich enzyme immunoassay technique was used to study circulating values of MMP-2 and TIMP-1 in forty-one patients with HCV antibodies in their sera (27 patients with biopsy ascertained chronic hepatitis C and 14 patients with histologically proven liver cirrhosis. Hepatic histology was evaluated using the hepatitis-activity-index according to Ishak et al. (1995), quantifying separately inflammatory activity and fibrosis. Ten healthy individuals were also included in the study as controls. Serum levels of MMP-2 were similar in controls and in chronic hepatitis C patients with (n = 15) and without (n = 12) fibrosis, but increased significantly in cirrhosis. TIMP-1 serum values showed a steady increase from normal controls to chronic hepatitis C without fibrosis, hepatitis C with fibrosis, and cirrhosis. The diagnostic potential of MMP-2 to detect fibrosis was low with a sensitivity of 7% and a diagnostic efficiency of 56%. The diagnostic potential of circulating MMP-2 to detect cirrhosis was higher with a sensitivity of 83% and a specificity of 96% resulting in a diagnostic efficiency of 92%. Serum TIMP-1 values detected fibrosis with a sensitivity of 67% and a specificity of 69% resulting in an efficiency rate of 70%. TIMP-1 values detected cirrhosis with 100% sensitivity but only 75% specificity. The diagnostic potential of circulating TIMP-1 was higher than that of serum ALT, AST or albumin values. In conclusion, serum values of MMP-2 and TIMP-1 are able to detect cirrhosis with a high sensitivity. Moreover, TIMP-1 values can detect fibrosis with comparable efficiency. Regular determinations of both TIMP-1 and MMP-2 in patients with chronic hepatitis C may be used as indicators of increasing fibrosis and the development of cirrhosis.     

MMP-9、TIMP-1在胃溃疡组织中的表达及与组织学的关系

目的研究基质金属蛋白酶-9(MMP-9)及其组织抑制物-1(TIMP-1)在胃溃疡组织的表达及其与组织学的相关性,探讨胃溃疡愈合的分子机制。方法 50例胃溃疡患者与20例正常对照者,经胃镜检查取胃溃疡部位及胃窦部位活检组织,并检测幽门螺杆菌感染,按悉尼标准进行组织学评价,进行组织培养并检测培养液上清MMP-9、TIMP-1浓度,分析MMP-9、TIMP-1与组织学的关系。结果 MMP-9、TIMP-1在胃溃疡部位[(51.6±20.3)mg/mL、(31.5±6.7)mg/mL]的表达高于对照组[(23.1±12.5)mg/mL、(16.2±5.3)mg/mL,P=0.001、P=0.000],且与组织学的活动性及炎症分级相关(P<0.05),而与萎缩、肠上皮化生分级等无相关性(P>0.05)。结论胃溃疡患者MMP-9、TIMP-1的表达增加,可能与胃溃疡的愈合有关。     

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.     

基质金属蛋白酶与冠状动脉斑块稳定性相关研究

目的 :探讨基质金属蛋白酶 1(MMP 1)、基质金属蛋白酶抑制剂 1(TIMP 1)、TIMP 1/MMP 1与冠状动脉 (冠脉 )粥样硬化斑块稳定性的相关性。方法 :以冠脉血管内超声检出冠脉粥样硬化斑块的软硬特性 ,将急性冠脉综合征患者分为不稳定斑块组 (n =2 2 )和稳定斑块组 (n =12 )。测定两组间血浆MMP 1、TIMP 1浓度 ,并与冠脉血管内超声测定的斑块大小、斑块纤维帽厚度、脂核或无回声带大小、脂核或无回声带与斑块比及面积狭窄率进行相关性分析。结果 :在冠状静脉窦血和外周血中 ,不稳定斑块组MMP 1浓度明显大于稳定斑块组 (P <0 0 1) ,TIMP 1/MMP 1明显小于稳定斑块组 (P <0 0 0 1) ,有非常显著性差异。血浆MMP 1浓度与纤维帽厚度呈负相关 ,与脂核或无回声带面积、脂核与斑块比和面积狭窄率呈正相关 ,与斑块大小无关。TIMP 1/MMP 1与纤维帽厚度、面积狭窄率呈正相关 ,与脂核或无回声带面积、脂核与斑块比呈负相关。结论 :MMP 1和TIMP 1/MMP 1与冠脉斑块不稳定性呈密切相关 ,可望作为冠脉斑块不稳定性的参考指标。     

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。