厄贝沙坦对糖尿病大鼠肾皮质MMP-2、MMP-9表达的影响

目的探讨厄贝沙坦对糖尿病（DM）大鼠肾皮质基质金属蛋白酶2（MMP-2）、基质金属蛋白酶9（MMP-9）表达的影响。方法将30只雄性SD大鼠随机分为正常对照组、DM组及厄贝沙坦治疗组,用免疫组化法检测三组肾皮质MMP-2、MMP-9表达;并用光镜、透射电镜观察其肾皮质病理改变。结果DM组肾皮质MMP-2、MMP-9表达明显低于对照组（P〈0．01）,出现典型的糖尿病肾病（DN）病理改变。治疗组MMP-2、MMP-9表达明显高于DM组（P〈0．01）,其DN病理改变好转。结论厄贝沙坦可能通过上调MMP-2、MMP-9表达,减少细胞外基质积聚,从而对DM大鼠起到肾脏保护作用。     

辛伐他汀对糖尿病大鼠MMP-9表达的影响及对肾脏保护的研究

目的 观察辛伐他汀对糖尿病大鼠肾脏的保护作用及其对肾组织基质金属蛋白酶-9(MMP-9)mRNA表达和尿MMP-9排泄的影响.方法 将Wistar大鼠随机分为正常对照组、糖尿病组、辛伐他汀治疗组.检测各组第8周血糖、HbA1c、12 h尿视黄醇结合蛋白(RBP)、尿白蛋白(albumin,ALB)和尿MMP-9排泄率,第8周留取肾脏标本做电镜观察及采用逆转录PCR(RT-PCR)检测MMP-9mRNA.结果 ①第8周,糖尿病组及辛伐他汀治疗组尿ALB、RBP、MMP-9排泄率均高于正常对照组(P＜0.01),辛伐他汀治疗组较糖尿病组有明显减少(P＜0.01);尿MMP-9排泄率与尿ALB和RBP排泄率呈正相关关系.②第8周,与正常对照组相比,糖尿病组大鼠肾脏MMP-9mRNA表达明显上调(P＜0.01),而辛伐他汀治疗组MMP-9mRNA表达则较糖尿病组明显下降(P＜0.01).电镜下辛伐他汀治疗组肾脏病理改变较糖尿病组明显减轻,同正常对照组相比仅有少量病变.结论 辛伐他汀对糖尿病大鼠具有确切的肾脏保护作用,部分与其抑制肾脏MMP-9过度表达有关.     

解聚复肾宁对糖尿病大鼠肾组织基质金属蛋白酶-9、金属蛋白酶组织抑制剂-1表达的影响

目的观察解聚复肾宁(JJFSN)对糖尿病(DM)大鼠肾组织基质金属蛋白酶-9(MMP-9)、金属蛋白酶组织抑制剂-1(TIMP-1)表达及肾脏保护作用机制。方法建立STZ诱导的DM SD大鼠模型,将成模DM大鼠随机分成4组:模型组、JJFSN组、厄贝沙坦组、JJFSN+厄贝沙坦组,同时设正常对照组。各组大鼠采用相应的干预措施处理12 w。检测各组大鼠第12周时肾重/体重、血糖、尿素氮、血肌酐、尿白蛋白排泄率(UAER),免疫组化法检测肾组织MMP-9、TIMP-1表达,透射电镜观察肾脏超微结构。结果模型组肾脏超微结构改变明显,血糖、UAER、尿素氮、血肌酐、肾重/体重显著增高。模型组大鼠肾组织TIMP-1的表达较正常对照组明显上调(P<0.01),JJFSN组、厄贝沙坦组、JJFSN+厄贝沙坦组肾组织TIMP-1表达明显下调(P<0.01),但仍高于正常对照组(P<0.01),JJFSN+厄贝沙坦组下调最明显(P<0.01)。DM模型组大鼠肾组织MMP-9的表达较正常对照组明显下调(P<0.01),解聚复肾宁组、厄贝沙坦组、解聚复肾宁+厄贝沙坦组肾组织MMP-9表达明显上调(P<0.01),但仍低于正常对照组(P<0.01),解聚复肾宁+厄贝沙坦组上调最明显(P<0.01)。结论 MMP-9、TIMP-l的表达变化与肾小球细胞外基质(ECM)降解减少相关,可能促进了糖尿病肾病(DN)的发生,JJFSN可能通过干预这种表达变化,减缓DN的发生和发展。     

灵芝多糖对糖尿病大鼠肾组织MMP-2和TIMP-2表达的影响

目的观察基质金属蛋白酶-2（MMP-2）、基质金属蛋白酶抑制因子-2（TIMP-2）在糖尿病大鼠肾组织中的表达及灵芝多糖干预后的影响。方法腹腔注射链脲佐菌素（STZ）诱导制备糖尿病大鼠模型，分组给予不同剂量灵芝多糖（GLP，100、200、400mg／kg）进行治疗性灌胃。8w后，免疫组化和RT-PCR方法雄测各组大鼠肾皮质MMP-2、TIMP-2的表达。结果糖尿病组大鼠肾小球MMP-2的表达较正常对照组明显减少，TIMP-2明显升高（P〈0．01）；灵芝多糖各组较糖尿病组MMP-2表达升高（P〈0．01），TIMP-2表达减少（P〈0．01）。结论灵芝多糖通过调节MMP-2／TIMP-2的平衡，减少细胞外基质积聚，对糖尿病大鼠肾脏起保护作用。     

罗格列酮对糖尿病大鼠肾组织TGF-β1、MMP-2及Col-Ⅳ的影响

目的研究罗格列酮早期干预对STZ诱导的糖尿病大鼠肾皮质TGF-β1、MMP-2及Col-Ⅳ表达影响。方法40只雄性SD大鼠随机分为正常对照组(C组)、糖尿病组(DM组,链脲佐菌素60mg/kg腹腔注射)、糖尿病罗格列酮治疗组(DR组,4mg·kg-1·d-1罗格列酮无菌水混悬液灌胃),10w后观察大鼠HbA1c,肾功能、肾指数、尿微量白蛋白及肾病理学变化,透射电镜观察肾超微结构改变,免疫组化法观察肾皮质TGF-β1、MMP-2及Col-Ⅳ表达变化。结果DM组尿素氮、肾指数、尿微量白蛋白及肾皮质TGF-β1、Col-Ⅳ表达显著高于C组(P<0·01),DR组较DM组明显减低(P<0·01);同时观察到DM组、DR组MMP-2较C组减低(P<0·01),而DR组较DM组显著升高(P<0·01);透射电镜观察DM组肾小球基底膜增厚、肾小球系膜细胞增生,经罗格列酮治疗后的DR组上述改变明显减轻。结论罗格列酮对糖尿病大鼠具有肾脏保护作用,其部分机制是通过下调肾皮质中TGF-β1、Col-Ⅳ蛋白表达,上调MMP-2表达。     

糖尿病肾病患者血清MMP-2水平检测及临床意义

目的 探讨血清基质金属蛋白酶-2(MMP-2)在糖尿病肾病(DN)发生、发展中的作用.方法 将60例2型糖尿病患者分为单纯组(单纯糖尿病)、非肾衰组(DN不伴慢性肾衰竭)、肾衰组(DN伴慢性肾衰竭)各20例,另选20例健康者作为对照组,采用ELISA法测定四组血清MMP-2水平.结果 三个糖尿病组MMP-2水平均较对照组降低,非肾衰组较肾衰组升高.结论 DN血清MMP-2水平下降与DN的发生及发展有关,MMP-2可能参与DN细胞外基质纤维化.     

硫化氢通过调控转化生长因子-β及基质金属蛋白酶-9/基质金属蛋白酶抑制剂-1改善糖尿病大鼠肾小管间质纤维化

目的探讨硫化氢(H_2S)气体信号分子对糖尿病大鼠肾小管间质纤维化及转化生长因子(TGF)-β、基质金属蛋白酶(MMP)-9/基质金属蛋白酶抑制剂(TIMP)-1表达的影响。方法单次腹腔注射链脲佐菌素(STZ)建立糖尿病模型将成年雄性SD大鼠64只随机分为正常对照组(Control组)、STZ组、STZ+H_2S组、H_2S组。造模72 h后采尾静脉血检测,若血糖>16.7 mmol/L表明造模成功。H_2S组和STZ+H_2S组大鼠腹腔注射Na HS溶液100μmol·kg~(-1)·d~(-1),Control组和STZ组腹腔注射同等量生理盐水。8 w后取标本,Masson染色观察大鼠肾脏组织病理形态学改变,Western印迹检测大鼠肾脏TGF-β、MMP-9、TIMP-1、Ⅳ型胶原蛋白的表达水平。结果与Control组相比,STZ组存在明显肾小管间质纤维化,同时肾脏组织中Ⅳ型胶原、TGF-β、TIMP-1蛋白的表达升高,MMP-9蛋白的表达水平下降(P<0.05);与STZ组大鼠相比,STZ+H_2S组肾小管间质纤维化减轻,肾组织TGF-β、TIMP-1、Ⅳ型胶原蛋白的表达降低,MMP-9蛋白表达水平升高(P<0.05)。结论 H_2S可改善糖尿病大鼠肾小管间质纤维化,其机制可能与调控MMP-9/TIMP-1失衡以及TGF-β蛋白的表达水平有关。     

糖尿病大鼠肾脏组织TGF-β1和MMP-2的表达及丹红注射液的干预作用

目的探讨糖尿病大鼠肾脏组织中转化生长因子(TGF)-β1和基质金属蛋白酶(MMP)-2的表达及丹红注射液的干预作用。方法 48只8周龄雄性SD大鼠中随机抽取12只为正常对照组,剩余为造模组。用腹腔注射链脲佐菌素(55 mg/kg)的方法造模,正常对照组按等量腹腔注射枸橼酸缓冲液,造模成功后分为糖尿病对照组、丹红注射液干预组以及二甲双胍治疗组,每组12只,药物干预共持续8 w,在8 w后测定大鼠体重,其中正常对照组以及糖尿病对照组在实验过程中每日腹腔注射蒸馏水2 ml/kg,丹红注射液干预组每日腹腔注射丹红注射液2 ml/kg,二甲双胍治疗组用蒸馏水配制的(300 mg/kg)灌胃;大鼠麻醉后从腹主动脉采集血液标本检测空腹血糖(FPG)、总胆固醇(TC)、甘油三酯(TG)、尿素氮(BUN)、血肌酐(SCr)水平;用代谢笼收集大鼠24 h尿量,用全自动生化分析仪检测大鼠尿蛋白,采用HE染色观察肾组织的病理变化;实时定量PCR检测肾组织中TGF-β1和MMP-2 mRNA表达;免疫组化检测肾组织中TGF-β1和MMP-2的蛋白表达。结果实验至第8周末,三组造模组大鼠的体重均低于正常对照组,而造模组之间体重差异无统计学意义(P>0.05)。造模组大鼠的FPG较正常对照组明显升高(P<0.05);造模组大鼠的TC、TG、BUN、SCr水平较正常对照组明显升高,其中丹红注射液干预组及二甲双胍治疗组大鼠的TC、TG较糖尿病对照组明显降低(P<0.05);HE染色发现造模组大鼠的肾小球肥大增生,肾小囊的囊腔缩小,其中丹红注射液干预组和二甲双胍治疗组大鼠肾组织病变的程度较糖尿病对照组有改善;造模组大鼠24 h尿量明显高于正常对照组,但是造模组之间差异无统计学意义(P>0.05);尿蛋白较正常对照组明显升高(P<0.05),其中丹红注射液干预组和二甲双胍治疗组大鼠较糖尿病对照组明显下降;造模组大鼠肾组织中TGF-β1 mRNA及蛋白水平较正常对照组明显增高,而丹红注射液干预组及二甲双胍治疗组中TGF-β1的表达量相对糖尿病对照组减少(P<0.05);造模组大鼠肾组织中的MMP-2 mRNA及蛋白水平较正常对照组明显降低,而丹红注射液干预组及二甲双胍治疗组中MMP-2相对糖尿病对照组增加(P<0.05)。结论 DN的发生发展可能与TGF-β1的过度表达和MMP-2低表达有关,丹红注射液可以通过抑制TGF-β1和促进MMP-2的表达改善糖尿病大鼠肾功能。     

脑出血大鼠脑水肿与血肿周围组织MMP-2、MMP-9表达的相关性

目的 探讨大鼠实验性脑出血后脑水肿与基质金属蛋白酶-2(MMP-2)、基质金属蛋白酶-9(MMP-9)表达的关系.方法 42只健康雄性Wistar大鼠采用自体血注入法建立右侧基底节区脑出血模型,随机分为脑出血模型组、假手术对照组,分别于造模后6h、12h、24 h、3d、5d、7d、14 d七个时间点取脑组织测定含水量,免疫组化检测MMP-2、MMP-9的表达.结果 模型组脑组织含水量在12h、24 h、3d、5d、7d时间点高于对照组(P＜0.05);模型组MMP-9表达在12h、24 h、3d、5d、7d时间点高于对照组(P ＜0.05);MMP-2自24 h开始表达,7d达高峰,14d仍有较高表达,在对照组无表达,模型组脑组织的重量变化与MMP-9的表达呈正相关,与MMP-2的表达呈负相关(P＜0.05).结论 大鼠脑出血后血肿周围脑组织MMP-9的表达与脑水肿相关,MMP-2的表达与神经损伤修复相关.     

鲤鱼汤对阿霉素肾病大鼠肾脏MMP-2和TIMP-2表达的影响

目的探讨鲤鱼汤对阿霉素肾病的治疗作用及机制。方法选择40只Wistar大鼠,随机取10只作为对照组;其余30只尾静脉注射阿霉素6.2 mg/kg制作阿霉素肾病模型后随机分为模型组、厄贝沙坦组及鲤鱼汤组各10只。鲤鱼汤组以300%鲤鱼汤9 mL/kg灌胃,厄贝沙坦组以厄贝沙坦50 mg/kg灌胃,模型组及对照组以9mL/kg饮用水灌胃,均1次/d。每周收集一次12 h尿液,测尿蛋白定量。干预8周后处死大鼠,检测血清总蛋白(TP)、白蛋白(ALB)、尿素氮(BUN)、肌酐(Cr)水平,取肾组织行HE染色观察病理改变,免疫组化法检测肾组织基质金属蛋白酶-2(MMP-2)和基质金属蛋白酶抑制剂-2(TIMP-2)表达。结果与对照组比较,模型组MMP-2与TIMP-2表达均降低,BUN、Cr升高,TP、ALB降低(P均<0.05),出现肾小管损害、肾小球体积增大;与模型组比较,鲤鱼汤组MMP-2和TIMP-2表达增加,肾小球截面积、肾小球体积及肾小管损害率降低,BUN、Cr降低,TP、ALB升高(P均<0.05)。结论鲤鱼汤对降低尿蛋白、缓解肾小球细胞外基质蓄积及肾脏纤维化有积极作用。其机制可能为调节MMP-2/TIMP-2平衡。     

Expression of MMP-2, MMP-9 and MMP-11 in dermatofibroma and dermatofibrosarcoma protuberans

Dermatofibroma (DF) and dermatofibrosarcoma protuberans (DFSP) are the spindle cell mesenchymal neoplasms of the dermis and subcutis. Their histogenesis still remains uncertain and controversial. Traditionally, CD34 and factor XIIIa or other markers have been widely used to distinguish these two diseases. However, the results of these markers reveal overlapping and they lack specificity. Formalin-fixed, paraffin-embedded blocks were collected from the biopsied cases in Kaohsiung Medical University Hospital in Taiwan between 2004 and 2006. This study included 19 cases of DF and 17 cases of DFSP. Immunohistochemical analysis using antibodies CD34, matrix metalloproteinases (MMP)-2, MMP-9, and MMP-11 was performed. We found that the expression of CD34, MMP-2 and MMP-11 shows significant statistical differences in Immunohistochemistry (IHC) study positive or negative reactivity (positive of CD34 in DFSP and positive of MMP-2 and MMP-11 in DF; p = 0.03, p < 0.001, and p < 0.001, respectively) between DF and DFSP. The result for expression of MMP-9 reveals no differences. The results indicate that the pathogenesis of DF and DFSP are affected by different expressions of extracellular matrix proteins. Metalloproteinases may play a direct role in these two diseases. Since no single marker can completely distinguish DF from DFSP, a combination of more than two or three stains may elevate the accuracy of diagnosis.     

Polymorphisms in the promoter regions of MMP-2, MMP-3, MMP-9 and MMP-12 genes as determinants of aneurysmal coronary artery disease

OBJECTIVES: Our hypothesis was that functional polymorphisms in matrix metalloproteinase (MMP) genes may act as susceptibility factors for the development of coronary aneurysms (CAs). BACKGROUND: Different forms of remodeling have been described at the level of coronary arteries; CA, reported in 1% to 5% of patients with angiographic evidence of coronary artery disease (CAD), are one of them. Matrix metalloproteinases have been implicated in the pathogenesis of aneurysm development through increased proteolysis of extracellular matrix proteins. METHODS: We screened 3,862 patients who underwent coronary angiography and identified 113 patients with CAD with at least one CA (CA group); these patients were matched with 226 patients with CAD without CA (control group). The -1,306 C/T MMP-2, 5A/6A MMP-3, CA-repeat MMP-9 and -82 A/G MMP-12 polymorphisms were determined. RESULTS: The MMP-2, MMP-9 and MMP-12 polymorphisms were not associated with CA. By contrast, the 5A/5A genotype of MMP-3 was significantly more frequent in the CA group than in the control group (31% vs. 18%, p = 0.015); similarly, the MMP-3 5A allele was more frequent in the CA group (p = 0.009). Three variables were independently associated with CA: the MMP-3 5A/5A genotype (odds ratio [OR] = 2.23, 95% confidence interval [CI] [1.27 to 3.93]), a previous myocardial infarction (OR = 1.91, 95% CI [1.14 to 3.20]) and a history of aortic aneurysm (OR = 21.06, 95% CI [2.35 to 188]). CONCLUSIONS: The MMP-3 5A allele is associated with the occurrence of CA. Our results suggest that an increased proteolysis in the arterial wall may act as a susceptibility factor for the development of CA in patients with coronary atherosclerosis.     

Expression levels and association of gelatinases MMP-2 and MMP-9 and collagenases MMP-1 and MMP-13 with VEGF in synovial fluid of patients with arthritis

This study was performed to provide evidence, albeit indirectly, as to which matrix metalloproteinases (MMPs), among the gelatinases MMP-2 and MMP-9 and the collagenases MMP-1 and MMP-13, play a more proactive role in the angiogenic process in arthritic joint. Joint fluid was collected from 33 patients with rhuematoid arthritis (RA) and osteoarthritis (OA), and protein (MMPs and vascular endothelial growth factor (VEGF)) levels were measured by ELISA, and the association of MMPs with VEGF was evaluated in joint fluid of patients with RA or OA. The levels of collagenases (total MMP-1 and total MMP-13) and gelatinases (total MMP-2 and total MMP-9) in RA joint fluid were significantly higher than those in OA fluid. Total MMP-9 levels were significantly associated with VEGF levels in RA fluids, but not in OA fluid, while total MMP-13 levels were strongly associated with VEGF levels in both RA and OA fluid. However, total MMP-2 and total MMP-1 levels were not associated with VEGF levels in either RA or OA joint fluid. Our results indirectly suggest that in RA and OA, MMP-9 and MMP-13 may play a more important role in angiogenesis than MMP-2 and MMP-1.     

结肠癌组织中MMP-7、MMP-9的表达及意义

目的观察结肠癌组织中基质金属蛋白酶（MMP）-7、MMP-9的表达，探讨其在结肠癌浸润、转移中的作用。方法采用免疫组化SP法检测50例结肠癌及其切缘组织中MMP-7、MMP-9的表达。结果肿瘤组织中MMP-7、MMP-9阳性表达率分别为68．00％和82．00％，标本切缘组织中分别为0和24．00％，两者相比，P均〈0．05，MMP-7、MMP-9在有淋巴结转移者中的阳性表达率为86．96％和91．30％，显著高于无淋巴结转移者的51．85％和74．07％，P均〈0．05；MMP-7、MMP-9在结肠癌组织中的表达呈正相关，r=0．84，P〈0．05。结论MMP-7、MMP-9高表达可能与结肠癌的浸润、转移有关。     

MMP-7、MMP-13在直肠癌中的表达及临床意义

目的研究直肠癌中MMP-7和MMP-13的表达情况,探讨它们与直肠癌侵袭和转移的关系及临床意义.方法对60例直肠癌、22例癌旁正常组织进行MMP-7和MMP-13免疫组化染色.结果MMP-7在癌组织中表达明显高于癌旁正常组织,二者之间差异显著(P＜0.01);MMP-13在癌旁正常组织中无表达,MMP-13在直肠癌细胞和间质细胞中均有阳性表达,但主要在间质细胞中表达.MMP-7表达与肿瘤分化程度、Dukes分期及淋巴结转移呈正相关(P＜0.05),MMP-13表达与肿瘤分化程度、Dukes分期及淋巴结转移无相关性(P＞0.05).结论直肠癌组织中MMP-7的表达与肿瘤进展有一定关系,可被视为一种反映直肠癌生物侵袭性的有价值的标志物,MMP-13可能参与了间质成分较强的降解反映过程,从而使肿瘤更易侵袭和转移.     

Enhanced production of MMP-1, MMP-3, MMP-13, and RANTES by interaction of chondrocytes with autologous T cells

It has been reported that T cells and chondrocytes interact through cell surface molecules such as MHC, CD4 or CD8 in osteoarthritis (OA) and T cells are activated. The objective of this study is to investigate the responses of chondrocyte–T cell interaction in terms of metalloprotease (MMP) and chemokine production. Articular cartilage and autologous blood were obtained from patients with OA and fracture who under went prosthetic surgery. Synovial fluid (SF) was collected from OA patients. Isolated chondrocytes were co-cultured with autologous T cells. SF cells were analyzed by immunostaining or Alcian blue staining. The production of MMP-1, MMP-3, MMP-13, and regulated on activation, normal T expressed and secreted (RANTES) was enhanced by direct co-culture compared to indirect co-culture using Transwell. Production ratio of RANTES in OA was significantly higher than non-arthritic samples. CD3 positive mononuclear cells and chondrocyte-like cells were found in SF. Chondrocyte–T cell contact was more adhesive in OA samples. These results showed the production of MMPs and RANTES was enhanced by the interaction and that chondrocyte–T cell contact was possible in vivo.     

实验性肝纤维化时MMP—1,TIMP—1的表达与Ⅰ,Ⅲ型胶原含量？…

为了观察实验性肝纤维化时ＭＭＰ－１、ＴＩＭＰ－１的表达与Ⅰ、Ⅲ型胶原含量变化之间的关系，本文制备了免疫性大鼠肝纤维化模型，运用定量ＲＴ－ＰＣＲ检测肝脏内ＭＭＰ－１、ＴＩＭＰ－１的表达，通过免疫组化检测肝组织中Ⅰ、Ⅲ型胶原的含量。运用相关理论作统计学分析。结果发现在肝纤维化发生时，Ⅰ型胶原和Ⅲ型胶原含量的变化有显著相关性；ＭＭＰ－１的表达在肝纤维化组与正常对照组之间未见显著差异，与Ⅰ、Ⅲ型胶原的含量