早期强化他汀治疗对急性冠脉综合征患者血清中MMP-8及TIMP-1水平的影响

目的：探讨早期强化他汀治疗对急性冠脉综合征（ACS）患者血清中基质金属蛋白酶8（MMP-8）和组织抑制因子1（TIMP-1）水平的影响。方法：ACS患者148例,随机分为常规他汀组（阿托伐他汀20 mg/d）和强化他汀组（阿托伐他汀40mg/d）,治疗1月后观察两组治疗前后MMP-8和TIMP-1水平的变化。结果：两组治疗后血清中MMP-8均下降,强化组下降明显（P〈0.05）,而TIMP-1均有升高,强化组上升显著（P〈0.05）。结论：早期大剂量应用阿托伐他汀治疗可降低ACS患者血清MMP-8水平和升高TIMP-1水平,抑制炎性反应,促进斑块的稳定。     

犬快速肺静脉起搏心房颤动模型中基质金属蛋白酶在肺静脉肌袖表达的实验研究

目的：探讨基质金属蛋白酶-9（MMP-9）和组织型基质金属蛋白酶抑止因子-1（TIMP-1）在持续性房颤发生和维持中的作用。方法：30只犬随机分为对照组和房颤组，建立犬快速肺静脉起搏持续性心房颤动模型。取组织标本，用RT—PCR和Western印记法分别检测各组MMP-9和TLMP-1mRNA和蛋白的表达情况。结果：与对照组相比，房颤组肺静脉肌袖组织MMP-9mRNA与蛋白质水平均增高（P均〈O．05），TIMP-1mRNA与蛋白质表达水平均降低（P均〈O．05）。结论：MMP-9／TIMP-1平衡失调可能是房颤时肺静脉肌袖细胞外基质重构的因素之一，参与了房颤的发生和维持。     

基质金属蛋白酶-9及其组织抑制物-1与子宫内膜异位症的相关性研究

目的研究基质金属蛋白酶-9（MMP-9）及其组织抑制物-1（TIMP-1）是否与子宫内膜异位症（EMs）有关。方法将11例EMs轻度和32例重度患者分别作为观察组1和2,41例卵巢畸胎瘤患者作为对照组。通过ELISA法测定腹水中MMP-9及TIMP-1值,比较各组两者及其比值的差异。结果与对照组比较,EMs轻度组MMP-9、TIMP-1差异无统计学意义（P〉0.05）,EMs重度组MMP-9、TIMP-1差异有统计学意义（P〈0.05）;3组的MMP-9/TIMP-1差异均有统计学意义（P〈0.05）;EMs轻度组与重度组相比较,MMP-9差异有统计学意义（P〈0.05）,TIMP-1差异无统计学意义（P〉0.05）。结论随着疾病的加重,MMP-9升高、TIMP-1降低、MMP-9/TIMP-1比值升高,MMP-9、TIMP-1与子宫内膜异位症发生、发展有相关性,特别是两者的比值,具有重要诊断价值。     

阿托伐他汀对急性冠脉综合征患者血清MMP-9及IL-18的影响

目的：探讨阿托伐他汀对急性冠脉综合征（acute coronary syndrome,ACS）患者血清基质金属蛋白酶-9（matrix metalloproteinase-9,MMP-9）、白介素-18（interleukin-18,IL-18）水平的影响。方法将ACS患者60例随机分为阿托伐他汀组（阿托伐他汀20 mg/d,连续用药14 d）和对照组（除未用阿托伐他汀外,余治疗同阿托伐他汀组）。药物治疗前及治疗14 d后检测血清MMP-9、IL-18水平。结果阿托伐他汀组治疗后MMP-9及IL-18[分别是（295±110） mg/L和（399±115） pg/ml]与治疗前[分别是（368±97） mg/L和（471±105） pg/ml]比较有下降,差异均有统计学意义（ P＜0．05）;阿托伐他汀组治疗后MMP-9及IL-18水平均明显低于同期对照组[分别是（358±95） mg/L和（466±109） pg/ml],差异有统计学意义（P＜0．05）。结论阿托伐他汀可降低ACS 患者血清MMP-9、IL-18水平,抑制斑块内炎性反应,促进斑块的稳定性。     

MEBO对糖尿病溃疡大鼠创面组织中MMP-9、MMP-2、TIMP-1、TIMP-2动态表达的影响

目的 探讨分析湿润烧伤膏（MEBO）对糖尿病溃疡大鼠创面组织中基质金属蛋白酶-9（MMP-9）、基质金属蛋白酶-2（MMP-2）、基质金属蛋白酶抑制剂-1（TIMP-1）及基质金属蛋白酶抑制剂-2（TIMP-2）表达水平的影响。方法 从160只健康雄性SD大鼠中随机选取120只制备大鼠糖尿病模型,其余40只正常喂养;最终选取90只造模成功大鼠随机分为模型组、MEBO组与bFGF组,每组30只,与此同时随机选取未予特殊处理的30只大鼠作为空白组,所有大鼠均做全层皮肤缺损创面,空白组与模型组大鼠创面予以凡士林油纱换药处理、MEBO组大鼠创面予以MEBO药纱换药处理、bFGF组大鼠创面予以重组牛碱性成纤维细胞生长因子（rb-bFGF）药纱换药处理,对比观察各组大鼠干预第4、6、12天时创面愈合率以及MMP-9、MMP-2、TIMP-1、TIMP-2与胶原蛋白水平变化情况。结果 （1）干预第4、6、12天,模型组大鼠创面愈合率均明显低于其他各组（P均＜0.05）,空白组大鼠创面愈合率均明显高于其他各组（P均＜0.05）,而MEBO组与bFGF组间无明显差异（P均＞0.05）。（2）干预第4、6、12天,模型组大鼠创面组织中MMP-9及MMP-2 mRNA表达水平均明显高于其他各组（P均＜0.05）,TIMP-1及TIMP-2 mRNA表达水平均明显低于其他各组（P均＜0.05）;除干预第6天MEBO组大鼠创面组织中TIMP-1 mRNA表达水平明显高于bFGF组（P＜0.05）外,其余各时间点MEBO组与bFGF组大鼠创面组织中MMP-9、MMP-2、TIMP-1及TIMP-2 mRNA表达水平均无明显差异（P均＞0.05）。（3）干预第4、6、12天,模型组大鼠创面组织中胶原蛋白水平明显低于其他各组（P均＜0.05）;除干预第4天MEBO组大鼠创面组织中胶原蛋白水平明显高于bFGF组（P＜0.05）外,其余各时间点MEBO组与bFGF组大鼠创面组织中胶原蛋白水平均无明显差异（P均＞0.05）。结论 MEBO可通过调控糖尿病溃疡大鼠创面组织中MMP-9、MMP-2、TIMP-1、TIMP-2的表达水平改善胶原蛋白过度降解,维持细胞外基质代谢平衡,进而促进创面愈合,调节MMP-9/TIMP-1、MMP-2/TIMP-2的比例失衡可能是其促进糖尿病溃疡创面愈合的作用靶点。     

阿托伐他汀对急性冠脉综合征血脂、基质金属蛋白酶-8和组织抑制因子-1的影响

目的探讨阿托伐他汀对急性冠脉综合征(ACS)患者血脂、基质金属蛋白酶-8(MMP-8)和组织抑制因子1(TIMP-1)表达的作用。方法选择ACS患者134例,按治疗方法不同分为按常规治疗的对照组和在常规治疗基础上加用阿托伐他汀的治疗组。观察两组治疗前后血脂、MMP-8和TIMP-1的变化。结果治疗4周后,两组治疗前后血脂中仅治疗组治疗后TG下降明显(P<0.05),其余变化均无统计学差异(P>0.05)。而与对照组比较,治疗组的血清MMP-8明显下降(P<0.05),而TIMP-1则明显升高(P<0.01)。结论阿托伐他汀可明显降低ACS患者血清MMP-8和升高TIMP-1值,这一作用可以减少炎性反应,稳定斑块和改善预后。     

人TIMP-1转基因小鼠肾组织内外源基因功能表型的鉴定

目的 对人基质金属蛋白酶组织抑制物-1（TIMP-1）转基因小鼠肾组织内外源人TIMP-1基因的功能表型进行鉴定,为深入研究TIMP-1在肾脏疾病进展过程中的病理生理作用奠定基础。方法 3月龄野生型小鼠（n=8,正常组）和hTIMP-1转基因小鼠（n=8）肾组织石蜡切片行PAS染色,观察肾脏组织结构变化。采用Northern杂交、Western印迹方法检测两组小鼠肾组织内h／mTIMP-1、mTIMP-1、TIMP-2、TIMP-3、MMP-9、MMP-2和COLⅣa5mRNA及蛋白质表达;明胶酶谱法检测MMP-2、MMP-9的活性。反向酶谱法检测TIMP-1的活性。结果 hTIMP-1转基因小鼠与正常组小鼠相比,肾组织结构未见显著变化。与正常组小鼠相比,hTIMP-1转基因小鼠肾组织内h／mTIMP-1mRNA、蛋白表达及活性显著升高（P＜0．05）;TIMP-2、MMP-2mRNA和蛋白表达降低（P＜0．05）;MMP-9的活性增高（P〈0．05）,而MMP-2的活性则降低（P＜0．05）。两组小鼠mTIMP-1、TIMP-3、MMP-9和COLIVa5的mRNA表达没有显著性差异（P＞0．05）。结论 外源基因在人TIMP-1转基因小鼠肾组织内稳定表达并导致MMPs／TIMPs系统发生代偿性变化。     

基质金属蛋白酶-9在腰椎间盘髓核组织中的表达

目的 检测腰椎间盘髓核组织中基质金属蛋白酶-9（MMP-9）的表达，进一步阐明椎间盘退变的机制。方法 利用RT-PCR和Western-Blot技术，对20例正常腰椎间盘髓核、45例退变腰椎间盘髓核的MMP-9进行了检测。结果 正常腰椎间盘组髓核内有一定量的MMP-9表达，退变腰椎间盘组髓核MMP-9mRNA、蛋白质表达水平升高，分别是正常组的1．86和1．65倍，存在差异（P〈0．05）。结论 MMP-9与腰椎间盘髓核退变关系密切。     

白介素-1β对人牙周膜成纤维细胞MMP-13表达影响的研究

目的 探讨白介素-1β（IL-1β）对人牙周膜成纤维细胞（hPDLFs）中基质金属蛋白酶-13（MMP-13）表达影响的研究.方法 体外分离培养hPDLFs并随机分为对照组和实验组,对照组中加入等量无血清培养液,实验组加入不同浓度IL-1β（0 ng/ml、0.5 ng/ml、5 ng/ml、10 ng/ml、20 ng/ml）作用hPDLFs 24 h.采用RT-PCR检测MMP-13 mRNA的表达情况,并选取最适浓度作用24 h,采用Western blot检测MMP-13蛋白表达的变化情况.结果实验组与对照组比较,MMP-13在IL-1β浓度为10 ng/ml和20 ng/ml时mRNA表达最为明显（P＜0.05）,10 ng/ml组和20 ng/ml组MMP-13 mRNA表达相比较,无明显差异（P＞0.05）.采用10 ng/ml IL-1β作为最适浓度进行刺激,并作用hPDLFs 24 h,与对照组比较,MMP-13蛋白表达显著增加,具有显著差异性（P＜0.05）.结论 在IL-1β调控下,hPDLFs中MMP-13的表达显著增加,并呈明显的浓度依赖性,而MMP-13表达的增加可能是引起正畸治疗过程中牙根吸收的重要机制之一.     

肺癌MMP-9和VEGF的表达及意义

目的探讨肺癌组织中基质金属蛋白酶-9（MMP-9）和血管内皮生长因子（VEGF）的表达及其意义。方法采用免疫组化S-P法检测20例癌旁正常肺组织、84例肺癌组织中MMP-9和VEGF的表达。结果肺癌组织MMP-9和VEGF表达显著高于癌旁正常肺组织（P〈0.01）。小细胞肺癌和腺癌MMP-9表达高于鳞癌（P〈0.01）。肺癌MMP-9表达有淋巴结转移者高于无淋巴结转移者（P〈0.01）,Ⅲ期和Ⅳ期高于Ⅰ期和Ⅱ期（P〈0.05）。肺癌VEGF表达有淋巴结转移者高于无淋巴结转移者（P〈0.05）,Ⅲ期和Ⅳ期高于Ⅰ期和Ⅱ期（P〈0.05）。肺癌MMP-9和VEGF的表达呈正相关（P〈0.05）。结论MMP-9和VEGF表达与肺癌侵袭转移密切相关。     

Matrix-Metallo-Proteinases and their tissue inhibitors in radiation-induced lung injury

PURPOSE: Remodeling of extracellular matrix (ECM) after lung damage depends on collagen degrading Matrix-Metallo-Proteinases (MMP) and their endogenous inhibitors (Tissue-Inhibitors of Metallo-Proteinases, TIMP). Transforming growth factor (TGF)-beta1 has been implicated in the pathogenesis of radiation-induced lung fibrosis upon its effects on fibroblast proliferation and collagen synthesis. Lung cancer patients have often elevated TGF-beta1 plasma levels as a result of increased TGF-beta1 expression in their tumours. On this background, we investigated the effect of irradiation on the MMP/TIMP system in the lung tissue of normal and transgenic TGF-beta1 mice, in which TGF-beta1 is overexpressed in the liver resulting in high TGF-beta1 plasma levels. MATERIAL AND METHODS: Transgenic (TG) and wild-type (WT) mice underwent thoracic irradiation with 12 Gy or sham-irradiation. For each study group (TG 12 Gy; TG 0 Gy; WT 12 Gy; WT 0 Gy) 8 mice were sacrificed at 4 and 8 weeks after (sham-) irradiation. The TGF-beta1, TIMP-1/-2/-3 expression in the lung tissue was quantified by Western blot; the MMP-2 and MMP-9 activity was analysed by zymography. The cellular origin of the MMP and TIMP was localised by immunohistochemistry. RESULTS: Irradiation had no influence on the TIMP-1/-2/-3, but increased significantly the MMP-2 /-9 expression. In the lung tissue of TG mice the TIMP-1/-2/-3 expression was elevated, the MMP-9 activity was decreased. The immunhistochemical study showed that parenchymal and inflammatory cells express these MMP/TIMP. CONCLUSION: Our results provide evidence that the overexpression of MMP-2 and MMP-9 is involved in the inflammatory response of radiation-induced lung injury. MMP-2 and MMP-9 are known to degrade collagen IV of basement membranes, therefore affecting the structural integrity of lung tissue. In contrast, in lung tissue of TG mice the TIMP-1/-2/-3 expression was up-regulated and the MMP-9 activity was diminished, thereby decreasing possibly the ECM degradation leading to lung fibrosis.     

川崎病患儿血清MMP-9与TIMP-1变化及其意义

目的:研究川崎病(KD)患儿血清基质金属蛋白酶-9(MMP-9)及其特异性组织抑制剂-1(TIMP-1)质量浓度的变化在预测发生冠状动脉病变(CAL)风险中的临床意义。方法:观察组为住院的KD患儿23例,静脉注射丙种球蛋白(IVIG)前后各抽取患儿外周静脉血1次,同时抽取20名正常体检儿童(正常对照组)外周静脉血。ELISA双抗体法测定血清MMP-9与TIMP-1质量浓度,用二维超声心动图观察心脏冠状动脉病变。结果:观察组患儿急性期血清MMP-9与TIMP-1质量浓度及MMP-9/TIMP-1比值均较正常对照组儿童显著增高(P<0.01);IVIG干预前CAL组患儿血清MMP-9质量浓度及血清MMP-9/TIMP-1显著地高于非CAL组患儿(P<0.01);IVIG干预后观察组患儿血清MMP-9质量浓度与MMP-9/TIMP-1显著降低(P<0.01);IVIG干预后CAL组患儿血清MMP-9质量浓度及血清MMP-9/TIMP-1仍显著高于非CAL组患儿(P<0.05)。结论:动态监测血清MMP-9与TIMP-1质量浓度和(或)MMP-9/TIMP-1比值对预测KD并发CAL具有重要临床意义。     

Expression levels of matrix metalloproteinase (MMP)-9 and its specific inhibitor TIMP-1, in septic and aseptic arthritis of the knee

Purpose

In cases of septic knee arthritis, there is excess of matrix metalloproteinases (MMPs) over tissue inhibitors of metalloproteinases (TIMPs), due to enhanced expression and activation that are induced by bacteria in comparison with rheumatic or degenerative arthritis. The aim of this study was to explore the expression levels of synovial gelatinase MMP-9 and its specific inhibitor TIMP-1 in septic and aseptic arthritis and their potential use as additional aids to clinical investigation.

Methods

Gelatin zymography and western blot analysis were applied in effusions from knees of the patients with septic (SA—10 patients), rheumatic (RA—10 patients) and osteoarthritis (OA—10 patients).

Results

Zymographic analysis revealed that all samples contained latent MMP-2 activity, albeit activated MMP-2 appeared in more of the septic than aseptic effusions. MMP-9 was not detected in osteoarthritic synovial fluid samples. Only trace amounts of MMP-9 activity were detected in 4 of 10 patients with RA, whereas higher MMP-9 levels were evident in all samples from SA (P = 0.0241). In immunoblotting assays, samples from SA showed significantly higher levels of MMP-9 compared with samples from RA (P = 0.0052), confirming zymographic results. Although no significant difference in TIMP-1 levels was observed, the estimated MMP-9/TIMP-1 ratio of septic effusions was significantly higher compared with aseptic ones (P = 0.0029).

Conclusions

The data presented suggest enhanced expression and activation of MMP-9 in septic native knee arthritis compared with aseptic. The presence of high levels of MMP-9 with concomitantly increased MMP-9/TIMP-1 ratio and activated gelatinases in effusions, independent of neutrophilic counts, may be indicative for infection.     

阿托伐他汀对老年大鼠心肌PPARβ/δ mRNA和MMP-9 mRNA表达水平的影响

目的:观察老年大鼠心肌PPARβ/δmRNA和MMP-9 mRNA表达情况及阿托伐他汀的影响。方法:30只20月龄Wister鼠,分为老年对照、大剂量和小剂量阿托伐他汀组。10只3月龄大鼠为青年对照。用RT-PCR检测大鼠心肌PPARβ/δmRNA和MMP-9 mRNA表达水平。结果:①老年大鼠PPARβ/δmRNA表达水平较青年组显著降低(P<0.01),阿托伐他汀可显著上调其表达(P<0.01);②老年大鼠MMP-9 mRNA表达水平较青年组显著增高(P<0.01),阿托伐他汀显著抑制其表达(P<0.01);结论:阿托伐他汀显著抑制老年大鼠心肌MMP-9 mRNA的表达,PPARβ/δ可能参与了这一过程。     

Matrix-Metallo-Proteinases and their tissue inhibitors in radiation-induced lung injury

Purpose: Remodeling of extracellular matrix (ECM) after lung damage depends on collagen degrading Matrix-Metallo-Proteinases (MMP) and their endogenous inhibitors (Tissue-Inhibitors of Metallo-Proteinases, TIMP). Transforming growth factor (TGF)-β1 has been implicated in the pathogenesis of radiation-induced lung fibrosis upon its effects on fibroblast proliferation and collagen synthesis. Lung cancer patients have often elevated TGF-β1 plasma levels as a result of increased TGF-β1 expression in their tumours. On this background, we investigated the effect of irradiation on the MMP/TIMP system in the lung tissue of normal and transgenic TGF-β1 mice, in which TGF-β1 is overexpressed in the liver resulting in high TGF-β1 plasma levels.

Material and methods: Transgenic (TG) and wild-type (WT) mice underwent thoracic irradiation with 12 Gy or sham-irradiation. For each study group (TG 12 Gy; TG 0 Gy; WT 12 Gy; WT 0 Gy) 8 mice were sacrificed at 4 and 8 weeks after (sham-) irradiation. The TGF-β1, TIMP-1/-2/-3 expression in the lung tissue was quantified by Western blot; the MMP-2 and MMP-9 activity was analysed by zymography. The cellular origin of the MMP and TIMP was localised by immunohistochemistry.

Results: Irradiation had no influence on the TIMP-1/-2/-3, but increased significantly the MMP-2 /-9 expression. In the lung tissue of TG mice the TIMP-1/-2/-3 expression was elevated, the MMP-9 activity was decreased. The immunhistochemical study showed that parenchymal and inflammatory cells express these MMP/TIMP.

Conclusion: Our results provide evidence that the overexpression of MMP-2 and MMP-9 is involved in the inflammatory response of radiation-induced lung injury. MMP-2 and MMP-9 are known to degrade collagen IV of basement membranes, therefore affecting the structural integrity of lung tissue. In contrast, in lung tissue of TG mice the TIMP-1/-2/-3 expression was up-regulated and the MMP-9 activity was diminished, thereby decreasing possibly the ECM degradation leading to lung fibrosis.     

激活HaCat细胞表面TLR促进细胞迁移的初步研究

目的观察长链游离脂肪酸对体外培养的角质形成细胞的作用,探讨其促进细胞迁移的机制。方法 (1)体外培养HaCat细胞。(2)免疫印迹法(Weston bloten)检测HaCat细胞表面TLR2、TLR4表达。(3)划痕实验法检测激活TLR对HaCat细胞迁移率的影响。(4)Real Time-PCR法分析N、PA、SA、LPS组MMP-3、MMP-9、TIMP-1的表达。结果 (1)HaCat细胞表面有丰富的TLR2、TLR4受体表达。(2)SA、LPS激活细胞表面TLR后可以明显促进细胞迁移,从而发挥促进创面愈合的作用。结论 SA、LPS可促进角质形成细胞迁移从而促进创面愈合;其机制可能为:SA作用于TLR促进细胞释放MMP-1、MMP-9、抑制TIMP-1表达等因素有关。     

雾化吸入γ-干扰素对放射性肺损伤重建的拮抗作用

目的 观察超声雾化吸入γ-干扰素(IFN-γ)对大鼠放射性肺损伤早期组织重建的拮抗作用,并初步探讨其作用机制。方法 将动物分为照射对照组和照射+IFN-γ拮抗组。于照前3d每日雾化吸入IFN-γ,分别于照后10、20和30d肺组织取材,制备石蜡切片,进行苏木素伊红(HE)、天狼猩红和α-平滑肌肌动蛋白(α-SMA)免疫组织化学染色;Western blot检测Ⅳ型胶原合成变化;ELISA检测MMP-2、-9和TIMP-1含量变化。结果 照射＋IFN-γ组与照射对照组比较,肺泡隔增宽程度明显减轻,Ⅰ、Ⅲ型胶原合成和α-SMA表达明显减少;照射后Ⅳ型胶原表达呈上升趋势,但IFN-γ吸入组较对照组为低;吸入IFN-γ10d可降低MMP-2和TIMP-1表达,而MMP-9表达升高;吸入30d 三者表达均下降。结论 IFN-γ对辐射引起的肺损伤具有明显的治疗作用,其可能的作用机制是IFN-γ降低TIMP-1表达,解除对MMP-9的抑制,进而降解Ⅳ型胶原,拮抗辐射引起的肺损伤后重建。