应用组织微阵列技术研究MMP-9 与TIMP-1在卵巢上皮性肿瘤中的表达及临床意义

 目的 研究基质金属蛋白酶-9（MMP-9）及其组织基质金属蛋白抑制剂-1（TIMP-1）在卵巢上皮性肿瘤中的表达及其临床意义。方法 应用组织微阵列技术结合免疫组化（S-P法）检测94例卵巢上皮性肿瘤组织中MMP-9和TIMP-1的表达。结果 卵巢癌组织和卵巢交界性肿瘤组织中MMP-9阳性表达率明显高于卵巢良性肿瘤（P〈0．01）；卵巢癌组织中TIMP-1阳性表达率明显高于卵巢良性肿瘤（P〈0．01）；MMP-9和TIMP-1表达与患者年龄、肿瘤大小和卵巢组织学类型均无明显相关性；在卵巢癌的病理分级中，MMP-9／TIMP-1比值随卵巢上皮性肿瘤恶性程度的增加明显增大。结论 MMP-9和TIMP-1在卵巢上皮性肿瘤的演进发展中起重要作用，二者可作为卵巢上皮性肿瘤恶性化的分子指标之一。组织微阵列是检测多样本组织的一种高效、低耗、可比性强的分子病理学研究工具。     

Differential regulation of MMP-9 and TIMP-2 expression in malignant melanoma developed in metallothionein/RET transgenic mice.

We recently established a metallothionein-I(MT)/RET transgenic mouse line in which skin melanosis, benign melanocytic tumor and malignant melanoma develop stepwise. Malignant melanoma cells but not benign melanocytic tumor cells had metastatic ability in transgenic mice. In the present study, we investigated the expression of several matrix metalloproteinases (MMPs) and tissue inhibitors of matrix metalloproteinases (TIMPs), including MMP-1, MMP-2, MMP-3, MMP-7, MMP-9, MT1-MMP, TIMP-1 and TIMP-2, in these tumors. Western and northern blot analyses revealed that malignant transformation of melanocytic tumors developed in MT/RET transgenic mice accompanied with upregulation of MMP-9 and downregulation of TIMP-2. Expression of other MMP and TIMP genes examined was very low or undetectable in both benign and malignant tumors. Since activation of MMP-9 in malignant tumors was detected by gelatin zymography, these results suggest that imbalance of expression of the MMP-9 and TIMP-2 genes might be associated with metastatic ability of melanoma cells developed in MT/RET transgenic mice.     

Expression of matrix metalloproteinase 2 (MMP-2), membrane-type 1 MMP and tissue inhibitor of metalloproteinase 2 and activation of proMMP-2 in pancreatic duct adenocarcinomas in hamsters treated with N-nitrosobis(2-oxopropyl)amine.

In order to assess the significance of changes in metalloproteinase activity in pancreatic carcinogenesis, the expression of matrix metalloproteinases 2 and 9 (MMP-2 and MMP-9, respectively), tissue inhibitor of metalloproteinase-1 (TIMP-1) and TIMP-2, and membrane-type 1 MMP (MT1-MMP) and MT2-MMP in ductal lesions in a rapid-production model for pancreatic duct carcinomas (PCs) in hamsters initiated with N-nitrosobis(2-oxopropyl)amine (BOP) and in subcutaneous transplantable tumors of hamster pancreatic duct carcinoma (HPDs) was investigated. Northern analysis revealed MMP-2, MMP-9, TIMP-2 and MT1-MMP mRNAs to be overexpressed in PCs. Immunohistochemically, elevated levels of MMP-2 were apparent in early duct epithelial hyperplasias and staining increased from atypical hyperplasias to carcinomas. Gelatin zymography demonstrated clear activation of proMMP-2 but not proMMP-9 in both of primary and HPD tumors, the MT1-MMP mRNA level and proMMP-2 activation being significantly correlated (r = 0.893, P < 0.001). In our rapid production model, 0.1 and 0.2% OPB-3206, an inhibitor of MMPs, given in the diet after two cycles of augmentation pressures for 48 days decreased the incidence and number of carcinomas. Gelatin zymography demonstrated that OPB-3206 inhibited activation of proMMP-2 in pancreatic cancer tissues. These results indicate that overexpression of MMP-2, TIMP-2 and MT1-MMP, and cell surface activation of proMMP-2 by MT1-MMP, are involved in the development of PCs, and that MMP-2 expression at the protein level appears in the early phase of pancreatic duct carcinogenesis. OPB-3206 may be a candidate chemopreventive agent for pancreatic ductal adenocarcinomas.     

基质金属蛋白酶及其抑制剂在乳腺癌中的表达及其临床意义

背景与目的:基质金属蛋白酶(matrixmetalloproteinase,MMP)与基质金属蛋白酶组织抑制剂(tissueinhibitorofmatrixmetalloproteinase,TIMP)的表达失平衡在肿瘤侵袭、转移过程中起重要作用,但与乳腺癌预后关系的报道少见。本研究探讨MMP-2、MMP-9和TIMP-1、TIMP-2的表达与乳腺癌侵袭、转移和预后的关系。方法:原位杂交、免疫组化检测66例有临床和随访资料的乳腺癌患者的MMP-2mRNA、TIMP-2mRNA和MMP-2、MMP-9、TIMP-1、TIMP-2蛋白表达。统计学分析采用χ2检验、Kaplan-Meier和Cox多因素回归分析。结果MMP-2mRNA、TIMP-2mRNA和MMP-2、MMP-9、TIMP-1TIMP-2蛋白的阳性表达率分别为66.7%(44/66)、65.2%(43/66)和71.2%(47/66)、68.2%(45/66)、40.9%(2766)、69.7%(46/66),其中MMP-2蛋白与MMP-2mRNAMMP-9蛋白及TIMP-2mRNA与TIMP-2蛋白的表达存在显著性正相关(P<0.01);TIMP-1与MMP-9蛋白表达呈负相关(P<0.01)。有淋巴结转移的乳腺癌中MMP-2、MMP-9蛋白表达显著高于无转移者,但TIMP-2mRNA、TIMP-1蛋白表达显著低于无转移者(P<0.05)。乳腺癌中MMP-2mRNA和MMP-9蛋白表达与肿块大小、生存状况有显著性相关(P0.05),此外,MMP-9蛋白表达与临床分期存在正相关性(P<0.01)。绝经和ER表达阴性患者的MMP-2mRNA表达水平增高(P<0.     

Expression of MMP-2, -7, -9, MT1-MMP and TIMP-1 and -2 has no prognostic relevance in patients with advanced epithelial ovarian cancer

Matrix metalloproteinases (MMPs) and their tissue inhibitors (TIMPs) are involved in tumor invasion, but their prognostic significance is still under discussion. We set out to analyze the epithelial and stromal expression of MMP-2, MMP-7, MMP-9, MT1-MMP, TIMP-1 and TIMP-2 in advanced epithelial ovarian cancers and to assess their prognostic value. A tissue microarray of malignant ovarian tumors from 69 patients was constructed. Immunostaining results were scored using the HSCORE and assessed by univariate analysis with Bonferroni correction and classical multidimensional scaling (CMDS). Kaplan-Meier survival curves calculated with regard to patient and tumor characteristics were compared by the log-rank test. Patients treated by primary surgery (n=43) had a higher tumor size and a trend toward higher epithelial MMP and TIMP expression than those treated by interval surgery (n=26). Optimal cytoreduction (residue ≤ 1 cm) was obtained in 27 and 18 patients, respectively. Clinical and histological characteristics were not different in patients with optimal cytoreduction and those with suboptimal cytoreduction. The expression of epithelial MMP-9 (P=0.002) and TIMP-2 (P=0.026) were higher in the latter group. CMDS failed to demonstrate any influence of MMP and TIMP expression with regard to cytoreduction outcome. MMP and TIMP expression did not influence survival. Their prognostic values were outweighed by histological type, lymph node involvement and cytoreduction. Standard statistical analysis adjusted after Bonferroni correction and CMDS reduced the relevance of MMPs and TIMPs in the prognosis of patients with advanced ovarian cancer.     

Differential Regulation of MMP-9 and TIMP-2 Expression in Malignant Melanoma Developed in Metallothionein/RET Transgenic Mice

We recently established a metallothionein-I(MT)/RET transgenic mouse line in which skin melanosis, benign melanocytic tumor and malignant melanoma develop stepwise. Malignant melanoma cells but not benign melanocytic tumor cells had metastatic ability in transgenic mice. In the present study, we investigated the expression of several matrix metalloproteinases (MMPs) and tissue inhibitors of matrix metalloproteinases (TIMPs) , including MMP-1, MMP-2, MMP-3, MMP-7, MMP-9, MT1– MMP, TIMP-1 and TIMP-2 , in these tumors. Western and northern blot analyses revealed that malignant transformation of melanocytic tumors developed in MT/RET transgenic mice accompanied with upregulation of MMP-9 and downregulation of TIMP-2. Expression of other MMP and TIMP genes examined was very low or undetectable in both benign and malignant tumors. Since activation of MMP-9 in malignant tumors was detected by gelatin zymography, these results suggest that imbalance of expression of the MMP-9 and TIMP-2 genes might be associated with metastatic ability of melanoma cells developed in MT/RET transgenic mice.     

基质金属蛋白酶-2及其抑制剂TIMP-2在卵巢浆液性肿瘤中表达的临床意义

 目的　探讨基质金属蛋白酶-2（MMP-2）及其抑制剂（TIMP-2）的表达与卵巢浆液性肿瘤侵袭和转移的关系。方法　应用流式细胞术（FCM）定量检测MMP-2和TIMP-2在45例卵巢浆液性肿瘤中的表达。结果　MMP-2和TIMP-2 在卵巢浆液性癌中的表达明显高于卵巢浆液性囊腺瘤,差异有统计学意义（P＜0.05）,且与卵巢浆液性癌组织分级和临床分期密切相关（P＜0.05）。MMP-2和TIMP-2在卵巢浆液性癌中的表达密切相关（P＜0.05）。结论　MMP-2和TIMP-2的高表达促进了卵巢浆液性癌的侵袭和转移,MMP-2和TIMP-2的表达有相关性。提示二者共同检测可作为诊断和预后的参考指标。     

Activation of matrix metalloproteinase-2 (MMP-2) by membrane type 1 matrix metalloproteinase through an artificial receptor for proMMP-2 generates active MMP-2

The suggested model for pro-matrix metalloproteinase-2 (proMMP-2) activation by membrane type 1 MMP (MT1-MMP) implicates the complex between MT1-MMP and tissue inhibitor of MMP-2 (TIMP-2) as a receptor for proMMP-2. To dissect this model and assess the pathologic significance of MMP-2 activation, an artificial receptor for proMMP-2 was created by replacing the signal sequence of TIMP-2 with cytoplasmic/transmembrane domain of type II transmembrane mosaic serine protease (MSP-T2). Unlike TIMP-2, MSP-T2 served as a receptor for proMMP-2 without inhibiting MT1-MMP, and generated TIMP-2-free active MMP-2 even at a low level of MT1-MMP. Thus, MSP-T2 did not affect direct cleavage of the substrate testican-1 by MT1-MMP, whereas TIMP-2 inhibited it even at the level that stimulates proMMP-2 processing. Expression of MSP-T2 in HT1080 cells enhanced MMP-2 activation by endogenous MT1-MMP and caused intensive hydrolysis of collagen gel. Expression of MSP-T2 in U87 glioma cells, which express a trace level of endogenous MT1-MMP, induced MMP-2 activation and enhanced cell-associated protease activity, activation of extracellular signal-regulated kinase, and metastatic ability into chick embryonic liver and lung. MT1-MMP can exert both maximum MMP-2 activation and direct cleavage of substrates with MSP-T2, which cannot be achieved with TIMP-2. These results suggest that MMP-2 activation by MT1-MMP potentially amplifies protease activity, and combination with direct cleavage of substrate causes effective tissue degradation and enhances tumor invasion and metastasis, which highlights the complex role of TIMP-2. MSP-T2 is a unique tool to analyze physiologic and pathologic roles of MMP-2 and MT1-MMP in comparison with TIMP-2.     

Clinical role of MMP-2/TIMP-2 imbalance in hepatocellular carcinoma.

An imbalance between the proteolytic activity of matrix metalloproteinase-2 (MMP-2) and the tissue inhibitor of MMP-2 (TIMP-2) is responsible for degradation of extracellular matrix (ECM) components and plays a critical role in tumor invasion and in metastasis formation. The occurrence of intra-hepatic metastasis, which severely affects prognosis and long-term survival, is commonly observed in the course of hepatocellular carcinoma (HCC). We investigated the expression of MT1-MMP in tissues, whereas both MMP-2 and TIMP-2 were evaluated in the sera and tissues (primary and metastatic nodules) of HCC patients with and without metastasis, whose clinical outcome was followed over a 2-year period. MT1-MMP expression was similar among primary nodule tissues of patients with and without metastasis. Serum and tissue levels of MMP-2 were not statistically different between patients with and without metastasis, but MMP-2 was concentrated at the invasive edge of the metastatic tissue. On the contrary, serum and tissue levels of TIMP-2 were significantly higher in HCC patients without metastasis than in those with. This situation was not only observed in the primary HCC tissues, but also in the metastatic nodules. These results correlate with the clinical outcome, because more than 90% of the patients with high levels of TIMP-2 were still alive after 2 years, whereas less than 30% with low levels of TIMP-2 had survived. Furthermore, we found a strict correlation between tissue and serum levels of TIMP-2, this suggesting that a MMP-2/TIMP-2 imbalance and in particular TIMP-2 levels, could represent an important prognostic factor in patients with HCC.     

应用组织微阵列技术分析甲状腺乳头状癌MMP-2、MMP-9、TIMP-1和TIMP-2表达

目的研究基质金属蛋白酶2，9（MMP-2，MMP-9）及其组织抑制剂1，2（TIMP—1，TIMP-2）在甲状腺乳头状癌组织中的表达与肿瘤侵袭转移的关系，探讨组织微阵列技术的可行性。方法采用组织微阵列技术结合免疫组织化学S—P法检测甲状腺乳头状癌组织MMP-2、MMP-9、TIMP-1和TIMP-2的表达。结果MMP-2、MMP-9、TIMP-1和TIMP-2在甲状腺乳头状癌组织中的阳性表达率分别为78．8％（82／104）、83．7％（87／104）、71．2％（74／104）和57．7％（60／104）。MMP-2和MMP-9阳性表达与肿瘤侵袭程度和淋巴结转移呈正相关（P〈0．05，P〈0．01）。TIMP-1和TIMP-2阳性表达与淋巴结转移呈负相关（P〈0．01，P〈0．05），与侵袭程度无明显相关性。MMP-9与TIMP-1表达有显著相关性，且呈负相关（P〈0．05）。结论甲状腺乳头状癌组织中MMP-2和MMP-9的高表达与TIMP-1和TIMP-2的相对低表达可能促进肿瘤的侵袭和转移。组织微阵列是检测多样本组织的1种高效、低耗、可比性强的分子病理学研究工具。     

Expression of integrin alpha(v)beta(3) correlates with activation of membrane-type matrix metalloproteinase-1 (MT1-MMP) and matrix metalloproteinase-2 (MMP-2) in human melanoma cells in vitro and in vivo

Activation of matrix metalloproteinase-2 (MMP-2) is mediated by binding to the complex of membrane-type matrix metalloproteinase-1 (MT1-MMP) with tissue inhibitor of MMP-2 (TIMP-2) on the cell surface. Binding of MMP-2 to integrin alpha(v)beta(3) has been implicated in presenting activated MMP-2 on the cell surface of invasive cells, but interactions with the MT1-MMP-TIMP-2 system have not been considered. Therefore, we studied the expression and interaction of MT1-MMP, MMP-2 and TIMP-2 in the alpha(v)beta(3)-negative melanoma cell line BLM and in its beta(3)-transfected, alpha(v)beta(3)-expressing counterpart BLM-beta(3), both on cell lines and in xenografts. Total expression levels of MMP-2, MT1-MMP and TIMP-2 did not differ markedly between the alpha(v)beta(3)-negative and alpha(v)beta(3)-positive cells. Remarkable differences, however, exist in the presence of active MMP-2 and MT1-MMP. Zymography on cell lysates revealed that active MMP-2 was restricted to alpha(v)beta(3)-positive cell line and clearly accumulated in xenografts derived from the BLM-beta(3) cells, confirming the relevance of this integrin for MMP-2 function. Western blotting of cell lysates showed that processing of proMT1-MMP to the activated form was enhanced in BLM-beta(3). The ratio of active and inactive MT1-MMP was 3-fold higher in the beta(3)-transfectants. Immunofluorescence double-labeling followed by confocal laser microscopy showed co-localization of MT1-MMP and alpha(v)beta(3) on BLM-beta(3) cells. In xenografts from BLM-beta(3) cells, active MT1-MMP was markedly increased. Our results demonstrate that expression of alpha(v)beta(3) in cell lines and xenografts was accompanied by an accumulation of active MT1-MMP and MMP-2. Furthermore, MT1-MMP and alpha(v)beta(3) are co-localized on the cell membrane of tumor cells. These findings suggest that activated MT1-MMP co-localized with alpha(v)beta(3) may be involved in activation of alpha(v)beta(3)-bound MMP-2.     

MMP-2、MMP-9及TIMP-2、TIMP-1在宫颈鳞癌中的表达及其意义

目的:探讨基质金属蛋白酶MMP-2、MMP-9及其组织抑制物TIMP-2、TIMP-1在宫颈鳞癌组织中的表达,及其间比值与宫颈鳞癌侵袭、转移的关系。方法:应用RT-PCR技术检测33例宫颈鳞癌和30例慢性宫颈炎组织中MMP-2、MMP-9、TIMP-2、TIMP-1mRNA表达水平。结果:(1)MMP-2、MMP-9在宫颈鳞癌组织中表达高于慢性宫颈炎组织,其表达值随癌的分期、病理分级的增高及淋巴结的浸润和转移而升高,TIMP-2、TIMP-1的表达则相反(P<0·01)。(2)宫颈鳞癌组织的分期、病理分级与MMPs/TIMPs值成正相关。结论:MMP-2,MMP-9,TIMP-2,TIMP-1的表达与宫颈鳞癌的发生发展密切相关,MMPs/TIMPs可能是评价宫颈鳞癌分期和病理分级的—个可靠指标。     

非小细胞肺癌MMP-2、MMP-9、TIMP-1表达及与预后关系研究

目的　研究非小细胞肺癌中MMP 2、MMP 9、TIMP 1蛋白和mRNA的表达 ,探讨其与淋巴结转移及预后的关系。方法　应用免疫组织化学和原位杂交方法检测非小细胞肺癌患者石蜡包埋肺癌组织中MMP 2、MMP 9、TIMP 1蛋白和mRNA表达。结果　MMP 2、MMP 9、TIMP 1的表达在不同年龄、性别、组织学类型及分化程度间无显著性差异 ,在淋巴结转移与否组间有显著性差异 (P值均 <0 .0 1)。患者术后生存期与淋巴结转移与否、MMP 2及MMP 9的表达强度显著相关 (P值分别为 0 .0 13 0、0 .0 175及 0 .0 0 10 )。MMP 2、MMP 9、TIMP 1mRNA与蛋白表达具有一致性 (P <0 .0 1,P <0 .0 0 5 ,P <0 .0 2 5 )。结论　MMP 2、MMP 9是影响预后的独立指标 ;TIMP 1是影响预后的有意义的指标。     

EMMPRIN-induced MMP-2 activation cascade in human cervical squamous cell carcinoma

Tumor progression and recurrence of cervical cancer is associated with upregulation of matrix metalloproteinase 2 (MMP-2). We evaluated the location, origin and activity of MMP-2 in cervical squamous cell carcinomas in comparison with MT1-MMP (MMP-14), TIMP-2 and extracellular matrix metalloproteinase inducer (EMMPRIN). Positive immunostaining for MMP-2 in malignant cells was detected in 83% of the patients. Two patterns of tumor cell MMP-2 staining were observed: either homogenous in all tumor cells or confined to the cells neighboring the stroma (tumor-border staining pattern, TBS). Fluorescence in situ zymography showed active MMP-2 mainly around tumor nodules displaying TBS. The MMP-2 staining of TBS tumors correlated significantly with the presence of TIMP-2 and MT1-MMP, proteins involved in docking MMP-2 to the cell surface and essential for MMP-2 activation. In situ mRNA hybridization in TBS tumors demonstrated more abundant presence of MMP-2 mRNA in neighboring myofibroblasts than in the adjacent tumor cells. Moreover, the TBS MMP-2 pattern correlated with the presence of EMMPRIN (p = 0.023), suggesting that tumor cells induce MMP-2 production in nearby stromal cells. This pro-MMP-2 could subsequently be activated on tumor cells via the presence of MT1-MMP and TIMP-2. The biological relevance of this locally activated MMP-2 was underscored by the observation that only the TBS pattern of MMP-2 significantly correlated with decreased survival. In conclusion, the colocalization of EMMPRIN, MT1-MMP and TIMP-2 in human cervical carcinomas seems to be involved in a specific distribution pattern of tumor cell bound MMP-2, which is related with local proteolytic activity and therefore might be associated with worse prognosis of the patients.     

基质金属蛋白酶及其组织抑制物在卵巢肿瘤中的表达

背景与目的：有研究表明,基质金属蛋白酶（metalloproteinases,MMPs）与肿瘤的发生发展,尤其是肿瘤细胞的侵袭和转移密切相关。本研究探讨基质金属蛋白酶MMP－2、MMP－9及其组织抑制物（tissue inbibitor of metalloproteinases-2,TIMP-2）与卵巢癌侵袭及卵巢癌生物学行为的关系。方法：采用免疫组化S－P法对128例卵巢肿瘤组织MMP－2、MMP－9及TIMP－2蛋白表达进行检测,并用Χ^2检验进行统计学分析。结果：免疫组化结果表明,MMP－2、MMP－9及TIMP－2在卵巢癌组织中阳性表达率明显高于卵巢囊腺瘤（P＜0．01）。MMP－2及MMP－9在卵巢癌临床分期Ⅲ-Ⅳ期病例中的阳性表达率明显高于I－Ⅱ期者,病理学分级3级病例中的表达率明显高于1－2级者（P＜0．01）,有淋巴结转移病例中的表达率明显高于无淋巴结转移者（P＜0．01）。而TIMP－2的阳性表达与MMP－2及MMP－9相反。结论：MMP－2、MMP－9及TIMP－2的表达与卵巢癌的临床分期、病理分级及淋巴结转移有关,MMP－2及MMP－9蛋白的高表达可作为判断卵巢部具有转移倾向的临床参考指标。     

Increased expression of membrane-type matrix metalloproteinase-1 is correlated with poor prognosis in patients with osteosarcoma

Numerous studies have demonstrated a correlation of matrix metalloproteinase (MMP) overexpression with the prognosis of various kinds of cancer. The current study investigated whether the expression of MMPs is correlated with the prognosis of osteosarcoma. Expression levels of MMP-2, -9, MT1-MMP and TIMP-2 were examined immunohistochemically in samples from 47 patients with osteosarcoma. Correlation of the positivity of staining with prognosis was analyzed with the Kaplan-Meier method, and statistically analyzed with log-rank test. Co-localization of MMP-2, MT1-MMP and TIMP-2 was determined by double staining with fluorescence-conjugated antibodies. Activities of gelatinases in representative tissues were examined with gelatin zymography. MMP-2 was expressed strongly in 60% of cases (28/47), and MMP-9, MT1- MMP and TIMP-2 was strongly positive in 61% (29/47), 45% (21/47), and 91% (43/47), respectively. Increased MT1-MMP expression was associated significantly with poor prognosis in overall survival (P=0.0480). In cases of overexpression for both MMP-2 and MT1-MMP, there was a tendency for poor prognosis (P=0.0969). In 36 cases who underwent neoadjuvant chemotherapy, wide resection of the tumors and post-operative adjuvant chemotherapy, increased expression of MT1-MMP resulted in a significant negative prognostic factor for disease-free survival (P=0.0143). Also, co-overexpression of MT1-MMP and MMP-2 showed a tendency to correlate to the reduced disease-free survival (P=0.0502). Increased gelatinase activity was observed in tissues of co-overexpression of MT1-MMP and MMP-2. The results of this study demonstrate the correlation of MT1-MMP expression and the oncological outcome of osteosarcoma patients, suggesting the prognostic significance of these proteins in osteosarcoma patients.     

MT1-MMP和TIMP-2在非小细胞肺癌中的表达及与病理特征的相关性

目的：研究NSCLC中MT1-MMP及TIMP-2的表达及与病理类型分型、淋巴结转移和TNM分期关系。方法：采用免疫组化SP法检测MT1-MMP及TIMP-2在80例NSCLC患者和80例癌旁组织中的表达。结果：在NSCLC中MT1-MMP阳性表达率为73.8%,癌旁组织中为52.5%,（P〈0.05）。在NSCLC中TIMP-2的阳性表达率为42.5%,癌旁组织为72.5%,（P〈0.05）。MT1-MMP和TIMP-2的表达与肺癌的病理分类及肿瘤大小无关,而与TNM分期及淋巴结转移有关。MT1-MMP和TIMP-2的表达呈负相关（r=-0.635,P〈0.05）。结论：MT1-MMP和TIMP-2可能参与了NSCLC的发生发展过程,有望成为判断肺癌转移和预后的指标。     

MT1-MMP和TIMP-2在非小细胞肺癌中的表达及与病理特征的相关性

目的 研究NSCLC中MT1-MMP及TIMP-2的表达及与病理类型分型、淋巴结转移和TNM分期关系.方法 采用免疫组化SP法检测MT1-MMP及TIMP-2在80例NSCLC患者和80例癌旁组织中的表达.结果 在NSCLC中MT1-MMP阳性表达率为73.8%,癌旁组织中为52.5%,(P<0.05).在NSCLC中TIMP-2的阳性表达率为42.5%,癌旁组织为72.5%,(P<0.05).MT1-MMP和TIMP-2的表达与肺癌的病理分类及肿瘤大小无关,而与TNM分期及淋巴结转移有关.MT1-MMP和TIMP-2的表达呈负相关(r=-0.635,P<0.05).结论 MT1-MMP和TIMP-2可能参与了NSCLC的发生发展过程,有望成为判断肺癌转移和预后的指标.     

基质金属蛋白酶9及其抑制物与大肠癌分期和预后的相关性研究

目的:探讨基质金属蛋白酶9及其抑制物的表达与大肠癌分期和预后的相关性,以期在分子水平上更准确判断患者的预后及寻找相应的基因治疗方法提供依据.方法:采用免疫组化SP法对70例大肠癌术后标本的MMP-9及TIMP-1蛋白进行检测.结果:大肠癌MMP-9和TIMP-1蛋白表达存在显著正相关(r=0.397,P＜0.05).MMP-9蛋白阳性表达在不同Dukes分期、浸润深度及淋巴结转移中的大肠癌有显著性差异(P＜0.05,P＜0.01).TIMp-1蛋白阳性表达在不同的组织学类型及分化程度的大肠癌中存在显著性差异(P＜0.05).不同年龄的大肠癌患者MMP-9和TIMP-1蛋白的表达存在显著性差异(P＜0.05).MMP-9蛋白阳性表达组5年生存率低于阴性组(P＜0.05).结论:大肠癌Dukes C期肿瘤组织中MMP-9蛋白的表达明显高于Dukes A期及B期,肿瘤浸润越深,MMP-9蛋白的表达越高.有淋巴结转移的大肠癌患者MMP-9蛋白阳性表达率明显高于无转移患者.在恶性度较低或分化程度较高的肿瘤组织中,其TIMP-1蛋白的阳性率明显较高.MMP-9蛋白阳性表达患者预后较差.MMP-9可作为预测大肠癌侵袭转移及预后的独立指标.