RECK,MMP-9及TGF-β1在胃癌组织中的表达及其相互关系

目的研究RECK,MMP-9和TGF-β1在胃癌及正常胃组织中的表达,探讨其在胃癌的发生、发展、浸润和转移中的作用.方法选择临床及病理资料齐全的存档胃腺癌蜡块标本54例,另取正常胃黏膜标本15例作对照.采用第二代通用型二步法监测系统(PV-9000)免疫组化方法检测RECK,MMP-9及TGF-β1在胃癌及正常胃组织中的表达.结果RECK在胃癌组织中低表达(51.9%),并随肿瘤浸润深度的加深、淋巴转移的产生、远隔转移的发生、临床分期的提高、肿瘤病理分化程度的降低而降低(P＜0.05).MMP-9在胃癌组织中高表达(75.9%),并随肿瘤浸润深度的加深、淋巴转移的产生、临床分期的提高、肿瘤病理分化程度的降低而增高(P＜0.05).TGF-β1在胃癌组织中高表达(77.8%),并随淋巴转移的产生、临床分期的提高、肿瘤病理分化程度的降低而增高(P＜0.05).胃癌组织中RECK与MMP-9、TGF-β1的表达呈负相关(r=-0.618,P＜0.001;r=-0.620,P＜0.001),MMP-9与TGF-β1的表达呈正相关(r=0.716,P＜0.001).结论胃癌组织中RECK低表达,MMP-9,TGF-β1高表达.RECK,MMP-9及TGF-β1可以作为评估胃癌发生浸润转移的重要指标.     

RECK,MMP-9及TGF-β1在胃癌组织中的表达及其相互关系

目的:研究RECK,MMP-9和TGF-β1在胃癌及正常胃组织中的表达,探讨其在胃癌的发生、发展、浸润和转移中的作用.方法:选择临床及病理资料齐全的存档胃腺癌蜡块标本54例,另取正常胃黏膜标本15例作对照.采用第二代通用型二步法监测系统(PV-9000)免疫组化方法检测RECK,MMP-9及TGF-β1在胃癌及正常胃组织中的表达.结果:RECK在胃癌组织中低表达(51.9%),并随肿瘤浸润深度的加深、淋巴转移的产生、远隔转移的发生、临床分期的提高、肿瘤病理分化程度的降低而降低(P<0.05).MMP-9在胃癌组织中高表达(75.9%),并随肿瘤浸润深度的加深、淋巴转移的产生、临床分期的提高、肿瘤病理分化程度的降低而增高(P<0.05).TGF-β1在胃癌组织中高表达(77.8%),并随淋巴转移的产生、临床分期的提高、肿瘤病理分化程度的降低而增高(P<0.05).胃癌组织中RECK与MMP-9、TGF-β1的表达呈负相关(r=-0.618,P<0.001;r=-0.620,P<0.001),MMP-9与TGF-β1的表达呈正相关(r=0.716,P<0.001).结论:胃癌组织中RECK低表达,MMP-9,TGF-β1高表达.RECK,MMP-9及TGF-β1可以作为评估胃癌发生浸润转移的重要指标.     

PTEN和MMP-9在胃癌组织中的表达及意义

采用免疫组化法检测45份胃癌组织标本PTEN和MMP-9的表达情况.结果 PTEN表达与肿瘤浸润深度、淋巴结转移、TNM分期呈负相关(P均<0.05),与肿瘤组织分化程度呈正相关(P<0.05),与肿瘤大小无相关性(P>0.05);MMP-9表达与肿瘤浸润深度、淋巴结转移、TNM分期呈正相关(P<0.05),与肿瘤的组织分化程度呈负相关(P<0.05),与肿瘤大小无相关性(P>0.05);PTEN与MMP-9表达呈显著负相关(r=-0.537,P<0.05).提示PTEN和MMP-9与胃癌的发生、发展、侵袭与转移密切相关.     

胃癌组织中MTA1,PTEN,E-cadherin的表达及其相互关系

目的:观察MTA1,PTEN,E-cadherin蛋白在胃癌和正常胃黏膜组织中的表达,探讨其与胃癌浸润、转移和生物学行为的关系.方法:应用免疫组织化学方法检测54例胃癌手术切除标本和15例正常胃黏膜组织中MTA1,PTEN,E-cadherin的表达.各指标之间相关因素的差异性比较采用χ2检验,相关性研究采用Spearman相关分析:结果:与正常胃组织相比,MTA1蛋白在胃癌组织中高表达(46.3% vs 6.7%,P＜0.01),PTEN和E-cadherin蛋白在胃癌组织中表达下调或缺失(51.9% vs 100%,42.6% vs 100%,均P＜0.01).MTA1和PTEN的阳性表达率与肿瘤浸润深度(P=0.003,P=0.001)、病理分期(P=0.004,P=0.008)、淋巴转移(P=0.000,P=0.001)、远隔转移(P=0.004,P=0.006)、临床分期有关(P=0.001,P=0.000);E-cadherin的正常表达率与肿瘤浸润深度(P=0.027)、病理分化程度(P=0.006)、淋巴转移(P=0.044)、临床分期有关(P=0.000).Spearman相关分析显MTA1与PTEN蛋白、MTA1与E-cadherin蛋白的表达呈负相关(r=-0.518,r=-0.424,均p＜0.05).PTEN蛋白与E-cadherin蛋白的表达呈正相关(r=0.53,P＜0.05).结论:MTA1蛋白水平高表达和PTEN,E-cadherin蛋白水平低表达可能与胃癌浸润和转移有关,且联合检测可以用于判断胃癌的生物学行为.     

HIF-1α及其调控基因PTEN在胃癌中表达的相互关系及临床病理意义

目的探讨缺氧诱导因子-1α(HIF-1α)及其调控基因PTEN在胃癌及正常胃组织中表达的相互关系以及他们在胃癌的发生发展、浸润和转移中的作用.方法应用免疫组化SP法检测54例胃癌组织中HIF-1α和PTEN的表达情况,探讨他们与胃癌临床病理因素的关系.结果HIF-1α在胃癌中的表达率(74.07%)明显高于正常胃组织(0%)(P＜0.01);HIF-1α的表达与胃癌TNM分期(P＜0.05)、肿瘤浸润深度(P＜0.01)和淋巴结转移显著相关(P＜0.05).胃癌中PTEN低表达(51.9%),且在肿瘤浸润深(38.5% vs 86.7%,P＜0.01)、有淋巴(28.0% vs 72.4%,P＜0.01)和远隔转移(16.7% vs 61.9%,P＜0.05)、临床分期高(28.6% vs 76.9%,P＜0.01)、病理分化低(22.2% vs 70.6%,63.2%,P＜0.01)的胃癌组织表达明显降低.胃癌组织中HIF-1α与PTEN的表达呈负相关(r=-0.41,P＜0.05).结论HIF-1α和PTEN在胃癌的发生发展中起重要作用,联合检测可作为判断胃癌恶性程度和预后的指标.     

胃癌组织 PTEN基因的表达及其与MMP-9的相关性

目的 检测抑癌基因PTEN在胃癌中的表达,观察其与胃癌临床病理因素的关系及与MMP-9蛋白表达的相关性.方法 应用免疫组化法检测57例胃癌及其癌旁正常组织PTEN基因和MMP-9蛋白的表达.结果 胃癌组织PTEN蛋白表达的阳性率(61.4%)明显低于相应正常组织(100%)(P<0.01),其表达水平与组织分化程度、浸润深度、淋巴结转移及TNM分期有关(P<0.01). 胃癌组织MMP-9蛋白表达的阳性率(73.7%)明显高于相应正常组织(19.3%)(P<0.01),其表达水平随胃癌浸润深度增加、淋巴结转移及TNM分期的进展而增高.PTEN蛋白表达强度与MMP-9蛋白表达强度之间呈明显负相关(rs=-0.462,P<0.01). 结论提示抑癌基因PTEN的表达与胃癌生物学行为密切相关;在胃癌发生、发展过程中,可能由于PTEN蛋白的低表达或失表达,不能有效抑制MMP-9的异常激活,促进了癌细胞的浸润、转移.     

胃癌中MMP-2表达及淋巴管密度与淋巴结转移的关系

目的 探讨胃癌组织中基质金属蛋白酶-2（MMP-2）的表达及淋巴管密度与淋巴结转移的关系。方法 收集根治性手术切除的68例胃癌原发病标本，同时选取10例胃良性病变的正常胃组织标本，应用免疫组织化学SP法检测MMP-2在胃癌组织和正常胃组织中的表达水平及淋巴管密度的高低。结果 MMP-2蛋白、淋巴管密度在胃癌组织和正常胃黏膜组织中的表达差异育显著性，具有统计学意义（P〈0．001）。MMP-2、淋巴管密度在伴有淋巴结转移的胃癌中的表达较无淋巴结转移的胃癌中的表达在统计学上有显著性差异（P〈0．001）。MMP-2的表达、淋巴管密度与胃癌浸润深度、TNM分期、肿瘤分化程度、临床分期及淋巴结转移密切相关。MMP-2的表达与淋巴管密度的高低呈正相关（rs=0．663）。结论 胃癌组织中MMP-2蛋白的表达、淋巴管密度和胃癌浸润深度、TNM分期、肿瘤分化程度、临床分期及淋巴结转移密切相关。MMP-2抑制剂及VEGFR-3抑制剂的研究将为抗肿瘤淋巴转移的治疗开辟一条新途径。     

胃癌组织中MMP-9和TIMP-1的表达及其临床意义

背景：有关胃癌组织中基质金属蛋白酶（MMPs）和金属蛋白酶组织抑制剂（TIMPs）表达的研究不多且结果不一。目的：探讨胃癌组织中MMP-9和TIMP-1的表达及其临床意义。方法：收集临床病理资料完整的98例胃癌患者。应用免疫组化法检测组织中MMP-9和TIMP-1表达．并分析其与临床病理特征的关系以及各参数对胃癌患者预后的影响。结果：胃癌组织中MMP-9高表达与浸润深度、淋巴结转移和TNM分期显著相关（P〈0．01）。单因素分析显示胃癌患者预后与MMP-9高表达（P=0．014）、浸润深度（P〈0．001）、淋巴结转移（P〈0．0001）和TNM分期（P〈0．0001）相关。TIMP-1表达与胃癌患者临床病理特征和预后无关。结论：MMP-9高表达与胃癌的发生、进展有关,可作为胃癌患者预后指标之一。     

HIF-1α及其调控基因PTEN在胃癌中表达的相互关系及临床病理意义

目的:探讨缺氧诱导因子-1α(HIF-1α)及其调控基因PTEN在胃癌及正常胃组织中表达的相互关系以及他们在胃癌的发生发展、浸润和转移中的作用.方法:应用免疫组化SP法检测54例胃癌组织中HIF-1α和PTEN的表达情况,探讨他们与胃癌临床病理因素的关系.结果:HIF-1α在胃癌中的表达率(74.07%)明显高于正常胃组织(0%)(P<0.01);HIF-1α的表达与胃癌TNM分期(P<0.05)、肿瘤浸润深度(P<0.01)和淋巴结转移显著相关(P<0.05).胃癌中PTEN低表达(51.9%),且在肿瘤浸润深(38.5%vs 86.7%,P<0.01)、有淋巴(28.0%vs 72.4%,P<0.01)和远隔转移(16.7%vs 61.9%,P<0.05)、临床分期高(28.6%vs 76.9%,P<0.01)、病理分化低(22.2%vs 70.6%,63.2%,P<0.01)的胃癌组织表达明显降低.胃癌组织中HIF-1α与PTEN的表达呈负相关(r=-0.41,P<0.05).结论:HIF-1α和PTEN在胃癌的发生发展中起重要作用,联合检测可作为判断胃癌恶性程度和预后的指标.     

胃癌组织中DPC4和PTEN蛋白表达特点及临床意义

目的探讨胃癌组织DPC4、PTEN蛋白表达与胃癌分化程度、淋巴结转移及临床分期的关系。方法选取解放军174医院2013年5月-2014年8月胃癌标本60例,采用免疫组织化学方法检测DPC4、PTEN蛋白表达,并分析表达水平与临床病理参数之间的关系。结果胃癌组织中DPC4、PTEN蛋白表达低于邻近正常胃黏膜组织(P0.05),且表达水平与癌细胞分化程度、淋巴结转移及临床分期密切相关;DPC4与PTEN的表达呈正相关(r=0.701)。结论胃癌发生、发展、浸润及转移与DPC4、PTEN蛋白表达关系密切。     

Growth,invasion, metastasis,differentiation, angiogenesis and apoptosis of gastric cancer regulated by expression of PTEN encoding products

AIM: To investigate expression of PTEN in gastric cancer and to explore its roles in tumorigenesis and progression of gastric cancer.METHODS: Formalin-fixed and paraffin-embedded tissues of adjacent non-tumor mucosa and primary foci from 113cases of gastric cancers were studied for the expression of PTEN and Caspase-3 andmicrovessel density (MVD)by streptavidin-peroxidase (S-P) immunohistochemistry with antibodies against PTEN, Caspase-3, and CD34. The relationship between PTEN and Caspase 3 expression and clinicopathological parameters of tumors was compared.RESULTS: Primary gastric cancer cells expressed PTEN less frequently than adjacent epithelial cells of primary foci (54.9％ vs89.4％; P=0.000, χ2=33.474). PTEN expression was significantly associated with invasive depth (P=0.003,rs=0.274), metastasis (P=0.036, rs=0.197), growth pattern (P=0.008, rs=0.282), Lauren′s classification (P=0.000,rs=0.345), and histological classification (P=0.005, rs=0.262)of tumors, but not with tumor size (P=0.639, rs=0.045),Borrmann′s classification (P=0.544, rs=0.070) or TNM staging (P=0.172, rs=0.129). PTEN expression was negatively correlated with MDV in primary gastric cancer (P=0.020,F=5.558). Primary gastric cancer cells showed less frequent immunoreactivity to Caspase-3 than adjacent epithelial cells of primary foci (32.7 ％ vs 50.4 ％; P=0.007,χ2=7.286).Caspase-3 expression was dependent of PTEN expression in primary gastric cancer cells (P=0.000, χ2=15.266).CONCLUSION: Down-regulated expression of PTEN plays an important role in tumorigenesis, progression, growth,differentiation and angiogenesis of gastric cancer. Low expression of PTEN can decrease expression of Caspase-3to disorder apoptosis of tumor cells, which might explain the molecular mechanisms of PTEN contributions to tumorigenesis and progression of gastric cancer.     

环氧合酶-2、基质金属蛋白酶-9和核增殖抗原在胃癌组织中的表达及临床意义

目的 探讨环氧合酶-2(COX-2)、基质金属蛋白酶-9(MMP-9)及核增殖抗原(Ki67)在胃癌中的表达与胃癌发生、浸润和转移的关系.方法 选择2003年1月至2005年12月手术切除、病理证实的胃癌存档蜡块标本58例,其中男37例,女21例.年龄31～76岁,中位年龄58.2岁.另取上述胃癌根治术患者距肿瘤5～6 cm的癌旁组织作对照.采用免疫组化法检测胃癌组织中COX2、MMP-9、Ki67的表达.结果 COX-2、MMP-9在胃癌组织中的表达率分别为82.76%和68.9%,均高于对照组(37.93%和24.14%,P＜0.01).COX-2、MMP-9的表达与胃癌患者性别、年龄、部位及大小无相关性(P＞0.05),与胃癌浸润深度、淋巴结转移及TNM分期有关(P＜0.05),MMP-9还与胃癌分化程度相关(P＜0.05).COX-2与MMP-9在胃癌组织中的表达有相关性(P＜0.05,C=0.359).MMP-9、COX-2表达阳性者Ki67表达水平高于阴性者,两者间差异有统计学意义(P＜0.01).结论 COX-2、MMP-9、Ki67在胃癌浸润、转移过程中起重要作用,共同促进肿瘤的发生、发展.     

Correlative studies on bFGF mRNA and MMP-9 mRNA expressions with microvascular density, progression, and prognosis of gastric carcinomas

AIM: To investigate the mRNA expressions of bFGF and MMP-9 in gastric carcinomas so as to reveal their correlations with tumor microvascular density (MVD),invasion, metastasis, and prognosis. METHODS: In situ hybridization and immunohistochemical techniques were used to detect the expressions of bFGFmRNA and MMP-9mRNA and the proteins of CD34 in 105 specimens of gastric carcinomas. RESULTS: In situ hybridization study showed that positive rates of bFGF mRNA and MMP-9mRNA expressions were 60.95% and 59.19%; the mean MVD was 46.09±11.52 and 43.75±13.41, respectively in piece/0.72 mm2 in tumors with bFGFmRNA and MMP-9mRNA positive expressions, which were significantly higher than those with negative expression (29.41±12.47; 33.45±13.92 piece/0.72 mm2, respectively). The positive expression rates of bFGFmRNA and MMP-9mRNA were correlated to the tumor invasion depth (rs= 0.211, P= 0.031; rs= 0.335, P= 0.001), growing pattern (rs= 0.324, P= 0.001; rs= 0.267, P= 0.006), vessel invasion (rs= 0.579, P= 0.001; rs = 0.209, P= 0.032), lymph node metastasis (rs= 0.405, P= 0.001; rs= 0.343, P= 0.001) and distant metastasis (rs= 0.474, P= 0.001; rs = 0.468, P = 0.001), but not correlated to tumor type (rs=0.134,P=0.173;rs=0.103,P=0.145) and differentiations (rs=0.096,P= 0.332;rs=0.102,P=0.298). The mean MVD was much higher in the tumors with infiltrating growth at stage T3-T4, with vessel invasion, lymph node metastasis and distant metastasis than those with expanding growth type (t = 10.105, P= 0.001) at stage T1-T2 (t=5.961,P=0.001),with non-vessel invasion (t=7.394,P=0.001),non-lymph node metastasis (t = 3.819, P= 0.01) and non-distant metastasis (t = 10.578, P= 0.001). Positive correlation was observed between MVD and the expressions of bFGFmRNA and MMP-9mRNA (t = 3.207, P=0.002; t = 7.035, P= 0.001, respectively). The mean survival time and 5-year survival rate were lower in cases with MVD over 39.5 and the positive expressions of bFGFmRNA and MMP-9mRNA than those with MVD less than 39.5 and the negative expressions of bFGFmRNA and MMP-9mRNA. CONCLUSION: bFGF and MMP-9 promote the angiogenesis of the gastric cancers. Detection of the expressions of bFGF and MMP-9 can serve as a useful index to determine the angiogenesis, invasion, metastasis, and prognosis of gastric cancers.     

Clinical significance of matrix metalloproteinase-9 expression in esophageal squamous cell carcinoma

AIM: To evaluate the expression of matrix metalloproteinase-9 (MMP-9) and its clinical significance in esophageal squamous cell carcinoma (ESCC). METHODS: The expression of MMP-9 in 208 cases of ESCC was detected by immunohistochemistry (IHC) and its clinical significance in ESCC especially the relationship with the clinicopathological parameters was analyzed. RESULTS: The percentage of positive cases for MMP-9 detected by IHC was 49.0%. MMP-9 was mainly expressed in the cytoplasm of cancer cells especially in the invasive front. Only weak expression was detected in the stromal cells and no expression in non-cancerous mucosa. The expression of MMP-9 was positively correlated with poorer differentiation (P= 0.001<0.01), existence of vessel permeation (P= 0.027<0.05) and lymph node metastasis (P=0.027<0.05). CONCLUSION: The expression of MMP-9 correlates with the cancer cell differentiation, vessel permeation and lymph node metastasis. It may be a novel biomarker for the diagnosis and treatment of ESCC.     

Caspase-3和P53在胃癌中的表达及临床意义

目的通过检测Caspase-3和P53在胃癌组织及正常胃黏膜组织中的表达情况,探讨两者与胃癌发生、发展的关系。方法采用免疫组化SP法检测胃癌组织及正常胃黏膜组织中两者的表达情况。结果胃癌组织及正常胃黏膜组织中,Caspase-3的表达阳性率分别为30.0%(15/50)、70.0%(14/20),差异有统计学意义(P0.05);P53在胃癌组织及正常胃黏膜中表达阳性率分别为76.0%(38/50)、25.0%(5/20),差异有统计学意义(P0.05);Caspase-3和P53的阳性表达率与胃癌的浸润深度、分化程度、淋巴结转移密切相关。结论 Caspase-3和P53与胃癌的发生及发展密切相关。     

Significance of Survivin and PTEN expression in full lymph node-examined gastric cancer

AIM:To study the relationship between Survivin andPTEN expression and lymph node metastasis,depth ofinvasion and prognosis of gastric cancer patients in Chi-na.METHODS:Specimens of gastric cancer tissue were col-lected from the Affiliated Hospital of Jianghan University.All the 140 patients had complete examination data.Alllymph nodes were found by the fat-clearing method.Theinterrupted serial 4-micron sections,routine hematoxylinand eosin staining and immunohistochemical methodswere used to detect the lymph node metastases.Gastriccancer tissue microarray was performed to test the ex-pression of Survivin and PTEN(17A)in gastric cancer byimmunohistochemical method.All data were processedusing x~2 test,Fisher's exact test,Kaplan-Meyer Log-rankmethod and Cox multivariate analysis(SPSS 12.0 soft-ware).RESULTS:One hundred and eighteen specimenswere used in our tissue microarray(utilization rate was82.4%).A total of 7580 lymph nodes were found.Metas-tases were found in 90 specimens and 1618 lymph nodeswere detected.The positive rate of Survivin and PTENexpression was 52.5%(62/118)and 76.2%(90/118),respectively.A highly positive correlation was found be-tween Survivin and PTEN expression(x~2=4.17,P=0.04).Survivin expression was positively correlated with UICCN stage(x~2=8.69,P=0.03)and histological classifica- tion(x~2=4.41,P=0.04)by x~2 tests.PTEN expression waspositively correlated with depth of invasion(P=0.02)andhistological classification(x~2=5.47,P=0.02).But Survivinand PTEN expressions were not related with prognosis ofgastric cancer patients.A significant correlation betweenlymph node metastasis and prognosis was demonstratedby Cox multivariate analysis(x~2=4.85,P=0.028).CONCLUSION:Survivin is positively correlated withPTEN expression in gastric cancer and is a molecularmarker of lymph node metastasis while PTEN expressionis a molecular marker of advanced gastric cancer.UICCN stage is the most important prognostic factor of gastriccancer in China.     

Imbalance between expression of matrix metalloproteinase-9 and tissue inhibitor of metalloproteinase-1 in invasiveness and metastasis of human gastric carcinoma

AIM: The expressive balance between matrix metalloproteinase-9 (MMP-9) and its tissue inhibitor of metalloproteinase-1 (TIMP-1) plays a critical role in maintaining the degradation and synthesis of extracellular matrix. Loss of such balance is associated with invasion and metastasis of tumors. This study aimed to determine the expression of MMP-9 and TIMP-1 in gastric carcinoma, and the association of the expressive imbalance between MMP9 and TIMP-1 with the invasion and metastasis and prognosis of gastric carcinoma.METHODS: We used immunohistochemistry to determine the expressions of MMP-9, TTMP-1 and proliferating cell nuclear antigen Ki-67 in the gastric specimens taken from 256 patients with primary gastric carcinoma. The patients were followed-up for up to 96 months.RESULTS: No association between the expression of MMP9 and TIMP-1 and patients' sex and age, tumor size and location of gastric carcinoma was observed. The incidence of the positive expression of MMP-9 in cases with tumors invasion to muscularis propria and visceral peritoneum (70.13% and 69.09%, respectively) was significantly higher than that in cases with tumor invasion only to lamina propria or submucosa (42.50 %, P=0.0162). The positive correlation between MMP-9 expression and the depth of tumor invasion was observed (Pearson correlation coefficient=0.2129,P=0.016). Along with the increase of the metastatic station of lymph nodes, the incidence of the MMP-9 expression was increased by degrees; a positive correlation between them was observed (Pearson correlation coefficient=0.2910,P=0.0001). There was also a significant correlation between MMP-9 expression and the TNM stage in gastric carcinoma (Pearson correlation coefficient=0.3027, P＜0.0001). The incidence of MMP-9 expression in stage Ⅱ and Ⅲ/Ⅳ (75.00%and 76.15%, respectively) was significantly higher than those in stage Ⅰ (46.15 %, P＜0.0001). A negative correlation between TIMP-1 immunoreactivity and the depth of invasion,status of lymph node metastasis and TNM stage was observed (Pearson correlation coefficient =-0.1688, -0.3556and -0.3004, P=0.023, ＜0.0001 and ＜0.0001, respectively).Four types of co-expression of MMP-9 and TIMP-1 were observed; i.e. MMP-9 positive but T IMP-1 negative (n=115),both positive (n=52), both negative (n=62) and MMP-9negative but TIMP-1 positive (n=27). The frequency of serosal invasiveness was significant higher in patients with MMP-9 but without TIMP-1 expression than those with other types of the co-expression (P=0.0303). The incidence of lymph node metastasis was highest in patients with MMP-9but without TIMP-1 expression, and lowest in those with TIMP-1 but without MMP-9 expression (P＜0.0001). The survival rate in patients with MMP-9 but without TIMP-1expression was lower than that in those with TIMP-1 but without MMP-9 expression (P=0.0014).CONCLUSION: Our results in gastric carcinoma demonstrated a significant positive association of MMP-9 over-expression with proliferation of tumor cells, the depth of invasiveness,lymph node metastasis and TNM stage, suggesting MMP-9can serve as a molecular marker of tumor invasion and metastasis. We also demonstrate a significant negative relationship of TIMP-1 expression with the depth of invasiveness and lymph node metastasis, which provide a new idea in the tumor biological and genetic treatment.The interaction between MMP-9 and TIMP-1 in the processes of tumor invasion and metastasis is that MMP-9 mainly promotes tumor invasion and metastasis and TIMP-1 inhibits functions of MMP-9. The imbalance between MMP-9 and TIMP-1 expression may suggest the occurrence of tumor invasion and metastasis, predict poor prognosis. For patients with imbalanced MMP-9 and TIMP-1 expression, the optimal treatment scheme needs to be selected.     

MMP-7与Fas蛋白在胃癌组织中的表达及意义

目的:探讨基质金属蛋白酶-7(MMP-7)蛋白和Fas蛋白在胃癌组织中的表达、相互关系及意义.方法:应用免疫组化方法检测了82例胃癌组织及30例周边正常胃黏膜中MMP-7和Fas的表达情况.结果:胃癌组织中MMP-7蛋白阳性率显著高于正常胃黏膜(73.2%vs10%,P<0.001);正常胃黏膜中Fas蛋白阳性率显著高于胃癌组织(39.1%vs93.3%,P<0.001).MMP-7阳性表达率与淋巴结转移、TNM分期显著相关(P<0.001),而与肿瘤细胞分化程度无显著性相关.Fas蛋白阳性表达率与肿瘤细胞分化程度显著相关(P<0.05),而与淋巴结转移、TNM分期无显著性相关.胃癌组织中MMP-7与Fas表达具有显著等级负相关(r=-0.597,P<0.001).结论:MMP-7与Fas表达胃癌的生物学行为密切相关,且两者之间的表达强度具有显著等级负相关.