胃癌组织中PTEN,MMP-9和Caspase-3表达的关系

目的:研究PTEN,MMP-9和Caspase-3在胃癌及正常胃组织中的表达,探讨他们在胃癌的发生、发展、浸润和转移中的作用．方法:选择临床病理资料齐全的胃癌蜡块标本54例,另取正常胃黏膜标本15例作对照．采用SP免疫组化方法检测PTEN,MMP-9和 Caspase-3在其中的表达．结果:胃癌中PTEN低表达(28/54,51．9％),且肿瘤浸润深(P=0．004)、有淋巴(P=0．003) 和远隔转移(P=0．01 5)、临床分期高(P= 0．001)、病理分化低(P=0．008)时降低．胃癌中MMP-9高表达(41／54,75．9％),且肿瘤浸润深(P=0．040)、有淋巴转移(P=0．025)、临床分期高(P=0．039)、病理分化低(P=0．009)时增高．胃癌中Caspase-3低表达(12／54,22．2％), 且有淋巴转移(P=0．045)、临床分期高(P= 0．015)、病理分化低(P=0．035)时降低．胃癌中PTEN与MMP-9(r=-0．543,P=0．001), Caspase-3与MMP-9的表达负相关(r=0．741, P=0.001),PTEN与Caspase-3的表达正相关(r =0．515,P=0．001)．结论:胃癌中PTEN,Caspase-3低表达,MMP-9 高表达;PTEN、MMP-9和Caspase-3可作为胃癌诊断和预后判断的指标．     

胃癌发生和演进中maspin和Kail表达的临床病理意义

目的观察maspin和Kail在胃癌及癌前病变中的表达,并探讨他们在胃癌发生和演进中的作用.方法采用免疫组化方法检测maspin和Kail在正常胃黏膜(n=182)、胃异型增生(n=69)和胃癌(n=113)中的表达,比较他们表达与胃癌临床病理特征的关系,并探讨maspin和Kail表达的关系.结果Maspin在正常胃黏膜、胃异型增生和胃癌中的阳性率分别为79.8%(145/182)、75.4%(52/69)和50.4%(57/113),Kail在相应组织中的阳性率分别81.9%(149/182)、65.2%(49/69)、58.4%(66/113).正常胃黏膜和胃异型增生中maspin表达高于胃癌(P＜0.01),正常胃黏膜中Kail表达高于胃异型增生和胃癌(P＜0.01).maspin表达与胃癌浸润深度(P=0.003＜0.01)、转移(P=0.027＜0.05)、Lauren分型(P=0.015＜0.05)和组织学分型相关(P=0.024＜0.05),而与肿块大小、Borrmann分型、生长方式和TNM分期无关(P＞0.05).Kail表达与浸润深度(P=0.043＜0.05)、转移(P=0.005＜0.01)、生长模式(P=0.034＜0.05)、Lauren(P=0.000＜0.01)和组织学分型相关(P＜0.05),而与肿块大小、Borrmann分型和TNM分期无关(P＞0.05).值得注意的是胃癌中maspin和Kail表达显著一致(P=0.008＜0.05).结论maspin和Kail表达下调在胃癌发生中起重要作用,maspin和Kail的表达可能对胃癌的浸润和转移具有抑制作用,可作为反应胃癌病理生物学行为的有效的客观指标.     

Paxillin、FAK和PTEN在胃腺癌组织中的表达及其临床意义

背景：研究表明Paxillin、黏着斑激酶（FAK）和PTEN在许多肿瘤的发生、发展、侵袭、转移中发挥重要作用,但联合检测三者在胃癌中表达的报道罕见。目的：研究正常胃黏膜和胃腺癌组织中Paxillin、FAK和PTEN的表达及其临床意义。方法：以免疫组化SP法分别检测40例正常胃黏膜组织和88例胃腺癌组织中Paxillin、FAK和PTEN表达,并分析其与胃腺癌临床病理特征的关系以及Paxillin与PTEN表达之间的相关性。结果：与正常胃黏膜组织相比,胃腺癌组织Paxillin（65．9％对32．5％,P〈0．05）、FAK（56．8％对17．5％,P〈0．05）阳性表达率显著增高,PTEN阳性表达率显著降低（47．7％对100％,P〈0．05）。Paxillin、FAK和PTEN表达与胃腺癌分化程度、浸润深度、淋巴结转移和TNM分期有关（P〈0．05）．与性别和年龄无关。胃腺癌组织中Paxillin表达与PTEN表达呈显著负相关（r=-0．369,P〈0．05）。结论：Paxillin、FAK高表达和PTEN低表达可能与胃腺癌的浸润、淋巴结转移等恶性生物学行为相关,联合检测三者可能有助于判断胃腺癌恶性程度和患者预后。     

生长抑素的表达与胃黏膜上皮癌变的关系

[目的]探讨生长抑素（ss）在胃黏膜上皮癌发生、发展中的作用及地位，从而为胃癌的诊断、治疗及预后判断提供一个新的途径。[方法]应用免疫组化SABC（Strept Avidin Biotin Complex）法检测78例胃癌组织和20例正常胃黏膜、53例胃黏膜上皮各级癌前病变标本中SS的表达。[结果]SS在正常胃黏膜中阳性表达率为85．0％，癌前病变组织中阳性表达率为43．4％，胃癌组织中阳性表达率为24．3％；高／中分化组和低分化组中的阳性表达率分别为34．2％、13．5％，随分化程度减低呈下降趋势；浸润黏膜层或黏膜下层和浸润肌层或浆膜层两组的阳性表达率分别为64．3％、15．6％，随浸润程度的加深其阳性表达率呈下降趋势；无淋巴结转移组和有淋巴结转移组的阳性表达率分别为38．7％、14．9％；TNMⅠ～Ⅱ期和Ⅲ～Ⅳ期的阳性表达率分别为45．5％、8．9％。以上两组间比较差异均有统计学意义（P〈0．05）。[结论]SS的低表达与胃癌的组织学分级、浸润深度、淋巴结转移及TNM分期密切相关。SS的失表达可能是胃黏膜上皮癌变过程中的重要机制之一。     

Paxillin和PTEN在胃腺癌组织中的表达及其临床意义

目的研究正常胃黏膜和胃腺癌组织中桩蛋白（Paxillin）及张力蛋白同源的磷酸酶基因（PTEN）的表达及其临床意义。方法应用免疫组织化学sP法分别检测Paxillin和VrEN在40例正常胃黏膜组织、88例胃腺癌组织中的表达,并探讨其与胃腺癌临床病理特征的关系以及二者之间表达的相关性。结果胃腺癌组织中Paxillin阳性表达率（72．5％）明显高于正常胃黏膜（32．5％）（P〈0．05）;PTEN阳性表达率（47．7％）明显低于正常胃黏膜（100％）（P〈0．05）。胃腺癌组织中PaxiUin和PTEN的表达与胃腺癌浸润深度、分化程度、淋巴结转移及临床分期有关（P〈0．05）,与年龄和性别无关（P〉0．05）。经Spearman相关分析,胃腺癌组织中Paxillin与PTEN的表达呈显著负相关（r=-0．369,P〈0．05）。结论胃腺癌组织中Paxillin蛋白水平的高表达与PTEN蛋白水平的低表达可能与胃腺癌的浸润和淋巴结转移等恶性生物学行为相关,二者联合检测可能成为一组能够有效判断胃癌恶性程度和患者预后的指标。     

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。     

E-cadherin,β-catenin,Cyclin D1在胃腺癌中的表达及临床意义

目的:研究E-cadherin,β-catenin,Cyclin D1在胃腺癌组织中的表达,探讨三者的表达及临床病理意义.方法:采用免疫组织化学SP法检测73例胃腺癌组织及18例正常胃黏膜组织中E-cadherin,β-catenin,Cyclin D1蛋白的表达.结果:正常胃黏膜组织中E-cadherin和β-catenin均呈清晰的棕褐色染色在上皮细胞细胞膜.E-cadherin和β-catenin在胃癌细胞中出现细胞质和/或细胞核异常染色,其异常表达率分别为63.01%(46/73)和56.16%(41/73),且两者的异常表达与胃腺癌的分化程度、TNM分期、浸润深度及淋巴结转移相关,与患者的性别、年龄、肿瘤大小无关.胃腺癌中E-cadherin和β-catenin表达密切相关.Cyclin D1在胃腺癌组织中的阳性表达率为67.12%(49/73),明显高于其在正常胃黏膜组织中的表达(0%,0/18),且与胃腺癌的分化程度和淋巴结转移相关.E-cadherin和β-catenin在胃癌中的异常表达与Cyclin D1的过表达呈显著的正相关(r=0.249,r=0.376,P＜0.05).结论:胃腺癌中存在E-cadherin和β-catenin基因的失活及蛋白表达下调.E-cadherin和β-catenin的异常表达可能通过促使或激活Cyclin D1的过表达而参与胃癌的发生和发展.     

E-cadherin, beta-catenin, Cyclin D1在胃腺癌中的表达及临床意义

目的研究E-cadherin,β-catenin,Cyclin D1在胃腺癌组织中的表达,探讨三者的表达及临床病理意义.方法采用免疫组织化学SP法检测73例胃腺癌组织及18例正常胃黏膜组织中E-cadherin,β-catenin,Cyclin D1蛋白的表达.结果正常胃黏膜组织中E-cadherin和β-catenin均呈清晰的棕褐色染色在上皮细胞细胞膜.E-cadherin和β-catenin在胃癌细胞中出现细胞质和/或细胞核异常染色,其异常表达率分别为63.01%(46/73)和56.16%(41/73),且两者的异常表达与胃腺癌的分化程度、TNM分期、浸润深度及淋巴结转移相关,与患者的性别、年龄、肿瘤大小无关.胃腺癌中E-cadherin和β-catenin表达密切相关.Cyclin D1在胃腺癌组织中的阳性表达率为67.12%(49/73),明显高于其在正常胃黏膜组织中的表达(0%,0/18),且与胃腺癌的分化程度和淋巴结转移相关.E-cadherin和β-catenin在胃癌中的异常表达与Cyclin D1的过表达呈显著的正相关(r=0.249,r=0.376,P＜0.05).结论胃腺癌中存在E-cadherin和β-catenin基因的失活及蛋白表达下调.E-cadherin和β-catenin的异常表达可能通过促使或激活Cyclin D1的过表达而参与胃癌的发生和发展.     

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.     

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.     

胃癌组织中KISS-1和MMP-9的表达及其意义

目的探讨肿瘤转移抑制基因K ISS-1及基质金属蛋白酶9（MMP-9）与胃癌侵袭、转移的关系,为研究胃癌的转移机制及治疗提供理论基础。方法采用逆转录聚合酶链反应（RT-PCR）检测36例胃癌组织及36例正常胃组织中K ISS-1 mRNA及MMP-9 mRNA的表达情况,分析其与胃癌患者各临床病理指标的关系及二者的相关性。结果 K ISS-1 mRNA在胃癌组织中的阳性表达率及表达水平均低于正常胃组织（P均〈0.01）,并且其低表达与淋巴结转移密切相关（P〈0.05）;MMP-9 mRNA在胃癌组织中的阳性表达率及表达水平均高于正常胃组织（P均〈0.05）,MMP-9 mRNA的高表达与癌的浸润深度和淋巴结转移密切相关（P均〈0.05）;K ISS-1与MMP-9表达呈负相关（P〈0.05）。结论 K ISS-1表达缺失和MMP-9过表达可能与胃癌的侵袭相关。     

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.     

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.     

Maspin expression and its clinicopathological significance in tumorigenesis and progression of gastric cancer

AIM:To investigate maspin expression in tumorigenesis and progression of gastric cancer and to explore its relevant molecular mechanisms.METHODS:Formalin-fixed and paraffin-embedded tissues from normal mucosa (n=182), dysplasia (n=69), cancer (n=l13) of the stomach were studied for maspin expression by immunohistochemistry. Microvessel density (MVD) in gastric cancer was labeled using anti-CD34 antibody. Maspin expression was compared with clinical parameters and MVD of tumors. Caspase-3 expression was also detected in gastric carcinoma by immunohistochemistry. The relationship between Caspase-3 and maspin expression was concerned as well.RESULTS:The positive rates of maspin expression were 79.8% (145/182), 75.4%(52/69) and 50.4%(57/113) in normal mucosa, dysplasia and cancer of the stomach,respectively.Cancer less frequently expressed maspin than normal mucosa and dysplasia (P&lt;0.05).Maspin expression showed a significantly negative association with invasive depth, metastasis, Lauren‘s and Nakamura‘s classification (P&lt;0.05),but not with tumor size, Borrmann‘s classification,growth pattern or TNIVl staging (P&gt;0.05). The positive rate of Caspase-3 was significantly lower in gastric cancer than in normal gastric mucosa (P&lt;0.05,32.7% vs 50.4%). It was noteworthy that maspin expression was negatively correlated with MVD, but positively correlated with expression of Caspase-3 in gastric cancer (P&lt;0.05).CONCLUSION:Down-regulated maspin expression is a late molecular event in gastric carcinogenesis. Reduced expression of maspin contributes to progression of gastric cancer probably by inhibiting cell adhesion, enhandng cell mobility,decreasing cell apoptosis and facilitating angiogenesis.Additionally altered expression of maspin underlies the molecular mechanism of differentiation of gastric cancer and supports the different histogenetic pathways of intestinal and diffuse gastric cancers. Maspin expression can be considered as an effective and objective marker to reveal biological behaviors of gastric cancer.     

胃癌组织MMP-9基因与血清中蛋白相关性研究

目的了解胃癌组织中基质金属蛋白酶-9（MMP-9）基因表达与术前血清中蛋白水平关系，探讨MMP-9表达与胃癌临床病理参数之间相关性。方法45例胃癌组织通过半定量逆转录聚合酶链反应（semi-RT-PCR）、免疫组织化学染色（IHC）、酶联免疫吸附（ELISA）方法检测组织中mRNA及蛋白表达情况，测定术前血清中蛋白水平。结果肿瘤组织基质金属蛋白酶-9mRNA表达程度、蛋白染色阳性率、血清中蛋白水平均显著高于正常对照组（P〈0．01）；胃癌组织蛋白表达阳性率与肿瘤是否侵犯至浆膜层相关（P〈0．05）；术前血清中蛋白水平与肿瘤TNM分期、淋巴结转移显著相关（P〈0．01）。结论检测基质金属蛋白酶-9表达对胃癌有一定诊断意义；胃癌组织中蛋白表达率及术前血清中蛋白水平对临床肿瘤病情评估具有指导意义；也许多种机制参与了胃癌术前血清中MMP-9蛋白的分泌。     

maspin、p27、skp2在大肠肿瘤的表达及意义

目的:探讨大肠癌maspin、p27、skp2的表达, 并探讨其与大肠癌发生、发展的关系．方法:应用免疫组化SP法检测30例结肠管状腺癌、20例结肠腺瘤、20例正常大肠黏膜组织中maspin、p27、skp2的表达情况．结果:30例管状腺癌中maspin、p27、 skp2阳性表达率分别为83．3％(25/30)、 50％(15/30)、36．7％(11/30);20例结肠腺瘤中maspin、p27、skp2的阳性表达率分别为 95％(19/20)、80％(16/20)、10％(2/20),20例正常切缘中maspin、p27、skp2的表达率分别为 95％(19/20)、90％(18/20)、5％(1/20)．maspin 表达与淋巴结转移(P=0．04)和Duke's分期相关(P=0．014);p27、skp2表达与分化程度相关(P=0．014,P=0．001),而与淋巴结转移、 Duke's分期、肿瘤浸润深度无关．maspin表达与p27表达正相关(r=0．447,P<0.05),与skp2 表达无相关性;p27表达与skp2表达无相关性．结论:maspin、p27在大肠癌中表达降低,skp2 在大肠癌中过表达,可作为反映大肠癌分化程度的指标之一．maspin可能在大肠癌的发生、发展(尤其是淋巴结转移)中起作用,有望成为诊断大肠癌及其发生淋巴结转移的分子生物学标记物之一．     

胃癌组织中P27表达与cyclin D1、cyclin E表达的相关性

目的:检测胃癌组织中P27的表达及其与cyclin D_1、cyclin E表达的相关性,并探讨其意义.方法:临床病理资料齐全的胃癌蜡块标本54例,正常胃黏膜标本15例,采用SP免疫组化方法检测P27、cyclin D和cyclin E在其中的表达.结果:胃癌组织54例中有20例P27表达阳性(37.0%),正常胃组织中15例有11例P27呈阳性表达(73.3%),胃癌组织与正常胃组织相比,P27的表达有明显差异(P<0.05),胃癌组织中P27的表达与患者的性别、年龄及肿瘤大小,浸润深度,分化程度无相关性(P>0.05),而与TNM分期及有无淋巴结转移明显相关(P<0.05),P27的表达与cyclin D_1的表达呈负相关(r=-0.332),而与cyclin E的表达无明显相关性(p>0.05).结论:胃癌组织中P27表达与正常胃组织有显著差异,胃癌组织中P27蛋白表达与淋巴结转移及临床分期密切相关,与cyclin E的表达呈负相关.     

结直肠腺癌病理分型的临床意义及预后分析

目的 探讨结直肠黏液腺癌、印戒细胞癌与乳头状、管状腺癌临床病理的差异和预后.方法 收集1994年8月至2007年3月结直肠手术患者2089例,其中黏液腺癌144例,印戒细胞癌25例,乳头状腺癌和管状腺癌1837例,剔除其他类型肠道肿瘤83例.比较三组的临床病理特点.对影响结直肠预后的部分临床病理指标,如年龄、肿瘤部位、分期、腹膜、病理分型进行单因素和非条件Logistic回归分析.对三组进行总体生存分析.结果 黏液腺癌患者发病的中位年龄为(54.20±16.25)岁,印戒细胞癌患者为(40.43±12.88)岁,乳头状腺癌和管状腺癌患者为(58.73±13.62)岁,印戒细胞癌发病年龄最低(P<0.001).三组男女比例、肿瘤直径、肿瘤部位、TNM分期、腹膜转移、淋巴结转移和脏器侵犯差异均有统计学意义(P值均<0.05).经单因素和非条件Logistic回归分析发现,黏液癌和印戒细胞癌是预示结直肠癌预后的危险因素,而印戒细胞癌是预示结直肠癌预后的独立因素.三组总体生存时间和生存率间差异有统计学意义(P<0.001).结论 结直肠黏液腺癌和印戒细胞癌预后较乳头状、管状腺癌差.黏液癌和印戒细胞癌是预示结直肠癌预后的危险因素.     

DNA ploidy analysis and expression of MMP-9, TIMP-2, and E-cadherin in gastric carcinoma

AIM: To investigate DNA ploidy and expression of MMP-9, TIMP-2, and E-cadherin in gastric carcinoma and to explore the mechanism of invasion and metastasis of gastric carcinoma. METHODS: Immunohistochemical methods were used to detect the expressions of MMP-9, TIMP-2, and E-cadherin in 156 cases, including 99 cases of gastric carcinoma, 16 cases of adjacent noncancerous mucosa, 16 cases of distant metastases and 25 cases of metastatic lymph node (LN) from gastric carcinoma. Flow cytometry DNA ploidy and S-phase fraction (SPF) analysis were performed on 57 cases, including 47 cases of gastric cancer, 6 cases of adjacent noncancerous mucosa, and 4 cases of distant metastatic cancer. RESULTS: The expression of MMP-9 was significantly correlated with Lauren's classification, Borrmann's classification, LN metastasis, tumor metastasis, and TNM stage, as well as depth of invasion (all P<0.05). The positive rate was lower in noncarcinoma than in carcinoma (31.3% vs66.7%, P<0.01). The expression of TIMP-2 was significantly correlated with Borrmann's classification, LN metastasis, and the depth of invasion (all P<0.05), The expression of E-cadherin was significantly correlated with differentiation, Lauren's classification, Borrmann's classification, and LN metastasis, as well as the depth of invasion (P<0,01 or P<0.05). E-cadherin was less expressed in carcinoma than in noncarcinoma (42.4% vs87.5%, P<0.01). There was a positive correlation between MMP-9 and TIMP-2 and a negative correlation between MMP-9 and E-cadherin, but no correlation between TIMP-2 and E-cadherin. Also there was a positive correlation between DNA aneuploid rate and differentiation and LN metastasis. SPF that was higher than 15% was positively correlated with tumor size, differentiation and LN metastasis. And there was a significant difference between carcinoma and noncarcinoma in DNA aneuploid rate and SPF. CONCLUSION: With tumor progression and development of heterogeneity, the abnormal expressions of MMP-9, TIMP-2, and E-cadherin or DNA aneuploid rate or high SPF gradually increases, suggesting that they play a crucial role in gastric carcinoma progression.