FGFR1和MMP3在食管鳞状细胞癌中的表达及临床意义

目的:观察成纤维细胞成长因子受体1(fibroblast growth factor receptor1,FGFR1)和基质金属蛋白酶3(matrix metalloproteinase 3,MMP3)基因和蛋白在食管鳞癌、癌旁及正常食管组织中的表达情况,探讨它们与食管鳞癌患者临床病理特征之间的关系.方法:采用RT-qPCR、Western blot和免疫组织化学染色检测78例食管鳞癌组织(鳞癌组)、35例食管鳞癌癌旁组织(癌旁组)及35例正常食管组织(正常组)中FGFR1和MMP3 mRNA及蛋白的表达,并分析其与肿瘤临床病理特征之间的关系.结果:FGFR1和MMP3 mRNA在食管鳞癌组表达水平显著高于癌旁组和正常组,差异具有统计学意义(P＜0.05).在癌旁组和正常组表达差异无统计学意义(P＞0.05).FGFR1和MMP3蛋白在食管鳞癌组中的表达率和表达水平明显高于癌旁组和正常组,差异具有统计学意义(P＜0.05).在癌旁组及正常组表达率及表达水平差异均无统计学意义(P＞0.05).FGFR1和MMP3蛋白在食管鳞癌中的表达与患者性别、年龄、肿瘤分化程度无关(P＞0.05),而与肿瘤浸润深度、淋巴结是否转移及TNM分期相关(P＜0.05).食管鳞癌中,FGFR1和MMP3的蛋白表达呈正相关(r=0.303,P＜0.05).结论:FGFR1和MMP3在食管鳞癌中均高表达,两者可能与食管癌的侵袭和转移有关.     

蛋白质组学方法筛选早期肺鳞癌相关蛋白

目的:应用蛋白质组学技术筛选早期肺癌癌变相关蛋白.方法:利用双向凝胶电泳方法分离人早期肺鳞癌组织和相应癌旁正常组织总蛋白,选择差异蛋白质点进行质谱分析.免疫组织化学法验证部分差异蛋白质的表达差异.结果:肺鳞癌组织与癌旁正常组织的双向凝胶电泳图谱中平均蛋白质点数分别为626和602个.选择在癌组织中高表达的10个差异蛋白点进行质谱分析,最终鉴定为膜联蛋白1 (annexin-1, Anx-A1)、热休克蛋白27(heat shock protein 27, HSP27)等与细胞周期、信号转导等功能相关的蛋白质.免疫组织化学检测结果显示,Anx-A1和HSP27蛋白在肺鳞癌组织中的阳性表达率均显著增高(P<0.05).结论:蛋白质组学方法是一种应用于初步筛选早期肺癌相关蛋白的有效方法,所鉴定的蛋白为进一步筛选用于肺癌早期诊断及其治疗的分子标志物奠定了前期基础.     

PFTK1在食管鳞癌组织中的表达及意义

目的 探讨PFTK1在食管鳞癌组织中的表达及意义.方法 采用免疫组化S-P法检测53例食管鳞癌组织、21例癌旁不典型增生组织和25例正常食管黏膜组织中PFTK1蛋白的表达;应用原位杂交技术检测53例食管鳞癌组织、21例癌旁不典型增生组织和25例正常食管黏膜组织中PFTK1 mRNA的表达.结果 食管鳞癌组织中PFTK1蛋白、mRNA表达明显高于癌旁不典型增生组织和正常食管黏膜组织,差异均有统计学意义(P均<0.05).食管鳞癌组织中PFTK1蛋白、mRNA的阳性表达率与食管鳞癌分化程度、浸润深度及淋巴结转移有关(P均<0.05),而与性别、年龄无关(P均>0.5).结论 PFTK1的表达与食管鳞癌的发生、发展有关,其表达的升高可能促进食管鳞癌的发生、发展.     

p38MAPK在肺鳞癌组织中的表达及临床意义

目的:探讨丝裂原活化蛋白激酶p38(p38MAPK)在肺鳞癌组织中的表达及意义。方法:采用real-time PCR检测肺鳞癌(lung squamous cell carcinoma,LSCC)患者癌组织和癌旁正常肺组织(non-tumor adjacenttissues,NAT)中p38MAPK mRNA表达水平;Western blot法检测p38MAPK(p38)和磷酸化p38MAPK(P-p38)蛋白表达水平,免疫组织化学法检测p38和P-p38在肺鳞癌组织中的定位。应用SPSS12.0软件分析与临床病理参数的关系。结果:肺鳞癌组织中p38MAPK mRNA和蛋白表达水平与对照组间均无明显差异(P>0.05)。癌旁正常肺组织中P-p38蛋白表达为(0.14±0.03),肺鳞癌组织中为(0.45±0.04),差异有统计学意义(P<0.05);P-p38蛋白表达与和肺鳞癌的组织分级程度呈正相关,与临床分期呈负相关(P<0.05)。结论:p38MAPK只有经过磷酸化活化后才发挥功能,即P-p38。P-p38可能在肺鳞癌的发生和发展中起到抑制作用,可以作为肺鳞癌的早期诊断和治疗的参考指标。     

胰腺癌组织中转化生长因子β诱导蛋白表达及临床意义

  目的  探讨胰腺癌组织中转化生长因子β诱导蛋白(TGFBIp/βig-h3)mRNA和蛋白表达水平及其意义。  方法  收集15例胰腺癌术后的患者癌组织、癌旁组织以及4例正常胰腺组织标本, 提取胰腺组织标本总RNA, 利用半定量逆转录聚合酶链反应(RT-PCR)检测胰腺组织标本TGFBIp mRNA水平; 应用Western blot检测TGFBIp蛋白表达水平。  结果  胰腺癌组织TGFBIpmRNA及蛋白表达水平明显高于癌旁胰腺组织及正常胰腺组织(P < 0.01)。在不同分化程度的胰腺癌组织中, TGFBIp mRNA及蛋白表达水平差异无统计学意义(P>0.05);Ⅲ~Ⅳ期及有淋巴结转移胰腺癌组织中TGFBIp mRNA及蛋白表达水平明显高于Ⅰ~Ⅱ期及无淋巴结转移胰腺癌组织, 差异有统计学意义(P < 0.05)  结论  TGFBIp高表达与胰腺癌的发生发展相关, 其可能的调控机制及生物学效应有待进一步研究。      

食管鳞癌组织垂体瘤转化基因表达及其临床意义的研究

目的:探讨食管鳞癌组织中垂体瘤转化基因(PTTG)mRNA及其蛋白的表达?与肿瘤临床病理特征的关系.方法:采用RT-PCR技术检测30例食管鳞癌及相应的30例癌旁组织中PTTG mRNA的表达,同时采用免疫组织化学SP法检测标本中PTTG蛋白的表达.结果:在食管鳞癌组织中PTTGmRNA的阳性表达率(93.3%)及平均表达水平(0.69±0.06)显著高于相应的癌旁正常组织(70.0%和0.32±0.06),两组比较差异有统计学意义,P<0.01.PTTG蛋白在食管鳞癌组织中的阳性表达(83.3%,25/30)明显高于在癌旁组织中的阳性表达(20.0%,6/30),P<0.01;并与淋巴结转移、TNM分期和分化程度有关.结论:PTTG基因异常表达可对食管鳞癌的发生和发展起重要作用,可能为食管鳞癌的早期诊断和基因治疗提供新的靶点.     

RKIP在肺鳞癌组织中的表达及其意义

背景与目的 Raf激酶抑制蛋白(Raf kinase inhibitor protein,RKIP)属于磷脂酰乙醇胺结合蛋白家族的成员,可干扰Raf-1-MEK1/2-ERK1/2信号通路,抑制NF-κB和G蛋白偶联受体激酶等信号传导过程,且RKIP的表达减弱或丢失与多种肿瘤的发生发展以及侵润转移相关。本研究旨在探讨RKIP在肺鳞癌组织中的表达及其与肺鳞癌临床病理的相关性。方法应用RT-PCR方法检测56例肺鳞癌组织及其癌旁正常组织中RKIP基因的表达,计算其阳性率;并用Western blot方法检测肺鳞癌组织及其癌旁正常组织中RKIP蛋白的表达变化。结果 RKIP mRNA在肺鳞癌组织中表达的阳性率明显低于癌旁正常组织(P<0.05),在有淋巴结转移者中的表达阳性率明显低于无淋巴结转移者(P<0.05),但与患者的性别、年龄、肿瘤的大小及分化程度无明显关系(P>0.05)。RKIP蛋白在肺鳞癌组织中表达明显低于癌旁正常组织(P<0.05)。结论 RKIP的低表达可能与肺鳞癌的发生及侵袭转移有关。     

TUBB3在食管鳞癌组织中的表达及临床意义

目的:探讨TUBB3(Ⅲ型β微管蛋白3)蛋白在食管鳞癌及癌旁正常组织中的表达及临床意义。方法:免疫组化法检测50例食管鳞癌及癌旁正常组织中TUBB3蛋白的表达,分析TUBB3蛋白表达与临床病理因素的关系。结果:TUBB3蛋白在食管鳞癌组织中表达率64%明显高于癌旁正常组织14%(P<0.05)。TUBB3蛋白在Ⅲ期食管癌中的阳性表达率高于Ⅰ-Ⅱ期(P<0.05),在高分化食管癌中的阳性表达率明显低于中、低分化食管癌(P<0.05)。TUBB3蛋白的表达与患者的年龄、性别、浸润深度以及淋巴结转移无明显关系(P>0.05)。结论:TUBB3蛋白表达在食管癌的发生、发展中有一定作用,其检测有助于食管癌诊断、治疗及预后评估。     

食管鳞癌组织中RECK mRNA和蛋白的表达及意义

目的:探讨食管鳞癌组织中RECK mRNA和蛋白的表达情况及其与临床病理因素的关系.方法:应用RT-PCR和免疫组化SP法检测62例食管鳞癌组织、31例癌旁不典型增生组织及62例正常食管粘膜组织中mRNA和蛋白的表达.结果:在食管鳞癌癌变过程中RECK在癌组织、癌旁不典型增生组织及正常粘膜组织中mRNA的含量依次增高,分别为1.052±0.078、1.274±0.235、1.306±0.121,组间比较有明显差异(F=49.936,P＜0.05):不同分化程度、不同浸润深度及有无淋巴结转移的食管鳞癌组织之间RECK mRNA相对含量差异均有统计学意义(F=5.081,F=26.084,U=24.011,P均＜0.05).食管鳞癌组织及癌旁不典型增生组织中RECK蛋白表达均低于正常粘膜组织,表达量分别为59.7%(37/62)、71.0%(22/31)、85.5%(53/62),组间比较有明显差异(x2=10.331,P＜0.01);食管鳞癌组织中RECK蛋白表达与癌组织的分化程度、不同浸润深度及有无淋巴结转移密切相关(P＜0.05).结论:食管鳞癌组织中RECK mRNA和蛋白表达均降低,其低表达可能与食管鳞癌发生有关.检测RECK mRNA及蛋白的表达可望成为食管鳞癌早期诊断和判断预后的分子指标之一.     

食管鳞癌中CAV-1基因的表达及甲基化状态

背景与目的：作为重要的表观遗传学现象之一,DNA甲基化对基因表达发挥着重要的调控功能。研究表明肿瘤细胞基因组正常DNA甲基化模式异常改变所导致的肿瘤相关基因功能异常可能参与肿瘤发生与发展。本研究通过检测食管鳞状细胞癌(esophageal squamous cell carcinomas,ESCC)组织中质膜微囊蛋白-1(caveolin-1,CAV-1)基因的表达及甲基化状态,探讨CAV-1基因在食管鳞癌发生及发展中的作用。方法：分别应用甲基化特异性PCR(MSP)、RT-PCR法、免疫组织化学SP法检测食管癌及相应癌旁正常黏膜组织标本中CAV-1基因甲基化状态、mRNA及蛋白表达情况。结果：CAV-1 mRNA在食管癌和癌旁正常组织中的表达量分别为0.86±0.56和0.40±0.36,食管癌组织中CAV-1 mRNA表达量明显高于癌旁正常组织,2者差异有统计学意义(P<0.05)。CAV-1 mRNA表达与患者的淋巴结转移及肿瘤组织学分级有关(P<0.05);食管鳞癌组织中,CAV-1蛋白表达阳性率为66.7%(34/51);显著高于正常食管黏膜组织(15.7%,8/51)(P<0.01)。CAV-1蛋白表达与患者的淋巴结转移有关(P<0.05),而与肿瘤的临床分期和分化程度无关(P>0.05)。51例食管癌组织中1例发生了基因启动子区甲基化,甲基化率为2.0%(1/51);而相应癌旁正常黏膜组织中未发现有该基因的甲基化现象。食管癌组织中该基因的甲基化率与相应癌旁正常组织相比,差异无统计学意义(P>0.05)。结论：CAV-1基因在食管鳞癌组织中mRNA及蛋白表达均明显高于癌旁正常黏膜组织,该基因的高表达对于肿瘤的发生及淋巴结的转移起到了一定的促进作用;癌及癌旁组织中该基因的表达异常均与该基因的甲基化状态无关。     

The relationship between Bmi-1 and the epithelial–mesenchymal transition in lung squamous cell carcinoma

This study aimed to investigate the expression of Bmi-1 in lung squamous cell carcinoma tissues and the relationship between Bmi-1 and the epithelial-mesenchymal transition. RT-PCR and western blot analysis were performed to detect the expression of Bmi-1, E-cadherin, and Vimentin in 56 cases of lung squamous cell carcinoma tissues and adjacent normal tissues. The positive rates of Bmi-1, E-cadherin, and Vimentin mRNA expression in lung squamous cell carcinoma tissues were 73.2, 42.9, and 58.9%, respectively; compared to the expression of these genes in adjacent normal tissues (14.3, 75.0, and 28.6%), the differences were significant (P < 0.05). The expression of Bmi-1 in lung squamous cell carcinoma tissues showed a negative correlation with that of E-cadherin (r = -0.372, P = 0.005) and a positive correlation with that of Vimentin (r = 0.315, P = 0.02). The expression of Bmi-1 and Vimentin mRNA and protein in lung squamous cell carcinoma tissues was significantly higher than that in adjacent normal tissues (P < 0.05), and the expression of Bmi-1 and Vimentin in patients with lymph node and distal metastasis was significantly higher than that in patients without lymph node and distal metastasis (P < 0.05). The expression of E-cadherin mRNA and protein in lung squamous cell carcinoma tissues was significantly lower than that in adjacent normal tissues (P < 0.05), and the expression in patients with lymph node and distal metastasis was significantly lower than that in patients without lymph node and distal metastasis (P < 0.05). The expression of Bmi-1, E-cadherin, and Vimentin was not associated with the patient's sex, age, tumor size or degree of tumor differentiation (P > 0.05). The increase in Bmi-1 expression was accompanied by the down-regulation of E-cadherin expression and up-regulation of Vimentin expression. Bmi-1 may be associated with the epithelial-mesenchymal transition in lung squamous cell carcinoma and the occurrence, invasion, and metastasis of lung squamous cell carcinoma.     

Expression and Significance of RKIP and E-cadherin in Lung Squamous Cell Carcinoma

The purpose of this study was to investigate the expression of Raf kinase inhibitor protein (RKIP) and epithelial cadherin (E-cadherin) in lung squamous cell carcinoma tissue and its correlation with the clinical pathology of lung squamous cell carcinoma. RKIP and E-cadherin mRNA (by RT-PCR) and protein (by western blotting) levels were monitored in carcinoma tissues and surrounding normal tissues from 86 lung squamous cell carcinoma cases, and their positive rates were calculated. The rates of positive RKIP and E-cadherin mRNA expression were significantly lower in lung squamous cell carcinoma than in the surrounding normal tissues (P?<?0.05). The positive expression rates were significantly lower in those with lymph node metastasis than in those without (P?<?0.05). The lower the degree of tumor differentiation, the lower the E-cadherin mRNA positive expression rate (P?<?0.05). The rates of positive RKIP and E-cadherin mRNA expression were significantly lower in patients at advanced (III, IV) stages than in patients at early (I, II) stages (p?<?0.05); this rate, however, was independent of gender, age, and tumor size (P?>?0.05). The protein levels of RKIP and E-cadherin were significantly lower in lung squamous cell carcinoma than in the surrounding normal tissues (P?<?0.05). The levels were significantly lower in patients with lymph node metastasis than in those without it (P?<?0.05). The lower the degree of tumor differentiation, the lower the protein level of E-cadherin (P?<?0.05). Both RKIP and E-cadherin are tumor suppressors, their low expression levels may be associated with initiation, invasion and/or metastasis, as well as with the inhibition of lung squamous cell carcinoma differentiation.     

Expression of caveolin-1 is correlated with disease stage and survival in lung adenocarcinomas

Caveolin-1 (cav-1) has been implicated in the development of human cancers. However, the distribution of cav-1 in non-small cell lung cancer (NSCLC) and its signi?cance require further study. Real-time PCR and Western blot assays were performed to detect cav-1 mRNA and protein levels in tumor tissues (TT) and matched tumor-free tissues (TF). The protein expression in 115 paraffin-embedded blocks was examined by immunohistochemical staining (IHC). Correlations between cav-1 mRNA and protein expression by IHC and clinicopathological features were statistically evaluated. For the 136 patients examined, the levels of cav-1 mRNA and protein expression were significantly lower in lung TT compared to matched TF (P<0.05). High cav-1 expression was detected in 60 of 115 (52.2%) NSCLC tissues and this level was significantly lower than cav-1 expression in non-cancerous lung tissues (15 of 19, 78.9%, P<0.05). Up-regulation of cav-1 mRNA expression in lung adenocarcinoma (AC) (29.7%) was higher than that observed in lung squamous cell carcinoma (SCC) (15.8%). Statistical analysis of the correlation between cav-1 protein expression and clinical features showed a statistical association with poorer N-stage (P=0.032) and higher pathological TNM stage (P=0.012) in lung AC patients, that was not found in lung SCC patients. Moreover, lung AC patients with higher cav-1 expression showed significantly shorter life-spans than those with lower cav-1 expression (P=0.032, log-rank test). The levels of cav-1 mRNA and protein expression were significantly lower in lung cancers when compared to matched TF or non-cancerous lung tissues. The higher protein expression correlated with the advanced pathological stage and shorter survival rates in lung AC patients.     

3-磷酸甘油酸脱氢酶在宫颈鳞状细胞癌中高表达

目的:检测宫颈鳞状细胞癌组织和细胞中3-磷酸甘油酸脱氢酶(3-phosphoglycerate dehydrogen-ase,PHGDH)的表达水平,探讨其在肿瘤发生发展中的作用.方法:使用实时荧光定量PCR法和免疫组织化学法检测宫颈鳞状细胞癌和正常宫颈组织中PHGDH mRNA转录水平和蛋白翻译水平;利用实时荧光定量...     

叉头框蛋白Q1在宫颈鳞癌中的表达及其临床意义

目的:探讨叉头框蛋白Q1(forkhead box Q1,FOXQ1)在宫颈鳞癌细胞系及组织中的表达及其与患者临床病理特征和预后的关系。方法:采用RT-PCR和Western blot检测宫颈鳞癌细胞系SiHa和CaSki及人宫颈永生化鳞状细胞系Ect1/E6E7中FOXQ1 mRNA和蛋白的表达情况;分别应用RT-PCR及免疫组化法检测60例宫颈鳞癌组织中FOXQ1 mRNA和蛋白的表达情况;进一步采用Log-rank检验和Cox回归模型对宫颈鳞癌患者的预后因素进行分析,并用Kaplan-Meier计算不同FOXQ1表达情况下患者的生存率曲线。结果:与Ect1/E6E7相比,SiHa和CaSki中FOXQ1 mRNA和蛋白的表达水平均显著上调（P<0.05）;宫颈鳞癌组织中FOXQ1 mRNA的表达水平显著高于配对癌旁组织（3.096±0.109 vs 0.902±0.040,P<0.01）;免疫组化结果显示,FOXQ1蛋白在宫颈鳞癌组织中高表达,阳性率为68.33%,且FOXQ1蛋白的表达与肿瘤浸润深度、淋巴结转移、淋巴脉管浸润及FIGO分期有关（P<0.05）,而与患者的年龄、肿瘤分化程度和肿瘤大小无关（P<0.05）;Kaplan-Meier 单因素分析显示,FOXQ1蛋白是宫颈鳞癌患者的重要预后因素（P<0.05）,进一步Cox多因素回归分析显示FOXQ1蛋白是影响宫颈鳞癌患者的独立预后因素（HR=2.703,95%CI:1.081~6.758,P<0.05）。结论:FOXQ1的高表达可能与宫颈鳞癌的发生、发展及预后关系密切,有望成为评估宫颈鳞癌预后的有效指标。     

肺癌组织中多药耐药基因及相关蛋白表达的研究

目的:探讨P-糖蛋白(P-glycopro-tein,P-gp)、肺癌耐药蛋白(lung cancer resis-tence protein,LRP)和多药耐药相关蛋白(multidrug resistence protein,MRP)在肺癌组织中的表达及其临床意义。方法:应用SP法检测116例术前未做化疗的肺癌组织中P-gp、LRP和MRP的表达水平。结果:P-gp在腺癌组织中的阳性表达率为78.26%(36/46),小细胞癌为63.64%(7/11),鳞状细胞癌为47.46%(28/59);三者相比差异有统计学意义,P=0.018。LRP在腺癌组织中的阳性表达率为89.13%(41/46),鳞状细胞癌为44.07%(26/59),小细胞癌为27.27%(3/11);三者相比差异有统计学意义,P=0.0001;MRP在不同癌组织中的表达差异无统计学意义,P=0.4165。在腺癌、鳞状细胞癌和小细胞癌组织中同时有两种或两种以上耐药基因产物表达阳性率分别为89.13%(41/46)、49.15%(29/59)和27.28%(3/11),三种类型间比较差异有统计学意义,P=0.0001。结论:不同组织学类型的肺癌存在不同程度的耐药性,检测P-gp、LRP和MRP的协同表达对于指导临床化疗方案的实施有重要意义。