Livin、Smac在肝癌中的表达及与凋亡、增殖的关系

目的探讨肝癌中Livin、Smac蛋白的表达及其与细胞凋亡、增殖的关系。方法应用免疫组化二步法检测肝癌及相应癌旁肝硬化组织各41例、肝血管瘤旁正常对照组织9例中Livin、Smac及PCNA的表达;应用TUNEL法检测肝细胞的凋亡。结果 41例肝癌中Livin、Smac的阳性率分别46.34%、34.14%,相应癌旁肝硬化组织中分别为24.39%、56.10%,正常对照组织中分别为0%、77.8%,肝癌中Livin、Smac的阳性率与非癌肝组织相比差异均有统计学意义（P〈0.05）;肝癌中Livin的表达与肝癌的转移与否有相关性（P〈0.05）,二者与肿瘤细胞的凋亡增殖比均有相关性（P〈0.05）;Livin和Smac在肝癌中的表达呈负相关（rs=-0.360,P〈0.05）。结论 Livin的相对高表达,Smac的相对低表达或表达缺失在一定程度上打破了肝癌中细胞凋亡与增殖的动态平衡,在肝癌的形成过程中起重要的作用。     

PTEN、Smac和LIVIN在胃癌组织中的表达及其临床意义

目的 研究PTEN、Smac和LIVIN在人胃癌组织中的表达,初步探讨其临床意义.方法 采用免疫组化SP法检测75例胃癌标本黏膜组织中PTEN、Smac和LIVIN蛋白的表达,胃溃疡或十二指肠溃疡患者胃黏膜组织作为正常对照组.结果 胃癌组织中LIVIN的表达率显著高于正常胃黏膜组织,PTEN及Smac的表达率则低于正常胃黏膜组织(P均<0.01);LIVIN与Smac、PTEN的表达呈负相关(P均<0.01),PTEN与Smac的表达呈正相关(P<0.01);PTEN、Smac和LIVIN的阳性表达率与肿瘤淋巴转移、临床分期、病理分化程度及浸润深度密切相关.结论 LIVIN、PTEN及Smac有可能成为胃癌临床诊断、判断疗效及监测预后的可靠指标.     

髓样分化因子MyD88在食管癌组织中的表达及意义

目的探讨髓样分化因子MyD88在食管癌组织中的表达及意义。方法采用免疫组织化学方法检测75例食管癌患者癌组织及其癌旁正常组织中的MyD88蛋白表达,并探讨其临床意义。结果 MyD88在食管癌组织中的阳性表达率为92.0%,明显高于癌旁正常组织中的阳性表达率17.3%（P〈0.05）;MyD88的阳性表达与食管癌患者的年龄、性别、分化程度及肿瘤大小无关（P均〉0.05）,与临床分期和淋巴结转移呈正相关（P均〈0.05）。结论 MyD88参与食管癌的发病机制,与患者的病情及严重程度有关。     

凋亡抑制蛋白Livin和促凋亡因子Smac在胃肠道间质瘤中的表达及意义

目的研究胃肠道间质瘤（GIST）中Livin和SmacmRNA的表达,探讨二者相关性。方法采用RT-PCR方法检测124例GIST患者的Livin和SmacmRNA的表达水平,并进行比较分析。结果Livin在癌旁组织未检出阳性结果,Smac在癌旁组织中高表达（P〈0．05）;Livin、SmacmRNA表达与性别、年龄、黏膜受侵以及组织学类型无关,与NIH分级、淋巴结转移有关;Livin与Smac表达呈负相关。结论Livin高表达、Smac低表达共同促进GIsT的发展,有望成为GIST发生的预测指标。     

Smac/DIABLO和bcl-2在胰腺癌中的表达及意义

目的探讨线粒体促凋亡因子Smac/DIABLO和凋亡抑制基因bcl-2的表达情况及其与胰腺癌患者临床病理特征的关系。方法应用荧光实时定量RT-PCR及免疫组织化学技术分别检测正常胰腺组织、胰腺癌组织Smac/DIABLO及bcl-2的表达。结果 Smac/DIABLO mRNA在正常胰腺组织中的表达高于胰腺癌(P<0.05)。在胰腺癌组织中,Smac/DIABLO mRNA在Ⅰ～Ⅱ期患者癌组织标本中的表达明显高于Ⅲ～Ⅳ期(P<0.05)。正常胰腺组织中导管上皮细胞bcl-2染色阳性8例(80.00%)。48例胰腺癌bcl-2蛋白阳性表达35例(72.92%),低于正常胰腺组织阳性表达率(80.00%),但二者无统计学差异(P>0.05)。结论 Smac/DIABLO表达的降低与胰腺癌的发生、发展可能密切相关。     

食管鳞癌组织中Smac、survivin的表达及其临床意义

目的 探讨Smac及survivin在食管鳞癌中的表达变化及其对食管癌预后的判断价值.方法 采用免疫组化方法 测定食管鳞癌组织及癌周正常食管组织中的Smac、survivin.结果 Smac在癌周正常食管组织中阳性表达高于在癌组织中的表达,survivin在癌周正常食管组织中阳性表达低于在癌组织中的表达;Smae在长期生存的食管癌患者中多呈高表达,survivin多呈低表达.Smac与survivin在食管鳞癌中的表达呈负相关(r=-0.288,P=0.013).结论 Smae及survivin可能是食管鳞癌细胞凋亡信号传导网络中的重要因子,是判断食管鳞癌预后的重要指标.     

食管鳞癌组织中树突细胞CD83和促凋亡蛋白Smac的表达及其临床意义

目的探讨肿瘤浸润树突细胞(TIDC)CD83和促凋亡蛋白Smac在食管鳞癌(ESCC)组织中的表达及其与ESCC临床病理特征间的关系。方法选取经病理确诊的78例ESCC石蜡标本,采用流式细胞术检测78例ESCC、24例正常食管黏膜中TIDC和Smac表达。结果 ESCC组织中CD83表达量明显低于正常黏膜的表达量(P<0.05);Smac的表达量明显低于正常黏膜的表达量(P<0.01);CD83表达量与肿瘤临床分期及淋巴结转移有关(P均<0.05);Smac表达量与肿瘤浸润深度、临床分期及淋巴结转移有关(P均<0.01);CD83和smac在食管鳞癌组织中表达呈正相关。结论 ESCC组织中TIDC的CD83表达量反映ESCC局部免疫状态,CD83和促凋亡蛋白Smac在ESCC的发生、发展过程中具有重要作用,可作为评价食管癌生物学行为的指标。     

ZNF282蛋白在食管鳞癌中的表达及预后的意义

目的探讨ZNF282蛋白在食管鳞癌诊断及预后的临床病理学意义。方法采用免疫组织化学染色法检测35例正常食管黏膜组织和93例食管鳞癌中ZNF282蛋白的表达情况,分析其表达与患者年龄、性别、肿瘤大小、病理学分期、分化、淋巴结转移和临床分期、生存率之间的关系。结果在正常食管黏膜组织中ZNF282蛋白主要表达于基底层细胞核内,在食管鳞癌组织中ZNF282蛋白表达于鳞癌细胞核,表达较强,其阳性表达率为47.3%;ZNF282蛋白表达在有淋巴结转移的鳞癌组明显高于无转移组(P0.05),有复发的鳞癌组明显高于无复发组(P0.01),死亡的鳞癌组明显高于生存组(P0.001);ZNF282阳性组患者生存率明显低于阴性组(P0.001);ZNF282蛋白表达与食管鳞癌患者的年龄、性别、肿瘤大小、分化、T分级、肿瘤的远处转移均无相关关系。结论 ZNF282蛋白在食管鳞癌中高表达,其表达与鳞癌淋巴结转移、肿瘤复发及患者的生存率有密切关系,可以成为诊断及判定食管鳞癌预后的重要参考指标。     

食管鳞状细胞癌中Survivin和Smac蛋白的表达及与临床病理的关系

目的探讨食管鳞状细胞癌中Survivin和Smac蛋白的表达及与临床病理的关系。方法收集该院2013年5月至2014年6月行手术治疗的60例食管鳞状细胞癌患者手术存档标本,使用免疫组化法检测Survivin和Smac蛋白在癌细胞组织及正常组织中的表达,同时比较Survivin和Smac蛋白表达与食管鳞状细胞癌临床病理特征的关系,分析Survivin和Smac蛋白表达的相关性。结果食管鳞状细胞癌组织中Survivin阳性表达率为70.0%,明显高于癌旁正常组织23.3%(P<0.05);而Smac蛋白在食管鳞状细胞癌组织中阳性表达率为66.7%,低于周围正常组织88.3%(P<0.05)。Survivin蛋白的表达与患者TNM分期、浸润程度呈明显相关性,在Ⅲ期及深层浸润组织中阳性表达率明显高于Ⅰ期及浅层浸润组织(P<0.05);Smac蛋白表达与患者TNM分期呈明显相关性,其在Ⅲ期中阳性表达率明显低于Ⅰ期(P<0.05);在食管鳞状细胞癌中,Survivin的表达明显高于Smac蛋白表达,两者呈明显负相关性(r=-0.397,P=0.009)。结论 Survivin和Smac蛋白的表达与食管鳞状细胞癌的发生发展具有一定相关性,可作为治疗及预后预测的重要指标。     

Smac／DIABLO与消化系统肿瘤关系的研究进展

Smac/DIABLO （the second mitochondrial activator of caspase/direct IAP binding protein with low pI）是一种新发现的线粒体蛋白,在细胞发生凋亡时,与细胞色素c一起被线粒体释放到胞质中,与IAPs结合,解除IAPs对caspase的抑制,从而诱导细胞凋亡。Smac这种促凋亡作用对消化系统肿瘤的发生、发展以及肿瘤的治疗具有重要意义。     

mir-183在食管鳞癌中的表达水平及其与临床病理、预后的关系

目的:探讨原发性食管鳞癌(esophageal squamous cell carcinoma,ESCC)组织中mir-183的表达状况及其与食管鳞癌临床病理特征之间的关系.方法:应用实时RT-PCR方法及2-△△CT分析法分别检测ESCC患者癌组织及癌旁正常组织中mir-183的表达状况及其与临床病理特征的相关性.结果:在53例标本中,有22例(41.51%)mir-183高表达(2-6411倍),mir-183的高表达分别与患者的淋巴结转移情况及不良预后有显著统计学意义(P<0.05).结论:mir-183的高表达在ESCC的发生发展中发挥重要作用.     

Correlation between expression of human telomerase subunits and telomerase activity in esophageal squamous cell carcinoma

AIM: To investigate telomerase activity and hTERT, TP-1 expression and their relationships in esophageal squamouscell carcinoma (ESCC).METHODS: Telomerase activity was measured in 60 ESCCtissues using telomeric repeat amplification protocol (TRAP)assay by silver staining. In situ hybridization was used for detecting hTERT and TP-lmRNA.RESULTS: The telomerase activity was detected in 83.3 % of ESCC tissues. The difference of telomerase activity was significant between well and poorly cancer differentiated lesions (P<0.05). The positive rate of telomerase activity was higher in patients with lymphatic metastasis than in patients without lymphatic metastasis. In cancer tissues hTERT mRNA expression was 75 % and TP-1 mRNA expression was 71.7 %. The expression of hTERT, TP-1 mRNA in well and poorly differentiated carcinoma was not significant. The expression of hTERT mRNA was correlated with telomerase activity, but TP-1 mRNA expression was not correlated with it.CONCLUSION: Telomerase activity and hTERT, TP-1 mRNA expression are up-regulated in ESCC. Telomerase activity in ESCC is correlated with lymphatic metastasis and cancer differentiation. Telomerase activity may be used as a prognostic marker in ESCC. hTERT mRNA expression is correlated with telomerase activity. Enhanced hTERT mRNA expression may initially comprehend the telomerase activity level, but it is less sensitive than TRAP assay.     

High expression of PDGFA predicts poor prognosis of esophageal squamous cell carcinoma

Platelet-derived growth factor A (PDGFA), the most known member of PDGF family, plays a crucial role in occurrence and progression of different tumors. However, PDGFA expression and its clinical significance in esophageal squamous cell carcinoma (ESCC) are not clear. The present study aimed to assess the expression and prognostic value of PDGFA in ESCC.The Gene Expression Omnibus databases ({"type":"entrez-geo","attrs":{"text":"GSE53625","term_id":"53625"}}GSE53625, {"type":"entrez-geo","attrs":{"text":"GSE23400","term_id":"23400"}}GSE23400, and {"type":"entrez-geo","attrs":{"text":"GSE67269","term_id":"67269"}}GSE67269) and fresh clinical samples were employed for detecting PDGFA messenger RNA expression in ESCC. The associations of PDGFA expression with clinicopathological characteristics were evaluated by chi-square test. Kaplan–Meier analysis and Cox proportional hazard regression model were performed to determine the prognostic value of PDGFA in ESCC patients. PDGFA-related signaling pathways were defined by gene set enrichment analysis based on Gene Expression Omnibus databases.The PDGFA messenger RNA expression was upregulated in ESCC tissues compared with paired adjacent noncancerous tissues (P < .05) and was positively correlated with T stage (P < .05). Kaplan–Meier survival analysis suggested that ESCC patients with high PDGFA expression were associated with poorer overall survival compared to those with low PDGFA expression (P < .05), especially in advanced T stage (P < .05). Cox analyses showed that high expression of PDGFA was an independent predictor for poor prognosis in ESCC patients. Gene set enrichment analysis identified 3 signaling pathways (extracellular matrix receptor interaction, focal adhesion, and glycosaminoglycan biosynthesis chondroitin sulfate) that were enriched in PDGFA high expression phenotype (all P < .01).PDGFA may serve as an oncogene in ESCC and represent an independent molecular biomarker for prognosis of ESCC patients.     

食管鳞癌survivin表达与放化疗近期疗效的关系

目的:探讨survivin表达情况与食管鳞癌原发灶的放化疗反应的关系.方法:用免疫组化法检测112例食管鳞癌中survivin的表达情况,回顾性分析胞质和胞核的survivin表达与放化疗近期疗效及放化疗后降期情况的关系.结果:survivin的表达可见于肿瘤细胞的胞质或/和胞核内,其中胞核表达率为67.8%,胞质表达率为65.2%:胞质survivin表达与近期疗效无明显关系.而胞核survivin阴性者放化疗的中期有效率明显高于阳性者(80.6% vs 46.1%,P=0.026).术前放化疗组中,核survivin阳性者与阴性者放化疗后降期的比例分别为7/17和4/4.结论:检测核survivin的表达情况可能作为预测食管鳞癌对放化疗疗效的有效参考指标.     

鸟氨酸脱羧酶与食管鳞癌血管生成相关性的研究

目的 研究ODc mRNA和MVD在食管鳞癌中的表达及相关关系,探讨ODC在食管鳞癌血管生成中的可能作用及其与肿瘤浸润和转移的关系。方法 研究对象为41例经手术和病理证实的食管鳞癌患者,用RT-PCR方法测定癌组织和相应癌旁正常组织的ODC mRNA表达,以β-actin做内参照求得各自T/N值;用免疫组化方法测定癌组织和癌旁正常组织的MVD的T/N值。结果 在41例中,39例ODc mRNA的T/N值>1.0,占95.1％;40例MVD的T/N值>1.0,占97.6％。ODC mRNA和MVD与食管鳞癌的肿瘤大小、浸润深度和淋巴结转移有关,ODC mRNA与肿瘤分化程度有关。ODC mRNA的T/N值与MVD的T/N值正相关。结论 ODC与食管鳞癌血管生成和肿瘤浸润转移密切相关。ODC可能是通过影响血管生成而促进食管鳞癌的浸润和转移。     

hMLH1和RASSF1A在食管癌组织中的表达及其与患者预后的关系

目的:探讨食管鳞癌组织中从hMLH1和RASSF1A基因表达及其对预后的影响.方法:采用原位杂交技术检测hMLH1基因、免疫组织化学法检测RASSF1A基因在60例食管鳞癌患者中的表达,应用Cox回归模型和Kaplan-Meier生存曲线分析其与患者预后的关系.结果:在食管鳞癌组织中hMLH1 mRNA表达显著低于正常...     

Nuclear BAG-1 expression is a biomarker of poor prognosis in esophageal squamous cell carcinoma

Apoptosis is one of the critical biological factors that correlate with the biological behavior of malignant tumors including cancer progression and clinical outcome. The present study was performed to clarify the clinical implications of BAG-1, a bcl-2 binding protein in esophageal squamous cell carcinoma (ESCC). Seventy-one cases with ESCC were investigated. Immunohistochemical study of BAG-1 was performed on resected specimens. The expression pattern of BAG-1 in nuclei and/or cytoplasm was analyzed and correlated with TNM classification, vessel invasion, survival period after surgery. BAG-1 expression in the nuclei was related to the depth of tumor invasion (P = 0.0381) but not to any other clinicopathologic parameters. The cytoplasmic staining pattern of BAG-1 exhibited no correlation with clinicopathologic parameters. Univariate analysis (P < 0.05), but not multivariate analysis, revealed significantly poor prognosis for ESCC cases exhibiting positive nucleic staining for BAG-1. Our data suggests that BAG-1 expression in the nuclei of ESCC plays an important role in tumor development and may be useful for predicting the prognosis after surgery.     

Relationship between expression of Smac and Survivin and apoptosis of primary hepatocellular carcinoma

Introduction Disturbance of the regulation of cell apoptosis can lead to cell over-proliferation, and decrease of apoptosis can result in tumorigenesis ortumor development. The apoptotic signaling pathway is regulated by a variety of factors and is based on the balance between cell death and survival factors.[1, 2] The central players in apoptosis are caspases, and one important route to activation of the caspases involves the translocation of cytochrome C (Cyt-C) from mitochondria to cytosol…