幽门螺杆菌L型和HPV16、18感染在人食管癌中同步检测的对比分析

目的研究幽门螺杆菌L型(Hp-L型)和HPV16、18感染与人食管癌的关系,探讨Hp-L型致癌机制。方法应用革兰染色和免疫组化染色技术,对112例食管鳞癌和30例对照组进行Hp-L型和HPV16、18同步检测。结果革兰染色L型检出率(67.9％)与对照组(26.7％)有显著性差异(P＜0.05);与免疫组化Hp-L型抗原检出阳性率(65.2％)无显著性差异(P＞0.05)。Hp-L型检出阳性事为61.6％(69／112)。HPV16、18表达阳性率为69.6％,与Hp-L型检出阳性率无显著性差异(P＞0.05);Hp-L型和HPV16、18同时阳性者占59.8％(67／112)结论Hp-L型和HPV16、18感染与食管癌发生相关。Hp-L型感染可能是食管癌除病毒之外的又一生物性致癌因素。     

HPV16地方分离株E6基因的克隆与原核表达研究

目的克隆人乳头瘤病毒（HPV16E6）基因并在大肠埃希菌中表达，对表达产物进行鉴定。方法用PCR方法从克隆质粒pUC19-HPV16E6E7中扩增HPV16E6基因，采用定向克隆构建pQE30-HPV16E6原核表达质粒．利用酶切和序列测定鉴定重组质粒。将pQE30-HPV16E6转化大肠埃希菌BL21（DE3），建立重组工程菌pQE30-HPV16E6／BL21（DE3）。经异丙基-β-D-硫代半乳糖苷（IPTG）诱导，SDS—PAGE分析蛋白表达情况，利用Western blot鉴定抗原特异性。结果PCR产物470bp，重组质粒经酶切和序列测定证实构建正确。SDS—PAGE分析在18×10^3处有蛋白条带出现，与预期一致。Western blot分析证实目的条带与HPV16E6抗体有特异性反应。结论成功构建了HPV16E6基因的基因工程菌株，能高效表达E6蛋白，表达蛋白具有良好的免疫反应性。     

PCR检测结直肠肿瘤组织HPV16型DNA的研究

ＰＣＲ检测结直肠肿瘤组织ＨＰＶ１６型ＤＮＡ的研究周宇１于皆平２沈志祥２罗和生２Ｓｕｂｊｅｃｔｈｅａｄｉｎｇｓｃｏｌｏｎｉｃｎｅｏｐｌａｓｍｓ／ｖｉｒｏｌｏｇｙ；ｒｅｃｔａｌｎｅｏｐｌａｓｍｓ／ｖｉｒｏｌｏｇｙ；ｐａｐｉｌｏｍａｖｉｒｕｓ，ｈｕｍａ...     

幽门螺杆菌L型和HPV16,18感染在人食管癌中同步检测 …

目的 研究幽门螺杆菌Ｌ型（Ｈｐ－Ｌ型）和ＨＰＶ１６、１８感染与人食管癌手关系,探讨Ｈｐ－Ｌ型致癌机制。方法 应用革兰染色和免疫组化染色技术,对１１２例食管鳞癌和３０例对照组进行Ｈｐ－Ｌ型和ＨＰＶ１６、１８同步检测。结果 革兰染色Ｌ型检出率（６７．９％）与对照组（２６．７％）有显著性差异（Ｐ〈０．０５）;与免疫组化Ｈｐ－Ｌ型抗原检出阳性率（６５．２％）无显著性差异（Ｐ〉０．０５）。Ｈｐ－Ｌ型检出阳性     

食管癌组织HPV16E6蛋白表达变化及其对CyclinD蛋白表达的影响

目的观察食管癌组织中HPVl6E6蛋白表达变化,探讨其对食管癌组织细胞周期蛋白（CyclinDl）表达的影响。方法用免疫组化sP法检测40例食管鳞癌患者肿瘤组织（鳞癌组）、癌旁正常食管组织（对照组）及10例食管不典型增生患者病变组织（增生组）中的HPVl6E6蛋白表达;采用WesternNot法检测HPVl6E6阳性及阴性食管鳞癌患者肿瘤组织中的CyclinDl蛋白表达。结果鳞癌组、增生组、对照组HPVl6E6蛋白阳性表达率分别为55％（22／40）、20％（2／10）、12．5％（5／40）,鳞癌组HPVl6E6蛋白阳性表达率高于增生组和对照组（P均〈0．05）。HPVl6E6蛋白阳性、阴性者癌组织中CyclinDl蛋白表达量分别为0．892±0．057、0．327±0．02;HPVl6E6蛋白表达阳性者肿瘤组织CyclinDl蛋白表达量高于HPVl6E6蛋白阴性者（P〈0．05）。结论食管癌组织中HPVl6E6蛋白表达升高,并与CyclinDl蛋白表达有关。     

食管鳞癌中HPV-16E6与p53的表达相关性

食管鳞癌中ＨＰＶ１６Ｅ６与ｐ５３的表达相关性邹赛英１唐新萍１刘旭明１司静懿２１兰州军区乌鲁木齐总医院病理科新疆乌鲁木齐８３００００２中国协和医科大学基础医学研究所生物物理研究室Ｓｕｂｊｅｃｔｈｅａｄｉｎｇｓｅｓｏｐｈａｇｅａｌｎｅｏｐｌａｓｍｓ...     

HPV16 E6/E7基因及蛋白表达与宫颈癌的相关性研究

目的研究人乳头状瘤病毒16型（HPV16）E6／E7基因及其蛋白表达在宫颈疾病及其癌变中的作用。方法运用PCR技术检测51例宫颈癌（癌症组）、20例富颈上皮瘤变（CIN）Ⅱ～Ⅲ级（CIN组）、20例宫颈炎（炎症组）患者病变组织中HPV16 E6／E7基因,并运用免疫组化SP法检测癌症组癌组织中HPV16E6、E7的表达情况。结果癌症组、CIN组、炎症组HPV16 E6检出率分别为5％、35％、45％．后两者明显高于前者（P〈0．05）,HPV16 E7检出率分别为65％、75％、68．6％,P均〉0．05;癌症组45例HPV16 E6和42例E7蛋白阳性表达（88．2％、82．3％）。HPV16 E6蛋白表达与临床分期、肿瘤分化程度和淋巴结有无转移均无相关性（P〉0．05）,HPV16 E7蛋白表达与临床分期和淋巴结有无转移相关（P〈0．05）,与肿瘤分化程度无相关性（P〉0．05）。结论HPV16 E6／E7基因与宫颈疾病及其癌变的关系密切。     

胃癌组织p16及p18基因变异

p16基因又名多肿瘤抑制基因(MTS1),1994年首先由Kamb et al克隆成功。此基因包含3个外显子及2个内含子,位于人9号染色体短臂2区1带(9p21),编码P16蛋白,在人类多种肿瘤中存在纯合性缺失及突变等变异,但胃癌中的改变情况国内外报道较少。p18基因是一个新近发现的与p15,p16基因同属一个基因家庭的抑癌基因,在结构和功能上与p15,p16基因具有高度同源性,但在多种人类癌肿中其变异少见,它在胃癌中的改变情况目前国内外尚未见报道。本研究通过PCR及银染PCR-SSCP技术检测胃癌组织p16基因外显子E1a,E1β,E2及p18基因外显子E1的纯合性缺失及突变情况。 1 材料和方法 1.1材料 43例胃癌患者的新鲜癌手术标本、相应的癌旁正常组织置-70℃冰箱中保存备用。本组病例中男27例,女16     

HPV16型感染与胃癌关系的研究

本研究应用ＰＣＲ和Ｓｏｕｔｈｅｒｎｂｌｏｔ技术,检测胃癌、癌旁组织和癌前病变组织中人乳头瘤病毒１６型（ＨＰＶ１６）ＤＮＡ序列,以期了解ＨＰＶｓ与中国胃癌的关系．１材料和方法１．１材料实验标本来源于广东医学院附属医院,均为石蜡包埋标本．每例标本均作常规...     

Cloning of differentially expressed genes in human hepatocellular carcinoma and nontumor liver

INTRODUCTIONThe mechanism of hepatocellular carcinoma(HCC)is still unclear,although some genes have been found to play a role in the transformation of liver cells,and a variety of studies have described differences in gene expression which distinguished tumor from nontumor[1-6].The new genes,especially the functional genes directly related with tumor are still worth being found.The purpose of our study is to find the different genes between human liver tumor and normal tissues using suppression subtractive hybridization.     

结直肠癌组织中人乳头瘤病毒DNA的研究

目的研究１６、１８型人乳头瘤病毒（ＨＰＶ）是否与结直肠癌的发生有关．方法结直肠粘膜活检组织１２３例，其中结直肠癌３５例，乳头状腺瘤１７例，炎性息肉１１例，结肠炎３０例，以及正常结肠粘膜３０例，用对各型ＨＰＶ高度保守的通用引物和１６、１８型特异性引物作聚合酶链反应（ＰＣＲ）检测ＨＰＶＤＮＡ．结果ＨＰＶＤＮＡ总检出率１４６％，正常粘膜，结肠炎和炎性息肉组为３３％（２／７１），乳头状腺瘤为１７６％（３／１７），结直肠腺癌为３７１％（１３／３５）．在正常粘膜，结肠炎和炎性息肉组未发现１６、１８型ＨＰＶＤＮＡ，在乳头状腺瘤组有３例为１８型ＨＰＶＤＮＡ阳性，结直肠腺癌组１３例ＨＰＶ阳性病例中有３例为１６型，９例为１８型感染；在正常组织、癌旁组织和癌组织中ＨＰＶＤＮＡ检出率依次增高．ＨＰＶ在直肠、左半结肠，右半结肠感染率依次为２８６％，１４％，２６％．结论结肠癌的发生与ＨＰＶ１６、１８型有关，腺癌以１８型感染为主．ＨＰＶＤＮＡ检出率在右半结肠，左半结肠和直肠依次增高．     

Differentially expressed genes in hepatocellular carcinoma induced by woodchuck hepatitis B virus in mice

INTRODUCTIONHepatocellular carcinoma(HCC)is one of the major causes of death in the word.The mechanism of carcinogenesis is unknown,although it is widely accepted that HBV and HCV are clsely related to liver cancer[1-5[1-5].Previously,a variety of studies have described the differences in gene expression which distinguished tumor from nontumor[6-11].Cloning of the genes,especially the genes associated with HBV and HCV,is still very important to account for the development of liver cancer.     

Human papillomavirus 16 E6 is associated with the nuclear matrix of esophageal carcinoma cells

AIM:To explore the etiologic role of HPV infection inesophageal carcinoma,and the association of HPV-16 E6with the nuclear matrix of carcinoma cells.METHODS:Two esophageal carcinoma cell lines,EC/CUHK1 and EC/CUHK2,were tested for HPV-16 E6subgenetic fragment by polymerase chain reactionarnplification of virus DNA associated nuclear matrix.RT-PCR and immunocytochemistry were also used to visualizethe expression of E6 subgene in the cells.RESULTS:The HPV-16 E6 subgenetic fragment was found tobe present in nuclear matrix-associated DNA,E6oncowprotein localized in the nucleus where it is tightlyassociated with nuclear matrix after sequential extraction inEC/CUHK2 cells.It was not detected,however,in EC/CUHK1 cells.CONCLUSION:The interaction between HPV-16 E6 andnuclear matrix may contribute to the virus inducedcarcinogenesis in esophageal carcinoma.     

High prevalence of human papillomavirus in esophageal squamous cell carcinoma: a study in paired samples

Esophageal squamous cell carcinoma (ESCC) is one of the common cancers with a poor prognosis. Incidences of human papillomavirus (HPV) infection range from 0 to 67% in different parts of the world. It has been frequently associated with high‐risk HPV genotypes 16 and 18. The present study analyzes the prevalence of HPV infection in ESCC tumor and adjoining mucosa. Fresh tissue samples were obtained from ESCC tumor (group I) and adjoining mucosa (group II). Aliquots of DNA extracts were used. There were 23 patients with paired samples, 19 (83%) were male. HPV was positive in 20/23 (87%). Mean age of HPV positive in group I was 56.63 ± 6.96 and in group II 54.31 ± 7.13 years (P > 0.05). Majority had more than one viral type. HPV52 was the most common observed in 14 (61%) males and two (9%) females. Other common viruses were HPV55, 39, and 59. Smoking had a significant association with viral positivity. p63 and p16 oncoproteins correlated with degree of tumor differentiation but not with viral status. We documented high prevalence of high‐risk HPV in ESCC. Our observations support the concept of persistent infection by an oncogenic HPV in cancer development. Our study highlights importance of documenting viral genotype in a defined geographic area.     

Experimental and clinicopathologic study on the relationship between transcription factor Egr-1 and esophageal carcinoma

AIM: To observe the growth suppression effect of exogenous introduction of early growth response gene-1 (Egr-1 gene) on esophageal carcinoma tissue as well as on esophageal carcinoma cell line Eca109 and to explore the potential application of Egr-1 gene in gene therapy of tumor. METHODS: Eukaryotic expression vector of PCMV-Egr-1 plasmid was introduced into Eca109 cell line which expressed no Egr-1 protein originally with lipofectamine transfection method. The introduction and expression of PCMV-Egr-1 plasmid into Eca109 cell line was confirmed by G418 selection culture, PCR amplification of neogene contained in the vector, Western blot analysis and immunocytochemical analysis. The cell growth curve, soft agar colony formation rate and tumorigenicity in SCID mice were examined to demonstrate the growth suppression effect of exogenous Egr-1 gene on Eca109 cell line. The Egr-1 mRNA and Egr-1 protein were also detected in 50 surgical specimens of esophageal carcinoma by in situ hybridization and immunohistochemistry. RESULTS: Exogenous Egr-1 gene was introduced successfully into Eca109 cell line and expressed Egr-1 protein stably. The transfected Eca109 cell line grew more slowly than control Eca109 as shown by cell growth curves, the soft agar colony formation rate (4.0% vs 6.9%, P < 0.01) and the average growth rate of tumor in SCID mice (35.5 +/- 7.6 vs 65.8 +/- 7.6, P < 0.05). The expression level of Egr-1 mRNA and protein significantly increased in dysplastic epithelia adjacent to cancer rather than in cancer tissues (65.8% vs 20.0% by ISH and 57.9% vs 0.01). CONCLUSION: Exogenous Egr-1 gene shows the strong effect of growth inhibition in Eca109 cell line. Egr-1 in the cancer tissue shows down-regulated expression that supports the inhibited function of Egr-1 in cancer growth and suggests Egr-1 may have an important role in gene therapy of esophageal carcinoma.     

胃癌p53基因表达与转移及预后的研究

目的观察胃癌组织ｐ５３基因的超表达及其与预后的关系。方法用抗人Ｐ５３基因蛋白单克隆抗体Ｓ＿Ｐ免疫组织化学方法，观察１２８例胃癌组织ｐ５３表达状况，并对ｐ５３表达与胃癌淋巴结转移状态和术后５年生存率进行比较分析。结果胃癌组织１２８例的ｐ５３表达阳性率为４３８％（５６／１２８）；ｐ５３表达阳性和阴性组的胃癌局部和远处淋巴结转移率分别为６７９％（３８／５６）和５１４％（３７／７２），两者经统计学处理无显著性差异（Ｐ＞００５）。获得随访９８例，胃癌术后５年生存率的随访结果显示，ｐ５３阳性和阴性组分别为３８１％（１６／４２）和３０１％（１７／５６），两组间无统计学意义（Ｐ＞００５）。结论胃癌的发生与ｐ５３基因突变关系密切，并可用免疫组化检测，但Ｐ５３基因蛋白在胃癌组织中的超表达，似不能作为判断胃癌预后的参考指标，应进一步探讨     

Human papillomavirus 16 E6 is associated with the nuclear matrix of esophagesl carcinoma cells

AIM: To explore the etiologic role of HPV infection in esophageal carcinoma, and the association of HPV-16 E6with the nuclear metrix of carcinoma cells. METHODS: Two esophageal carcinoma cell lines, EC/CUHK1 and EC/CUHK2, were tested for HPV-16 E6subgenetic fragment by polymerase chain reaction amplification of virus DNA associated nuclear matrix. RT-PCR and immunocytochemistry were also used to visualizethe expression of E6 subgene in the cells. RESULTS: The HPV-16 E6 subgenetic fragment wes found to be present in nuclear metrix-associeted DNA, E6oncoprotein localized in the nucleus where it is tightly associated with nuclear matrix after sequential extraction in EC/CUHK2 cells. It was not detected, however, in EC/CUHK1 cells. CONCLUSION: The interaction between HPV-16 E6 and nuclear matrix may contribute to the virus induced carcinogenesis in esophageal carcinoma.