新疆哈萨克族食管癌中HPV感染状况分析

目的:探讨人乳头状病毒(HPV)18, 31, 45E7 3个高危基因亚型在新疆哈萨克族(哈族)食管癌中的感染率及其相关性. 方法:采用聚合酶链反应(PCR)技术检测HPV-18, 31, 45E7基因在316例哈族食管癌中的感染情况. 并随机抽取PCR产物进行测序来验证PCR结果.结果:HPV18, 31和45E7基因亚型在食管癌中阳性率分别为25.3%(80/316), 14.2%(45/316)和7.3%(23/316), 其基因型分布与年龄、性别均无关. HPV31, 45E7基因阳性率在组织病理学分级上无统计学意义. HPV18基因型分布在中低分化食管鳞状细胞癌中的检出率明显高于高分化食管鳞癌(29.6% vs 17.7%, χ2 = 5.398, P<0.05).结论:HPV18型是新疆哈族食管癌的主要高危亚型之一, 其基因型分布与食管癌分化程度有关;HPV31, 45亚型可能不是新疆哈族食管癌最主要的高危亚型.     

Rb/E2F1调控途径在新疆哈萨克族食管鳞癌发生中的作用

目的:探讨Rb基因与转录因子E2F1在新疆哈萨克族食管鳞癌中的表达及临床意义.方法:应用RT-PCR法对48例新疆哈萨克族食管鳞癌组织及其配对的癌旁正常组织进行Rb和E2F1表达检测,分析Rb/E2F1通路与新疆哈萨克族食管鳞癌发生发展之间的关系.结果:新疆哈萨克族食管鳞癌组织中Rb的阳性表达高于癌旁正常组织(64.6%,43.8%)差异有统计学意义(P<0.05);转录因子E2F1的阳性表达率与癌旁正常组织阳性表达率(70.8%,75%)差异无统计学意义(P>0.05).Rb、E2F1的表达与组织学分级及临床分期无关(P>0.05).Rb阳性表达强度与E2F1的阳性表达强度之间呈正相关(r=0.867,P<0.05).结论:Rb的高表达伴随新疆哈萨克族食管鳞癌的发生,E2F1可能作用于食管癌发生的早期阶段,二者在新疆哈萨克族食管鳞癌的发生发展中起拮抗作用.     

哈萨克族食管癌与CYP2E1基因多态性及烟酒嗜好的关系

目的:探讨细胞色素P4502E1(CYP2E1)基因多态性,烟酒嗜好与哈萨克族食管癌易感性的关系.方法:采用1:2配比的病例对照研究方法,调查哈萨克族食管癌患者120例和非食管癌患者240例,采用聚合酶链-限制性片段长度多态(PCR-RFLP)方法检测CYP2E1 RsaⅠ位点的基因型.结果:病例组中CYP2E1 RsaⅠ位点C1/C1、C1/C2、C2/C2基因型频率与对照组比较(78.3%vs53.3%,19.2%vs 37.5%,2.5%vs 9.2%,X~2=21.794,P<0.01)差异有统计学意义:携带C1/C1基因型发生食管癌的危险性是携带C1/C2或C2/C2基因型的3.07倍(95%CI:1.87.5.03);交互作用提示CYP2E1基因多态与吸烟、饮酒均存在交互作用;其危险性远高于各单独作用之和.结论:CYP2E1 RsaⅠ位点基因多态性与大量吸烟、饮酒之间的基因-环境交互作用可增强哈萨克族人群患食管癌的风险.     

肝素酶基因表达与食管癌转移的关系

目的　探讨肝素酶基因表达与食管癌转移的关系。方法　采用逆转录聚合酶链反应技术 ( RT-PCR)检测 5 4例食管癌组织、癌旁组织及正常粘膜中肝素酶基因的表达。结果　有淋巴结转移的食管癌癌组织中肝素酶基因阳性表达率为 90 .5 % ( 19/ 2 1) ,癌旁组织为 6 1.9% ( 13/ 2 1) ,正常粘膜为 0 ( 0 / 2 1)。无淋巴结转移的食管癌癌组织中肝素酶基因阳性表达率为 15 .2 % ( 5 / 33) ,癌旁组织为 6 % ( 2 / 33) ,正常粘膜为 0 ( 0 / 33)。有淋巴结转移的食管癌组织及癌旁组织中肝素酶基因阳性表达率均高于无淋巴结转移者 ,二者相比差异均有显著性 (癌组织 P<0 .0 0 1,癌旁组织 P<0 .0 5 )。结论　肝素酶基因表达可能与食管癌发生转移有关 ,其可能成为预测食管癌转移的指标     

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。     

宫颈癌组织中HPV16型E6/E7序列突变分析

目的：分析泉州地区宫颈癌患者HPV16型E6/E7序列突变情况,探讨其与宫颈癌发生的相关性。方法：取35例HPV16阳性的宫颈癌组织标本,采用PCR法扩增E6、E7全长基因。PCR产物直接测序,并与野生型序列进行比对。分析E6、E7基因的变异情况。结果：E6、E7基因的突变率分别为91.4%和89.2%。E6基因中有10个位点为错义突变, 2个位点为无义突变。氨基酸突变频率最高的是D25E（77.1%）。E7基因中共发现5个突变位点,有2个位点为错义突变,3个位点为无义突变,突变频率最高是N29S和无义突变T846C（均为75.0%）。结论：HPV16 E6、E7基因中最常见突变位点D25E、N29S和T846C可能与宫颈癌的发生密切相关,可为研究针对中国人群的HPV疫苗提供一定的线索。     

HspB1在新疆哈萨克族食管癌组织中的表达

目的:寻找与新疆哈萨克族食管癌发生、发展密切相关的基因,为早期诊断和治疗提供依据.方法:利用二维凝胶电泳(2-DE)和基质辅助激光解吸电离飞行时间质谱(MALDI-TOF-MS)技术联用检测出新疆哈萨克族食管癌癌组织与远端正常组织的差异表达蛋白.对其中的HspB1基因进行RT-PCR验证.结果:2-DE结果显示新疆哈萨克族食管癌患者癌组织和远端正常组织在蛋白质水平有显著增高,而其mRNA表达在癌组织中为2.18±3.98,正常组织为3.06±4.69,并无显著升高(P>0.05),且与浸润深度、临床分期、分化程度无关(P>0.05),但HspB1的表达量在浸润深度组,T1-T2期T>N为7/11(63.6%),而T3-T4期T>N仅为14/37(37.8%);在分化程度组,低分化期T>N为5/9(55.6%),中高分化期T>N仅为16/39(41%).随着浸润深度和分化程度的逐步加深,由T>N向T相似文献   

人子宫颈癌组织PD-L1表达及其与HPV16E6/E7的相关性

目的探讨PD-L1在宫颈癌发生、发展中的作用。方法采用免疫组化SABC法及RT-PCR法分别检测40份宫颈癌组织(宫颈癌组)、25份宫颈上皮内瘤变(CIN)Ⅱ、Ⅲ级组织(CIN组)、8份正常宫颈组织(正常组)中程序性死亡配体1(PD-L1)、HPV16E6/E7(人乳头瘤病毒16型E6/E7)表达并分析二者的相关性。结果宫颈癌组、CIN组均有PD-L1、HPV16E6/E7表达,宫颈癌组表达明显高于CIN组(P<0.01);PD-L1与HPV16E6/E7表达呈正相关,r=0.531,P<0.01。正常组未见二者表达。结论 PD-L1在人子宫颈癌中发生、发展中起促进作用。     

冠心病病变范围与载脂蛋白E基因多态性及血脂分布的关系

目的 :探讨冠心病 (CHD)病变范围与载脂蛋白E(apoE)基因多态性及血脂分布的关系。 方法 :用酚氯仿抽提核酸法从凝血块中分离DNA ,用多聚酶链式反应 限制性片段长度多态性 (PCR RFLP)方法对新疆乌鲁木齐地区维、汉两民族人群中 10 2例CHD患者和 5 1例对照组人群进行apoE基因多态性 (由ε2、ε3和ε4决定的E2 / 2、E3/ 3、E4 / 4、E4 / 2、E4 / 3和E3/ 2 )HhaI酶切研究。结果 :①CHD组apoE之ε2 ,ε3和ε4等位基因频率分别为 0 .0 735± 0 .2 15 7,0 .774 5± 0 .3117和 0 .15 2 0± 0 .2 4 16 ,1支病变组apoE之ε2 ,ε3和ε4等位基因频率分别为 0 .10 6 1± 0 .2 4 2 3,0 .75 76± 0 .35 6 2和 0 .136 4± 0 .2 2 6 1,2支病变组apoE之ε2 ,ε3和ε4等位基因频率分别为 0 .0 5 5 6± 0 .1992 ,0 .80 5 6± 0 .2 995和 0 .1389± 0 .2 5 6 7,3支病变组apoE之ε2 ,ε3和ε4等位基因频率分别为 0 .0 6 0 6± 0 .2 0 76 ,0 .75 76± 0 .2 82 9和 0 .1818± 0 .2 4 4 3,与正常对照组 (0 .196 1± 0 .30 13,0 .6 6 6 7±0 .36 97和 0 .1373± 0 .2 2 5 4 )比较 ,ε2明显减低 (P <0 .0 5 ) ,病变范围越大 ,ε2越低 ,但病变范围大小之间统计学无差异 ,ε3和ε4随着病变范围增大逐渐升高但统计学无显著差别 (P >0     

植酸酮对宫颈癌细胞株中 HPV16／18 E6／E7 mRNA 及蛋白表达的影响

目的观察植酸酮对宫颈癌细胞株中HPV16/18 E6/E7 mRNA及蛋白表达的影响。方法体外培养Caski细胞株(含HPV16)与Hela细胞株(含HPV18),将所有细胞分成实验1、2、3、4组和对照组,每组均包含Caski细胞和Hela细胞。实验1、2、3、4组分别加入含58.6、117、586、5 860 mg/L植酸酮的培养液,对照组加入不含植酸酮的培养液。各组培养72 h后,采用real-time PCR法分别检测HPV16/18 E6/E7 mRNA,采用Western blotting法检测E6/E7蛋白。结果实验1、2、3、4组同一型别细胞中E6/E7 mRNA及蛋白相对表达量低于对照组,且实验1、2、3、4组E6/E7 mRNA及蛋白相对表达量依次降低(P均<0.05)。各实验组内,Caski细胞中E6/E7 mRNA相对表达量低于Hela细胞(P均<0.05)。各实验组内同一型别细胞中,E6 mRNA相对表达量低于E7 mRNA(P均<0.05)。结论植酸酮可下调人宫颈癌细胞株中HPV16/18 E6/E7 mRNA及蛋白表达,且作用呈剂量依赖性;植酸酮对HPV16 E6/E7 mRNA的抑制作用强于HPV18 E6/E7 mRNA,并可能以抑制E6 mRNA表达为主导。     

宫颈细胞 HPV E6／E7 mRNA 检测在宫颈病变诊断中的价值

目的：评价高危型人乳头状瘤病毒（ HPV） E6/E7 mRNA检测对宫颈病变的诊断价值。方法520例患者采用b-DNA技术检测HPV E6/E7 mRNA,并用宫颈液基细胞学（ TCT）行宫颈细胞学检查,对其中任何一项阳性者做阴道镜下宫颈活组织检查,以组织病理为金标准,计算HPV E6/E7 mRNA阳性对高级别宫颈上皮内瘤样病变（ CIN）、宫颈浸润癌诊断的灵敏度、特异度、阳性预测值、阴性预测值,并与TCT检查进行比较。结果520例患者中HPV E6/E7 mRNA阳性158例, TCT异常222例。 TCT 异常者中HPV E6/E7 mRNA阳性率较TCT 正常者中HPV E6/E7 mRNA阳性率高（P＜0．05）。146例慢性宫颈炎、CINⅠ级患者与124例高级别CIN、宫颈浸润癌患者中HPV E6/E7 mRNA阳性率比较,P＜0．05。 HPV E6/E7 mRNA阳性对高级别CIN及宫颈浸润癌诊断的灵敏度、特异度、阳性预测值、阴性预测值分别为74．19％、83．33％、58．23％、71．43％,TCT 检查分别为81．53％、69．44％、81．45％、92．28％,两者特异度及阳性预测值比较, P均＜0．05。结论在宫颈癌筛查中检测高危型HPV E6/E7 mRNA对预测高级别CIN,尤其对评估癌症风险有重要的临床价值。     

人乳头瘤病毒16型早基因E6/E7编码区序列变异研究

目的获取人乳头瘤病毒16型早基因E6/E7的编码区序列并进行变异分析,为新型分子诊断方法的研发提供目标序列。方法通过导流杂交基因芯片技术获取人乳头瘤病毒16型感染宫颈脱落细胞。设计特异性引物,扩增人乳头瘤病毒16型早基因E6/E7的编码区序列,克隆后测序并对序列进行变异分析。结果通过导流杂交基因芯片技术进行宫颈脱落细胞的分型检测,获得了人乳头瘤病毒16型感染阳性标本;选择其中3份阳性标本核酸为模板,通过特异性引物均成功扩增出大小介于750 bp和1 000 bp之间的目的序列;分别克隆到T载体上并测序,得到3条人乳头瘤病毒16型早表达基因E6/E7的编码区序列,克隆并测序后向GenBank核酸数据库提交获收录,登录号分别为EU869316、EU869317和EU869318;经BLAST分析,3条序列与GenBank序列PPH16（Accession：K02718）的E6/E7编码区序列一致性均为99%,且存在8种碱基置换,其中4种为同义突变,另4种则可引起所编码的相应氨基酸残基改变。结论本研究得到了与HPV高危型16型PPH16高度相似的E6/E7编码序列,为HPV致病机制和新型分子检测方法研究奠定了基础。     

Human papillomavirus in squamous cell carcinoma of esophagus in a high-risk population

AIM: To investigate the relation of human papillomavirus (HPV) and esophageal squamous cell carcinoma (ESCC) in Iranian patients as compared to normal controls. METHODS: Using MY09/MY11 consensus primers, we compared the prevalence of a HPV L1 gene in tumor tissues from 38 ESCC cases and biopsied tissues from 38 endoscopically normal Iranian individuals. We also compared the presence of HPV16 and HPVA18 in the same samples using type-specific E6/E7 primers. RESULTS: Fourteen (36.8%) of the 38 ESCC samples but only 5 (13.2%) of the 38 control samples were positive for the HPV L1 gene (P= 0.02). Five (13.2%) of the ESCC samples but none of the control samples were positive for the HPV16 E6/E7 gene (P= 0.05). Three (7.9%) of the ESCC samples and 5 (13.2%) of the control samples were positive for the HPV18 E6/E7 gene (P= 0.71). CONCLUSION: Our data are consistent with HPV DNA studies conducted in other high-risk areas for ESCC. HPV should be considered as a potential factor contributing to the high incidence of ESCC in Iran and other high-incidence areas of the world.     

Identification of High-Risk Human Papillomavirus DNA,p16, and E6/E7 Oncoproteins in Laryngeal and Hypopharyngeal Squamous Cell Carcinomas

Human papillomavirus (HPV) was proven to play a significant role in cancer development in the oropharynx. However, its role in the development of laryngeal (LSCC) and hypopharyngeal squamous cell carcinoma (HPSCC) remains to be clarified. High-risk HPV (HR-HPV) viral proteins E6 and E7 are considered to be pertinent to HPV-related carcinogenesis. Hence, our aim was to estimate LSCC and HPSCC for HR-HPV DNA, p16, and E6/E7 oncoprotein status by using molecular virology and immunohistochemistry methods. The prevalence of HPV16 infection was 22/41 (53.7%) and 20/31 (64.5%) for LSCC and HPSCC, accordingly. The majority of HPV16+ tumor samples were stage III or IV. In most samples, the presence of either HPV16 E6 or HPV16 E7 viral protein in dysplastic or tumor cells was confirmed using immunohistochemistry. Our results suggest a high prevalence of HPV16 as a primary HR-HPV type in LSCC and HPSCC. The lack of HPV E6/E7 oncoproteins in some tumor samples may suggest either the absence of viral integration or the presence of other mechanisms of tumorigenesis. The utilization of p16 IHC as a surrogate marker of HR-HPV infection is impractical in LSCC and HPSCC.     

人乳头状瘤病毒在食管癌中的表达及其作用

背景：人乳头状瘤病毒（HPV）感染与宫颈癌和口腔鳞状细胞癌的发生密切相关，但其与食管癌的关系及其所致相关基因表达的变化尚不十分清楚。目的：研究HPV在食管癌中的表达，探讨其对相关基因蛋白表达的影响。方法：以DNA原位杂交法检测HPV16基因的表达，以免疫组化方法检测HPV16E。突变型p53、p21WAF1、pRb和p16INK4a蛋白的表达。结果：食管癌组织中HPV16DNA的阳性率显著高于正常对照组（65．6％对10．0％，P〈0．001），HPV16E。蛋白的表达率亦显著高于正常对照组（58．9％对15．0％，P〈0．001）；突变型p53蛋白的表达率显著高于正常对照组（53．3％对45．0％，P〈0．05），p21WAF1、pRb和P16INK4a蛋白的表达率则显著低于正常对照组（22．2％对65．0％、23-3％对55．0％和35．6％对85．0％，P〈0．001）。食管癌组织中HPV16E。蛋白与突变型p53蛋白的表达呈正相关，与p21WAF1、pRb和p16INK4a蛋白的表达呈负相关（P〈0．01）。结论：HPV感染是食管癌发生的重要危险因素之一，其可能通过p53突变和p21WAF1、pRb、p16INK4a失活参与了食管癌的发生。     

Evidence of human papilloma virus infection and its epidemiology in esophageal squamous cell carcinoma

AIM: To look for the evidence of human papilloma virus (HPV) infection in esophageal squamous cell carcinomas (ESCC) and to investigate the potential role and epidemiology of HPV infection in the pathogenesis of esophageal carcinomas in Henan emigrants. METHODS: Papilloma virus (PV) and HPV were determined by UltrasensiveTM S-P immunohistochemistry (IHC) and in situ hybridization (ISH) in esophageal carcinoma tissues (82 cases) and the normal mucosa (40 cases). RESULTS: IHC revealed that the positive rate of PV was 75.0%, 68.18% and 72.5% respectively while the HPV (16/18-E6) positive rate was 45.0%, 36.36%, 37.5%, respectively in esophageal carcinoma tissue specimens from Henan emigrants,the local citizens and patients in Hubei Cancer Hospital. The PV and HPV (16/18-E6) were negative in all normal esophageal mucosa specimens. No correlation was found between HPV in esophageal squamous cell carcinoma tissues and in grade 1-3 esophageal squamous cell carcinoma cells. In situ hybridization showed that the HPV (16/18) DNA positive rate was 30.0%, 31.8%, 25.0%, respectively in the 3 groups of samples. No positive hybridization signal was found in 40 normal esophageal mucosa specimens. The positive rate of HPV (16/18) DNA in the esophageal carcinoma specimens was significantly higher than that in normal mucosa specimens (P<0.05). The positive rate was not different among the 3 groups of esophageal carcinoma tissue specimens(P>0.05). CONCLUSION: HPV infection is high in esophageal carcinoma of Henan emigrants, local residents and patients in Hubei Cancer Hospital. HPV is closely related with esophageal squamous cell carcinoma. HPV infection may play an important role in esophageal squamous cell carcinoma.     

Study of immortalization and malignant transformation of human embryonic esophageal epithelial cells induced by HPV18 E6E7

In order to study the effect of viruses and tumor promoters on the tumorigenicity of the esophagus, human embryonic esophageal epithelial cells were infected with human papilloma virus HPV18 E6E7-AAV in synergy with 12-O-tetradecanoylphorbol 13-acetate (TPA) to observe their malignant transformation. The cultured esophageal epithelial cells incubated with HPV18 E6E7-AAV were divided into two groups: the SHEEC1 group was exposed to TPA (5 ng/ml) for 4 weeks at the 5th passage of the cells; the SHEE group served as the control and was cultured in the same medium without TPA. The morphological phenotype, the DNA content during the cell cycle and the chromosomes were analyzed. The tumorigenicity was assessed by colony formation after cultivation in soft agar and transplanting the cells into nude mice. HPV18 E6E7 DNA was assayed by fluorescent in situ hybridization (FISH) and the polymerase chain reaction (PCR). The SHEE group, at its 20th passage, grew as a monolayer with the cells showing anchorage dependence and contact inhibition. The chromosome analysis showed diploidy, and soft-agar cultivation and injection into nude mice showed the cells to be non-tumorigenic. They were therefore immortalized cells. In contrast, the SHEEC1 group (TPA group) showed increased DNA synthesis and a proliferative index that was higher (45%) than that of the SHEE group (34%). The number of large colonies of dense multilayer cells (positively transformed foci) in soft agar was high in SHEEC1 group (4.0%) but low in the SHEE group (0.1%). Tumors resulting from transplantation were observed in all six nude mice injected subcutaneously with cells of the SHEEC1 group but no tumor developed in mice receiving cells of the SHEE group. In both groups of cells, HPV18 E6E7 DNA was positively detected by FISH and PCR. The malignant transformation of human embryonic epithelial cells was induced in vitro by HPV18 E6E7 in synergy with TPA. This is a good evidence for the close relationship between HPV and the etiology and pathogenicity of esophageal carcinoma. It is also a reliable model for studying the cellular and molecular mechanisms of carcinogenesis of esophageal carcinoma. Received: 1 October 1999 / Accepted: 2 February 2000