Effect of HCV NS3 protein on P53 protein expression in hepatocarcinogenesis

ＮＴＲＯＤＵＣＴＩＯＮＨｅｐａｔｏｃｅｌｕｌａｒｃａｒｃｉｎｏｍａ（ＨＣＣ）ｉｓｏｎｅｏｆｔｈｅｍｏｓｔｃｏｍｍｏｎｈｕｍａｎｃａｎｃｅｒｓｉｎｔｈｅｗｏｒｌｄ．Ｒｅｃｅｎｔｌｙ,ｔｈｅＨＣＶｉｎｆｅｃｔｉｏｎｗａｓｆｏｕｎｄｔｏｂｅａｎｅｔｉｏｌｏ...     

血浆循环核酸P53基因突变与肝癌的相关性研究

目的:检测肝癌患者血浆中P53基因突变的机率,研究与疾病发生、发展的相关性并探讨其意义。方法:实验采用聚合酶联链式反应(PCR)扩增P53基因外显子5~8,对其突变进行分析。结合临床患者有无肝组织以外转移来对比差异性。结果:33例肝癌患者中,有17例结果显示血浆循环核酸P53基因突变;有转移病灶组18例的突变率高于无转移病灶组15例。结论:血浆P53基因突变与肝癌的发生可能有相关性,与疾病的轻重、病灶转移有某种内在联系,突变机率在临床鉴别诊断和治疗预后中有参考价值。     

耐多药相关蛋白在人非小细胞肺癌组织中的表达

目的　检测人非小细胞肺癌组织中耐多药相关蛋白（ＭＲＰ） 的表达,探讨其与瘤组织学类型、分化程度、临床分期及预后的关系。方法　采用免疫组化方法及逆转录聚合酶链反应（ＲＴＰＣＲ）技术,分别检测了９２ 份人非小细胞肺癌石蜡组织中ＭＲＰ的表达及１６ 份人非小细胞肺癌新鲜组织中ＭＲＰ基因的表达。结果　９２ 份人非小细胞肺癌组织中（ 鳞癌４３ 例,腺癌４９ 例）ＭＲＰ表达阳性检出率为５４％（５０／９２） ,１６ 份人非小细胞肺癌组织中ＭＲＰ基因表达阳性检出率为３１％ （５／１６）。ＭＲＰ在腺癌中的表达阳性率明显高于鳞癌（ Ｐ＜ ０－０５） ,ＭＲＰ表达与瘤分化程度、肿瘤大小及淋巴结转移无显著相关。ＭＲＰ阳性患者术后５ 年生存率为１６％ （８／５０）,ＭＲＰ 阴性患者术后５ 年生存率为５２％ （２２／４２） ,二者经统计学处理,差异有显著性（ Ｐ＜ ０－０５）。ＭＲＰ阳性患者术后５ 年生存率有随其瘤组织中该蛋白表达阳性程度的增加而降低之趋势。结论　非小细胞肺癌患者瘤组织中ＭＲＰ的表达与瘤组织学类型及预后明显相关。     

老年肺癌组织学类型、分化及其P53蛋白表达

目的 研究老年肺癌组织学特点及其Ｐ５３蛋白的表达。方法 肺癌组织学类型按ＷＨＯ标准进行分类,Ｐ５３蛋白的表达采用免疫组化技术。结果 老年组肺癌的组织学类型与非老年组不同,差异有显著性（Ｐ〈０．０５）;Ｐ５３蛋白总阳性率为４２．８６％,两者间差异没有显著性（Ｐ〉０．０５）。结论 老年肺癌的组织学类型有其自己的特点,Ｐ５３基因在肺癌的发生发展中具有重要意义。     

肺鳞癌组织Mdm2蛋白表达p53基因突变相关性研究

目的探讨原发性肺鳞癌与Ｍｄｍ２蛋白表达、ｐ５３基因突变之间的相关性。方法采用ＳＰ免疫组织化学方法和银染聚合酶链式反应单链构象多态性（银染ＰＣＲＳＳＣＰ）方法检测手术切除、经病理证实的４５例原发性肺鳞癌组织及癌旁肺组织中Ｍｄｍ２蛋白表达和ｐ５３基因突变情况。结果免疫组织化学检测的４５例肺鳞癌组织Ｍｄｍ２蛋白阳性率为６２％（２８／４５）,２例癌旁肺组织中Ｍｄｍ２蛋白呈弱阳性表达,免疫组织化学方法结合银染ＰＣＲＳＳＣＰ检测４５例肺癌组织ｐ５３基因突变,阳性率为５１％（２３／４５）,４５例癌旁肺组织未检测到ｐ５３基因突变。（１）肺鳞癌与ｐ５３基因突变有明显相关性（Ｐ＜０．０５）。（２）肺鳞癌与Ｍｄｍ２基因产物过度表达有明显相关性（Ｐ＜０．０５）。（３）Ｍｄｍ２蛋白过度表达与ｐ５３基因突变复合存在和肺鳞癌淋巴转移（６６％,１０／１５）有明显相关性（Ｐ＜０．０５）。结论Ｍｄｍ２蛋白过度表达与ｐ５３基因突变是临床估计患者预后重要的分子生物学指标     

p53 C-myc和P-gp蛋白在胃癌细胞中表达

目的研究胃癌组织中ｐ５３和Ｃｍｙｃ的表达与多药耐药性（ＭＤＲ）的关系．方法应用ＬＳＡＢ免疫组织化学方法研究６７例（男４１例，女２６例，平均年龄４６±１５８岁）胃癌标本中ｐ５３，Ｃｍｙｃ和Ｐｇｐ的表达．结果本组胃癌中ｐ５３阳性３２例（４７８％），Ｃｍｙｃ阳性３７例（５５２％），Ｐｇｐ阳性３９例（５８２％）．淋巴结转移阳性胃癌ｐ５３阳性率（５６９％）和Ｃｍｙｃ阳性率（６４７％）显著高于淋巴结转移阴性的胃癌（Ｐ＜００５）．ｐ５３的异常表达与ｍｄｒ１基因表达呈显著正相关（ｒ＝０６３，Ｐ＜００５），而Ｃｍｙｃ和ｍｄｒ１的表达无明显相关．结论ｐ５３异常表达可增加ｍｄｒ１基因的表达，从而使胃癌细胞获得ＭＤＲ表型     

原发性胃癌p53基因突变

目的 p53基因是当前抑癌基因研究中的热点之一。迄今,有关 p53基因异常与胃癌临床病理学参数如大体类型、临床分期、组织分化程度,浸润深度及淋巴结转移之间的关系尚无定论。Tumura 报告p53基因改变主要发生于异倍体瘤,国内尚无报道。本实验目的主要是分析中国人原发性胃癌 p53基因突变与这些病理参数,包括 DNA 倍体之间的关系。方法用聚合酶链式反应—单构象多态分析(PCR—SSCP)技术对20例原发性胃癌 p53基因外显子5—8突变进行检测。结果 8例(40%)发生了突变,其中2例发生在外显子7,4例发生在外显子8。0至Ⅲ期均有突变存在。66.7%(6/9)的异倍体瘤检测到了p53突变,而二倍体瘤中只有18.2%(2/11)发生了 p53突变。结论 p53基因突变与胃癌临床病理参数如大体类型、分期、组织分化程度、浸润深度及淋巴结转移之间无明显关系,而与胃癌 DNA 倍体改变有关。     

Clinical significance of immunohistochemica study of P53 protein in colorectal carcinoma

AIMS To determine the clinical significance of P53 protein ex-pression in colorectal carcinoma.METHODS The expression of P53 protein in 92 colorectal car-cinomas was examined using the monoclonal antibody PAb 1801.Correlation between P53 protein expression and prognosis in col-orectal carcinoma was analyzed using log-rank test.RESULTS The frequency of P53 protein expression was 57.61%,corresponding with Dukes' staging.Analysis of survivordata demonstrated that the survival rate of colorectal carcinomawith positive P53 protein group was lower than that of negativeP53 protein group.CONCLUSIONS We conclude that the expression of P53 pro-tein is correlated with poor prognosis in colorectal carcinoma.     

p53蛋白在口腔鳞癌中的表达

目的 通过对突变型p53蛋白在口腔鳞癌组织中表达的观察,分析p53与口腔鳞癌临床病理特征之间的关系,探讨p53在口腔鳞癌发生中的作用机制。方法 利用免疫组化(P-V法)检测116例患者口腔鳞癌组织及10例正常人口腔黏膜组织中突变型p53蛋白的表达情况。结果 p53蛋白在正常人口腔黏膜和口腔鳞癌组织中的表达率分别为20％、63.8％,二者比较差异有统计学意义(X2=5.660 4,P<0.05);口腔鳞癌在不同病理分级时,p53蛋白表达差异有统计学意义(X2=7.536 2,P<0.05);p53蛋白表达与年龄、性别、发生部位及有无淋巴结转移无相关性。结论 突变型p53蛋白表达与口腔鳞癌的发生有关。不同病理分级,p53蛋白表达也不同。     

Clinical relevance of p53 index and expression of proliferating cell nuclear antigen and Ki-67 in gastric cancer

The prognostic value of the immunohistochemical expression of p53 protein, proliferating-cell nuclear antigen (PCNA) and Ki-67 antigen was evaluated in a series of 116 stage I–II gastric cancer patients. The staining for p53 protein (staining frequency and intensity) in malignant cells was expressed as a p53 index. Similarly, the staining frequency and intensity for PCNA and Ki-67 were evaluated. The p53 index was independent of the stage and differentiation grade, but significantly related to DNA ploidy, S-phase fraction and mitotic activity. A high p53 index was a sign of inferior survival, compared to a low or intermediate index. p53-negative tumours were also associated with poor survival. In a multivariate analysis, only the depth of tumour infiltration and the presence of nodal metastases were independent prognostic factors in stage I–II gastric cancer. PCNA expression and Ki-67 antigen expression were not related to the stage, ploidy, proliferative activity or p53 expression, and they had no impact on survival. The results indicate that p53 protein expression may be of prognostic significance in gastric cancer, while PCNA and Ki-67 antigen expression have no predictive value. Received: 2 February 1998 / Accepted: 16 June 1998     

P53 accumulation and proliferating-cell nuclear antigen expression in human lung cancer

Mutations in thep53 gene are currently the commonest genetic alterations in human malignant tumors, including non-small-cell lung cancer (NSCLC) and small-cell lung cancer (SCLC). Alterations of the protein induced by gene mutations enables the mutant protein to become more stable, resulting in the accumulation of P53 in quantities detectable by immunohistochemistry. Although previous studies document the accumulation of P53 in lung cancer, there is little information regarding the usual frequency of accumulation based on a comprehensive number of lung tumors. A total of 328 paraffin-embedded lung carcinoma specimens were analyzed for P53 accumulation and for the expression of the proliferating-cell nuclear antigen (PCNA) by standard immunohistochemistry. Among 49 SCLC, 35% were positive for p53 and 51% were positive for PCNA. Out of 279 NSCLC, 43% showed a positive P53 immunoreaction and 72% displayed detectable amounts of PCNA. In squamous-cell carcinomas a statistically significant increased accumulation of P53 was found compared to adenocarcinomas (P=0.001). Among the 233 PCNA-positive tumors the relative number of P53-positive specimens was higher compared to the total number of tumors. Since immunohistochemical investigations should contribute to the improvement of the clinical diagnosis and treatment or give information on the prognosis, we conclude from our results that it seems to be legitimate to assess the P53 status exclusively in the specimens positive for PCNA. Immunohistochemical investigations under consideration of the PCNA status yielded good and fast recognition ofp53 mutations leading to intracellular P53 protein accumulation.Abbreviations SCLC small-cell carcinoma - NSCLC non-small-cell carcinoma - PCNA proliferating-cell nuclear antigen     

胃癌组织P16，P53蛋白和增殖细胞核抗原的表达意义

目的探讨Ｐ１６,Ｐ５３蛋白和增殖细胞核抗原（ｐｒｏｌｉｆｅｒａｔｉｎｇｃｅｌｎｕｃｌｅａｒａｎｔｉｇｅｎ,ＰＣＮＡ）在胃癌的发生、发展中的作用及临床意义．方法应用免疫组织化学方法,对７７例胃癌和癌旁粘膜组织、２１例胃正常组织中Ｐ１６,Ｐ５３蛋白表达产物和ＰＣＮＡ进行检测,并结合临床资料进行分析．结果胃癌组织中Ｐ１６蛋白的阳性率为２０８％（１６／７７）,明显低于癌旁粘膜组织５９７％（４６／７７）和胃正常组织９０５％（１９／２１,Ｐ＜００５）;Ｐ５３蛋白与ＰＣＮＡ在胃癌组织中的阳性率为８０５％（６２／７７）和９２２％（７１／７７）,明显高于癌旁粘膜组织４１６％（３２／７７）,６４９％（５０／７７）和胃正常组织００％（０／２１,Ｐ＜００５）．Ｐ１６,Ｐ５３蛋白和ＰＣＮＡ阳性表达与胃癌组织学类型、浸润深度、分化程度及淋巴结转移有显著性差异（Ｐ＜００５）,与患者年龄、性别、肿瘤大小及部位无关（Ｐ＞００１）．结论Ｐ１６,Ｐ５３蛋白和ＰＣＮＡ的异常表达对胃癌的发生发展、恶性程度、淋巴结转移及预后有密切关系和重要临床意义．     

Lack of correlation between p53 codon 72 polymorphism and anal cancer risk

AIM： To investigate the potential role of p53 codon. 72 polymorphism as a risk factor for development of anal cancer. METHODS： Thirty-two patients with invasive anal carcinoma and 103 healthy blood donors were included in the study, p53 codon 72 polymorphism was analyzed in blood samples through polymerase chain reaction-restriction fragment length polymorphism and DNA sequencing. RESULTS： The relative frequency of each allele was 0.60 for Arg and 0.40 for Pro in patients with anal cancer, and 0.61 for Arg and 0.39 for Pro in normal controls. No significant differences in distribution of the codon 72 genotypes between patients and controls were found. CONCLUSION： These results do not support a role for thep53 codon 72 polymorphism in anal carcinogenesis.     

胃癌组织P53蛋白和PCNA的表达意义

目的研究胃癌组织Ｐ５３蛋白和增殖细胞核抗原（ＰＣＮＡ）的表达意义．方法应用ＡＢＣ免疫组织化学技术检测７６例保存资料完整并经病理学证实的胃癌石蜡包埋组织和３０例正常胃粘膜Ｐ５３蛋白及ＰＣＮＡ的表达进行同步检测．结果正常胃粘膜无Ｐ５３蛋白表达，而６４４％（４９／７６）胃癌组织中Ｐ５３蛋白表达阳性，Ｐ５３蛋白表达阳性者其细胞增殖活性为８２１％±１７６％，明显高于Ｐ５３蛋白表达阴性组的６４２％±１４３％（Ｐ＜００１）．Ｐ５３蛋白阳性率和ＰＣＮＡ计数值与胃癌临床分期及复发呈正相关（Ｐ＜００１）．结论联合检测Ｐ５３蛋白和ＰＣＮＡ对胃癌诊断、分期及预后有重要价值．     

Expression of P53 oncoprotein in benign and malignant lesions of large bowel

AIM: To investigate the expression of P53 oncoprotein in benign and malignant lesions of the large bowel as well as the relationship between p53 expression and clinicopathological factors. METHODS: Immunohistochemistry was used to detect P53 protein in large bowel tissues of 146 cases with benign and malignant lesions. RESULTS: All normal large bowel mucosae and non-neoplastic polyps were negative for P53 protein. However, the positive rates of P53 protein in adenomas, paracancerous mucosae and carcinomas were 18.18% (2/11), 13.21% (7/53) and 42.11% (32/76), respectively. The P53 expression in both adenomas and paracancerous mucosae presented only weak staining, whereas 75% of p53 positive cancers displayed very intense staining (++ or +++). The rates of P53 protein detection in poorly differentiated carcinoma and mucous carcinoma were 63.64% (7/11) and 62.5% (10/16), respectively, which were much higher than that of well/moderately differentiated carcinomas (30.16%, 15/40) (p < 0.05), and the carcinomas with marked positive p53 expression were more likely to penetrate the bowel wall and metastasize to lymph nodes (p < 0.05). However, no relationship between p53 expression and massive type, tumor size, location, Dukes stage or 3-year survival was found in this study. CONCLUSION: P53 gene mutation and overexpression are common in colorectal cancers, and seem to be associated with histological type, progression and lymph node metastasis of colorectal cancer.     

结直肠癌线粒体脱氧核糖核酸拷贝数与患者预后的关系

目的 探讨结直肠癌(CRC)线粒体DNA(mtDNA)拷贝数异常与患者预后的关系.方法 选取60份CRC及相应癌旁组织标本,分别提取基因组DNA.对线粒体ND1基因进行荧光定量PCR,计算mtDNA拷贝数,采用t检验进行统计分析.Kaplan-Meier生存分析判断患者的预后.结果 CRC组织的mtDNA平均拷贝数/细胞数为108.60±20.11,而相应的癌旁组织为153.68±25.72,前者显著低于后者(t=10.69,P＜0.01).淋巴结转移阳性者mtDNA低拷贝率高于阴性者(x2=4.022,P＜0.05),但与性别、年龄、病理分型、TNM分期无明显相关性.mtDNA高拷贝组生存率高于低拷贝组,但差异无统计学意义(P＞0.05).结论 CRC的mtDNA拷贝数明显低于癌旁组织,但拷贝数的改变与患者的预后无关.     

大肠癌P53蛋白PCNA和CEA的表达与淋巴结转移的关系

目的研究大肠癌Ｐ５３蛋白、增殖细胞核抗原（ＰＣＮＡ）和ＣＥＡ的表达与淋巴结转移的关系．方法应用链霉菌素生物素（ＳＰ）免疫组化法，观察４４例大肠癌Ｐ５３，ＰＣＮＡ的阳性率和ＣＥＡ的表达型式．结果大肠癌Ｐ５３阳性率为５２３％；大肠癌Ｐ５３阳性表达与性别、年龄及肿瘤的部位、分化程度和浸润深度无关（Ｐ＞００５）；大肠癌Ｐ５３阳性者其淋巴结转移率较阴性者高（１４／２３，６０９％ｖｓ６／２１，２８６％，Ｐ＜００５）；Ｐ５３阳性表达及有淋巴结转移者其细胞增殖活性分别较Ｐ５３阴性表达及无淋巴结转移者高（５５９±１７ｖｓ３７９±１４，Ｐ＜００５；５６２±１５ｖｓ３９６±１７，Ｐ＜００５）；Ｐ５３阳性表达及有淋巴结转移者其ＣＥＡ表型均以胞质型和间质型为主（２１／２３，９１３％ｖｓ１３／２１，６１９％，Ｐ＜００５；１９／２０，９５０％ｖｓ１５／２４，６２５％，Ｐ＜００５）．结论检测Ｐ５３和ＰＣＮＡ表达及ＣＥＡ表型对判断大肠癌的恶性程度，预测其淋巴结转移趋势和预后及指导临床治疗有重要价值．     

河南食管癌高发区老年与青年食管癌患者P53蛋白和Rb蛋白表达变化

目的　探讨食管癌高发区林州市 (原林县 )老年食管癌患者的分子学变化特征及其意义。　方法　采用免疫组化卵白素 生物素 过氧化物酶复合物 (ABC)法和组织病理学方法 ,分析食管鳞癌组织中P5 3和Rb蛋白的表达状况与病变程度和年龄差异之间的关系。　结果　老年食管癌患者食管癌组织P5 3变化阳性率 (2 7/ 33,82 % )明显高于同一地区青年患者 (10 / 4 3,2 3% ) (P <0 0 0 1)。老年患者Rb变化阳性率亦高于老年组 ,但差异无统计学意义。此外 ,老年患者P5 3和Rb在食管癌组织中的表达具有较高的一致性 (P <0 0 1)。　结论　本研究结果为进一步探讨食管癌高发区河南林州市老年患者食管癌分子发病机制提供了资料。     

胃癌细胞株蛙皮素受体的检测

目的 观察胃癌细胞株ＳＧＣ ７９０１细胞蛙皮素受体ｍＲＮＡ和受体蛋白的表达。方法 （１）利用逆转录聚合酶链反应（ＲＴ－ＰＣＲ）和Ｓｏｕｔｈｅｒｎ ｂｌｏｔ观察胃癌细胞株ＳＧＣ ７９０１细胞蛙皮素受体ｍＲＮＡ的表达；（２）利用交联剂（ＤＳＳ）化学交联增强化学发光（ＥＣＬ）自显影观察胃癌细胞株ＳＧＣ７９０１细胞株受体蛋白的表达。结果 （１）ＲＴ－ＰＣＲ产物经Ｓｏｕｔｈｅｒｎ杂交与预期的蛙皮素受体ｃＤＮ     

肝细胞癌P53，Bcl-2蛋白的表达和细胞凋亡

目的探讨肝细胞癌（ＨＣＣ）中细胞凋亡情况及其与Ｐ５３和Ｂｃｌ２蛋白表达的关系．方法细胞凋亡采用原位细胞凋亡检测法Ｐ５３和Ｂｃｌ２蛋白表达采用免疫组化方法．细胞凋亡与Ｐ５３，Ｂｃｌ２蛋白表达的关系采用双标记法进行检测．结果ＨＣＣ７０例，癌组织和癌周组织中细胞凋亡指数（１０００个细胞中）分别为３６±２０和１０６±３６．Ｂｃｌ２和突变型Ｐ５３蛋白检出率分别为２２９％和４２９％．Ｂｃｌ２主要表达在癌周组织中，抑制肝细胞凋亡；而Ｐ５３则仅表达在癌组织，抑制癌细胞凋亡．双染色显示细胞凋亡与Ｐ５３或Ｂｃｌ２不同时在一个细胞中表达．结论ＨＣＣ癌细胞凋亡减弱．突变型Ｐ５３蛋白是癌细胞凋亡减弱的主要原因，而Ｂｃｌ２则可能在维持ＨＣＣ的肝脏功能方面具有重要作用．