胆囊腺癌p21、p53表达及细菌L型检测的意义

应用免疫组化（ＳＰ法）和革兰氏染色技术，对３６例胆囊胆癌和３０例慢性胆囊炎进行ｐ２１、ｐ５３蛋白及细菌Ｌ型检测，同时对Ｌ型阳性和阴性组织的ｐ２１、ｐ５３表达进行对比分析。结果发现，腺癌和慢性炎的革兰染色Ｌ型检出率分别为８０．６％和７６．７％，与Ｌ型抗原检出率均地 差异。腺癌组的Ｐ２１、Ｐ５３表达率明显高于炎症组，腺癌中Ｌ型阳性组的Ｐ２１、Ｐ５３表达率也高于其Ｌ型阴性组，表明Ｌ型感染与胆囊腺癌、慢性     

P53抑癌基因突变产物在胆囊腺癌中的表达

Ｐ５３基因位于１７号染色体短臂上，Ｐ５３基因野生型具有肿瘤抑制作用，而具有肿瘤转化作用的是Ｐ５３基因的突变体。野生型Ｐ５３蛋白不稳定，含量低，用抗Ｐ５３蛋白单克隆抗体检测，有Ｐ５３蛋白的过量表达显示Ｐ５３基因的空变，本实验检测３４例胆囊腺癌，结果表明不同分化的腺癌都有不同程度的Ｐ５３基因突变，说明Ｐ５３基因蛋白在肿瘤早期诊断和作为预后观察是一项辅助指标。     

P53蛋白和VEGF在老年人胃腺癌组织中表达意义的研究

目的探讨老年人胃腺癌组织中P53蛋白和VEGF表达的意义.方法应用免疫组化S-P法对40例胃癌和20例正常胃组织进行P53蛋白、血管内皮生长因子(VEGF)和微血管密度(MVD)检测,研究老年人胃腺癌组织P53蛋白和VEGF的表达与肿瘤组织中MVD和淋巴结转移的关系.结果①正常胃组织中P53蛋白和VEGF表达全部阴性,胃癌组织中P53蛋白、VEGF阳性率分别为52.5%、62.5%.②P53蛋白、VEGF的阳性表达强度与MVD及淋巴结转移呈显著正相关(P＜0.05);与细胞组织学分级呈显著负相关(P＜0.05).③P53蛋白表达强度与VEGF表达强度亦呈显著正相关(P＜0.05).结论突变的P53蛋白可以通过增加VEGF的产生引起瘤内MVD增多,促进肿瘤的生长和转移,P53蛋白、VEGF的表达强度可以作为判定胃癌转移潜能及评估预后的有效指标.     

胃腺癌组织微管解聚蛋白1和突变型P53的表达及意义

目的应用免疫组化方法检测胃腺癌中微管解聚蛋白(Stathmin)1和突变型P53(TP53)的表达,分析二者的关系及意义。方法确诊为胃腺癌的患者共72例为A组,经病理学确诊为胃黏膜高级别上皮内瘤变的术后组织32例为B组,经病理学确诊为胃黏膜低级别上皮内瘤变的内镜咬检组织32例为C组,距肿瘤边缘>5 cm的非肿瘤性胃黏膜组织15例为D组,均留取蜡块组织,应用免疫组化SP法检测4组Stathmin1和TP53的表达。结果 4组Stathmin1和TP53表达的阳性率差异均有统计学意义(P<0.01)。A组Stathmin1和TP53的表达与肿瘤最大径、增殖指数密切相关;Stathmin1的表达与肿瘤脉管侵犯密切相关,二者均与肿瘤的淋巴结转移和神经侵犯无相关性。相关分析显示A组Stathmin1和TP53呈正相关。结论胃腺癌中Stathmin1和TP53高表达对肿瘤形成和进展有重要作用。Stathmin1和TP53有明显的正向协同作用。     

胃癌及癌前病变中p53蛋白的检测及意义

探讨p53蛋白表达与胃癌及癌病变的相互关系,方法：用免疫组化染色示检测33例肠化,26例异型增生和26例胃癌组织中p53蛋白的表达。结果：p53蛋白在胃癌组织中表达率最高（61．5％）,在异型增生和肠化组织中的表达率分别为34．6％和12．1％,组间有显著差异,各期胃癌组织中p53蛋白的表达无显著差异,结论：p53蛋白在胃癌前病变中已有阳性表达,在肠化、异型增生及胃癌组织中,其表达率依次增高,p53蛋白积累主要发生在癌前病变晚期及胃癌早期,其表达与胃癌发生密切相关。     

p53蛋白在人肝细胞癌及其肝内转移灶和癌栓中的表达及意义

应用ＬＳＡＢ法测定了５２例人肝细胞癌（ＨＣＣ）及其肝内转移灶和癌栓中Ｐ５３的表达水平，并对Ｐ５３表达与ＨＣＣ浸润转移和预后关系进行了前瞻性研究。结果表明，在原发癌灶、肝内转移灶和癌栓中Ｐ５３表达无显著性差异；在分化较差和包膜浸润的ＨＣＣ Ｐ５３高表达；转移组原发癌癌栓较单发癌癌栓Ｐ５３高表达；Ｐ５３高表达的ＨＣＣ术后复发率较高，预后较差。提示Ｐ５３基因及其蛋白产物在ＨＣＣ浸润播散过程中起重要调控作     

胃腺癌组织P53,P63和P73蛋白表达的意义

目的:探讨P53,P63和P73蛋白表达与胃腺癌临床病理特征之间的关系．方法:用免疫组织化学技术,检测72例胃腺癌及其癌旁正常组织中P53,P63和P73蛋白表达情况．所有研究对象均为湖北地区汉族人．其中,癌肿位于胃远端(胃窦、胃角)51例,胃近端(胃底、胃体)21例;肠型GAC 44例、弥漫型28例;高分化腺癌20例、中分化腺癌29例、低分化和未分化腺癌23例;TNM分期:Ⅰ和Ⅱ期13例,Ⅲ和Ⅳ期59例．结果:胃腺癌组织中P53,P63和P73蛋白阳性表达率均明显高于正常组织(X2=4．72,P<0．05; X2=5．51,P<0．05;X2=9．75,P<0．01);胃窦／胃角腺癌与胃底／胃体腺癌组织P53蛋白表达率无显著差异(P>0．05);在弥漫型胃腺癌中的表达率明显高于肠型胃腺癌(X2=4．68,P<0．05);在低分化腺癌与高中分化腺癌之间以及Ⅲ,Ⅳ期腺癌与Ⅰ,Ⅱ期胃腺癌之间的表达率的差异均有显著性(X2=7．06,P<0．05;X2=3．95, P<0．05)．P63蛋白在低分化腺癌组织中表达率明显高于高中分化腺癌(X2=7．36,P<0．05);在胃窦／胃角腺癌与胃底／胃体腺癌之间、在弥漫型与肠型胃腺癌之间、在Ⅰ,Ⅱ期胃腺癌与Ⅲ,Ⅳ期腺癌之间均无显著差异．P73蛋白在Ⅰ,Ⅱ期胃腺癌组织中的阳性表达率明显低于Ⅲ,Ⅳ期腺癌(X2=4．14,P<0．05),在胃窦／胃角腺癌与胃底／胃体腺癌之间、在弥漫型与肠型胃腺癌之间、在高、中及低分化胃腺癌之间均无显著差异．在P53蛋白阳性与阴性表达的胃腺癌之间,P63和P73蛋白阳性表达率的差异无显著性．结论:P53,P63和P73过度表达与胃腺癌的发生相关联,但并无交互作用．     

错配修复蛋白和p53蛋白在结直肠癌中的表达及其临床意义

背景:研究表明,结直肠癌的主要发病途径有两条,即染色体不稳定性途径和微卫星不稳定性(MSI)途径。目的:探讨错配修复蛋白(MMRP)和p53蛋白在结直肠癌中的表达及其临床意义。方法:采用免疫组化SP法检测2013年1月—2017年12月上海市嘉定区中心医院收治的276例结直肠癌中4种MMRP和p53蛋白表达,并分析其与临床病理特征的关系。分析MSI对结直肠癌患者生存情况的影响。结果:MMRP表达缺失36例(13.0%),MSI与组织病理学类型、TNM分期和血吸虫感染有关(P<0.05),而与患者性别、年龄、发病部位、分化程度和淋巴结转移均无关(P>0.05)。p53蛋白在结直肠癌中的阳性表达率为44.9%,其表达与组织病理学类型、TNM分期、淋巴结转移和血吸虫感染有关(P<0.05),而与患者性别、年龄、发病部位和分化程度均无关(P>0.05)。MSI与p53表达呈负相关(r=-0.169,P<0.05)。MSI组和MSS组的1、3、5年生存率分别为100%、97.2%、83.1%和96.7%、81.9%、38.9%,差异有统计学意义(χ^2=12.582,P=0.001)。结论:MSI和p53表达与结直肠癌的临床病理特征关系密切,对肿瘤的恶性程度和预后的判断有指导意义。MSI与p53表达呈负相关,提示两者可能参与结直肠癌不同阶段的发生、发展过程。     

p53和Bcl-2蛋白在舌鳞癌组织中的表达及意义

目的 研究p53和Bcl-2蛋白在舌鳞癌和癌前病变中的表达及意义。方法 采用免疫组化SP法检测38例舌鳞癌（A组）、20例13腔癌前病变（B组）及10例正常口腔舌上皮组织（C组）中p53和Bcl-2蛋白的表达情况。结果比较A、B、C三组,p53和Bcl-2蛋白的表达在A组与C组、B组与C组之间,P均〈0．05,在A组与B组之间,P〉0．05;ps3蛋白异常表达在淋巴结转移组显著高于无转移组,P〈0．05;Bcl-2蛋白高表达与p53蛋白高表达之间无相关性,P〉0．05。结论p53和Bcl-2蛋白高表达与舌鳞癌的发生、发展密切相关。     

P53突变蛋白在胃癌及癌旁组织中的表达

应用ＡＢＣ免疫组化方法及核仁形成区银染色，对３８例手术切除的胃癌及癌旁胃粘膜组织冰冻切标本进行了Ｐ５３突变蛋白表达的检测及ＡｇＮＯＲ颗粒计数，结果：３８例胃癌标本中２４例Ｐ５３突变蛋白高表达，阳率为６３、２％；３８例癌旁胃粘膜中１０例Ｐ５３突变蛋白弱表达。伴有淋结转移的２３例胃癌标本，１８例Ｐ５３蛋白高表达。Ｐ５３表达阳性的胃癌组织，每核ＡｇＮＯＲ颗粒平均数较Ｐ５３表达阴性者明显增多，差异有显著性     

Expression of p53 in adenocarcinoma of the gallbladder and bile ducts

Abstract: Point mutation of the p53 tumor suppressor gene appears to be an important event in tumor development and progression, and overexpression of the p53 gene product has been widely studied in a variety of neoplasms. Some point mutations of the p53 gene lead to an increase in half-life in the gene product, which accumulates in the nucleus and can be detected by immunohistochemical means. We studied overexpression of p53 protein in specimens from 12 patients with adenocarcinoma of the gallbladder, two gallbladders with epithelial dysplasia without carcinoma, eight carcinomas of the common bile duct, 13 hilar cholangiocarcinomas, and six peripheral cholangiocarcinomas. The monoclonal antibody Ab-2 (Oncogene Science) was used in conjunction with citrate microwave antigen retrieval. Nuclear staining was scored as positive (graded 1 to 3, depending on number of positive nuclei) or negative. Overexpression of p53 protein was present in 7/12 (58%) gallbladder carcinomas, and was seen more often in moderately or poorly differentiated tumors. Intramucosal carcinoma adjacent to invasive carcinoma was positive in three cases, although fewer cells stained than in the carcinoma. Two cases of low-grade dysplasia not associated with carcinoma were negative. Expression of p53 was not an independent prognostic factor when survival was related to grade and stage of tumor. Three of eight (38%) common bile duct carcinomas and 5/13 (38%) hilar cholangiocarcinomas were positive for p53. Slightly fewer (2/6, 33%) peripheral cholangiocarcinomas were positive. No difference in survival relative to p53 expression was demonstrated.     

HSP60和p53在胃癌中的表达及意义

[目的]研究热休克蛋白60(HSP60)和p53在胃癌组织中的表达,并分析与胃癌临床病理特征的关系。[方法]采用免疫组化SABC法检测48例胃癌组织和14例正常胃黏膜中HSP60和p53的蛋白表达。[结果]胃癌组织中HSP 60和p53蛋白表达阳性率分别为81.3%、68.9%;HSP60在胃癌中表达与肿瘤分化程度及增殖能力有关(P0.05);p53蛋白在胃癌中表达与肿瘤大小、部位、浸润深度、淋巴结转移和肿瘤增殖能力有关(P0.05);HSP60与p53的表达无相关性。而HSP60在正常胃黏膜中有弱阳性表达(7.1%),在正常胃黏膜中未见p53表达。[结论]HSP60和p53表达与胃癌生物学行为有关,在胃癌的发生、发展过程中发挥着重要的作用。     

热休克蛋白27和p53在胃癌中的表达及意义

[目的]研究热休克蛋白27(HSP27)和p53在胃癌组织中的表达及与胃癌生物学行为关系。[方法]采用免疫组化SABC法检测48例胃癌(胃癌组)、20例正常胃黏膜(对照组)组织中HSP27和p53的蛋白表达。[结果]HSP 27、p53蛋白表达阳性率,胃癌组分别为64.6%、68.9%,对照组分别为7.1%、0%,2组比较差异有统计学意义(P0.01);HSP27在胃癌中表达与肿瘤浸润深度、淋巴结转移及临床分期有关(P0.05),p53蛋白在胃癌中表达与肿瘤大小、部位、浸润深度、淋巴结转移和肿瘤增殖能力有关(P0.05),HSP27与p53的表达无相关性。[结论]HSP27和p53表达与胃癌生物学行为有关,在胃癌的发生、发展过程中发挥着重要的作用。     

Expression and significance of VEGF and p53 in degenerate intervertebral disc tissue

ObjectiveTo investigate the mechanism of expression and significance of vascular endothelial growth factor (VEGF) and p53 in degenerate intervertebral disc tissue.MethodsPathological sections collected from 156 patients with lumbar disc herniation after surgery were tested by immunohistochemistry method, for evaluation of the expression of VEGF and p53 in degenerate intervertebral disc tissue.Results98 cases (62.8%) with vascular infiltration phenomenon are found, and positive rates of VEGF and p53 in degenerate intervertebral disc tissue are 73.42% (116/156) and 58.97% (92/156); co-expression rate is 53.2%(83/156); the expression rates of VEFG and p53 are significantly higher in the tissue with blood vessel infiltration than in the tissue without infiltration; there is a close relationship of VEGF with p53.ConclusionsVEGF and p53 gene synergetic express in degenerate intervertebral disc tissue, working together in neovascularization and infiltration, and accelerating intervertebral disc tissue degeneration.     

p53、c-Myc在血吸虫感染的原发性肝癌患者肝癌组织中的表达及意义

目的 对有血吸虫感染的肝癌患者肝癌组织p53、c-Myc蛋白的表达及其与肝癌生物学行为进行研究,探讨血吸虫感染与肝细胞癌的关系.方法 58例原发性肝细胞癌患者分为两组:原发性肝细胞癌伴有血吸虫病组(HCS组)23例和原发性肝细胞癌不伴有血吸虫病组(HC组)35例.采用免疫组织化学sP法检测所有患者的p53、c-Myc蛋白表达;同时对p53、c-Mye与肝细胞癌的多种临床病理参数的相关性进行分析.结果 p53蛋白阳性表达率在两组中分别为73.9%(17/23)和31.4%(11/35).存在显著性差异(P<0.01);而c-Myc蛋白阳性率在HCS组和HC组中无显著性差异(P>0.05).p53及c-Myc在肝癌组织中的检出率与肝外转移、术后复发及肿瘤分化程度明显相关(P<0.05或0.01).结论 血吸虫感染对肝癌组织中p53突变蛋白的过量表达有一定的促进作用.p53及c-Myc在肝癌组织中的检出率与代表肿瘤不良生物学特征的指标肝外转移、术后复发及肿瘤分化程度明显相关.联合检测p53、c-Myc在肝细胞癌中的表达,可作为估价肝细胞癌生物学行为的参考指标.     

血吸虫病患者肝癌细胞p53和c-myc蛋白的表达

目的对血吸虫病患者肝癌细胞p53和c-myc蛋白的表达进行研究,探讨血吸虫感染与肝细胞癌的关系。方法将58例原发性肝细胞癌患者分为两组：原发性肝细胞癌伴有血吸虫病组（HCS组）23例和原发性肝细胞癌不伴有血吸虫病组（HC组）35例。采用免疫组织化学S-P法检测所有患者的p53蛋白和c-myc蛋白的表达,同时对p53、c-myc与肝细胞癌的多种临床病理参数的相关性进行分析。结果p53蛋白阳性表达率在HCS组和HC组中分别为73.9%和31.4%,两组间比较有显著性差异（P〈0.01）;p53及c-myc在肝癌组织中的检出率与淋巴结转移、术后复发及肿瘤分化程度明显相关（P〈0.05或0.01）。结论血吸虫感染对肝癌细胞中p53突变蛋白的过量表达有一定促进作用;p53及c-myc在肝癌组织中的检出率与代表肿瘤不良生物学特征的指标淋巴结转移、术后复发及肿瘤分化程度明显相关。     

Expression of mutant p53 protein in hepatocellular carcinoma.

p53 mutations are a common genetic finding in hepatocellular carcinoma from areas of high aflatoxin exposure. Recent small studies have shown that p53 gene mutations may be less common in areas with a low prevalence of hepatocellular carcinoma such as Great Britain. The protein product of mutant p53 can be detected immunohistochemically because of its longer half life in comparison with native protein. This study used a novel monoclonal antibody DO-7, raised against recombinant p53 and effective in routinely processed biopsy specimen tissue, to detect the mutant protein in a series of 45 cases of hepatocellular carcinoma occurring in white subjects resident in the United Kingdom. Focal nuclear labelling was seen in four cases (9%); surrounding cirrhotic tissue in one of these was negative for p53 expression. This study shows that p53 mutations are a rare event in hepatocarcinogenesis in Great Britain, an area of low aflatoxin exposure, and supports the concept of geographical variations in the cause and pathogenesis of hepatocellular carcinoma.     

Expression of cyclooxygenase-2 is associated with p53 accumulation in premalignant and malignant gallbladder lesions

AIM: To examine the relationship between cyclooxygenase-2 (COX-2) overexpression and p53 accumulation in gallbladder carcinoma and its precursor lesions. METHODS: Sixty-eight gallbladder tissue samples comprising 14 cases of normal gallblader epithelium, 27 cases of dysplasia (11 low-grade dyplasia and 16 high-grade dysplasia) and 27 adenocarcinomas were evaluated by immunohistochemistry for COX-2 expression and p53 accumulation. The relationship among COX-2 expression, p53 accumulation and clinicopathological characteristics was analysed. RESULTS: COX-2 was expressed in 14.3% of normal gallbladder epithelium, 70.3% of dysplastic epite hlium, and 59.2% of adenocarcinomas. When divided into low- and high-grade dysplasia, COX-2 was positive in 5 (45.4%) cases of low-grade and 14 (87.5%) of high-grade dysplasia (P = 0.019). Accumulation of p53 was detected in 5 (31.2%) cases of high-grade dysplasia and in 13 (48.1%) of carcinomas. No p53 accumulation was found in normal epithelium or low-grade dysplasia. COX-2 overexpression was observed in 17 of 18 (94.4%) cases with p53-accumulation in comparison with 20 (40.0%) out of 50 cases without p53 accumulation (P < 0.001). CONCLUSION: The significant differences in COX-2 expression among normal epithelium, low-grade dysplasia and high-grade dysplasia suggest that overexpression of COX-2 enzyme is an early event in gallbladder carcinogenensis. Furthermore, since accumulation of p53 correlates with COX-2 expression, COX-2 overexpression observed in gallbladder high-grade dysplasia and carcinoma might be partly due to the dysfunction of p53.     

非小细胞肺癌组织中MinaS3、p53、PCNA的表达及意义

目的 探讨Mina53在非小细胞肺癌中的作用及Mina53、p53、增殖细胞核抗原（PCNA）在其中联合表达的意义。方法用免疫组化S-P法检测34例非小细胞肺癌组织,10例正常肺组织中Mina53、p53、PCNA的表达。结果在正常肺组织中Mina53、p53、PCNA表达量都很少,而在非小细胞肺癌组织中均高度表达。在非小细胞肺癌组织中,Mina53的阳性表达率是52．94％（18／34）,其表达与临床病理分型、淋巴结转移有明显的相关性（P〈0．05）。p53、PCNA的阳性表达率分别是64．71％（22／34）、76．47％（26／34）,其与各临床病理参数均无相关性（P〉0．05）。Mina53、p53、PCNA在非小细胞肺癌组织中的表达两两之间均有相关性（P均〈0．01）。结论Mina53有可能成为非小细胞肺癌的标记物,Mina53与p53、PCNA在非小细胞肺癌中联合检测,可起到互补作用,较全面地反映非小细胞肺癌肿瘤细胞的增殖情况。