p53蛋白在食管鳞癌中表达的研究

目的：研究ｐ５３蛋白在食管鳞癌中的表达，以及在食管鳞癌的发生、发展中所起的作用及其与预后的关系。方法：应用免疫组化ＬＳＡＢ法检测１８１例食管鳞癌组织，３０例出现转移性食管鳞癌的淋巴结及１０例正常官粘膜组织。结果：１０例正常食管粘膜未发现ｐ５３表达，１８１例食管鳞癌ｐ５３阳性率为４７％；ｐ５３阳性病例癌旁非典型增生上皮出现ｐ５３表达，而ｐ５３阴性病例癌六非典型增生上皮亦为ｐ５３阴性。３０例原发部位及     

食管癌手术切缘组织p53突变研究

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食管癌组织中p53蛋白表达的临床意义

目的 :探讨p53蛋白表达在食管癌中的临床意义。方法 :用鼠抗人p53单克隆抗体 ,以SP免疫组化法检测p53蛋白。结果 :p53蛋白阳性表达率为 56 3% ,其表达与肿瘤大小、TNM分期、有无淋巴结转移无关 (P >0 0 5) ,与肿瘤分化程度有关 (P <0 0 1)。p53蛋白阳性组与阴性组比较 ,其术后生存率有显著差异 (P <0 0 1)。结论 :食管癌组织中p53蛋白表达与肿瘤大小、TNM分期及有无淋巴结转移无关 ,与肿瘤分化程度密切相关 ,并可用于判断预后     

喉癌切缘组织中p53 p21及PCNA表达及其与肿瘤复发的关系

目的:研究早期喉癌手术切缘阴性组织中p53、p21及PCNA表达的相关性及其与肿瘤复发的关系。方法:选取唐山市协和医院2004年1月至2010年12月间92例早期喉癌患者为研究对象,采用免疫组织化学法联合检测肿瘤及其切缘组织中p53、p21及PCNA的表达情况。电话随访2年以上,对患者生存及肿瘤复发情况进行观察。结果:p53、p21及PCNA蛋白在喉癌组织中的表达与肿瘤的分级及分期无关。92例喉癌患者术后2年内有16例出现复发,复发率为17.39%。喉癌阴性切缘复发和未复发标本中p53、p21及PCNA蛋白表达阳性的切缘复发率分别为50.00%、34.21%和33.33%,明显高于p53、p21及PCNA蛋白表达阴性的切缘（8.33%、5.56%和9.68%）。经统计学分析,喉癌复发标本3种蛋白切缘阳性率明显高于未复发标本,均有显著性差异（P＜0.01）。此外,喉癌阴性切缘组织中p53与p21蛋白的表达有明显的相关性,PCNA的表达与p21的表达亦有明显的相关性。结论:早期喉癌手术病理阴性切缘组织中的p53、p21及PCNA是患者预后的重要生物学标志,联合检测喉癌切缘组织中p53、p21及PC? NA的表达有望作为预测喉癌复发的指标。      

食管癌组织中p53蛋白表达的临床意义

目的：探讨ｐ５３蛋白表达在食管癌中的临床意义。方法：用鼠抗人ｐ５３单克隆抗体,以ＳＰ免疫组化法检测ｐ５３蛋白。结果：ｐ５３蛋白阳性表达率为５６．３％,其表达与肿瘤大小、ＴＮＭ分期,有无淋巴结转移无关（Ｐ〉０．０５）,与肿瘤分化程度有关（Ｐ〈０．０１）。ｐ５３蛋白阳性组与阴性组比较,其术后生存率有显著差异（Ｐ〈０．０１）。结论：食管癌组织中ｐ５３蛋白表达与肿瘤大小,ＴＮＭ分期及有无淋巴结转移无关,与     

食管癌p53、PCNA表达与局部体液免疫的关系

目的：对８０例食管浸润癌组织中的局部体液免疫即ＩｇＧ、ＩｇＭ、ＩｇＡ产生细胞及Ｐ５３蛋白、ＰＣＮＡ进行检测,以探索局部体液免疫对抑癌基因突变及细胞增殖活性的影响。方法：采用直接免疫荧光染色法和Ｓ－Ｐ免疫组化染色法。结果：ＩｇＧ产生细胞与Ｐ５３蛋白,ＰＣＮＡ的表达呈负相关;ＩｇＧ阳性而Ｐ５３、ＰＣＮＡ阴性的病例,淋巴结转移及浸润的程度显著降低,ＩｇＡ、ＩｇＭ与Ｐ５３突变及ＰＣＮＡ的表达无关。结论：Ｉ     

食管鳞状细胞癌p53蛋白的免疫组化研究

应用ｐ５３单克隆抗体对６４例食管鳞癌病例进行了ＡＢＣ免疫组化染色，结果发现阳性染色物质核浆中均存在。６４例鳞癌标本在肿瘤区，癌旁组织以及“正常区”组织中的ｐ５３蛋白阳性率分别为６４．１％（４１／６４），２０．３％（１３／６４）和４．７％（３／６４），按病理Ⅰ、Ⅱ、Ⅲ分级分类，其阳性率分别为４１．７％，６１．１％和９０．９％，三级标本比较，ｐ５３蛋白表达有显著差异（Ｐ〈０．０１）。按淋巴结转移和未转     

食管鳞状细胞癌中雌激素受体和p53蛋白的表达及其意义

 目的　探讨ER和p53蛋白表达与ESCC的临床病理关系。方法　应用免疫组织化学方法检测了ESCC中ER和p53蛋白的表达。结果　47例ESCC中,ER阳性者19例,其表达率为40.4%(19/47);生存期大于5年组与生存期小于5年组相比,具有显著性差异(P<0.05);p53蛋白表达者29例,表达率为61.7%(29/47);其阳性率在淋巴结有无转移,病人生存期长短之间存在明显差异。ER阳性ESCC的p53蛋白阳性表达率高于ER阴性ESCC,具有统计学差异。结论　ER阳性的食管癌与p53蛋白表达密切相关。ER及p53蛋白的表达与ESCC的预后密切相关。     

食管癌p53基因蛋白检测的临床意义

目前已证实ｐ５３基因突变、缺失或失活与许多肿瘤的发生发展密切相关。本文旨在探讨ｐ５３基因与食管癌的相关性，评价其在食管癌的诊断、预后的临床应用价值。１材料与方法选取本院食管手术切除标本共６５例，其中鳞癌３０例，腺癌１５例，未分化癌１４例，鳞状上皮不典...     

食管癌中p53蛋白积聚与耐药表型的相关性研究

目前人们发现,ｐ５３失活在肿瘤的发生发展中占有重要地位。ｐ５３参与细胞凋亡,因而ｐ５３的失活可能影响到肿瘤细胞对化疗的敏感性。Ｐ－糖蛋白（Ｐｇｐ）在肿瘤产生对化疗药物的耐受方面发挥着重要作用,但有关二者的相关性研究国内外报道甚少。为进一步探讨在食管癌...     

食管鳞状细胞癌中PINCH蛋白的表达及意义

 目的探讨PINCH蛋白在食管鳞状细胞癌中的表达及其临床病理意义。方法采用免疫组化ABC法检测10例正常食管粘膜组织和64例食管鳞状细胞癌组织中PINCH蛋白的表达,并分析其临床意义。结果PINCH蛋白在鳞癌组织相关间质中呈异质性表达,其阳性率为56.25%(36/64),明显高于正常食管粘膜组织(0/10)(P<0.05),差异有显著性,而且在肿瘤浸润边缘阳性更明显。PINCH蛋白表达与患者性别、年龄及鳞癌组织学分级无相关性;淋巴结转移组的鳞癌组织中PINCH蛋白阳性表达率为90%(18/20),未转移组鳞癌病例中阳性率为40.91%(18/44),二者相比差异有显著性(P<0.05)。结论PINCH蛋白在食管鳞癌中异常表达,可能利于肿瘤的浸润和转移。提示PINCH蛋白可作一个肿瘤相关间质的标志物来预测肿瘤浸润和淋巴结转移的能力。在肿瘤的预后判断上有重要意义,并可能成为与肿瘤间质相关的抗肿瘤治疗的一个新靶点。     

Prognostic Significance of Proliferating Cell Nuclear Antigen (PCNA) in Squamous Cell Carcinoma of the Esophagus

Proliferating cell nuclear antigen (PCNA) has been shown tobe of prognostic significance in some gastrointestinal tumors.Immunohistochemical analysis was performed to determine whetherPCNA is useful for predicting the outcome of patients with squamouscell carcinoma of the esophagus. Using a mouse monoclonal antibody,PC 10, the expression of PCNA was studied in resected squamouscell carcinomas of the esophagus from 59 patients who had undergonecurative esophagectomy. None had received any preceding therapy.The proliferation rate was assessed in terms of the percentageof the PCNA-positive nuclear area relative to the total areaof cancer nuclei using a cell analysis system (CAS). Clinicopathologicalvariables including PCNA staining were assessed in relationto prognosis. Survival rate was obtained by the Kaplan-Meiermethod. The PCNA indices (percentage of the positive nucleararea) of the tumors varied from 4.4% to 96.2%. Among the clinicopathologicalvariables, only tumor size (5 cm) and depth of invasion werecorrelated significantly with PCNA index (P<0.05). Microscopically,PCNA was stained in non-keratinized cells but not in keratinizedcells. However the histological grade was not correlated withPCNA index. The survival rate was significantly worse in patientswith high PCNA indices (40%) than in those with low indices(<40%) (P<0.05). However, multivariate analysis revealedthat PCNA index was not an independent prognostic factor.     

Prognostic Value of PCNA and Mutant p53 Expression in Laryngeal Squamous Cell Carcinoma

The objective of this study was to investigate the prognostic significance of p53, and proliferative cell nuclear antigen (PCNA) in laryngeal squamous cell carcinoma (LSCC). Sixty pathologic specimens from the patients with LSCC were examined for the expression of the p53 and PCNA, with complete follow-up data. Sixty-three percent of the cases displayed nuclear p53 overexpression. There was a correlation between p53 overexpression and histological grades (p = 0.03), and localization site (p = 0.05). Median of PCNA index was 42.2 (range 5.9 to 85.2). There was no difference between the p53 overexpression group and the normal group in proliferative activity determined by PCNA (p = 0.73). In univariate analyses, localization site, grade, stage, invasion pattern, lymph node status, were significant factors in estimating disease free survival (DFS). Grade was the most important factor affecting recurrence (p = 0.002). In multivariate analyses, grade was the only significant predictor for DFS (p = 0.001). Grade (p = 0.001) and invasion pattern (p = 0.03) were found to be significant predictors of overall survival. In conclusion, the histological grade was the most reliable important prognostic factor. Further studies are necessary to facilitate understanding of the mechanisms of laryngeal carcinogenesis.     

食管鳞状细胞癌组织中P53蛋白的积聚及其临床意义

采用免疫组化方法，以DO—7单克隆抗体检测57例食管鳞状细胞癌组织中P53蛋白的表达。结果：48例癌组织有不同程度的P53蛋白积聚，阳性率为84．21％（48／57）。从21例有淋巴结转移的病例共取得61个有转移癌淋巴结，其中58个淋巴结中转移癌呈DO－7阳性，与其原发癌相比，阳性程度增高。将癌组织中P53蛋白积聚情况与病人临床病情分期进行比较，分析结果显示晚期病人癌组织中P53蛋白聚积有增加趋势。除此之外，对57修例食管鳞状细胞癌进行了PCNA染色，绝大多数P53阳性的癌细胞也呈PCNA阳性，二者呈明显的正相关，表明有P53蛋白积聚的癌细胞具有更活跃的增殖能力。本文结果提示，食管鳞状细胞癌中P53蛋白积聚与肿瘤演进有一定关系。     

食管鳞癌中p53、PCNA和EGFR的表达与化疗疗效的关系

目的:探讨p53、PCNA和EGFR在食管鳞癌中的表达情况与化疗疗效的关系。方法:对66例食管鳞癌化疗前的活检标本用免疫组化技术分别检测p53、PCNA、EGFR的表达。结果:p53蛋白积聚阳性组化疗有效率(16.7%)明显低于p53蛋白积聚阴性组(70.8%)(P<0.01),PCNA过表达组化疗有效率(79.4%)高于PCNA弱表达组(31.3%)(P<0.01),EGFR过表达组化疗有效率(30.4%)低于弱表达组(69.8%)(P<0.01)。经Logistic回归分析,3个指标中,PCNA对化疗疗效的预测价值较大(P<0.01)。结论:食管鳞癌中p53、PCNA和EGFR的表达情况对化疗疗效均有一定的预测价值。其中PCNA价值较大。     

抑癌基因p53在不同地区食管癌中的表达及临床预后分析

目的：比较中国食管癌高，低发区p53蛋白的积聚，燕对p53蛋白积聚与肿瘤细胞增殖及临床预后的关系进行探讨。方法：用免疫组化LSAB法检测高发区（河南）43例食管癌和低发区（广东）40例食管癌p53蛋白及增殖细胞核抗原的表达。结果：p53蛋白阳性率分别是60．5％（河南）和57．5％（广东）。阳性率差异无显著性（P＞0．05）。p53蛋白表达无论在高，低发区均与PCNA的表达密切相关（P＜0．001）。结论：食管癌不同的高，低发区中p53蛋白的各聚是类同的。大多数p53蛋白积聚的肿瘤细胞是处于细胞增殖周期内，可能成为食管癌恶性程度的指标之一，将为临床分析预后提供客观依据。     

nm23和p53蛋白在喉鳞癌组织中表达的意义

应用免疫织化技术，检测了32例喉鳞癌组织及12例癌旁异型增生组织的nm23和p53蛋白的表达情况。结果发现：nm23与p53在喉鳞癌组织的阳性表达率分别是87．50％及84．38％。在癌旁异型增生组织阳性表达率分别为100％和20％。nm23的表达与喉鳞癌的组织学分级有关，p53的表达与喉鳞癌组织学分级无关，但p53的强阳性表达预示预后不良。     

肺鳞癌中p53 与PCNA 的表达及临床意义

 目的 研究p53蛋白、增殖细胞核抗原(prolifeirating cell nuclear antigen PCNA)在肺鳞癌中的表达及其与临床病理的关系。方法 采用免疫组化技术(S-P法)对36例肺鳞癌组织及10例正常支气管黏膜组织进行p53蛋白与PCNA的检测。结果 p53蛋白与PCNA在肺鳞癌组织中的表达明显高于正常组织，在肺鳞癌组织中的阳性表达率分别为58．3％(21／36)，91．7％(33／36)；PCNA强阳性表达率为61．1％(22／36)；p53阳性表达率及PCNA强阳性表达率均与肺癌组织的分化程度、肿瘤组织大小、淋巴转移等因素密切相关，差异具有显著性(P<0．05)；p53蛋白阳性表达与PCNA阳性表达呈正相关(P<0．05)。结论 联合检测p53蛋白和PCNA对判断肺鳞癌的恶性程度、淋巴转移趋势具有重要价值。     

Peritumoral Retraction Clefting Correlates with Advanced Stage Squamous Cell Carcinoma of the Esophagus

The present study was designated to analyze correlation between the presence and extent of peritumoral retraction clefting and various clinicopathologic features in esophageal squamous cell carcinoma (ESCC), and to possibly establish the significance of this phenomenon in ESCC. Fifty-four consecutive patients with advanced ESCC were included in the study. The presence of peritumoral retraction clefting was classified on the basis of the proportion of tumor nests exhibiting this phenomenon. Tumors with clefts that affected up to 25% of tumor nests were classified as group I; with clefts that affected >25% to 50% of tumor nests as group II; with clefts that affected >50% to 75% of tumor nests as group III; and tumors with clefts that affected more than 75% of tumor nests were classified as group IV. Statistical analysis showed a correlation between presence and extent of peritumoral clefting and lymph node metastasis. T3 tumors and tumors with lymph node metastasis had significantly more pronounced peritumoral clefting compared with T2 tumors and tumors without lymph node metastasis. The presence of peritumoral clefting was not associated with the number of affected lymph nodes. There was no correlation between the presence and extent of peritumoral clefting with patient age and sex, and tumor location, diameter and grade. The association of peritumoral retraction clefting in ESCC with local invasiveness and lymph node metastasis indicated that peritumoral clefting could be a simple and useful morphological feature of tumor aggressiveness and may contribute to the pathological and clinical assessment of patients with ESCC.