胃癌p53表达与其病理组织学和预后的关系

目的探讨不同部位胃癌的ｐ５３表达与其预后的相关性。方法采用免疫组化的方法对１７０例贲门癌和胃窦癌的ｐ５３表达及病理组织学和预后进行研究。结果在１７０例胃癌中ｐ５３阳性表达率为２８８％,其中胃底贲门癌的ｐ５３阳性表达率高于胃窦癌（３８８％∶２００％,Ｐ＜０．０５）。ｐ５３阳性组与ｐ５３阴性组的５年生存率无显著性差异（Ｐ＞０．０５）。ｐ５３蛋白表达不仅与５年生存率无关,而且与早期或进展期胃癌、胃癌的部位、有无淋巴结转移、有无局部淋巴管与血管浸润等无关。结论本研究结果表明,胃底贲门癌的ｐ５３免疫蛋白表达较胃窦癌高,但ｐ５３蛋白核染色不能作为判断胃癌预后的指标或参数。     

p53、p16、Cyclin D1表达与胃癌增殖细胞核抗原的关系

目的 探讨ｐ５３、ｐ１６、Ｃｙｃｌｉｎ Ｄ１表达与胃癌细胞增生状况的关系。方法 采用免疫组化ＡＢＣ法检测５８例胃癌中ｐ５３、ｐ１６、ＣｙｃｌｉｎＤ１和ＰＣＮＡ的表达状况,并对ＰＣＮＡ免疫阳性细胞作半定量分析。结果 ｐ５３、ｐ１６、Ｃｙｃｌｉｎ Ｄ１阳性表达率分别为５１．７％（３０／５８）、４８．３％（２８／５８）、５３．４％（３１／５８）;ｐ５３、Ｃｙｃｌｉｎ Ｄ１阳性组织中,单位面积ＰＣＮＡ阳性     

Prognostic significance of the coexpression of p53 protein and c-erbB2 in breast cancer

BACKGROUND: The expressions of p53 protein and c-erbB2 have been thoroughly analyzed as prognostic factors for breast cancer. However, the prognostic significance of the coexpression of p53 protein and c-erbB2 remains controversial. METHODS: The immunohistochemical expression of p53 protein and c-erbB2 was evaluated in 242 women with breast cancer. RESULTS: According to the combination of p53 protein and c-erbB2, a group negative for both (125 cases), a group positive for either one of these two parameters (99 cases) and a group positive for both (18 cases) were identified. The group positive for one factor had a significantly (P = 0.0045) worse disease-free survival (DFS) than the group negative for both, while the group positive for both had a significantly (P = 0.0023) worse DFS than the group positive for one factor. A multivariate analysis indicated that the relative risk of p53 protein alone and cerbB2 alone was 2.18 and 2.93, respectively, while the relative risk of the group positive for one factor and the group positive for both was 2.29 and 6.37, respectively . CONCLUSIONS: Breast cancer with a coexpression of p53 protein and c-erbB2 was thus found to have a more significant prognostic value than those with a positive expression for either of these two biological parameters, while the prognostic significance of these two parameters themselves remained independent of each other.     

胃癌组织中p53蛋白表达的临床意义

目的：观察ｐ５３蛋表达通融作为判断胃癌病的预后指标,为该指标的合理应用提供科学依据。方法 利用免疫组化技术检测１７１例胃癌切除标本内ｐ５３蛋白的表达,分析ｐ５３蛋白表达与临床病理及承后之间的关系,探讨ｐ５３蛋白表达与传统ＴＮＭ分期在预后中的关系。结果 ４３．３％的胃癌组织有ｐ５３蛋白表达,弥漫型胃癌中的ｐ５３蛋白表达率高于肠型胃癌（Ｐ〈０．０５）;有ｐ５３蛋白表达的胃癌组织易于发生洒巴结转移（Ｐ〈     

直肠癌远侧端黏膜p53的表达及其意义

目的:从分子病理学水平上探讨直肠癌的安全远侧切缘。方法:对45例中低位直肠腺癌下缘进行标记,PET/CT检查结合半定量免疫组织化学方法对直肠癌的远侧端黏膜p53表达进行研究。结果:直肠癌及远侧端直肠黏膜均可见p53表达,直肠癌组织中p53表达明显高于远侧端的直肠黏膜组织。直肠癌远侧端黏膜p53表达随着距离增大而减少,但有显著性异常改变只在有限的长度内(远侧端1.5cm),阴性对照中仍有p53的表达。肿瘤组织及直肠远侧端黏膜中p53表达与肿瘤大小、分期以及病理类型无关。结论:直肠腺癌远侧1.5cm长度的组织,p53明显异常表达,若从分子病理学角度来界定,2cm的直肠远侧端长度是安全的远侧切缘。     

p16、p53、CerbB2和ki-67在胃癌及癌前病变中的表达及意义

目的:探讨p16、p53、Cerb B2和ki-67在慢性胃炎、异型增生、胃癌及癌旁组织中的表达及临床意义。方法:采用免疫组织化学SP法对慢性胃炎组织、异型增生组织、胃癌组织及癌旁组织分别行p16、p53、Cerb B2和ki-67检测。结果:p16在慢性胃炎、低级别异型增生、高级别异型增生、胃癌及癌旁组织中的表达阳性率分别为25.49%、30.39%、33.93%、33.55%和32.69%。p53在慢性胃炎、低级别异型增生、高级别异型增生、胃癌及癌旁组织中的表达阳性率分别为0、0、21.43%、50.00%和13.46%。Cerb B-2在慢性胃炎、低级别异型增生、高级别异型增生、胃癌及癌旁组织中的表达阳性率分别为0、0、14.29%、25.66%和9.62%。ki-67在慢性胃炎、低级别异型增生、高级别异型增生、胃癌及癌旁组织中的表达阳性率分别为15.69%、43.14%、57.14%、75.66%和42.31%。结论:p16、p53、Cerb B-2和ki-67在癌前病变中异常表达,可作为判断胃癌及癌前病变的重要参考指标。     

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目的 探讨抑癌基因p53和血管内皮生长因子（VEGF）在胆囊癌发生发展中的作用。方法 采用免疫组化方法分别对24例胆囊癌、20例胆囊腺瘤和18例慢性胆囊炎进行p53和VEGF蛋白表达的检测。结果 胆囊癌的p53和VEGF的阳性表达率明显高于胆囊腺瘤和慢性胆囊炎（P＜0.01，P＜0.05），根据Nevin分期，胆囊癌S1、S2、S3期的p53阳性表达率明显高于S4、S53期（P＜0.05），而VEGF的阳性表达率在S4、S5期胆囊癌中高于S1、S2、S3期（P＜0.05）。胆囊癌中p53和VEGF的阳性表达明显相关（P＜0.05）。它们与胆囊癌病理分级均未发现明显相关性。结论 p53和VEGF的过度表达可能对胆囊癌的预后判断有一定作用。     

胰腺癌PTEN蛋白表达及其与p53表达相关性的研究

目的 分析胰腺癌PTEN蛋白表达以揭示其与胰腺癌生物学行为的关系,通过PTEN与p53蛋白表达相关性的研究,探讨p53突变对PTEN蛋白表达的影响。方法 应用免疫组织化学方法分析41例胰腺癌PTEN和p53蛋白表达。结果 41例胰腺癌中p53阳性表达16例。阴性表达25例;所有标本都有PTEN蛋白表达,其阳性物质定位与癌周正常组织相同,其中22例呈高表达(++),19例呈低表达(+),其表达高低与胰腺癌TNM分期有相关性(P<0.01);并与p53蛋白表达呈现相关(P<0.05);而与肿瘤分化程度无相关性。结论 胰腺癌罕见PTEN的完全失活;胰腺癌PTEN蛋白的亚细胞定位与正常组织相同;但其表达有高低之别,并与胰腺癌TNM分期有相关性,表明PTEN表达下降与胰腺癌侵袭行为及病程进展有关;而p53突变则是导致PTEN表达下降原因之一。     

Nuclear and cytoplasmic p53 expression in pharyngeal squamous cell carcinoma: prognostic implications

BACKGROUND: The role of p53 expression in human neoplasms is still controversial, and it has been associated with both favorable and unfavorable outcome of the patients. Also cytoplasmic expression of p53 protein has been reported to affect survival in some cancers. Furthermore, an association between p53 and beta-catenin expression has been demonstrated. We studied the expression of p53 in a large group of oropharyngeal and hypopharyngeal squamous cell carcinomas and its relation to catenin expression, histologic differentiation, clinical data, and prognosis. METHODS: Primary tumors for analyses were obtained from 123 patients diagnosed with squamous cell carcinoma of the oropharynx or hypopharynx between 1975 and 1998 in Eastern Finland. Immunohistochemistry was used to evaluate the expression of p53 as well as alpha-, beta-, and gamma-catenins. RESULTS: In the primary tumors (n = 123), the nuclear p53 expression index was low in 42 (34%), intermediate in 38 (31%), and high in 43 (35%) cases. Cytoplasmic p53 expression was present in 56 (46%) and absent in 67 (54%) tumors. In univariate analyses (Kaplan-Meier), hypopharyngeal primary site (p =.02), high T class (p <.0005), presence of distant metastases (p =.02), low Karnofsky performance index (p <.0005), high nuclear p53 expression index (p =.01), and positive cytoplasmic p53 expression (p =.04) predicted poorer overall survival (OS). In Cox proportional hazards model, only T class (p =.0005), Karnofsky performance index (p =.005), and nuclear beta-catenin expression (p =.038) predicted poorer OS. CONCLUSION: Positive cytoplasmic p53 expression and nuclear p53 overexpression seem to relate to more aggressive features and unfavorable outcome in pharyngeal squamous cell carcinoma (PSCC). However, unlike more traditional variables, p53 expression is not an independent predictor of disease outcome in PSCC.     

Cyclin G在胃癌组织中对p53-鼠双微基因2的负反馈调节作用

目的 探讨Cyelin G在胃癌组织中对p53-鼠双微基因2（Mdm2）负反馈调节循环中的作用及可能的相互关系。方法 应用免疫组织化学SP法检测48例胃癌及相应癌旁组织Cyclin G、Mdm2和p53的表达情况。结果 Cyclin G高表达于胃癌细胞核。Cyelin G，Mdm2和p53阳性率分别为64．6％、47．9％、29．1％，显著高于相应的癌旁组织（P〈0．05），Cydin G与Mdm2呈高相关性（Kappa=0．506），与p53呈低相关性（Kappa=-0．364），并且和胃癌组织学分类和Borrmann分型无关（P〉0．05）。结论 胃癌组织中Cyclin G、Mdm2和p53的异常表达可能与胃癌的发生与发展有关。Cyclin G通过Mdm2调节p53及其通路，可以作为胃癌基因治疗的靶点。     

重组人腺病毒p53对裸鼠人胃癌细胞移植瘤的抑制效果及不良反应

目的 探讨重组人腺病毒p53(rAd-p53)对胃癌细胞裸鼠移植瘤的抗肿瘤效应及相关不良反应.方法 将胃癌细胞SGC-7901注射于裸鼠皮下制成动物模型,分别用rAd-p53和盐酸表阿霉素(EPI)进行治疗.rAd-p53治疗组剂量为10μl浓度1012vp/ml,EPI治疗组剂量为1.25mg/kg,各组每3周给药7次,以生理盐水为对照组.结果 与对照组比较,rAd-p53治疗组和EPI治疗组肿瘤抑制率分别为80％和60％,差异有统计学意义(P＜0.01);rAd-p53和EPI治疗组之间比较差异无统计学意义(P＞0.05).没有实验动物死亡,rAd-p53治疗组2只裸鼠出现肝脏不良反应,EPI治疗组1只裸鼠心脏不良反应,上述反应均有病理学观察证实.结论 裸鼠体内实验证实rAd-p53对胃癌细胞具有抗肿瘤效应,但应注意其肝脏不良反应.     

Clinicopathologic significance of Her-2 and P53 expressions in gastric cancer

BackgroundTo detect the expression of HER-2 and P53 patients with gastric cancer and to analyze their correlation.MethodsA total of 249 gastric cancer patients with complete clinical data who received surgical treatment from China–Japan Union Hospital of Jilin University were selected. The expression of Her-2 and P53 were detected by immunohistochemistry using the streptavidin-biotin-peroxidase method. The correlations between HER-2 and P53 in gastric cancer were analyzed.ResultsThe positive rate of Her-2 and P53 expression was 37.3% (93/249) and 100% in all the specimens, respectively. The intensity of Her-2 expression was significantly different in patients with different degrees of gastric cancer cell differentiation (P = 0.012). Meanwhile, the expression of her-2 was closely related to whether the pathological type of gastric cancer was a signet-ring cell carcinoma (P = 0.022). Different percentage of positive P53 expression was closely related to the grade of tumor differentiation (P = 0.035) and positive Ki67 expression (P = 0.001). There was a significant positive correlation between HER-2 and P53 expression in gastric cancer (P = 0.003). These findings suggest that HER-2 and P53 have synergistic effects in gastric cancer.ConclusionHer-2 and P53 are important markers for invasion and metastasis of gastric cancer. Combined detection of P53 and Her-2 expression in gastric cancer tissue can be used to assess prognosis and screen cancer patients at high risk of metastasis.     

联合评估survivin和p53在胃癌组织中表达的临床意义及对预后的影响

目的 研究胃癌原发灶中survivin和p53的表达与临床病理特征,恶性潜能及预后的影响。方法 免疫组化法检测125例行根治切除胃癌组织中survivin和p53表达情况,采用单因素和多因素分析比较survivin和p53表达及其共同表达与临床病理特征和预后关系。结果 survivin和p53表达阳性率各自为57．6％（72例／125例）和59．2％（74例／125例）。survivin阳性表达率在弥漫型和组织分化差（均P〈0．01）、肿瘤浸润更深、有淋巴结转移、淋巴管浸润及进展期（P〈0．05）胃癌组织中显著增高。p53表达与淋巴结转移和淋巴管浸润（P〈0．037）相关。单因素分析显示,survivin和p53表达阳性分别与5年生存率有关（P=0．0050和P=0．0025）。多因素分析显示,survivin和p53共同表达患者预后更差（P=0．001）。结论 survivin和p53在胃癌组织中均有较高的表达率,survivin阳性表达和p53阳性表达分别提示预后不良,survivin和p53共同表达为胃癌根治术后独立的预后因子。     

胃癌组织中细胞周期素G和p53的表达及意义

目的研究胃癌组织中细胞周期素G(cyclin G)和p53基因的表达以及它们与胃癌生物学特性可能存在的相关关系。方法应用免疫组织化学S-P法检测42例胃癌组织的cyclin G和p53蛋白表达情况。结果胃癌组织中的cyclin G和p53的阳性表达率分别为69.0%和28.6%,二者呈低相关性,cyclin G的表达与肿瘤分期、淋巴结转移有关。结论cyclin G和p53可能是胃癌相对独立的始动因素,并互相促进参与胃癌的发生和发展。     

p53 overexpression and K-ras gene mutations in primary sclerosing cholangitis-associated biliary tract cancer

Cholangiocarcinoma occurs frequently in patients with primary sclerosing cholangitis (PSC). We evaluated the incidence and prognostic significance of p53 protein overexpression and K-ras gene mutations in patients with biliary tract cancer and PSC. p53 protein expression was determined in specimens from 12 patients with biliary tract cancer, using the antibody, D07. K-ras mutations were detected using DNA sequencing and a mutation ligation assay. Accumulation of p53 protein was detected in 6 of 12 tumors (50%). K-ras mutations were detected in 4 of 12 tumors (33%). Overall survival in patients with p53-negative tumors was significantly longer (P < 0.05) than that in patients with p53-positive (mutant) tumors. Similarly, overall survival was significantly longer (P < 0.05) in the absence of a K-ras mutation than in patients with a tumor containing a K-ras mutation. Mean interval from the time of diagnosis of PSC until the diagnosis of biliary tract cancer was significantly shorter (P < 0.05) in patients with p53 overexpression than in those patients without p53 overexpression (2 versus 47 months). p53 overexpression and K-ras mutations occur commonly in patients with PSC and biliary tract cancer and are associated with a shortened survival. Patients with longstanding PSC are less likely to have these genetic alterations and may have a better prognosis. Received: September 24, 1999 / Accepted: June 6, 2000     

Crk在胃癌中的表达及其临床意义

目的: 探讨接头蛋白Crk在胃癌组织中的表达及其与胃癌临床病理因素及预后的关系。方法: 采用免疫组织化学方法检测368例胃癌病人肿瘤组织和配对癌旁组织Crk蛋白表达水平,分析其表达与临床病理因素及预后之间的关系。结果: 与癌旁组织相比,胃癌组织中Crk蛋白表达水平明显升高（P<0.05）。其表达水平与肿瘤大小（P<0.05）、浸润深度（P<0.05）、淋巴结转移（P<0.05）、TNM 分期（P<0.05）密切相关。Crk蛋白表达水平越高,病人预后越差（P<0.05）。多因素分析表明,Crk蛋白是影响胃癌病人预后的独立危险因素。结论: Crk蛋白在胃癌的发生、发展中起重要作用,可作为预测胃癌预后的分子标志物。     

VEGF和p53在胰腺癌中的表达及意义

目的　探讨胰腺癌组织中血管内皮生长因子 (VEGF)及p5 3蛋白的表达及其临床病理意义。方法　采用SP免疫组织化学方法 ,对 46例胰腺癌组织中VEGF及 p5 3蛋白的表达进行检测。结果　VEGF与 p5 3表达率分别为 65 .2 %和 5 8.7%。p5 3表达与VEGF表达呈明显正相关(P <0 .0 5 )。VEGF表达与胰腺癌淋巴结转移 (P <0 .0 5 )和远处转移 (P <0 .0 1)显著相关 ,而与肿瘤大小 ,病理学分级无关 ,p5 3表达与胰腺癌远处转移 (P <0 .0 5 )显著相关 ,而与肿瘤大小 ,病理学分级及淋巴结转移无关。结论　在胰腺癌中 ,VEGF表达与 p5 3蛋白的表达呈正相关 ,在胰腺癌的转移中起重要作用     

Ki-67抗原和p53蛋白在胃癌中的表达及其临床意义

目的 研究Ki-67抗原和p53蛋白在胃癌组织中的表达水平及其与胃癌生物学行为和预后的关系.方法 应用免疫组化方法检测232例胃癌组织中Ki-67抗原和p53蛋白的表达水平. 结果 Ki-67抗原和p53蛋白表达之间呈显著正相关（P＜0.001）.Ki-67抗原和p53蛋白表达水平与胃癌淋巴结转移均密切相关,而与性别、年龄、肿瘤大小、肿瘤部位、组织类型、浸润深度、远处转移、pTNM分期无关.Ki-67抗原、p53蛋白表达阳性其3年生存率均显著低于表达阴性者（P=0.006,0.007）,且Ki-67-/p53- 组的胃癌患者3年生存率显著高于其他组（Ki-67-/p53＋,Ki-67＋/p53-,Ki-67＋/p53＋）（P=0.011,0.017,0.001）.多因素生存分析显示p53蛋白水平是独立的预后因素（P=0.002）. 结论 Ki-67抗原和p53蛋白表达与胃癌淋巴结转移及预后有关,p53蛋白水平是独立影响胃癌预后的重要参数;联合检测Ki-67抗原和p53蛋白时,只要任1项阳性即提示不良预后.     

p53对胃癌细胞BGC823中Survivin基因表达的影响

目的 探讨p53基因对胃癌细胞株BGC823中Survivin基因表达的影响及其作用机制。方法 应用逆转录-聚合酶链反应（RT-PCR）和Western blot技术检测胃癌细胞株BGC823中Survivin和p53基因表达情况；利用质粒pcDNA3．0-rpS3转染该细胞株。应用实时聚合酶链反应（PCR）和Western blot检测细胞在培养后不同时间点Survivin mRNA和蛋白表达水平。结果 确认了胃癌细胞株BGC823中Survivin和突变型p53基因的表达。受野生型p53质粒转染的胃癌细胞在培养16和24h后，Survivin mRNA和蛋白质水平呈明显下降趋势。结论 野生型p53在转染胃癌细胞株BGC823后可显著抑制后者Survivin基因的转录和表达。