肝细胞癌p53和VEGF的表达及其与肿瘤血管形成的关系

目的 :研究p5 3和血管内皮生长因子 (vascularendothelialgrowthfactor ,VEGF)的表达和肿瘤微血管密度 (microvesseldensity ,MVD)测定在人肝细胞癌 (HCC)中的意义。方法 :采用免疫组织化学方法 ,检测 5 0例HCC患者手术切除标本p5 3和VEGF的表达 ,并用抗CD3 4 抗体标记癌组织血管内皮细胞 ,计算MVD。结果 :p5 3、VEGF总阳性表达率分别为 5 4 0 % (2 7 5 0 )和 76 0 % (38 5 0 ) ,p5 3、VEGF的表达和MVD均与HCC组织病理分级呈正相关 ,P <0 0 5。p5 3和VEGF的阳性表达符合率为 74 % (37 5 0 ) ,两者的表达呈相关性 ,P <0 0 5。p5 3阳性和VEGF阳性的癌组织MVD分别为 178± 6 2和 175±5 9 ,而相应的阴性组分别为 12 5± 5 1和 131± 6 1,两者差异有显著意义 ,P <0 0 5。p5 3、VEGF表达均为阳性者 ,MVD为 176± 6 3;p5 3、VEGF的表达均为阴性者 ,MVD为 12 3± 5 2 ;两者差异有显著意义 ,P <0 0 5。结论 :1)p5 3、VEGF的表达以及MVD的测定可作为判断HCC恶性潜能的重要生物学指标 ;2 )p5 3、VEGF的表达对肿瘤血管形成可能起重要作用 ,联合检测p5 3、VEGF的表达对了解肿瘤血管形成的机制有一定意义     

p53、血管内皮生长因子在大肠癌组织中的表达与血管生成

目的　探讨p53、血管内皮生长因子 (VEGF)在大肠癌组织中的表达及其与血管生成的关系。方法　利用免疫组化SABC法 ,对 1 0 6例大肠癌组织及 2 0例正常大肠组织中的 p53、VEGF的表达及微血管密度 (MVD)进行研究。 结果　p53、VEGF的表达与肿瘤的分化程度及Dukes分期无明显相关性 (P >0 .0 5 )。p53表达阳性或VEGF表达阳性的大肠癌组织MVD明显高于p53表达阴性 (P <0 .0 1 )或VEGF表达阴性者 (P <0 .0 1 )。p53表达阳性的大肠癌组织中VEGF的表达阳性率显著高于 p53表达阴性者 (P <0 .0 1 )。结论　p53、VEGF在大肠癌的发生和发展中起着重要作用 ,可反映大肠癌的恶性程度和进展情况并作为预后的指标 ,p53作用的发挥是通过上调VEGF的表达水平来实现的     

p53和血管内皮生长因子表达与胃癌血管生成的关系

目的 :探讨p5 3和血管内皮生长因子表达与胃癌血管生成的关系。方法 :应用免疫组织化学方法检测 76例胃癌组织的p5 3蛋白、血管内皮生长因子 (VEGF)与微血管密度 (MVD)表达 ,分析p5 3蛋白、VEGF及MVD表达与临床病理指标之间的关系。结果 :胃癌组织p5 3蛋白与VEGF阳性表达率分别为 4 2 1% (32 76)和 38 2 % (2 9 76) ,MVD平均计数为 36 6± 17 2 ( x±s) ;p5 3、VEGF、MVD表达与肿瘤浸润深度 (P <0 0 5 ,P <0 .0 1,P <0 .0 5 )、淋巴结转移 (P <0 0 1,P <0 0 5 ,P <0 0 1)和远处转移 (P <0 0 1,P <0 0 1,P <0 0 1)密切相关 ;p5 3蛋白与VEGF表达密切相关 (χ2 =35 3916,P <0 0 1,P <0 0 1)。结论 :VEGF与MVD表达是反映胃癌生物学行为的重要标志 ,p5 3表达可能通过上调VEGF而促进胃癌血管生成     

食管癌VEGF与p53蛋白表达的临床意义

目的探讨食管癌VEGF与p53蛋白表达在食管癌的病理学意义及其与血管新生的关系。方法选择40例手术切除的食管癌标本,确定其病理学特点,并对其VEGF与p53蛋白和微血管进行免疫组织化学染色,明确VEGF与p53蛋白表达和血管新生的强度。结果VEGF表达阳性率为67.5％,p53蛋白表达阳性率为50.0％。MVD值为29.00±24.56。有淋巴结转移者与无淋巴结转移者VEGF表达的阳性率有明显差异(P<0.05)。VEGF表达阴性、弱阳性及强阳性者间MVD值比较均有显著差异(P值均<0.05)。p53蛋白表达阴性、弱阳性及强阳性者间MVD值比较无显著差异(P值均>0.05),与VEGF表达阳性率也无显著差异(P值均>0.05)。结论食管癌VEGF表达与血管新生密度及与淋巴结转移均有显著相关。p53蛋白表达与VEGF表达及血管新生强度均可能无密切关系。     

一氧化氮在脑胶质瘤血管生成中的作用及其与VEGF、p53的关系

目的　探讨一氧化氮在脑胶质瘤血管生成中的作用及其调控途径。方法　采用免疫组化法 ,检测 40例脑胶质瘤组织中iNOS的表达及iNOS阴性组和阳性组中Ⅷ因子、VEGF和突变型 p5 3蛋白的表达 ,分析其相互关系。 结果　胶质瘤中iNOS阳性表达率为 62 .5 % ,明显高于对照组 (P <0 .0 1) ;iNOS阴性组微血管密度为 ( 2 2 .40± 12 .62 )个 /视野 ,iNOS阳性组为 ( 36.90±2 2 .2 1)个 /视野 ,两者有显著性差异 (P <0 .0 5 ) ;iNOS阳性组VEGF阳性细胞数明显高于iNOS阴性组 (P <0 .0 1) ;p5 3突变组iN OS阳性表达率明显高于未突变组 (P <0 .0 5 ) ;p5 3蛋白与iNOS共同表达时 ,Ⅲ、Ⅳ级胶质瘤中两者共同表达率明显高于Ⅰ、Ⅱ级 ,且有相关性。结论　NO参与了胶质瘤的血管生成 ,促进了肿瘤的生长和侵袭 ,NO在胶质瘤生物学行为中的作用与VEGF和p5 3蛋白密切相关 ,存在 1种相互控制的关系 ,VEGF和 p5 3蛋白对NO通路的调控为胶质瘤基因治疗提供了新的思路     

肝细胞肝癌中VEGF、p53、mdm2蛋白表达及其相互关系

目的　研究肝细胞肝癌 (HCC) VEGF、p5 3、m dm2蛋白表达及其相互关系。方法　用免疫组化 S- P法或SAP法检测 HCC组织 VEGF、mdm2和 p5 3蛋白表达 ,计数微血管密度 (MVD) ,并与临床病理指标比较分析。结果　 72例 HCC中 VEGF、p5 3、mdm2蛋白阳性表达分别为 6 2 .5 %、4 1.6 %和 33.3% ;VEGF和 p5 3,VEGF和 m dm2 ,mdm2和 p5 3蛋白表达有相关性 (P<0 .0 5 )。 2 5例癌旁组织中 VEGF蛋白阳性表达为 2 0 .0 % ,m dm2蛋白阳性表达为 8.0 % ,p5 3蛋白阳性表达为 8.0 %。肝癌组织和癌旁组织 VEGF、m dm2和 p5 3蛋白表达差异有显著性 (P<0 .0 5 )。 10例正常肝组织无 VEGF、mdm2和 p5 3蛋白表达。 HCC组织中 VEGF、p5 3、mdm2蛋白阳性表达以及高MVD与血管侵犯和转移倾向明显相关 (P<0 .0 5 )。结论　 HCC组织中 VEGF、p5 3、mdm2蛋白过表达。p5 3突变和mdm2蛋白过表达 ,是 VEGF表达上调的原因之一 ,并与 HCC组织中血管侵犯和转移倾向有关     

非小细胞肺癌组织中血管内皮生长因子的表达与微血管密度的关系

 目的　探讨非小细胞肺癌 (NSCLC)组织中血管内皮生长因子 (VEGF)表达和微血管密度(MVD)的关系。方法　采用免疫组化S P法对 76例NSCLC标本中VEGF表达和MVD进行了检测。结果　在NSCLC中鳞癌的VEGF表达阳性率显著高于腺癌 (P <0 .0 5 ) ;VEGF表达阳性率和MVD值与肿瘤组织学分化程度有关 ,低分化癌VEGF表达阳性率和MVD值显著高于中、高分化癌 (P <0 .0 5 ) ;淋巴结转移阳性组NSCLC的VEGF表达阳性率和MVD值显著高于阴性组 (P <0 .0 5 )。结论　VEGF可引起瘤内MVD增多 ,促进肿瘤的生长和转移 ;检测VEGF表达强度 ,可作为判定NSCLC转移潜能和评价预后的指标     

胃癌p16、p53和CD_(44)V_6的表达特点及其意义

目的　探讨p16、p5 3和CD4 4V6在胃癌发生、发展及淋巴结转移的作用机理和意义。方法　用免疫组化ABC法检测p16、p5 3和CD4 4V6在 93例胃癌组织中的表达。结果　 93例胃癌中p16、p5 3和CD4 4V6的阳性表达率分别为 39 8%、5 0 5 %、41 9%。p16蛋白在淋巴结转移阳性组的阳性表达率 30 8% ,显著低于淋巴结转移阴性组的阳性表达率 6 0 7% (P <0 .0 1)。p5 3在进展期胃癌、淋巴结转移阳性组的阳性表达率 5 4 9%、5 8 5 % ,显著高于早期胃癌、淋巴结转移阴性组的阳性表达率 18 2 %、32 1% (P <0 .0 5 ,P <0 .0 5 )。CD4 4V6在进展期胃癌、淋巴结转移阳性组的阳性表达率 43 .8%、5 2 .3 % ,显著高于早期胃癌、淋巴结转移阴性组的阳性表达率 9 1%、17 9% (P <0 .0 5 ,P <0 .0 1)。结论　p16蛋白的缺失表达对胃癌的淋巴结转移起重要作用。p5 3、CD4 4V6的高表达对胃癌的浸润、转移起重要作用 ,对分析胃癌的生物学行为和判断预后有重要意义。     

骨巨细胞瘤组织中p53和VEGF表达的意义

目的:探讨p53、血管内皮生长因子(vascular endothelial growth factor,VEGF)的表达与骨巨细胞瘤血管新生、肿瘤增殖、转移及复发的关系。方法:采用免疫组化法检测82例骨巨细胞瘤标本p53、VEGF、增殖细胞核抗原(proliferation cell muclear antigen, PCNA)、CD34表达,分析其与骨巨细胞瘤转移、复发的关系。结果: p53、VEGF 的阳性率分别为31 70%、57. 32%。VEGF阳性组p53阳性率为44. 68 %,增殖指数(proliferation index,PI)值、微血管密度(microvessel density, MVD)值分别为(55. 81±23 .42)%和(35. 17±12. 58)条,VEGF阴性组p53阳性率为14 .29 %, PI 值、MVD 值分别为(42 .41±25 .43)%和(24. 69±8 .66)条,不同VEGF表达组间p53表达、PI值、MVD值差异有统计学意义,P<0 .05(P值分别为0 .003、0 .016和0 .000),且MVD值、PI值与VEGF表达强度正相关,P<0 .05 (P值分别为0 .000和0 .004)。复发组VEGF、p53的阳性率分别为75 .86%和48. 28%,未复发组VEGF、p53的阳性率分别为47. 17%和22 .64%,两组间VEGF、p53的表达差异有统计学意义,P<0 .05(P值分别为0. 012和0. 017)。多因素logistic回归分析显示,VEGF、p53及手术方式对复发有显著影响,P<0 .05(P值分别为0 .027、0 .033和0 .009)。其中VEGF、p53为促进肿瘤     

大肠癌c-met、p53的表达与血管生成的关系

目的　探讨c met、p5 3在大肠癌中表达以及与微血管密度 (MVD)之间的关系。方法　应用免疫组化SP法检测 5 1例大肠癌、16例腺瘤、16例正常组织中c met、p5 3、MVD的表达。结果　大肠癌中c met、p5 3、MVD的阳性表达与癌组织的分期、淋巴结转移及远处转移有关 (P <0 .0 5 )。c met( )和p5 3 ( )的组织中MVD值 ( 3 2 .98± 10 .0 7,3 5 .44± 10 .42 )显著高于c met( -)和p5 3 ( -)者( 17.2 9± 8.65 ,2 2 .17± 9.5 4) (P <0 .0 5 )。c met、p5 3的表达与MVD计数均显著相关 (P <0 .0 5 )。结论　c met、p5 3均参与调控大肠癌的微血管生成。     

Immunohistochemical analysis of cyclin D1 and p53 in multiple myeloma: relationship to proliferative activity and prognostic significance

Conflicting data are reported on the clinical significance of cyclin D1 deregulation in multiple myeloma. The aim of this study was to evaluate the incidence and prognostic significance of cyclin D1 expression and p53 mutations in multiple myeloma, as well as the relationship of their expression with selected clinical data, histological features, and proliferative activity of myeloma cells. We analyzed bone marrow biopsy specimens obtained from 59 patients with newly diagnosed multiple myeloma. Expression of cyclin D1 and p53 was analyzed using standard immunohistochemical method of B5-fixed and routinely processed paraffin-embedded bone marrow specimens. Cyclin D1 was overexpressed in 14/59 (27%) and p53 in 5/59 (8.5%) specimens. There was no significant correlation between cyclin D1 overexpression and age, gender, clinical stage (Durie-Salmon classification), extent of osteolytic lesions, type of monoclonal protein, hemoglobin concentration, platelet count, serum concentration of creatinine, calcium, C-reactive protein, and beta2-microglobulin. No association was observed between the expression of cyclin D1 and the extent of bone marrow infiltration, histological grade, proliferative activity index (measured with Ki-67 immunoreactivity) and response to therapy. No significant difference was observed regarding overall survival between cyclin D1 positive and cyclin D1 negative patients (29 vs 36 mo, p = 0.76). Results of this study did not revealed prognostic significance of cyclin D1 overexpression in multiple myeloma. Mutations of p53 gene are rare events in myeloma, suggesting their limited role in the pathogenesis of the disease.     

Immunohistochemical analysis of cyclin D1 and p53 in multiple myeloma

Conflicting data are reported on the clinical significance of cyclin D1 deregulation in multiple myeloma. The aim of this study was to evaluate the incidence and prognostic significance of cyclin D1 expression and p53 mutations in multiple myeloma, as well as the relationship of their expression with selected clinical data, histological features, and proliferative activity of myeloma cells. We analyzed bone marrow biopsy specimens obtained from 59 patients with newly diagnosed multiple myeloma. Expression of cyclin D1 and p53 was analyzed using standard imunohistochemical method of B5-fixed and routinely processed paraffin-embedded bone marrow specimens. Cyclin D1 was overexpressed in 14/59 (27%) and p53 in 5/59 (8.5%) specimens. There was no significant correlation between cyclin D1 overexpression and age, gender, clinical stage (Durie-Salmon classification), extent of osteolytic lesions, type of monoclonal protein, hemoglobin concentration, platelet count, serum concentration of creatinine, calcium, C-reactive protein, and beta₂-microglobulin. No association was observed between the expression of cyclin D1 and the extent of bone marrow infiltration, histological grade, proliferative activity index (measured with Ki-67 immunoreactivity) and response to therapy. No significant difference was observed regarding overall survival between cyclin D1 positive and cyclin D1 negative patients (29 vs 36 mo, p=0.76). Results of this study did not revealed prognostic significance of cyclin D1 overexpression in multiple myeloma. Mutations of p53 gene are rare events in myeloma, suggesting their limited role in the pathogenesis of the disease.     

p53 nuclear accumulation is associated with extramedullary progression of multiple myeloma

Progression of multiple myeloma (MM) from intramedullary to extramedullary sites heralds an aggressive phase of the disease but to the best of our knowledge, biologic factors have not been studied in paired biopsies from medullary and extramedullary sites. In this study, we immunostained paired bone marrow and extramedullary biopsies from 12 cases of MM for p53, CD56 and MIB-1 (proliferative index). In addition, 22 cases of extramedullary plasmacytoma (EMP) without bone marrow involvement were included as a control group. p53 nuclear accumulations were detected in myeloma cells derived from the extramedullary sites in 9 (75%) of the 12 cases, whereas only 1 of (8%) 12 bone marrow myeloma specimens expressed p53 (P = 0.003). p53 expression was also more prevalent in extramedullary sites of MM than EMP (75% vs. 18%, P = 0.003). There was no significant difference in CD56 expression between intramedullary and extramedullary MM (17% vs. 33%, P = 0.64), or between intramedullary MM and EMP (17% vs. 38%, P = 0.25). The MIB-1 proliferation index increased significantly as plasma cells migrated from the bone marrow microenvironment to extramedullary sites (P = 0.0001). Our data indicates that p53 nuclear expression but not CD56 expression, along with increased proliferation index is associated with disease progression from intramedullary to extramedullary sites in MM.     

多发性骨髓瘤患者Survivin、VEGF表达及其相关性

目的:研究多发性骨髓瘤（MM）患者血清及骨髓Survivin、VEGF表达及意义。方法:酶联免疫法（ELASA）检测60例初诊多发性骨髓瘤患者及30例对照组患者血清Survivin、VEGF表达情况;免疫细胞化学法（SABC法）检测骨髓单个核细胞中Survivin、VEGF阳性率。酶联免疫法（ELASA）检测VAD联合沙利度胺治疗4周期后患者血清Survivin、VEGF水平,与治疗前比较。结果:初诊多发性骨髓瘤患者血清Survivin、VEGF表达水平较对照组明显升高;初诊骨髓瘤患者骨髓单个核细胞Survivin、VEGF阳性率较对照组明显提高;经统计学分析,P＜0.05,差异有统计学意义。治疗后患者,血清Survivin、VEGF在不同疗效组有差异,疗效良好组与疗效较差组差异比较,P＜0.05。骨髓中Survivin与VEGF表达阳性率呈正相关,与疾病疗效呈负相关。结论:Survivin及VEGF在多发性骨髓瘤患者中表达增加,二者表达水平与疾病疗效密切相关。二者存在协同关系,可作为评估疗效、预后指标。     

Expression of VEGF and microvessel density in patients with multiple myeloma: clinical and prognostic significance

The conflicting data are reported on the clinical significance of VEGF deregulation and intensity of angiogenesis in multiple myeloma. The aim of this study was to evaluate the incidence and prognostic significance of VEGF expression and microvessel density (MVD) in multiple myeloma, as well as the relationship of their expression with selected clinical data, histological features, and proliferative activity of myeloma cells. We analyzed bone marrow biopsy specimens obtained from 59 patients with newly diagnosed multiple myeloma. Expression of VEGF and MVD was analyzed using standard immunohistochemical method (antibodies against VEGF and CD34, respectively) on B5-fixed and routinely processed paraffin-embedded bone marrow specimens. MVD was estimated by counting the number of microvessels in three “hot spots” at 400× magnification. VEGF immunoreactivity was estimated on the basis of intensity and percentage of positive plasma cells. VEGF was expressed in 47/59 (79.7%) specimens. There was no significant correlation between VEGF overexpression and age, clinical stage, the extent of osteolytic lesions, type of monoclonal protein, hemoglobin concentration, platelet count, serum concentration of creatinine, calcium, and albumins, the extent of bone marrow infiltration, histological grade, and proliferative activity index (measured with Ki-67 immunoreactivity). No significant difference was observed regarding the overall survival between VEGF-positive and VEGF-negative patients (29 vs. 34 months, P = 0.8). Median MVD was 15, ranging from 1 to 89 microvessels per three “hot spots”. There was significant correlation between MVD and histological grade, the extent of bone marrow infiltration, and proliferative activity. Significant difference was observed regarding the overall survival between patients with low MVD (<15) and patients with high MVD (≥15) (46 vs. 22 months, P = 0.009; univariate analysis). The results of this study did not reveal clinical significance of VEGF overexpression in multiple myeloma. On the contrary, the extent of bone marrow angiogenesis is an indicator of biological potency of malignant clone and a predictor of poor survival in newly diagnosed myeloma.     

骨髓微转移在胃癌中的意义及其与VEGF关系的初步探讨

目的:探讨骨髓微转移在胃癌中的意义,探讨骨髓微转移与VEGF之间的关系.方法:采用免疫组化SABC方法检测骨髓中的肿瘤细胞,ELISA方法检测血清VEGF表达.结果:骨髓微转移阳性胃癌患者较阴性患者肿瘤浸润深,腹腔播散及肝脏转移发生率高(P＜0.05).骨髓微转移阳性和阴性患者VEGF阳性率分别为77.8%(2l/27),43.4%(23/53)(P＜0.05).结论:骨髓微转移与胃癌临床生物学行为关系密切,与VEGF表达水平相关,对胃癌的治疗和预后有着指导性的意义.     

组织因子在多发性骨髓瘤中的表达及其与血管新生的关系

 目的　研究多发性骨髓瘤（MM）患者骨髓组织中组织因子（TF）的表达及其与血管内皮生长因子（VEGF）和骨髓血管新生程度的关系。方法　采用免疫组织化学法对试验组32例初治／复发的MM患者、对照组32例缺铁性贫血患者和健康者骨髓组织的TF、VEGF表达水平和微血管密度（MVD）进行测定。结果　试验组与对照组的TF、VEGF阳性率分别为88 %、78 %;60 %、10 %。试验组与对照组TF、VEGF中位表达水平分别为（++） 、（++）;（-）、（-）;试验组与对照组中位MVD分别为4、0。试验组TF表达水平与血管新生程度等级相关性分析结果显示TF表达水平与血管新生程度呈等级正相关（rs＝0.568,P＜0.001）。结论　MM患者骨髓组织中的TF表达水平与VEGF表达水平高于对照组,与血管新生程度呈等级正相关。     

The expression pattern of CD56 (N-CAM) in human bone marrow biopsies infiltrated by acute leukemia

In hematological neoplasms CD56 (N-CAM) is expressed by T/natural killer (NK) cell lymphoma, by most neoplastic plasma cells in multiple myeloma and also in a subset of acute myelogenous leukemias (AML). In the latter, it is an indicator of poor clinical outcome. Most of the data on CD56 expression in acute leukemia have been obtained by flow cytometric analysis. Up to now, no systematic analysis of the expression pattern of CD56 in formalin fixed paraffin embedded bone marrow biopsies of acute leukemias has been performed. We immunohistochemically studied the expression of CD56 in a series of 141 bone marrow biopsies fixed in Sublimat Mercury II Chloride (SUSA) including 100 cases of AML FAB M0-M7, 11 cases of AML not further specified, 3 cases of biphenotypical leukemia, 20 cases of acute lymphoblastic leukemia (ALL) and 7 cases of reactive bone marrow biopsies. Overall, 14 of 134 (10%) leukemia cases were positive for CD56. Detail analysis revealed positivity in 5/13 cases of AML M5 (38%), 3/9 AML M1 (33%), 1/8 AML M0 (13%), 1/11 AML not specified (9%), 2/31 AML M2 (7%) and 2/26 AML M4 (8%). All cases of ALL and biphenotypic leukemias were CD56 negative. The CD56 expression in AML M5 was statistically significant (p=0.003). On paraffin embedded bone marrow biopsies CD56 expression occurs in de novo AML with an overall frequency of 13%. It is significantly correlated with AML M5, which is positive in 38% of the cases. Cases of ALL are consistently CD56 negative.     

脑星形细胞瘤中p53和VEGF的表达及其与肿瘤血管形成的关系

目的探讨p53、血管内皮生长因子(vascularendothelial growth     

p53 基因突变及血管内皮生长因子表达与大肠癌肝转移的关系

 目的　探讨 p53基因突变及血管内皮生长因子 (VEGF)表达与大肠癌肝转移的关系。方法　采用 PCR- SSCP及 DNA测序方法检测大肠癌原发灶、癌旁肠粘膜及肝转移灶组织 p53基因突变。用 RT- PCR方法检测 VEGF表达。结果　 64例大肠癌原发灶、癌旁肠粘膜、肝转移灶中p53基因突变率分别为 65.6%、9.1 %、87.1 %。肝转移组与无肝转移组原发灶的 p53突变率分别为87.1 %、45.5% ,肝转移组原发灶中 p53突变率较高 (P<0 .0 5)。在癌原发灶、癌旁肠粘膜、肝转移灶中 VEGF表达阳性率分别为 46.9%、7.8%、1 0 0 %。肝转移灶中 VEGF表达阳性率高于其它组织 (P<0 .0 5)。在肝转移组原发灶和肝转移灶中 p53突变和 VEGF表达均为阳性的检出率也较高。结论　 p53基因突变和 VEGF增强表达与大肠癌肝转移的发生有密切关系。