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1.
目的:研究抑癌基因P53及其表达产物P53蛋白在肾上腺嗜铬细胞瘤中的表达,比较P53mRNA表达与P53蛋白表达的关系。方法:应用免疫组织化学及核酸分子原位杂交方法检测P53基因及其产物的表达情况。结果:原位杂交显示,P53mRNA在肾上腺嗜铬细胞瘤中表达为24.0%,在恶性肾上腺嗜铬细胞瘤中为14.0%;免疫组织化学显示,P53蛋白在肾上腺嗜铬细胞癌中表达为79.3%,在恶性肾上腺嗜铬细胞瘤中为  相似文献   

2.
为观察P53基因蛋白在胸腺癌中的表达及其与肿瘤临床病量学特征和预后的关系。采用SP免疫组织化学方法观察P53基因蛋白在54例胸腺瘤组织中表达情况。结果显示:18便侵袭型胸腺瘤中11例P53蛋白阳性(61.1%),36例非侵袭型胸腺中瘤中7例P53蛋白阳性(19.4%,P〈0.05);单纯性蝇12例P53蛋白一(25.0%),胸腺类癌2例和胸腺癌4例,P53蛋白均阳性(P〉0.05);有重症肌无力(  相似文献   

3.
为了明确P53基因突变与肾癌发生发展的关系,采用Northernblot方法和免疫组织化学方法对37例肾癌新鲜标本进行P53基因检测。结果显示:7例P53mRNA表达明显高于正常对照,9例(24.3%)P53蛋白过表达;37例肾癌组织中3例为肉瘤样肾细胞癌或组织中含肉瘤样癌细胞成分,此3例(100.0%)均有P53mRNA和P53蛋白过表达,都有肾门或腹膜后淋巴结转移;34例透明细胞和颗粒细胞癌中4例(11.8%)P53mRNA高表达,6例(17.6%)P53蛋白过表达,其中1例有肾静脉癌栓,1例有肾门淋巴结转移,另1例取自切口转移癌组织。结果表明:肉瘤样肾细胞癌中有频繁的P53基因突变,可能是肾癌细胞向肉瘤样癌细胞转化的关键因素之一。  相似文献   

4.
嗜铬细胞瘤超微结构和P21、P53蛋白过量表达的研究邓耀良陈坚作者单位:530027广西医科大学附属第一医院泌尿外科为探索嗜铬细胞瘤的生物学特征与临床的关系,我们对14例嗜铬细胞瘤超微结构,rasP21和P53表达的情况进行了初步探讨。材料及方法本组...  相似文献   

5.
目的研究手术切除小细胞肺癌(SCLC)P53蛋白表达,探讨其临床意义。方法取根治术后>5年,术前未放疗、化疗标本32例;石蜡切片,ABC染色。结果P53蛋白表达总阳性率81.3%(26/32);P53蛋白表达与性别、吸烟、PTNM分期、淋巴结转移、原发病灶大小相关不显著(P>0.05)。术后2年内死亡组P53阳性率100%(14/14),>5年死亡组42.9%(3/7)(P<0.01)。前者死亡风险比后者高2倍。脑转移者P53阳性率85.7%(6/7)。结论P53蛋白在SCLC中有高表达,它与SCLC术后的近期死亡及脑转移有关,对判断预后有帮助  相似文献   

6.
前列腺癌中P53和bcl-2蛋白的表达及意义   总被引:1,自引:1,他引:0  
应用免疫组化LSAB法,检测15例良性前列腺增生症(BPH)和35例前列腺癌(Pca)组织中P53、bcl-2蛋白的表达水平。结果发现:(1)BPH组与Pca组中P53、bcl-2蛋白的阳性表达率分别为6.7%、13.3%和34.3%、42.9%,显示Pca组P53、bcl-2蛋白阳性率明显高于BPH组(分别P〈0.05、P〈0.05)。(2)Pca组中P53蛋白阳性12例,其中Ⅰ、Ⅱ级肿瘤阳性5  相似文献   

7.
mdm2基因和P53基因在膀胱癌中预后的价值   总被引:3,自引:1,他引:2  
用mdm2基因单抗SMP14和抗P53基因单抗DO-7对70例原发性膀胱移行细胞癌(TCC)标本进行免疫组织化学(IHC-ABC)检测。结果mdm2基因蛋白核染色阳性表达率为44.29%(31/70)与肿瘤的分级,分期有关,而与肿瘤的生长方式无关,且复发或转移率较低(P〈0.05),P53基因蛋白总阳性表达率为45.71%(32/70),其中G3和T2-4肿瘤的P53基因蛋白阳性表达率较高(P〈0  相似文献   

8.
食管、贲门癌组织中P53基因蛋白过度表达及其生物学意义   总被引:1,自引:0,他引:1  
目的研究食管癌、贲门癌组织中P53基因蛋白表达情况及其意义。方法采用免疫组织化学ABC法检测了60例食管癌、贲门癌组织中P53基因蛋白表达情况,并结合肿瘤的某些病理特点如分化程度、TNM分期等进行了分析。结果P53基因蛋白过度表达的阳性率高分化组(75%)与中(96.9%)、低(100%)分化组之间差异显著(P<0.01)。食管癌,Ⅱ期与Ⅲ期的P53基因蛋白过度表达的阳性率分别为95.7%和92.3%;贲门癌,Ⅰ期、Ⅱ期、Ⅲ期阳性率分别为66.7%、100%和93.3%,经检验,食管癌、贲门癌组织中P53基因蛋白过度表达与肿瘤TNM分期之间无差异(P>0.05)。结论随着肿瘤分化程度的降低,P53基因蛋白过度表达的阳性率将增高,P53基因蛋白有可能成为判断食管癌、贲门癌恶性程度的指标之一;p53基因突变及P53基因蛋白过度表达不仅出现在食管癌、贲门癌发生、发展的晚期阶段,而在早期阶段就已存在并起作用。  相似文献   

9.
大肠癌中p53蛋白异常表达与细胞增殖和浸润转移的关系   总被引:2,自引:0,他引:2  
应用LSAB免疫组织化学方法检测了74例大肠癌中P53,PCNA和Ⅳ型胶原的表达情况,并探讨P53蛋白的表达与肿瘤细胞增殖和浸润转移的关系。结果显示大肠癌P53,PCNA的阳性率分别为52.7%,81.1%,P53,PCNA过表达与浸润程度以及淋巴结转移有关,提示P53过表达在浸润转移过程及细胞增殖中的均起重要作用。  相似文献   

10.
目的 探讨WAF1/CIP1、p53基因在食管癌发生中的调控作用及其机制。方法 采用SABC免疫组织化学方法对46例食管鳞状细胞癌标本进行WAF1/CIP1及p53蛋白检测,并对两者表达关系进行分析。结果 WAF1/CIP1表达阳性率与食癌细胞分化程度呈正相关(P〈0.05),绝大多数突变型p53阴性组织中WAF1/CIP1蛋白表达阳性,绝大多数WAF1/CIP1蛋白阴性组织突变型p53阳性(P  相似文献   

11.
INTRODUCTION: Extracellular matrix (ECM) degradation is an essential step that allows tumor cells to penetrate a tissue barrier and become metastatic. Heparanase-1 (HPR) is an endoglycosidase that specifically degrades heparan sulfate proteoglycans, a chief component of the ECM. Previous studies have demonstrated HPR expression in various malignancies and that there is differential HPR expression between benign and malignant tumors. Currently, there is no technique that can reliably predict the malignant behavior of some pheochromocytomas. This study tests whether HPR is differentially expressed in malignant and benign pheochromocytomas. METHODS: Paraffin-embedded specimens from 29 pheochromocytomas were evaluated. The tissues were collected from surgical specimens over a 10-year period from 26 patients (8 males, 18 females) with a mean age of 47 years (range 19-78 years, median 47 years). One female patient underwent 3 separate operations for malignant pheochromocytoma and thus provided 3 specimens. Another female patient had both the primary tumor and a liver metastasis processed, and therefore provided 2 specimens. Patient charts and pathology reports were reviewed to classify the pheochromocytomas as either benign or malignant. Based on clinical behavior and/or pathological evidence of metastasis or invasion into surrounding tissues, 10 specimens were malignant and 19 had benign behavior. As a control, normal adrenal tissue from 3 nephrectomy specimens was included in the study, as was tissue from 1 adrenocortical adenoma. All 33 specimens were tested for HPR gene expression by in situ hybridization (ISH) with an antisense RNA probe and immunohistochemistry (IHC) with an anti-HPR antibody. Statistical analysis was done using the chi(2) test of proportions to determine if HPR expression correlated with malignancy using ISH, IHC, or both tests together. RESULTS: Using ISH, the percentage of HPR expression in the malignant pheochromocytomas was 50% while HPR expression in the benign tumors was 21% (P = 0.11). Using IHC, the percentage of HPR expression in the malignant pheochromocytomas was 80% while HPR expression in the benign tumors was 32% (P = 0.01). Considering both tests cumulatively, all 10 malignant pheochromocytomas stained positive for HPR by ISH and IHC, while only 37% of the benign tumors were positive for HPR expression (P = 0.001). The one adrenal adenoma and the 3 normal adrenal glands processed stained negative for HPR expression by both ISH and IHC. CONCLUSIONS: HPR expression is higher in malignant pheochromocytomas than in benign pheochromocytomas or normal tissue. HPR may contribute to the invasive characteristics of malignant pheochromocytomas and might be used as a marker to distinguish malignant from benign pheochromocytomas. HPR expression might also be used as a prognostic tool in guiding long-term patient follow-up.  相似文献   

12.
目的: 探讨Survivin基因在原发性胆囊癌(PGC)中的表达情况,以及与P53,PCNA蛋白表达的相互关系.方法: 逆转录聚合酶链反应(RT-PCR)法检测9例PGC新鲜癌组织Survivin mRNA表达,对38例PGC石蜡包埋组织应用免疫组织化学法检测Survivin,P53和PCNA蛋白的表达,并将结果进行相关分析.结果: 9例PGC新鲜癌组织中3例有Survivin mRNA表达.21例(55.2%)PGC Survivin蛋白表达阳性,而12例胆囊腺瘤中有2例表达,20例癌旁正常组织中则无表达.PGC Survivin蛋白表达阳性率显著高于胆囊良性病变和正常胆囊组织(P<0.01).Survivin蛋白在PGC中的表达与PCNA指数相关,与P53蛋白表达、PGC病理分级和Neiv分期无显著相关.结论: Survivin基因在PGC中存在高表达,Survivin基因表达上调通过不同的机制影响PGC细胞的凋亡和增殖,在PGC发生、发展过程中起作用.  相似文献   

13.
前列腺癌中P53的表达及其临床意义   总被引:4,自引:3,他引:1  
目的:探讨P53在前列腺癌中的表达及其临床意义。方法:应用免疫组化Elivision法,检测45例前列腺癌和10例前列腺增生组织标本P53的表达,分析P53表达与前列腺癌分期、分级、前列腺特异性抗原(PSA)水平、内分泌治疗效果及预后的关系。结果:P53在前列腺癌和前列腺增生中阳性表达率分别为51.1%和10.0%(P<0.05);D期和A~C期前列腺癌中阳性表达率分别为70.0%和25.0%(P<0.05);Gleason评分≤7分和>7分前列腺癌中阳性表达率分别为14.3%和56.7%(P<0.05);PSA≤10μg/L和>10μg/L前列腺癌中阳性表达率分别为20.0%和60.0%(P>0.05);在内分泌治疗有效和无效前列腺癌中阳性表达率分别为25.0%和72.3%(P<0.05);LogRank检验分析P53阴性表达前列腺癌患者的生存时间明显长于P53阳性表达前列腺癌患者(P<0.05)。结论:P53表达可以作为判定前列腺癌预后的分子标记,同时可以预测内分泌治疗的效果。  相似文献   

14.
目的探讨P53的表达在不同类型胸腺瘤中的意义。方法选取我科2000年5月至2005年12月29例经病理证实的胸腺瘤手术切除标本,采用SP免疫组化方法检测P53蛋白在胸腺瘤中的表达情况。结果P53阳性表达率分别为:良性胸腺瘤7.70%,恶性胸腺瘤I型50.00%,胸腺癌100%。P53的表达随着肿瘤恶性程度的增高而增加(P<0.05)。P53蛋白表达的阳性率与胸腺组织学类型及是否伴有重症肌无力(MG)无关(P>0.05)。结论P53的表达在不同类型胸腺瘤中差异显著,对于判断胸腺瘤良恶性有重要参考价值。  相似文献   

15.
16.
Pheochromocytomas: can malignant potential be predicted?   总被引:11,自引:0,他引:11  
John H  Ziegler WH  Hauri D  Jaeger P 《Urology》1999,53(4):679-683
OBJECTIVES: The presence of metastatic lesions is the only acceptable fact to confirm malignant pheochromocytoma. Patients with malignant pheochromocytomas, however, have a very poor survival rate. The aim of our study was to postulate predictive values for malignant pheochromocytomas. METHODS: We evaluated symptoms, diagnostic modalities, treatment, and long-term follow-up of 86 patients with 85 benign and 10 malignant pheochromocytomas. Parameters from the benign were compared with those of the malignant pheochromocytomas. RESULTS: Preoperative 24-hour urinary dopamine was in the normal range for benign pheochromocytomas but increased in malignant pheochromocytomas (P<0.0001). Vanillylmandelic acid was elevated in both benign and malignant pheochromocytomas but higher in malignant than in benign tumors (P = 0.01). No differences could be shown in urinary epinephrine and norepinephrine samplings. Tumor location was divided into 77 adrenal (81%) and 18 extra-adrenal (19%) sites. Malignant pheochromocytomas were located more often at extra-adrenal sites (P = 0.03). There was no increased incidence of malignancy in patients with familial bilateral pheochromocytomas or multiple endocrine neoplasia. Tumors greater than 80 g in weight corresponded to malignancy (P<0.0001). Dopamine tumor concentration was higher in malignant than in benign pheochromocytomas (P = 0.01). Persistent arterial hypertension occurred in 9 (13%) of 72 benign and 6 (60%) of 10 malignant pheochromocytomas (P = 0.001). The 10-year survival rate was 94% for benign pheochromocytomas. All patients with malignant pheochromocytomas died within this period (P = 0.0001). CONCLUSIONS: High preoperative 24-hour urinary dopamine levels, extra-adrenal tumor location, high tumor weight, elevated tumor dopamine concentration, and postoperative persistent arterial hypertension are all factors that increase the likelihood of malignant pheochromocytoma. Patients with these characteristics should have more frequent follow-up evaluations to identify malignancy at earlier states.  相似文献   

17.
嗜铬细胞瘤临床诊治   总被引:16,自引:1,他引:15  
Zhu Y  Wu Y  Liu D  Sun F 《中华外科杂志》2000,38(11):852-854
目的 提高嗜铬细胞瘤的诊治水平。方法 总结1958年至1998年间经手术和病理证实的嗜铬细胞瘤286例。结果 本组220例患者肿瘤位于肾上腺,66例位于肾上腺外。在29例恶性嗜铬细胞瘤中,7例位于肾上腺,22例位于肾上腺外。19例为静止型嗜铬细胞瘤。手术切除肿瘤281例。结论 对潜在的儿茶酚胺性心肌病的防治可降低手术死亡率。恶性嗜铬细胞瘤的诊断要靠长期严密的随访。  相似文献   

18.
目的探讨结直肠癌中P53和K-ras基因突变与血管内皮生长因子(VEGF)的关系。方法采用RT-PCR技术和聚合酶链式反应-单链构像多态性分析(PCR-SSCP)方法,对46例结直肠癌的新鲜癌组织进行P53、K-ras基因突变率和VEGF表达率的检测。结果46例结直肠癌中VEGF表达阳性率为52.2%(24/46),P53基因突变率为63.0%(29/46),K-ras基因突变率为43.4%(20/46)。P53基因突变的29例中VEGF表达阳性20例,占68.9%,表达阴性9例,占31.0%,P<0.05。K-ras基因突变的20例中VEGF表达阳性14例,占70.0%,表达阴性6例,占30%,P<0.05。结论结直肠癌组织中P53基因突变和K-ras基因突变与VEGF表达呈正相关,此点为临床基因治疗肿瘤提供了重要理论依据。  相似文献   

19.
目的:提高对前列腺良、恶性病变的临床认识和鉴别诊断水平。方法:用免疫组化染色法分别对前列腺腺癌13例、前列腺上皮内瘤和不典型腺瘤样增生22例、良性前列腺增生74例患者病变组织作抗高分子质量细胞角蛋白抗体(CK34BE12)、前列腺特异性抗原(PSA)及突变型P53的表达。结果:9例前列腺癌的腺体基底细胞区CK34BE12染色为阴性;4例染色大部分区域呈现阴性,染色区域部分腺体CK34BE12的染色呈现断续的阳性反应,PSA表达阴性,P53表达呈阳性,阳性细胞标记指数>15%。13例前列腺上皮内瘤和不典型腺瘤样增生腺体基底细胞区CK34BE12染色呈阳性,9例基底细胞区CK34BE12染色呈现断续阳性的区域占主体,染色小部分区域呈现阴性,染色区域PSA表达减弱,P53表达呈阳性,阳性细胞标记指数<15%。74例良性前列腺增生的腺体基底细胞对CK34BE12染色均呈强阳性,染色的反应带呈现不规则粗线形连续环状强阳性着色围绕在腺周,染色区域中PSA表达呈现阳性,P53表达呈阴性。结论:在组织形态学观察的基础上联合应用CK34BE12及PSA标记物可特异地显示前列腺腺体基底细胞的存在及间接了解其基底细胞层的完整性与否,结合P53的表达判断致癌基因的存在;对前列腺良、恶性病变的鉴别诊断及肿瘤恶性程度的准确判断具有很大帮助,且对前列腺癌的早期诊断也有很好的应用价值。  相似文献   

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