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1.
目的:探索广西肝癌高发区肝细胞癌(HCC)的组织中检测p53蛋白的表达情况.方法:用免疫组织化学方法对30例肝细胞癌(HCC)和癌旁组织进行检测.p53蛋白的免疫组化染色一抗用的是兔抗.连续切片染色乙型肝炎表面抗原和核心抗原.结果:30例肝细胞癌组织中有13例(13/30,43.3%)p53蛋白表达阳性;在≤5.0cm的肝细胞癌组织中有25%(1/4)的p53蛋白表达阳性;在>10.0cm的肝细胞癌组织中有71.4%(5/7)的p53蛋白表达阳性.p53蛋白阳性在中、低分化肝细胞癌中的表达高于在高分化肝细胞癌组织中,而且大多数在年轻患者的肝细胞癌组织中.结论:本组资料表明,p53蛋白表达与肿瘤的大小、分级和患者的年龄有着密切的关系.30例中有27例(90.0%)证实为HBV感染,表明p53蛋白表达与性别和HBV感染、肝硬化及AFP水平无密切相关关系.  相似文献   

2.
 应用LSAB免疫组化方法检测73例原发性肝细胞癌(HCC))及其癌旁组织中P53蛋白的异常表达。 结果显示:P53蛋白在HCC中阳性表达率显著高于癌旁组织, 且与HCC分化程度呈显著正相关,低分化组P53蛋白阳性表达率显著高于高分化组(P<0.05); 癌旁组织中, p53蛋白表达仅见于增生结节中, 肝硬化组织内未见p53蛋白阳性表达。 提示P53基因突变是HCC的频发事件, 在HCC的发生发展中发挥重要作用; 增生结节是HCC的癌前病变。  相似文献   

3.
肝细胞癌临床病理学特征与p53蛋白表达的关系   总被引:7,自引:0,他引:7  
应用免疫组织化学技术检测29例肝细胞癌(肝癌)和23例肝硬化标本中突变型p53蛋白的表达,并探讨后者与肝癌临床病理学特征之间的关系。结果:肝癌突变型p53蛋白表达阳性率为70%(20/29),癌旁组织阳性率为60%(18/29),肝硬化组织阳性率为30%(7/23),有血管侵犯的12例肝癌变变型p53蛋白表达均为阳性,而无血管侵犯的17例中仅8例为阳性(P<0.05);突变型p53蛋白阳性组血清甲胎蛋白(AFP)明显高于阴性组(8370±4764ng/ml比98.7±64.3ng/ml,P<0.05)。提示:P53蛋白表达在肝硬化时即发生了异常;p53蛋白异常可能是AFP基因被激活的原因之一;p53蛋白异常有利于肝癌向门静脉转移。  相似文献   

4.
本文应用PCNA和p53抑癌基因蛋白的免疫络化方法,对11例胆囊上皮良性病变和33例胆囊癌进行了研究,结果发现胆囊良性病变和胆囊癌的平均PCNA指数分别为:良性病变为24.1%(n=11.x±24.6),高分化癌为48.0%(n=13,x±12.8),中分化癌为49.5%(n=11,x±15.4).低分化癌为76.4%(n=9,x±18.1);高分化胆囊癌平均PCNA指数明显高于良性病变(P<0.05);低分化癌的平均PCNA指数明显高于高分化癌(P<0.05);11例胆囊上皮良性病变均无p53蛋白阳性表达;33例胆囊癌p53阳性表达12例(36.4%),高分化癌p53阳性率为15.4%(2/13).中分化癌45.5%(5/11).低分化癌55.6%(5/9):各组阳性率比较无显著性差异(P>0.05);PCNA指数≥50%的胆囊癌其p53蛋白阳性率明显高于PCNA指数<50%的胆囊癌(P<0.05)。结果提示:PCNA指数与胆囊癌的分化程度有关.PCNA及p53蛋白的免疫组化染色对胆囊上皮良、恶性病变的鉴别论断有帮助。本文还就胆囊癌p53蛋白表达与PCNA指数的关系进行了讨论。  相似文献   

5.
目的:了解胰腺癌旁组织p21与p53蛋白的表达与胰腺癌多中心性的机制。方法:采用免疫组化法对42例胰腺导管怎、相应的27例胰腺癌分组织和对照的12例正常胰腺组织石蜡包理标本进行p21和p53蛋白单抗的免疫级化染色。结果:42例胰腺癌组织中呈p21和p53蛋白阳性染色分别为24例(67%)和20例(48%)。27例癌分组织呈阳性染色则分别为13例(48%)和11例(41%),染色细胞呈灶性分布.其相应的癌组织也为阳性。对照组12例正常胰腺组织呈p21阳性染色仅1例,而无1例呈p53阳性染色,与胰腺癌和癌旁组织p21或p53阳性车间均有显著差异(P<0.01)。结论:胰腺癌分组织中某些细胞呈p21或p53阳性染色,这些细胞可能较易发生癌变,使胰腺癌呈多中心性发生。  相似文献   

6.
 【摘要】 目的 探讨p53和p21WAF1蛋白在肝细胞肝癌(HCC)中的表达及其意义。方法 应用免疫组织化学SP法检测41例HCC及相应30例癌旁肝组织中p53和p21WAF1蛋白的表达。结果 p53和p21WAF1蛋白在HCC中阳性表达率分别为43.9 %和75.6 %,明显高于癌旁组织,差异有统计学意义(P<0.01)。HCC中p53蛋白表达与p21WAF1蛋白表达无明显相关性(P>0.05)。p53蛋白表达在不同组织学分级、有无肝内或门静脉转移之间差异有统计学意义,而p21WAF1蛋白表达在不同临床病理特征间差异无统计学意义。结论 p53和p21WAF1蛋白高表达均在HCC发生、发展中起作用,但两者间并无相关性。p21WAF1的诱导存在着不依赖p53的途径。  相似文献   

7.
目的:探讨Pokemon和p53蛋白在人肝细胞癌组织中的表达,分析其与肝细胞癌转移复发的关系。方法:应用免疫组织化学法检测60例肝细胞癌组织和癌旁组织中Pokemon和p53蛋白的表达情况。结果:60例肝细胞癌组织中Pokemon和p53表达率显著高于癌旁组织(P〈0.05)。Pokemon的表达与临床分期、肿瘤直径、肿瘤分化程度密切相关(P〈0.05);p53的表达与脉管癌栓、术后复发、肝外转移及肿瘤分化程度密切相关(P〈0.05)。Pokemon和p53的表达呈显著正相关(γ=-0.275,P=0.033)。结论:Pokemon和p53蛋白的高表达可能在肝细胞癌的发生及进展中起着重要作用。  相似文献   

8.
梁君林  周永淳  陈利生 《肿瘤》2006,26(10):924-926
目的:探讨p33^ING1、p53在结直肠癌中的表达及其相互关系。方法:应用免疫组化SP法检测60例结直肠癌组织及相应正常黏膜组织中p33^ING1、p53的表达。结果:结直肠癌组织、相应正常黏膜组织中p33^ING1蛋白的阳性表达率分别为43.3%(26/60)、100%(60/60)(P〈O.01),p53蛋白分别为51.6%(31/60)、0%(0/60)。p33^ING1在无淋巴结转移组及淋巴结转移组癌组织中的阳性表达率分别为57.6%(19/33)、25.9%(7/27)(P〈0.05);在DukesA、B期、Dukes C、D期病例中分别为56.7%(17/30)、30.0%(9/30)(P〈0.05)。在p53表达阴性的29例中有12例(41.4%,12/29)p33^ING1表达缺失,而p53阳性的31例病例中有22例(71.0%,22/31)p33^ING1表达阴性(P〈0.05),在p53蛋白表达阳性的病例中p33^ING1蛋白表达明显缺失,两者表达呈负相关。结论:p33^ING1在结直肠癌组织中低表达,与p53互相协同,在结直肠癌的发生、发展中可能起重要作用。  相似文献   

9.
目的:探讨大肠癌的发生与组织学的类型及分化程度的关系。方法:用免疫组织化学及常规病理学方法检测55例大肠癌中抑癌基因p53蛋白的过度表达。结果:p53蛋白的过度表达在大肠癌中为8%,而在正常组织及良性肿瘤中为无表达,按Turbull分期,不同分期大肠癌中p53蛋白过度表达阳性率不同,早期癌(Ⅰ-Ⅱ期)中为32.1%。(9/28),晚期癌(Ⅲ-Ⅳ期)中为48.1%(13/27)(P<0.015),p53蛋白过度表达在不同组织类型中阳性率不同,如粘液腺癌为41.6%,明显低于管状腺癌的66.6%和乳头状腺癌的53.3%的阳性率。其粘液腺癌与管状腺癌的差异显(P<0.05),p53蛋白的过度表达在不同分化程度的大肠癌中阳性率亦不同,高分化癌为37.5%;而低分化癌为75.4%,(P<0.05)。结论:p53蛋白过度表达可能发生于大肠癌病理过程的晚期阶段,可作为大肠癌有参考价值的预后指标之一。  相似文献   

10.
目的探讨p53蛋白表达和肿瘤微血管生成与肝细胞癌(HCC)发展及预后的关系.方法采用免疫组化方法检测50例肝细胞癌组织中p53蛋白的表达,并用抗CD34抗体标记癌组织血管内皮细胞,计算肿瘤微血管密度(microvessl density,MVD).分析p53蛋白和MVD与HCC临床病理学特征之间的关系.结果 p53阳性表达为癌细胞核棕黄色着色,CD34染色定位在血管内皮细胞上,HCC的p53表达及MVD与肿瘤大小、病灶数目、病理分级、门静脉癌栓形成、包膜是否完整显著相关(P<0.05).p53蛋白表达阳性者MVD值显著高于阴性者(P<0.05);p53蛋白表达阳性或MVD≥148的肝癌患者术后生存时间比p53蛋白表达阴性或MVD<148者短(P<0.05).结论 p53与肿瘤血管生成密切相关,p53蛋白及MVD可作为肝癌预后判断的一个重要指标.  相似文献   

11.
杨子楠  魏继武 《肿瘤》2011,31(6):565-569
外泌体是细胞经过"内吞-融合-外排"等一系列调控过程而形成的细胞外纳米级小囊泡。外泌体可以携带蛋白,运送RNA,在细胞间物质和信息转导中起重要作用。外泌体可能通过调控免疫功能,促进肿瘤血管新生和肿瘤转移,以及直接作用于肿瘤细胞等途径,影响肿瘤的进展。外泌体可应用于肿瘤的诊断。本文总结了近年来有关外泌体在肿瘤发展中作用的研究进展。  相似文献   

12.
The aim of the present study was to test the ability of the chemotherapeutic agent suramin to inhibit angiogenesis in experimental models in vitro and in vivo. In the culture of rat aortic rings on fibronectin, suramin dose-dependently inhibited vascular cell growth, achieving the maximal effect (mean − 88% versus controls, P < 0.05) at 400 μg/ml. Image analysis showed that suramin could inhibit microvessel sprouting in fibrin from rat aortic rings as evaluated by the ratio between the cellular area and the mean gray value of the sample (sprouting index); suramin at 50 μg/ml significantly reduced the sprouting index from the control value of 0.35 ± 0.04 to 0.14 ± 0.02 mm2/gray level (P < 0.05). Likewise, the area occupied by cells was 19.2 ± 1.8 mm2 as compared with 41.8 ± 4.2 mm2 in controls (P < 0.05). In the rat model of neovascularization induced in the cornea by chemical injury, suramin at 1.6 mg/eye per day reduced the length of blood vessels (0.7 ± 0.1 mm as compared with 1.5 ± 0.1 mm in controls, P < 0.05). In the same model the ratio between the area of blood vessels and the total area of the cornea (area fraction score) was decreased by suramin from 0.19 ± 0.02 in controls to 0.03 ± 0.003 (P < 0.05). Suramin given i.p. at 30 mg/kg per day markedly inhibited the neovascularization induced in the rat mesentery by compound 48/80 or conditioned medium from cells secreting the angiogenic protein fibroblast growth factor-3 (FGF-3). The area fraction score in control rats treated with compound 48/80 was 0.31 ± 0.03, and this was reduced to 0.07 ± 0.01 by suramin (P < 0.05). After i.p. administration of FGF-3 the area fraction score was reduced by suramin from 0.29 ± 0.03 to 0.05 ± 0.01 (P < 0.05). These results provide evidence that suramin exerts inhibitory effects on angiogenesis in both in vitro and in vivo models. Received: 9 January 1998 / Accepted: 29 June 1998  相似文献   

13.
重组人血管内皮抑制素(恩度)是一种广谱的抗血管生成分子靶向药物,主要循证证据为联合化疗治疗晚期非小细胞肺癌(NSCLC).近年来,重组人血管内皮抑制素用于治疗多种恶性肿瘤的研究逐渐增多,并取得了较好的疗效.此外,有关重组人血管内皮抑制素联合治疗手段、给药途径、给药方法的研究逐渐开展,有利于其合理应用.  相似文献   

14.
We studied the influence of surgical trauma to the iliac bone on the implantation of I. V. injected tumor cells, which formed tumor in the surgical wounds of 27/84 mice (32%). None of these mice or nonsurgical mice developed tumor in the opposite or uninjured pelvic bone (P < 0.0001). When different numbers (105, 5 × 105, and 10 × 105) of TA3Ha cells were injected I. V. immediately after surgery, the frequency of tumor formation showed an increase (respectively, 32%, 63%, 71%). As the interval between induction of trauma and tumor cell injection was increased from 0 to 15 days, the frequency of tumor formation declined from 32% to 0%. These results suggest that the healing wound is a privileged site for experimental metastasis, particularly in the early stages. It is likely that the proteins in the blood clotting cascade are involved in local tumor implantation. © 1994 Wiley-Liss, Inc.  相似文献   

15.
微RNA(microRNA,miR)可在转录后水平负调控靶基因表达,miR异常表达与肿瘤生成密切相关.对胶质瘤中多个miR异常表达及其机制的研究将对进一步探讨胶质瘤的分子病理及其诊治开拓新途径.  相似文献   

16.
Aims  We evaluated both in vitro and in vivo antitumoral properties of an isolated compound from Wilbrandia ebracteata, dihydrocucurbitacin-B (DHCB), using B16F10 cells (murine melanoma). Materials and methods  We made use of MTT and 3H-Thymidine assays to investigate the cell viability and cell proliferation, flow cytometry analysis to monitor cell cycle and apoptosis, western blot analysis to evaluate the expression of cell cycle proteins, imunofluorescence analysis and in vivo tumor growth and metastasis. Results  Dihydrocucurbitacin-B significantly reduced cell proliferation without important effects on cells viability. DHCB lead cells to accumulate in G2/M phases accompanied by the appearance of polyploid cells, confirmed by fluorescence assays that demonstrated a remarkable alteration in the cell cytoskeleton and formation of binuclear cells. Annexin-V-FITC incorporation demonstrated that DHCB did not induce apoptosis. About 10 μg/mL DHCB was found to decrease cyclin-A, and especially in cyclin-B1. The in vivo experiments showed that DHCB treatment (once a day up to 12 days; p.o.) was able to reduce the tumor growth and lung metastasis up to 83.5 and 50.3%, respectively. Conclusions  Dihydrocucurbitacin-B reduces cell proliferation due to a decrease in the expression of cyclins, mainly cyclin-B1 and disruption of the actin cytoskeleton, arresting B16F10 cells in G2/M phase. Taken together, the in vitro and in vivo experiments suggest that DHCB was effective against cancer, however, it remains to be proved if DHCB will be a good candidate for drug development.  相似文献   

17.
生活质量(qualityoflife,QOL)又译作生命质量、生存质量,它是在世界卫生组织提倡的健康新概念“人们在躯体上、精神上及社会生活中处于一种完好的状态,而不仅仅是没有患病和衰弱”的基础上构建的,是医学模式由生物医学模式向生物一心理一社会医学模式转变的体现。西方发达国家已将此概念广泛应用于临床试验、卫生政策制定和卫生资源效益评价等众多领域。生存质量已作为评价肿瘤患者术后状况的首选指标。  相似文献   

18.
19.
Objective The aim of this study was to investigate the changes in dietary preferences in cancer patients in China and to determine the need for encouraging the adherence to a sensible diet among such patients.Methods A total of 468 cancer patients were interviewed using a self-designed questionnaire focusing on changes in the intake of specific foods. Data were analyzed using SPSS 16.0. Results Most patients completely avoided roosters and carp(73.1%), condiments(51.9%), and meat of aquatic species(40.4%). All other types of the specific foods were completely avoided by different subpopulations of the patients.Conclusion In addition to focusing on disease treatment, medical professionals need to help cancer patients overcome barriers associated with the customs of avoiding specific foods encompassed by the term ”fawu” and provide them with dietary guidance in order to prevent negative nutritional effects.  相似文献   

20.
[目的]探讨DAPK基因与新疆维吾尔族妇女宫颈病变的相关关系。[方法]选取维吾尔族妇女正常或炎症的宫颈组织30例、CINⅠ30例、CINⅡ/Ⅲ30例、宫颈鳞癌组织30例采用免疫组化SP法检测DAPK蛋白表达;为了进一步验证DAPK蛋白表达水平,采用逆转录聚合酶链反应(RT-PCR)法检测正常或炎症的宫颈组织10例、CINⅠ10例、CINⅡ/Ⅲ15例、宫颈鳞癌组织20例中mRNA的表达。[结果]DAPK的蛋白表达率在正常或炎症的宫颈组织、CINⅠ、CINⅡ/Ⅲ、宫颈鳞癌组织中分别为93.3%、83.3%、60.0%、33.3%,SCC组阳性表达率明显减少(P〈0.05);四组mRNA的表达率分别为90.0%、90.0%、46.7%、10.0%,SCC组阳性表达率明显减少(P〈0.05)。宫颈组织中DAPK在蛋白水平和mRNA水平的表达均和宫颈病变程度成负关(P〈0.05)。[结论]新疆维吾尔族妇女宫颈病变组织中DAPK蛋白和mRNA水平均随病变程度加深而减少;DAPK蛋白检测可能为宫颈癌的早期诊断提供依据。  相似文献   

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