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1.
目的:检测非小细胞肺癌(NSCLC)组织中耐药相关蛋白及增殖细胞核抗原(PCNA)、p53的表达,探讨耐药相关蛋白与PCNA、p53表达的相关性及其临床意义。方法:采用免疫组化S-P法检测70例NSCLC的PCNA、p53、P170蛋白、肺耐药相关蛋白(LRP)、拓扑异构酶Ⅱ(TopoⅡ)及谷胱甘肽S转移酶π(GST-π)的表达。结果:PCNA、p53、P170、LRP、TopoⅡ、GST-π在NSCLC中的总阳性表达率分别为75.7%、60.0%、72.9%、67.1%、27.1%、78.6%。PCNA与p53间表达存在相关性(r=0.354,P=0.003)。P170在N分期(P=0.016)及TNM分期(P=0.018)中的表达存在显著性差异。LRP在组织学分型(P=0.000)及N分期(P=0.048)中的表达存在显著性差异。GST-π与病灶大小(P=0.002)、T分期(P=0.008)及TNM分期(P=0.028)中的表达存在显著性差异。Spearman等级相关分析显示p53与P170(P=0.003)、GST-π(P=0.003)的表达呈正相关。PCNA与各耐药因子的表达之间均无相关性(P〉0.05)。结论:肺癌组织耐药相关蛋白的表达与p53蛋白表达存在明显的相关性,而与PCNA无相关性,联合检测肺癌耐药相关蛋白和p53蛋白表达对肺癌的耐药预测及预后有一定的临床意义。  相似文献   

2.
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   

3.
[目的]研究p53蛋白和增殖细胞核抗原(PCNA)的表达与非小细胞肺癌(NSCLC)放射敏感性和预后的关系。[方法]应用免疫组化法检测60例放疗前NSCLC组织中p53蛋白和PCNA的表达情况.分析其与放射敏感性和生存期的关系。[结果]60例NSCLC组织中p53和PCNA阳性表达率分别为63.3%(38/60)和96.7%(58/60),高表达者分别为22例(36.7%)和42例(70.0%)。p53和PCNA表达强度与NSCLC放射敏感性均有相关性:p53与NSCLC患者预后有关.而PCNA与其无关。同时高表达的NSCLC患者3年生存率低于同时低表达患者(20.0%vs60.0%)。[结论]p53和PCNA表达与NSCLC放射敏感性有关,p53高表汰提示预后较差.两者同时高表达的NSCLC患者预后较差。  相似文献   

4.
伴神经内分泌分化非小细胞肺癌中p53、bcl-2及c-myc的表达   总被引:7,自引:3,他引:7  
目的 研究伴神经内分泌(neuroendocrine,NE)分化的非小细胞肺癌(NSCLC)中p53、bcl-2和c-myc的特异性表达。方法 随机搜集60例手术切除的NSCLC石蜡标本,采用免疫组化S-P法检测神经元特异性烯醇化酶(NSE)、嗜铬颗粒蛋白A(CgA)、突触素(Syn)及p53,bcl-2,c-myc基因蛋白的表达。结果 NSCLC中NSE、CgA、Syn的阳性表达率分别为45.00%(27/60)、13.33%(8/60)、31.67%(19/60)。结合三者的表达确定伴有NE分化的占41.67%(25/60);NE分化与肺癌的分化程度有密切关系(P<0.05);伴神经内分泌分化非小细胞肺癌(NSCLC-NE)的转移率较高,临床分期较高。NSCLC-NE中bcl-2、p53和c-myc的阳性表达率分别为68.00%(17/25)、80.00%(20/25)和68.00%(17/25),其中bcl-2,p53的表达与NE分化有密切关系(P<0.05)。结论 NSCLC中有相当一部分伴有NE分化,NSCLC-NE具有与其它NSCLC不同的生物学特性。NSCLC-NE中可以检测到高表达的bcl-2蛋白、突变型p53蛋白,p53突变导致的bcl-2/Bax的失衡在NSCLC-NE的发生和发展中可能起重要作用。  相似文献   

5.
目的:探讨极光激酶( Aurora A)、Ki?67、p53和p21 WAF1在行根治术非小细胞肺癌( NSCLC)患者预后中的价值。方法采用免疫组化检测Aurora A、Ki?67、p53和p21 WAF1在58例NSCLC根治术后患者中的表达情况,分析各指标的表达与患者临床病理特征及预后的关系。结果Aurora A、Ki?67、p53和p21 WAF1在NSCLC中的阳性率分别为89.7%(52/58)、53.4%(31/58)、46.6%(27/58)和34.5%(20/58)。 Aurora A高表达患者的淋巴结转移率为69.2%,高于低表达者(37.8%, P=0.045)。 Aurora A低表达组和高表达组患者的3年生存率分别为75.0%和46.0%,差异有统计学意义( P=0.039)。 Aurora A高表达和p53阳性组、Aurora A高表达或p53阳性组、Aurora A低表达和p53阴性组患者的3年生存率分别为40.0%、65.0%和82.1%,差异有统计学意义( P=0.039)。 Cox多因素分析结果显示,Aurora A和p53联合检测为影响NSCLC患者预后的独立因素( P=0.015)。结论Aurora A和p53为影响 NSCLC 患者预后的不良因素,与 p53突变相关的 Aurora A 高表达为影响NSCLC患者预后的独立不良因素。  相似文献   

6.
Cyclin D1和p27kip1在胃黏膜癌变过程中的表达   总被引:1,自引:0,他引:1  
目的:探讨Cyclin D1和p27^kip1蛋白在胃黏膜癌变过程中的表达及相互关系。方法:采用免疫组化SP法分别检测慢性浅表性胃炎(chronic superficial gastritis,CSG)、慢性萎缩性胃炎(chronic atrophic gastritis,CAG)、肠化生(intestinal metaplasia,IM)、不典型增生(dysplasia,DYS)和胃癌(gastric carcinoma,GCA)组织中CyclinD1和p27^kip1的表达变化。结果:Cyclin D1的过表达随病变发展表达率逐渐增高,CAG组与CSG组比较,差异无统计学意义,P〉0.05;IM、DYS、GCA组与CSG组比较,差异均有统计学意义,P均〈0.05。p27^kip1在上述黏膜中的表达呈递减趋势,CSG中最高,GCA组最低,CAG组和CSG组比较,差异无统计学意义,P〉0.05;IM、DYs、GcA组与CSG组比较,差异均有统计学意义,P〈0.05。Cyclin D1和p27^kip1的表达呈负相关,γ=-0.53,P=0.000。结论:胃黏膜癌变过程中的CyclinD1阳性表达呈递增趋势,p27^kip1表达呈递减趋势;Cyclin D1和p27^kip1表达变化发生在胃黏膜癌变早期,两者在胃癌黏膜癌变过程中的表达呈负相关提示两者可能存在相互抑制机制。  相似文献   

7.
目的:探讨新辅助化疗对骨肉瘤组织中细胞周期素D1(Cydin D1)、Bcl-2,增殖细胞核抗原(proliferating cell nuclear antigen,PCNA)和P-糖蛋白(P-glycoprotein,P-gp)表达的影响,及与肿瘤细胞坏死率(tumor cell necrosis rate.TCNR)的关系。方法:应用免疫组织化学技术检测化疗前后23例骨肉瘤组织标本中Cyclin D1、Bcl-2、PCNA和P-gp的表达,并计算TCNR。结果:新辅助化疗前Cyclin D1、Bel-2、PCNA和P-gp的阳性表达率分别为73.9%(17/23)、69.6%(16/23)、91.3%(21/23)和21.7%(5/23)。新辅助化疗后的阳性表达率分别为52.2%(12/23)、34.8%(8/23)、43.5%(10/23)和56.5%(13/23)。化疗后,骨肉瘤组织中Bel-2、PCNA的表达低于化疗前。P值分别为0.039和0.034;P-gp高于化疗前,P=0.021;Cyclin D1的表达差别无统计学意义,P=0.180。化疗前Cyclin D1、Bel-2、PCNA和P-gp的表达与TCNR无相关性,P值分别为0.155、0.371、1.000和0.640;而化疗后Bel-2、PCNA和P-gp的表达与TCNR呈负相关,P值分别为0.009、0.012和0.0151 Cyclin D1的表达与TCNR无相关性。P=0.100。结论:新辅助化疗可能通过抑制肿瘤细胞的增殖和促进肿瘤细胞的凋亡这到杀灭骨肉瘤细胞的目的;同时,由于MDR的过度表达,增加骨肉瘤细胞对化疗药物的耐药性。检测化疗前Cyclin D1、Bd-2、PCNA和P-gp在肿瘤细胞中的表达尚难以预测骨肉瘤的化疗疗效。  相似文献   

8.
非小细胞肺癌表达p53蛋白与放疗敏感性   总被引:3,自引:0,他引:3  
姜斌  刘静 《肿瘤防治杂志》2002,9(2):165-166
目的:研究p53蛋白在非小细胞肺癌(NSCLC)组织中的表达水平与放疗敏感性的关系。方法:采用常规的10%甲醛固定,石蜡包埋标本,包括组化分析p53蛋白的表达及其与放疗敏感性的关系。结果:p53蛋白表达阳性率为40%(20/50),70%(21/30)%的p53蛋白(-)肿瘤放疗有效,而p53蛋白(+)中仅15%(3/20)有效(P<0.01)。结论:p53蛋白可作NSCLC放疗敏感性预测的参考指标。  相似文献   

9.
目的 探讨端粒酶活性p53基因和增殖细胞核抗原(PCNA)在肺癌发生发展中的作用,以及端粒酶与临床病理特点及p53,PCNA蛋白之间的关系。方法 TRAP法检测59例肺癌和35例癌旁正常组织中端粒酶活性,采用免疫组织化学法检测44例肺癌组织和35例癌旁正常组织中p53和增殖细胞核抗原(PCNA)蛋白的表达,并对端粒酶活性与临床病理特征以及p53PCNA蛋白表达的关系进行分析。结果 肺癌组织端粒酶活性,p53和PCNA蛋白阳性率分别为81.3%(48/59)、77.2%(34/44)、79.5%(35/44);癌旁正常组织端粒酶活性,p53和PCNA蛋白阳性率分别为20.0%(7/35)、8.6%(3/35)、14.3(5/35),肺癌组织显著高于癌旁正常组织,P<0.01,肺癌组织不同的病理类型之间、TNM各期之间以及不同的细胞分化程度之间端粒酶活性的阳性率未发现明显的差异(P>0.05);端粒酶活性与p53,PCNA蛋白表达之间无明显相关性。结论 端粒酶活化参与各型、各期和不同分化程度肺癌的发生发展;端粒酶在肺癌组织高表达和正常肺组织低表达的特性,有望使端粒酶成为肺癌诊断的1种标志物;p53和PCNA均参与肺癌的发生发展过程;端粒酶与p53和PCNA无明显相关性,提示肺癌是由多基因参与的疾病。  相似文献   

10.
鼻咽癌p53 p21 WAF1和MDM2蛋白异常表达的临床意义   总被引:5,自引:2,他引:5  
目的:探讨p53、p21^WAF1、MDM2蛋白在原发鼻咽癌(NPC)异常表达的临床意义。方法:采用LSAB法检测69例原发NPC组织中p53、p21^WAF1和MDM2蛋白的表达状况。结果:1)p53、p21^WAF1和MDM2蛋白在原发NPC组织的阳性表达率分别为79.7%、84.1%、和82.6%;高表达率分别为50.7%、46.4%和31.9%。2)p53蛋白的高表达率随TNM分期的升高而增多,P=0.042。3)p53或MDM2蛋白高表达者的复发间期显著短于相应蛋白低表达/阴性者,分别P=0.038和P=0.002。4)p53和MDM2蛋白同时高表达者、MDM2蛋白高表达同时p21^WAF1蛋白低表达/阴性者的复发间期明显短于对照组,分别P<0.001;p21^WAF1蛋白高表达同时p53蛋白低表达/阴性者、p53和MDM2蛋白同时低表达/阴性者的复发间期显著长于对照组,分别P=0.002和P=0.014。5)p53和MDM2蛋白高表达同时p21^WAF1蛋白低表达/阴性者的复发间期明显短于对照组,P<0.001;p53和MDM2蛋白低表达阴性同时p21^WAF1蛋白高表达者的复发间期明显长于对照组,P=0.002。结论:p53或MDM2蛋白高表达提示有促进NPC复发的作用,p21^WAF1蛋白高表达提示有抑制NPC复发的作用。单独检测p53或MDM2蛋白在原发NPC组织的表达情况可以和为预测NPC复发倾向和临床预后的参考指标;如同时检测p53、MDM2和p21^WAF1蛋白的两项或三项指标,预测意义更理想。  相似文献   

11.
非小细胞肺癌组织中PTEN/p27kip1的表达及其意义   总被引:1,自引:0,他引:1  
目的检测PTEN、p27kip1、cyclin 3种蛋白在非小细胞肺癌组织的表达及与临床病理特征的关系.方法在60例非小细胞肺癌原发灶(包括37例鳞癌和23例腺癌)中应用免疫组织化学S-P法检测3种蛋白的表达.结果 60例肺癌原发灶中PTEN、p27kip1、cyclin 3种蛋白表达阳性率分别为:48.3%;41.7%;73.3%.PTEN与淋巴结转移显著相关(<0.05)p27kip1、cyclin 与淋巴结转移无关(>0.05)这3种蛋白表达均与肿瘤细胞分化程度显著相关(<0.05)与组织学类型无关(>0.05)60例非小细胞肺癌组织中,PTEN的表达与p27kip1呈显著正相关(P<0.01),而与cyclin 无明显相关(>0.05)p27kip1与cyclin 的表达之间呈显著负相关(P<0.01).结论 PTEN明显地抑制了非小细胞肺癌的浸润和转移,p27kip1表达缺失与肺癌细胞的分化有关,PTEN/p27kip1衰老诱导途径在非小细胞肺癌的恶性进展中起着很重要的作用.  相似文献   

12.
背景与目的核因子kappa B(NF-kappa B)和激活蛋白1(AP-1)在细胞凋亡和增生过程中所起的作用逐渐被人们所认知,在肿瘤的形成过程中也扮演着重要的角色。本研究分析了NF-kappaB、AP-1在非小细胞肺癌中的表达,以明确二者之间的相互关系,并进一步研究二者对周期蛋白cyclin D1和caspase 3在非小细胞肺癌中表达的影响。方法应用Western blot检测NFkappaB、AP-1、cyclin D1和caspase 3在非小细胞肺癌中的蛋白表达,应用RT-PCR检测不同NF-kappaB和AP-1表达的肺癌组织中cyclin D1和cAspase 3的mRNA表达。应用相关分析判断NF-kappa B和AP-1的相关性。结果在45例非小细胞肺癌患者中,NF-kappaB和AP-1在肺癌组织中的表达均高于癌旁肺组织中的表达(0.6047比0.2798,P〈0.01)。在NF-kappaB和AP-1较高表达的肺癌组织中,cyclin D1蛋白表达和mRNA表达均增加(P〈0.01),而caspase 3的蛋白表达和mRNA表达减少(P(0.01)。相关分析显示NFkappaB和AP-1有明显的相关性(r=0.800,P(0.01)。结论NF-kappaB和AP-1作为转录因子可能在非小细胞肺癌的形成和发展中起重要作用。  相似文献   

13.
In a previous small series of surgically treated non-small cell lung cancer patients (NSCLC), we found that higher apoptotic index (AI) negatively influenced survival (Dworakowska D, Jassem E, Jassem J, Karmolinski A, Dworakowski R, Wirth T, et al. Clinical significance of apoptotic index in non-small cell lung cancer: correlation with p53, mdm2, pRb and p21WAF1/CIP1 protein expression. J Cancer Res Clin Oncol 2005; 131:617–623.). In this study we attempted to verify our previous finding in larger group of 170 NSCLC cases, additionally correlating AI to selected cell cycle regulators as well as a proliferation marker. Apoptosis was assessed with the use of the TUNEL technique, whereas the expression of p53, pRb, mdm2, p21WAF1/CIP1, cyclin D1 and PCNA were assessed immunohistochemically. The mean and the median AI was 12 and 8, respectively. The expression of p53, pRb, mdm2, p21WAF1/CIP1 proteins and cyclin D1 was found in 47%, 71%, 37%, 65% and 40% of cases, respectively. The mean and the median PCNA labeling index (PCNA LI) was 34 and 35, respectively. AI was not correlated with any patient characteristic or other tumor markers. In uni- and multivariate analysis AI, analysed separately or jointly with cell cycle regulators and PCNA LI, did not influence disease-free or over-all survival. However, patients with “very high AI/very high PCNA LI” had a particularly poor prognosis (P = 0.001). Patients with “very low AI/negative pRb” phenotype survived for a shorter time in comparison to others (P = 0.04). In addition, patients with the highest PCNA LI had a worse outcome in comparison to patients with the lowest PCNA LI (P = 0.04), especially those with concomitant p53 protein expression (P = 0.026) or lacking pRb protein expression (P = 0.04). This study demonstrates that joint analysis of several factors involved in apoptosis, proliferation and cell cycle regulation, but not AI alone, might provide additional prognostic information in NSCLC patients.  相似文献   

14.
目的探讨原钙黏附蛋白9(protocadherin 9,PCDH9)和细胞周期蛋白D1(cyclin D1)的表达与非小细胞肺癌(non-small cell lung cancer,NSCLC)生物学行为的相关性及其临床意义。方法收集2007-08-01-2013-05-31武警广东总队医院手术切除的NSCLC组织337例,QRT-PCR及免疫组织化学染色方法分别检测其中临床资料完整的142例肿瘤及癌旁组织中PCDH9及cyclin D1基因和蛋白表达,分析其相关性及临床意义。结果在142例肺癌组织中,PCDH9的表达为0.386±0.008,低于癌旁组织的0.994±0.012,差异有统计学意义,t=5.748,P〈0.001;cyclin D1在癌组织中的表达为7.392±0.079,较癌旁组织的1.004±0.007明显增高,差异有统计学意义,t=13.219,P=0.003。同一患者组织标本中的PCDH9与cyclin D1的表达呈负相关,r=-0.478,P=0.009。PCDH9及cyclin D1蛋白的表达与患者性别、年龄和组织来源无关,P值均〉0.05;而与肿瘤的分期、转移、对化疗药物的敏感性及总生存时间相关,差异有统计学意义,P值均〈0.05;PCDH9高表达患者的中位生存时间较低表达者明显延长,差异有统计学意义,χ^2=68.051,P〈0.001,cyclin D1高表达患者的中位生存时间较低表达者缩短,差异有统计学意义,χ^2=74.436,P〈0.001。结论 PCDH9及cyclin D1表达可能与NSCLC发生发展及转移相关,并可作为评估NSCLC恶性生物学行为及预后的参考指标。  相似文献   

15.
Cyclin D1, like p16INK4 (p16) and retinoblastoma (RB) proteins, participates in the cell cycle control at the G1-S transition. We have previously demonstrated altered p16 and RB protein status in non-small-cell lung cancers (NSCLCs) and their potential synergistic effect with altered p53 protein on proliferative activity (Kinoshita et al (1996) Cancer Res 56: 5557-5562). In the present study, cyclin D1 expression was studied by immunohistochemistry in the same cohort of 111 resected NSCLCs as in our previous study, and the amount of the cyclin D1 gene was analysed by Southern blot analysis in 29 NSCLCs. Cyclin D1 expression was analysed in relation to the status of p53, p16 and RB proteins, and proliferative activity determined by the Ki-67 index. It was also analysed in relation to survival of 77 patients with NSCLCs which were potentially curatively resected between 1990 and 1995. We found that: (1) cyclin D1 was expressed in 13 (11.7%) of 111 NSCLCs; (2) the cyclin D1 gene was neither significantly amplified nor rearranged; (3) cyclin D1 expression significantly correlated with altered p53 protein expression (P = 0.04), whereas it did not correlate with p16 and RB protein status; (4) proliferative activity tended to be higher in cyclin D1-positive (+) tumours than in cyclin D1-negative (-) tumours, although this difference was not statistically significant (P = 0.08); and (5) patients with cyclin D1+ tumours survived longer than patients with cyclin D1- tumours (5-year survival rates, 89% and 64% respectively, by the Kaplan-Meier method; P = 0.045 by the log-rank test), and cyclin D1 expression tended to be a favourable prognostic factor (P = 0.08 in univariate analysis). These findings suggest the involvement of cyclin D1 in the development and progression of NSCLCs, their proliferative activity and clinical outcome of NSCLC patients.  相似文献   

16.
非小细胞肺癌中P—gp,p53,bcl—2蛋白表达及其相关性研究   总被引:3,自引:0,他引:3  
舒红  李云 《实用癌症杂志》2000,15(4):379-381
目的 研究非小细胞肺癌(NSCLC)中p53、bcl-2蛋白以及耐多药基因MDR1产物P-糖蛋白(P-gp)的表达及相互关系,探讨它们在NSCLC发展、预后及耐药中的作用。方法 采用免疫组化S-P法,对60例NSCLC及其癌旁正常肺组织中p53、bcl-2蛋白和P-gp进行检测。结果 p53、bcl-2蛋白及Pgp在NSCLC中表达明显高于癌旁正常组织(P〈0.01)。两者都与患者预后显著负相关(  相似文献   

17.
The purposes of this study were to investigate the effects of phosphatidylethanolamine-binding protein 4 (PEBP4) on the cell growth, proliferation, apoptosis, and invasion of non-small cell lung cancer (NSCLC) cells and to provide evidence for future treatment options for NSCLC. Western blot assays were performed to examine PEBP4 protein expression levels in NSCLC cell lines (HCC827, A549, NCI-H661, NCI-H292, and 95-D) and a normal human bronchial epithelial (HBE) cell line. A PEBP4 shRNA expression vector was constructed and transfected into HCC827 cells. Subsequently, the effects of PEBP4 on the cell viability, cell cycle distribution, apoptosis levels, and invasion properties of HCC827 cells were analyzed using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assays, flow cytometry analyses, and transwell invasion assays. In addition, the effects of PEBP4 on the expression of proteins including cyclin D1, p53, Bcl-2, MMP-2, and MMP-9 were investigated. PEBP4 was highly expressed in lung cancer cells (HCC827, A549, NCI-H661, NCI-H292, and 95-D), but its expression was low in HBE cells. Cell viability, cell proliferation, and invasion of HCC827 cells in the PEBP4 knockdown group were significantly lower than that in the negative control and blank control groups (p?<?0.05), and there were no significant differences between the negative and blank control groups in terms of cell viability, cell proliferation, apoptosis, and invasion. In HCC827 cells, the expression levels of cyclin D1, Bcl-2, MMP-2, and MMP-9 in the PEBP4 knockdown group were significantly lower (p?<?0.05), and the expression of p53 protein was significantly higher than that in the negative and blank control groups (p?<?0.05). There were no significant differences between the negative and blank control groups in the expression levels of cyclin D1, p53, Bcl-2, MMP-2, and MMP-9. In conclusion, PEBP4 enhanced HCC827 cell proliferation and invasion ability and inhibited apoptosis. Decreased PEBP4 expression may play a role in the reduced invasion ability and increased apoptosis of the human NSCLC cell line HCC827.  相似文献   

18.
The expression of cell-cycle progression molecules cyclin D1 and cyclin E were immunohistochemically examined in a series of 64 squamous cell invasive carcinomas of the larynx, 10 in situ carcinomas, 34 cases of dysplasia, 11 papillomas and 23 cases of keratosis. The results of their expression were compared with two cell-cycle implicated tumor suppressor proteins p53 and pRb as well as with two proliferation associated indices PCNA and Ki-67 in an attempt to elucidate their potential role in the pathogenesis and progression of these lesions. Nuclear staining for cyclin D1 and E (>5% positive cells) was observed in 19% and 39.7% of the laryngeal carcinomas, respectively. Significantly elevated levels of cyclin D1 and E in invasive laryngeal carcinomas compared with in situ carcinomas were revealed (p=0.045 and p=0.0003, respectively). High levels of cyclin D1 and E expression were correlated with increased Ki-67 score (p=0.037 and 0.017 respectively). A significant positive correlation between cyclin D1 and E was also detected in carcinomas (p=0.018). Decreased levels of cyclins D1 and E in the group of in situ carcinomas compared with those of dysplastic cases and papillomas were also observed. In the dysplastic lesions cyclin D1 expression was correlated with pRb expression (p=0.02). In the cases of keratosis cyclins D1 and E expression were correlated with pRb (p=0.002 and p=0.036, respectively), while cyclin D1 was associated with PCNA (p=0.008) and Ki-67 score (p=0.009). The prognostic significance of cyclins D1, E in determining the risk of recurrence and overall survival with both univariate (long-rang test) and multivariate (Cox regression) methods of analysis showed no statistically significant differences. We conclude that the expression of cyclins D1 and E in squamous cell carcinomas of the larynx does not seem to have a prognostic significance. In addition, their expression may be involved in the development of laryngeal lesions, implicated in cell proliferation, with other cell cycle related proteins, probably by different molecular pathways.  相似文献   

19.
目的 探究防己诺林碱在肺癌中的作用及其分子机制。方法 MTS法检测经10、15、20、30、40和60 μM/L防己诺林碱处理的肺癌H1299和A549细胞的增殖情况,通过Caspase3、Caspase8和Caspase9活性检测试剂盒和TUNEL试剂盒检测细胞凋亡情况。Western blot检测MAPK信号通路(p-Akt、PI3K、mTOR和Akt蛋白)、增殖和转移(MMP-2、MMP-9、PCNA、Cyclin D1和P21蛋白)、周期和凋亡(Cyclin D2、Bcl2、MCL-1、Bax和p53蛋白)相关蛋白的表达情况,通过Real-time PCR检测PI3k、mTOR、MMP-2、MMP-9、PCNA、Cyclin D1、Cyclin D2、MCL-1、Bax、Bcl2和TP53基因表达情况。结果 防己诺林碱会抑制肺癌H1299和A549细胞的增殖,诱导细胞凋亡,增加Caspase3、Caspase8和Caspase9酶活性。经防己诺林碱处理后,PI3K、p-Akt、mTOR、MMP-2、MMP-9、PCNA、Cyclin D1、Cyclin D2和Bcl2蛋白表达降低,P21、MCL-1、Bax和p53蛋白表达升高,并且表现为剂量依赖性,但对Akt蛋白表达无影响;PI3K、mTOR、MMP-2、MMP-9、PCNA、Cyclin D1、Cyclin D2和Bcl2基因表达降低,TP53、MCL-1和Bax基因表达增加。结论 防己诺林碱通过调控MAPK信号通路、增殖和转移、周期和凋亡相关蛋白和基因的表达,从而抑制细胞增殖,诱导细胞凋亡。  相似文献   

20.
人非小细胞肺癌组织中survivin,caspase-3及P21WAF1的表达意义   总被引:3,自引:0,他引:3  
目的 探讨非小细胞肺癌(non-small cell lung cancer,NSCLC)中survivin,caspase-3和p21WAF1的蛋白表达与临床病理指标的关系以及survivin与caspase-3和p21WAF1蛋白表达之间的关系.方法在57例NSCLC原发灶中应用免疫组织化学S-P法检测survivin,caspase-3和p21WAF1蛋白的表达.结果在57例NSCLC原发灶中survivin,caspase-3和p21WAF1 3种蛋白表达阳性率分别为71.93%,66.67%,49.12%.它们均与组织学类型无关(P>0.05),而与淋巴结转移均有显著性相关(P<0.05);survivin,caspase-3蛋白的表达与肿瘤细胞分化程度无关(P>0.05),但p21WAF1与肿瘤细胞分化程度显著相关(P=0.018).57例NSCLC中,survivin的表达与caspase-3,p21WAF1均呈显著负相关(P=0.001及P=0.000).结论survivin,caspase-3和p21WAF1均与NSCLC的浸润进展显著相关.survivin可能直接作用于caspase-3,阻断了细胞的凋亡过程,或通过抑制p21WAF1的表达而缩短了细胞周期,从而促进了NSCLC的癌细胞不断增生.  相似文献   

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