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目的探讨耐药相关蛋白在肺癌组织中的表达与药物敏感性的关系。方法应用免疫组化法、四唑蓝快速比色法(MTT法)分别检测P-糖蛋白(P-gp)、多药耐药相关蛋白(MRP)、肺耐药蛋白(LRP)、谷胱苷肽s转移酶(GST-π)蛋白在87例肺癌组织中的表达和10种抗癌药的体外药敏试验。结果P-gp、MRP、GST-π阳性表达及高表达者中,腺癌组药物敏感数明显低于鳞癌组(P<0.05),LRP阳性表达者中NSCLC组药物敏感数明显低于LRP阴性表达者(P<0.05)。LRP与MMC、5-FU、VP-16、VCR均呈负相关(P<0.05或0.01)。P-gp与顺铂(CDDP)呈负相关(P<0.05)。GST-π与MTX、HCPT呈正相关(P<0.05行)。结论P-gp、MRP、LRP、GST-π的蛋白表达及共表达与体外药敏试验存在较好相关性,可作为监测肺癌细胞原发性耐药的指标。 相似文献
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多药耐药基因产物P-gp、TopoⅡ在胃癌组织中的表达及意义 总被引:3,自引:1,他引:2
目的 探讨胃癌组织中多药耐药 (MDR)基因产物 P-糖蛋白 (P- gp) ,DNA拓扑异构酶 (Topo )表达与胃癌分型、分期和淋巴结转移间的关系。方法 应用链菌素亲生物素 -过氧化物酶 (SP)法 ,对 10 6例胃癌标本中的 P- gp、 Topo 进行检测。结果 P- gp表达与胃癌临床分期有关 (P<0 .0 5 ) ;Topo 表达与胃癌组织分型有关 (P<0 .0 5 ) ;P- gp高表达和 Topo 低表达与胃癌淋巴结转移相关 (P<0 .0 5 )。结论 检测 P- gp、Topo 不仅可以作为多药耐药的标志物 ,而且对于胃癌治疗方案的选择和预后判断具有重要参考价值。 相似文献
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目的:研究耐药基因P-糖蛋白(P-gP)、谷胱甘肽S-转移酶(GST-π)、拓朴异构酶Ⅱ(Topo-Ⅱ) 和肺耐药相关蛋白(LPR)在贲门癌组织中表达及其临床意义.方法:采用免疫组化SP法检测P-gP,GST-π, Topo-Ⅱ和LRP在69例贲门癌组织中的表达状况结果:P-gp,GST-π,Topo-Ⅱ和LRP在贲门癌组织中阳性表达分别为49.2%,75.4%,68.1%和58%,均高于正常组织(0,30%,20%和0, P<0.01).随分化程度由高到低,P-gp阳性表达率分别为40%,42.4%,61.5%,差异无显著意义(p>0.05),GST-π表达率分别为40%,75.8%和88.5%,差异有显著意义(P<0.05),Topo-Ⅱ表达率分别为33.3%,69.7%和80.7%,差异有显著意义(P<0.01),LRP表达率分别为50%, 54.5%和65.3%,差异无显著意义(P>0.05).临床分期Ⅰ、Ⅱ期和Ⅲ、Ⅳ期中,P-gp阳性表达率分别为28.6%和58.3%,差异有显著意义 (P<0.05),GST-π表达率分别为57.1%和83.2%, 差异有显著意义(P<0.05),Topo-Ⅱ表达率分别为57.1%和72.9%,差异无显著意义(P>0.05), LRP表达率分别为38%和66.6%,差异有显著意义(P>0.05).在有无淋巴结转移分组中,P-gp 阳性表达率分别为67.5%和24.1%,差异有显著意义(P<0.01),GST-π表达率分别为87.5%和58.6%,差异有显著意义(P<0.05),TOpo-Ⅱ表达率分别为65%和72.4%,差异无显著意义 (P>0.05),LRP表达率分别为70%和41.4%,差异有显著意义(P<0.05).四种耐药基因在贲门癌组织中存在共同表达.结论:贲门癌存在多个耐药基因的共同表达, 联合检测有助于对化疗药物敏感性作前瞻性预测和化疗方案的优化组合. 相似文献
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目的研究多药耐药相关蛋白P-糖蛋白(gp)和拓扑异构酶II(Topo-II)在原发性肝癌组织中的表达及临床意义。方法采用免疫组化S-P法检测49例原发性肝癌组织P-gp和Topo-II的表达。结果P-gp和Topo-II在原发性肝癌中阳性表达率分别为61.22%(30/49)和32.65%(16/49),P-gp主要在细胞膜和细胞浆中表达,Topo-II在细胞核内表达,P-gp和Topo-II表达与Edmonson分级有关,Topo-II还与转移有关。P-gp、Topo-II在原发性肝癌中表达呈负相关(P<0.05)。结论肝癌组织P-gp和Topo-II表达可能是肝癌对化疗不敏感的原因之一。 相似文献
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肺癌化疗前后常产生多药耐药使化疗失败,目前认为生物膜上某些糖蛋白与多药耐药有关,本文拟对这些糖蛋白的结构、功能及与肺癌的多药耐药机制加以概述。 相似文献
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P-gp,ToPoⅡ和GST-π在胃癌组织中的表达及与预后的关系 总被引:6,自引:0,他引:6
目的:探讨胃癌患者中耐药基因P-糖蛋白(P-gp)、DNA拓扑异构酶Ⅱ(TopoⅡ)和谷胱苷肽-S转移酶(GST-π)的表达特点及对预后的影响.方法:用免疫组化方法检测130例胃癌组织中的P-gp,TopoⅡ及GST-π,分析其与临床病理特征的关系,并随访部分患者以研究其表达与预后的相关性.结果:在130例胃癌患者中,P-gp,TopoⅡ和GST-π表达的阳性率分别为24.62%,81.54%和75.38%.这3种耐药基因中,P-gp和GST-π与病变大小相关,病变直径>5cm患者中,其阳性率显著高于直径<5cm患者(χ2=4.56,P=0.033;χ2=5.545,P=0.020),有淋巴结转移患者P-gp的阳性表达率高于无淋巴结转移组(χ2=5.84,P=0.016),有血管侵犯患者P-gp和GST-π阳性表达率高于无血管侵犯患者(χ2=17.69,P<0.001;χ2=5.40,P=0.020),P-gp和GST-π表达为 ~ 患者2a生存率明显低于-~ 患者(χ2=3.964,P=0.047;χ2=4.2576,P=0.039);TopoⅡ的表达与病理类型及分化程度有关,在印戒细胞癌中表达率低于其他类型(χ2=7.29,P=0.007),且在低分化组中强阳性表达率明显低于中高分化组(χ2=7.79,P=0.005).结论:P-gp和GST-π的表达不仅与胃癌的生物学行为有关,同时也可作为判断胃癌患者预后的指标之一.耐药基因在胃癌中的表达程度及特点不同,因而有必要对其进行联合检测以判断耐药及预后情况. 相似文献
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P-gp,ToPoⅡ和GST-π在胃癌组织中的表达及与预后的关系 总被引:5,自引:0,他引:5
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目的研究多药耐药相关蛋白P-糖蛋白(gp)和拓扑异构酶Ⅱ(Topo-Ⅱ)在原发性肝癌组织中的表达及临床意义。方法采用免疫组化S-P法检测49例原发性肝癌组织V-gp和Topo-Ⅱ的表达。结果V-gp和Topo-Ⅱ在原发性肝癌中阳性表达率分别为61.22%(30/49)和32.65%(16/49),V-gp主要在细胞膜和细胞浆中表达,Topo-Ⅱ在细胞核内表达,V-gp和Topo-Ⅱ表达与Edmonson分级有关,Topo-Ⅱ还与转移有关。V-gp、Topo-Ⅱ在原发性肝癌中表达呈负相关(P〈0.05)。结论肝癌组织V-gp和Topo-Ⅱ表达可能是肝癌对化疗不敏感的原因之一。 相似文献
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目的探讨原发性上皮性卵巢癌(POEC)组织中P-糖蛋自(P—gP)及肺耐药蛋白(LRP)的表达及意义。方法采用免疫组化法检测56例POEC、15例卵巢良性肿瘤、12例正常卵巢组织中的P—gP、HIP,并分析其与POEC患者临床病理参数的关系。结果P-gp、LRP在POEC组织中的阳性表达率显著高于卵巢良性肿瘤和正常卵巢组织(P均〈0.01);LRP的表达与POEC患者腹腔积液有关(P〈0.01);术前化疗的POEC患者P-gp、LRP阳性表达率高于初治者(P〈0.01),P-gp、LRP表达阳性的POEC对化疗反应差。结论P-gp、LRP在POEC组织中的阳性表达率高于卵巢良性肿瘤和正常卵巢组织;化疗可使POEC组织P-gp、LRP的阳性表达率升高;P-gp及LRP的表达可预测POEC对铂类药物化疗的疗效。 相似文献
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目的 评价耐多药结核病(MDR-TB)患者外周血中单核细胞P糖蛋白和多药耐药相关蛋白(MRP)表达水平的变化.方法选择2004年9月至2007年12月在武汉市结核病防治所住院治疗的MDR-TB患者89例为耐多药组,其中男52例,女37例;年龄17~62岁,平均(45±6)岁;平均病史3.5年;均符合MDR-TB的诊断标准.同期在武汉市结核病防治所住院的初治结核病患者55例为结核病组,其中男34例,女21例;年龄18~60岁,平均(48±8)岁;平均病史1.2年;痰涂片均为阳性.对照组为武汉市结核病防治所无肺结核史的工作人员31例,其中男19例,女12例;年龄25~62岁,平均(44±5)岁.抽取外周血,采用实时定量PCR法,分别检测单核细胞P糖蛋白和MRP的mRNA水平.多组间比较采用单因素方差分析,组间两两比较采用SNK-q检验.结果 耐多药组P糖蛋白mRNA表达的吸光度值(1.34±0.32)与结核病组(1.12±0.23)和对照组(1.05±0.16)比较,差异无统计学意义(F=0.536,P>0.05).耐多药组MRP的mRNA表达(3.45±0.43)明显高于结核病组(1.23±0.34)和对照组(1.04±0.12),3组比较,差异有统计学意义(F=24.241,P<0.05),耐多药组分别与其他2组比较,差异均有统计学意义(P<0.01).结论 MRP高表达与MDR-TB患者的多耐药存在一定的相关性.Abstract: Objective To evaluate the expression of P-glycoprotein (P-pg) and multidrug resistance-associated protein (MRP) mRNA levels in peripheral blood mononuclear cells from multidrug resistant tuberculosis (MDR-TB) patients. Methods The subjects of this study included 3 groups: a non-TB control group, a TB control group and a MDR-TB group. The 31 subjects in the non-TB control group were staff from Wuhan Tuberculosis Prevention and Treatment Institute. The 55 cases in the TB control group were in-patients during September 2004 to December 2007 who were diagnosed as having pulmonary tuberculosis. The 89 cases in the MDR-TB group were in-patients during the same period, but who were diagnosed as having MDR-TB. Peripheral mononuclear cells were isolated and mRNA levels of P-pg and MRP were measured by real-time PCR. Comparisons of the data between different groups were performed using one-way ANOVA, and SNK q was used for comparison between 2 groups.Results There was no significant difference in the relative P-pg mRNA levels among the MDR-TB group (1.34±0.32), the non-TB control group (1.05±0.16) and the TB control group (1.12±0.23), F=0.536, P>0.05. The relative MRP mRNA level (3.45±0.43) was the highest in the MDR-TB group (3.45±0.43), as compared to the TB control group (1.23±0.34) and the non-TB control group (1.04±0.12), F=24.241, P<0.05. Conclusion Higher expression of MRP in peripheral mononuclear cells might be related to multidrug resistance in MDR-TB patients. 相似文献
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多药耐药基因1 P-糖蛋白在肺癌中的表达及其临床意义 总被引:5,自引:0,他引:5
采用 SABC免疫组化法对 10 6例肺癌组织进行多药耐药基因 1P-糖蛋白 (以下简称 P- gp)表达检测 ,并进行相关临床因素分析。10 6例标本中 ,P- gp阳性率 5 6 .6 % ,低分化鳞癌、腺癌与中、高分化型 P- gp阳性率分别为4 2 .9%及 78.6 % ,差别显著 (P<0 .0 5 ) ;P- gp阳性表达的鳞癌 (5 5 .6 % )与腺癌 (86 .7% )、小细胞未分化癌 (SCL C)(18.1% )与非小细胞未分化癌 (NSCL C) (6 6 .7% )之间均有显著性差异 (P均 <0 .0 5 ) ;TNM分期 ~ 期 P- gp阳性率分别为 5 5 .6 %、5 2 .6 %、5 6 % ,统计学无差异 (P>0 .0 5 ) ;有淋巴结转移的 P- gp阳性表达为 5 9% ,无淋巴结者为 5 7.2 % ,二者无显著差异 (P>0 .0 5 )。32例接受化疗 P- gp阳性者的有效率为 2 2 .2 % ,阴性者为 5 7.1% ,有显著性差异 (P<0 .0 5 )。认为 P- gp可作为预示化疗敏感性的分子标记物 ,是评价化疗耐药性和预后的可靠指标 相似文献
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目的探讨多药耐药基因、多药耐药相关蛋白(MRP)、肺耐药蛋白(LRP)、谷胱甘肽-S转移酶π(GST-π)mRNA在非小细胞肺癌(NSCLC)中的共表达情况及临床意义。方法1996-10~2001-10采用逆转录-多聚酶链反应技术(RT-PCR)检测哈尔滨医科大学呼吸内科49例NSCLC组织中上述耐药基因的4种多药耐药基因共表达水平,随访生存时间,计算生存概率。结果在NSCLC中总阳性率分别为53.1%,65.3%,67.3%,83.3%。两种和(或)两种以上阳性共表达率与单一阳性表达率之间有显著差异性(P<0.05)。阳性表达率在NSCLC的不同临床分期、分化程度间无差异性(P>0.05)。随着多药耐药基因共表达种类增加,生存曲线左移,生存时间缩短。结论NSCLC的MDR现象是由多药耐药基因共表达引起的,多药耐药基因共表达种类对预后有直接影响,可作为评价预后的可靠指标。 相似文献
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靳胜 《世界华人消化杂志》2012,(2):160-163
目的:探讨MRP基因、LRP基因和MDR1基因在胃癌中的表达及其与疾病发生发展相关性的研究.方法:应用实时荧光定量PCR(real-time fluorescence quantitative PCR,FQ-PCR)分别检测47例胃癌标本和17例正常胃组织对照标本的MRP基因、LRP基因和MDR1基因表达,分析其与病情发生发展以及转归的关系.结果:MRP基因、LRP基因和MDR1基因在胃癌组织中的表达均高于正常标本,MRP在早期胃癌中显著高于进展期胃癌(P<0.05),高、中分化腺癌显著高于低、未分化腺癌(P<0.05);LRP基因表达无淋巴结转移组显著高于淋巴结转移组(P<0.05).MRP在病情恶化患者中上调30%.结论:MRP基因、LRP基因和MDR1在胃癌组织中均有较高的表达,三者可能具有协同作用,检测3种基因的表达有利于制定更合理的治疗方案. 相似文献
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应用免疫组化法 ,对 2 7例初治和 2 1例复发及难治的急性淋巴细胞白血病 (AL L )患儿检测外周血或骨髓中白血病细胞的肺耐药蛋白 (L RP)表达情况 ,同时体外应用 MTT方法观察了所有患儿的白血病细胞对柔红霉素 (DNR)化疗的敏感性。结果 :2 7例初治患儿的 L RP表达率为 18.5 % ,2 1例复发及难治患儿的 L RP表达率为 6 6 .7% ,两者比较 P<0 .0 1。在 2 7例初治患儿组中 ,L RP表达阴性者对 DNR的敏感率为 86 .4 % ,L RP表达阳性者为 2 0 % ,两者比较 P<0 .0 1;在 2 1例复发及难治患儿中 ,L RP表达阴性者对 DNR敏感率为 2 8.6 % ,L RP表达阳性者为 2 1.4 % ,两者比较 P>0 .0 5。在 2 7例初治组患儿中 ,L RP表达阴性者的 CR率为 90 .9% ,L RP表达阳性者为 6 0 % ,两者比较 P<0 .0 1;在 2 1例复发及难治患儿中 ,L RP表达阴性者的 CR率为 4 2 .9% ,L RP表达阳性者为 5 0 % ,两者比较 P>0 .0 5。认为 L RP可能是产生多药耐药 (MDR)的另外一个重要因素 相似文献
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耐多药相关蛋白在人非小细胞肺癌组织中的表达 总被引:4,自引:0,他引:4
目的 检测人非小细胞肺癌组织中耐多药相关蛋白(MRP) 的表达,探讨其与瘤组织学类型、分化程度、临床分期及预后的关系。方法 采用免疫组化方法及逆转录聚合酶链反应(RTPCR)技术,分别检测了92 份人非小细胞肺癌石蜡组织中MRP的表达及16 份人非小细胞肺癌新鲜组织中MRP基因的表达。结果 92 份人非小细胞肺癌组织中( 鳞癌43 例,腺癌49 例)MRP表达阳性检出率为54%(50/92) ,16 份人非小细胞肺癌组织中MRP基因表达阳性检出率为31% (5/16)。MRP在腺癌中的表达阳性率明显高于鳞癌( P< 0-05) ,MRP表达与瘤分化程度、肿瘤大小及淋巴结转移无显著相关。MRP阳性患者术后5 年生存率为16% (8/50),MRP 阴性患者术后5 年生存率为52% (22/42) ,二者经统计学处理,差异有显著性( P< 0-05)。MRP阳性患者术后5 年生存率有随其瘤组织中该蛋白表达阳性程度的增加而降低之趋势。结论 非小细胞肺癌患者瘤组织中MRP的表达与瘤组织学类型及预后明显相关。 相似文献
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Feng Yan Xiao-Min Wang Chao Pan Quan-Ming Ma 《World journal of gastroenterology : WJG》2009,15(12):1443-1451
AIM: To study the expression and phosphorylation of extracellular signal-regulated kinase (ERK) i and ERK2 in multidrug resistant (MDR) hepatocellular carcinoma (HCC) cells.
METHODS: MDR HCC cell lines, HepG2/adriamycin (ADM) and SMMC7721/ADM, were developed by exposing parental cells to stepwise increasing concentrations of ADM. MTT assay was used to determine drug sensitivity. Flow cytometry was employed to analyze cell cycle distribution and measure cell P-glycoprotein (P-gp) and multidrug resistant protein 1 (MRP1) expression levels. ERK1 and ERK2 mRNA expression lev-ls were measured by quantitative real-time PCR (QRTPCR). Expression and phosphorylation of ERK1 and ERK2 were analyzed by Western blot.
RESULTS: MTT assay showed that HepG2/ADM andSMMC7721/ADM were resistant not only to ADM, but also to multiple anticancer drugs. The P-gp expression was over 10-fold higher in HepG2/ADM cells than in HepG2 cells (8.92% ±0.22% vs 0.88% ± 0.05%, P 〈 0.001) and over 4-fold higher in SMMC7721/ADM cells than in SMMC7721 cells (7.37% ± 0.26% vs 1.74% ± 0.25%, P 〈 0.001). However, the MRP1 expression was not significantly higher in HepG2/ADM and SMMC7721/ADM cells than in parental cells. In addition, the percentage of MDR HepG2/ADM and SMMC7721/ADM cells was significantly decreased in the G0/G1 phase and increased in the the S phase or G2/M phase. QRT-PCR analysis demonstrated that the ERK1 and ERK2 mRNA expression increased apparently in HepG2/ADM cells and decreased significantly in SMMC7721/ADM cells. Compared with the expression of parental cells, ERK1 and ERK2 protein expressions were markedly decreased in SMMC7721/ADM cells. However, ERK2 protein expression was markedly increased while ERK1 protein expression had no significant change in HepG2/ADM cells. Phosphorylation of ERK1 and ERK2 was markedly decreased in both HepG2/ADM and SMMC7721/ADM MDR cells.
CONCLUSION: ERK1 and ERK2 activities are downregulated in P-gp-mediated MDR HCC cells. ERK1 or ERK2 might be a potential drug target for circumventing MDR HCC cells, 相似文献
METHODS: MDR HCC cell lines, HepG2/adriamycin (ADM) and SMMC7721/ADM, were developed by exposing parental cells to stepwise increasing concentrations of ADM. MTT assay was used to determine drug sensitivity. Flow cytometry was employed to analyze cell cycle distribution and measure cell P-glycoprotein (P-gp) and multidrug resistant protein 1 (MRP1) expression levels. ERK1 and ERK2 mRNA expression lev-ls were measured by quantitative real-time PCR (QRTPCR). Expression and phosphorylation of ERK1 and ERK2 were analyzed by Western blot.
RESULTS: MTT assay showed that HepG2/ADM andSMMC7721/ADM were resistant not only to ADM, but also to multiple anticancer drugs. The P-gp expression was over 10-fold higher in HepG2/ADM cells than in HepG2 cells (8.92% ±0.22% vs 0.88% ± 0.05%, P 〈 0.001) and over 4-fold higher in SMMC7721/ADM cells than in SMMC7721 cells (7.37% ± 0.26% vs 1.74% ± 0.25%, P 〈 0.001). However, the MRP1 expression was not significantly higher in HepG2/ADM and SMMC7721/ADM cells than in parental cells. In addition, the percentage of MDR HepG2/ADM and SMMC7721/ADM cells was significantly decreased in the G0/G1 phase and increased in the the S phase or G2/M phase. QRT-PCR analysis demonstrated that the ERK1 and ERK2 mRNA expression increased apparently in HepG2/ADM cells and decreased significantly in SMMC7721/ADM cells. Compared with the expression of parental cells, ERK1 and ERK2 protein expressions were markedly decreased in SMMC7721/ADM cells. However, ERK2 protein expression was markedly increased while ERK1 protein expression had no significant change in HepG2/ADM cells. Phosphorylation of ERK1 and ERK2 was markedly decreased in both HepG2/ADM and SMMC7721/ADM MDR cells.
CONCLUSION: ERK1 and ERK2 activities are downregulated in P-gp-mediated MDR HCC cells. ERK1 or ERK2 might be a potential drug target for circumventing MDR HCC cells, 相似文献