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目的:初步探讨柯萨奇病毒-腺病毒受体(Coxsackie and adenovirus receptor,CAR)与人肺鳞状细胞癌及腺癌发生、发展的关系,为设计腺病毒载体对肺癌进行基因治疗的方案提供理论依据。方法:采用免疫组织化学方法检测112例肺癌(包括鳞状细胞癌65例,腺癌47例)组织中CAR的表达情况,利用统计学方法(SPSS10.0软件)分析CAR的表达在鳞状细胞癌、腺癌以及癌旁正常肺组织中有否差异。结果:正常肺组织中仅有少量CAR的表达。两类型肺癌分别与癌旁组织CAR的表达差别有统计学意义(P〈0.01),在鳞状细胞癌中CAR的表达较癌旁组织提高34.75%,在腺癌中CAR的表达较癌旁组织提高38.30%。其中,鳞状细胞癌的CAR阳性率为43.08%,腺癌的阳性率为70.21%,两类型肺癌间CAR表达的阳性率差别亦有统计学意义(P〈0.01)。但CAR的表达在肺鳞状细胞癌不同组织学分级中(Ⅰ~Ⅲ级)的差别未有统计学意义(P〉0.05)。此外,我们发现在肺腺癌中所包含的细支气管肺泡癌部分几乎都有CAR的表达。结论:肺癌组织(鳞状细胞癌和腺癌)CAR的表达普遍提高,提示CAR与肺癌的发生、发展有一定的联系,并且与肺腺癌的形成及发展的关系更为密切,因此为进一步实现用腺病毒载体对肺癌进行基因治疗提供了理论基础。 相似文献
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目的 探讨非小细胞肺癌 (NSCLC)环氧化酶 2 (cyclooxygenase 2 ,COX 2 )蛋白表达的临床意义及与bcl 2的关系。方法 免疫组织化学法检测 5 3例NSCLC癌组织及配对癌旁正常组织COX 2蛋白的表达及定位 ,Western印迹法半定量检测COX 2蛋白表达水平 ;免疫组织化学法检测癌组织bcl 2蛋白表达。结果 肺癌组织COX 2蛋白表达高于癌旁正常组织 (P <0 .0 1) ,腺癌高于鳞癌 (P <0 .0 5 ) ,但与患者的年龄、性别、TNM分期及肿瘤组织的分化程度无明显相关 (P >0 .0 5 )。COX 2与bcl 2蛋白表达相关 (P <0 .0 5 )。结论 COX 2在肺癌组织尤其是肺腺癌中表达上调 ,COX 2与bcl 2在NSCLC发展中可能起协同作用。 相似文献
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目的探讨抑癌基因PRDM1在肺癌组织中的表达情况及其意义。方法45例肺癌患者中,鳞状细胞癌20例、腺癌15例、小细胞肺癌10例。用免疫组织化学方法,研究肺癌石蜡包埋组织中PRDM1蛋白的表达情况;激光微切割技术捕捉冰冻肺癌组织中的肿瘤细胞,抽提RNA、采用逆转录聚合酶链式反应(RT-PCR)技术研究PRDM1基因表达;Western blot技术研究冰冻肺癌组织中PRDM1蛋白表达。结果(1)免疫组织化学结果表明鳞状细胞癌、腺癌、小细胞肺癌患者的PRDM1蛋白阳性率分别为90.0%(18/20)、13.3%(2/15)和0(0/10),统计学分析显示,PRDM1蛋白主要在鳞状细胞癌患者中表达(P<0.01)。(2)激光微切割技术联合RT-PCR证实,PRDM1基因特异表达于鳞状细胞癌患者中,腺癌和小细胞肺癌中未发现其基因表达。进一步研究发现,鳞状细胞肺癌患者中,PRDM1基因的DNA结合区表达缺陷。Western blot在鳞状细胞肺癌组织中检测出约70 000的异常PRDM1蛋白。结论PRDM1在鳞状细胞肺癌中优势表达,可作为肺癌诊断的新的肿瘤标志;鳞状细胞肺癌中PRDM1在转录和蛋白水平上均存在异常,失去了抑癌基因的正常功能,可能成为新的研究治疗靶点。 相似文献
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肺癌细胞表面CAR表达水平与腺病毒转基因治疗的可能性研究 总被引:1,自引:0,他引:1
目的:研究肺癌细胞表面柯萨奇腺病毒受体(CAR)表达水平与基因治疗的可能性.方法:用特异性CAR72抗体通过免疫组织化学Envision法在检测CAR在肺癌组织细胞中的表达水平.结果:在32例鳞癌中有25例CAR高表达、5例小细胞肺癌全部高表达,相反,CAR在22例腺癌中仅6例高水平表达.在非恶性肺泡上皮中为阴性.结论:以腺病毒血清型5为载体的基因治疗适合于鳞癌和非小细胞肺癌,而不适合于大多数腺癌. 相似文献
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Lei-na SUN An-kang GU Zhao-li CHEN Zhong-li ZHAN Qian WANG Jun-wen LI Bao-cun SUN 《中国肿瘤临床(英文版)》2010,7(1)
OBJECTIVE To explore the relationship between CAR and the development of human lung cancer, as well as to provide the basis for the clinical treatment of lung cancer using an adenovirus vector-based gene therapy.METHODS CAR expression was assessed immunohisto-chemically in tumoral, paraneoplastic and normal samples from 112 lung cancer patients. At the same time, the mRNA and protein expression of CAR in 32 cases were determined by RT-PCR and Western blot. The relationship between CAR expression and clinicopathologic parameters was statistically analyzed.RESULTS There was no expression of CAR in normal lung tissue but a little in paraneoplastic tissue. The positive rate was 43% in squamous cell carcinoma, and 70% in adenocarcinoma.Both were much significantly higher than that in paraneoplastic tissue. The CAR expression level in adenocarcinoma was higher than that in squamous cell cancer, mRNA expression by RT-PCR and protein expression by Western blot were consistent with immunohistochemistry results.CONCLUSION CAR is overexpressed in human lung cancer,especially in adenocarcinoma. This data offer the reliable basis for adenovirus-mediated gene therapy of lung cancer; more important, CAR may take part in the formation or development of lung cancer; this may be exploitable for the development of antibody-directed therapy in human lung cancer. 相似文献
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Qian Wang Zhongli Zhan Yi Pan Junwen Li 《中国肿瘤临床(英文版)》2007,4(4):273-276
OBJECTIVE To study the relationship between the coxsackie and adenovirus receptor (CAR) and the development of human lung cancer. To optimize adenovirus vector-based gene therapy.
METHODS The expression of CAR in 112 cases of lung cancer was examined using immunohistochemistry. At the same time, the relationship between CAR expression and clinicopathologic characteristics was analyzed,
RESULTS :lhere is a little expression of CAR in normal lung tissue. Compared with paraneoplastic epithelial tissue of the lung, the expression of CAR is generally up-regulated in tumor tissues showing a significant dif- ference (P〈0.01). The positive rate of CAR expression in squamous cell carcinoma was 43.1%, and in adenocarcinoma 70.2%, with the difference between the two rates being statistically significant (P〈0.01). Compared to the paraneoplastic tissues, the difference in CAR positive expression was 35.4% for squamous cell carcinoma and 38.3% for adenocarcinoma. But the difference in different stages of squamous cell carcinoma had no statistical significance (P〉0.05). However, the expression of CAR was at a high level in the bronchioalveolar carcinomas as 80.4% were CAR positive. This research showed that there was a specially high expression of CAR in adenocarcinomas.
CONCLUSION CAR is expressed in human lungs at a low level and up-regulated in the tumor tissues, suggesting that there is a relationship between adenocarcinoma and CAR. This research provides a basis for planning a regimen of gene therapy using an adenovirus vector, 相似文献
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Zhaoli Chen Qian Wang Jingran Sun Ankang Gu Min Jin Zhiqiang Shen Zhigang Qiu Jingfeng Wang Xinwei Wang Zhongli Zhan Jun-Wen Li 《Tumour biology》2013,34(1):17-24
The aim of this study is to elucidate the relation between expression of coxsackie and adenovirus receptor (CAR) and formation of lung cancer. We investigated the expression of CAR by immunohistochemistry, Western blot and real-time RT-PCR in 120 lung cancers. We found that CAR expression in tumor tissues was significantly higher than that in normal lung tissues. CAR expression had a correlation with the histological grade of lung squamous cell carcinoma; however, there was no relationship between the CAR expression and the other clinical pathological features. In vitro, silencing or overexpression of CAR could significantly inhibit or promote colony formation, cell adhesion, and invasion in A549 cells. Our findings demonstrated that CAR may play an essential role in the formation of lung cancer. 相似文献
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《中国肿瘤临床(英文版)》2007,4(4)
OBJECTIVE To study the relationship between the coxsackie and adenovirus receptor (CAR) and the development of human lung cancer. To optimize adenovirus vector-based gene therapy. METHODS The expression of CAR in 112 cases of lung cancer was examined using immunohistochemistry. At the same time, the relationship between CAR expression and clinicopathologic characteristics was analyzed. RESULTS There is a little expression of CAR in normal lung tissue. Compared with paraneoplastic epithelial tissue of the lung, the expression of CAR is generally up-regulated in tumor tissues showing a significant dif- ference (P<0.01). The positive rate of CAR expression in squamous cell carcinoma was 43.1%, and in adenocarcinoma 70.2%, with the difference between the two rates being statistically significant (P<0.01). Compared to the paraneoplastic tissues, the difference in CAR positive expression was 35.4% for squamous cell carcinoma and 38.3% for adenocarcinoma. But the difference in different stages of squamous cell carcinoma had no statistical significance (P>0.05). However, the expression of CAR was at a high level in the bronchioalveolar carcinomas as 80.4% were CAR positive. This research showed that there was a specially high expression of CAR in adenocarcino- mas. CONCLUSION CAR is expressed in human lungs at a low level and up-regulated in the tumor tissues, suggesting that there is a relationship between adenocarcinoma and CAR. This research provides a basis for plan- ning a regimen of gene therapy using an adenovirus vector. 相似文献
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