Background and objective: It has been proven that telomerase activation correlates with the carcinogenesis, aggressiveness and turnover of lung cancer. Telomerase is one of the improtant molecular biomarkers for diagnosis and targeting therapy in lung cancer. The aim of this study is to investigate the diagnostic value of the combined determination of telomerase activity in induced sputum, pleural effusion and fiberobronchoscopic biopsy in lung cancer patients.
Methods: The technique of TRAP (telomeric repeat amplification protocal)-PCR-ELISA was employed to detect telomease levels of induced sputum, pleural effusion and fiberobronchoscopic biopsy in 80 lung cancer patients with pleural effusion and 50 benign pulmonary disease patients with pleural effusion.
Results: Telomemse levels of induced sputum, pleural effusion and fiberobronchoscopic biopsy were all significantly higher in patients with lung cancer than those with benign pulmonary disease (P < 0.001). There was no significant difference in the level of telomerase activity between different pathologic types (P > 0.05). The sensitivity of induced sputum, pleural effusion and fiberobronchoscopic biopsy were 62.5% (50/80), 46.3% (37/80) and 60.0% (48/80), respectively. The specificity were 72.0% (36/50), 66.0% (33/50) and 70.0% (35/50), respectively. The overall accuracy were 66.2% (86/130), 53.8% (70/130) and 63.8% (83/130), respectively. The sensitivity, specificity and overall accuracy of combined induced sputum, pleural effusion and fiberobronchoscopic biopsy were 85.0% (68/80), 78.0% (39/50) and 82.3% (107/130), respectively. The sensitivity of telomease level in combined detection for diagnosis of lung cancer was much higher than that in single sample detection (P < 0.01).
Conclusion: The sensitivity of telomease activity in combined three samples was the highest. It can further improve the accuracy for the diagnosis of lung cancer with pleural effusion.
背景与目的: 已有的研究表明, 端粒酶的异常活化与肺癌的发生、发展及转归密切相关, 端粒酶是目前已知广谱的肿瘤分子标记物, 是诊断和治疗肺癌的重要分子标志物之一。本研究旨在探讨诱导痰、胸水和纤维支气管镜活检组织中端粒酶活性的联合检测对肺癌的诊断价值。
方法: 对80例肺癌伴胸水患者和50例肺部良性病变伴胸水患者, 应用TRAP-PCR-ELISA方法分别检测其诱导痰、胸水和纤维支气管镜活检组织中端粒酶的活性。
结果: 肺癌伴胸水患者诱导痰、胸水和纤维支气管镜活组织中端粒酶的活性均明显高于肺部良性病变伴胸水患者(P < 0.001), 不同病理类型的肺癌患者间三种标本的端粒酶活性差异无统计学意义(P > 0.05)。诱导痰、胸水和纤维支气管镜活组织中端粒酶活性的检测对肺癌的诊断敏感性分别为62.5%(50/80)、46.3%(37/80)和60.0%(48/80);特异性分别为72.0%(36/50)、66.0%(33/50)和70.0%(35/50);准确性分别为66.2%(86/130)、53.8%(70/130)和63.8%(83/130);三项联合检测的敏感性、特异性和准确性分别为85.0%(68/80)、78.0%(39/50)和82.3%(107/130), 其中敏感性与单独诱导痰、胸水和纤维支气管镜活组织的敏感性差异有统计学意义(P < 0.01)。
结论: 诱导痰、胸水和纤维支气管镜活组织端粒酶活性的联合检测具有更高的敏感性, 可以提高肺癌的诊断率。