Third Affiliated Hospital of Shenzhen University, Shenzhen, Guangdong, China.
Institute of Urinary Surgery, Shenzhen University, Shenzhen, Guangdong, China.
Artif Cells Nanomed Biotechnol. 2019 Dec;47(1):4266-4272. doi: 10.1080/21691401.2019.1687491.
Bladder cancer is a common malignant tumour with high recurrence rate. Cytokeratin 19 fragments (Cyfra21-1) in urine has been regarded as a promising biomarker for the prognosis and diagnosis of bladder cancer due to the relevance of its high urinary level to the bladder cancer patients. However, currently detection methods of Cyfra21-1 have their limits, such as complicated steps, limited sensitivity or unsatisfying specificity. In this study, we developed a novel time-resolved fluoroimmuno test strip by using europium chelate microparticle (Eu-CM). Detection was performed in simple steps by carrying drops of sample into the well of the test strip, waiting for 15 min and inserting the strip into a fluorescence strip reader for quantitation. The standard curve equation of the test strip was = 0.0177 + 0.01 ( = .9993). In the analysis of human urine samples ( = 115), it demonstrated a good performance (accuracy: CV < 10%, AUC: 0.989). With the cut-off value of 81 ng/mL, the sensitivity and specificity for bladder cancer were 92.86 and 100%, respectively. In comparison to ELISA and electrochemiluminescence methods, the Eu-CM based time-resolved fluoroimmuno test strip provided a rapid, sensitive and reliable method for monitoring bladder cancer. It may be applied as a non-invasive approach for in point-of-care for bladder cancer detection.
膀胱癌是一种常见的恶性肿瘤,复发率较高。尿液中的细胞角蛋白 19 片段(Cyfra21-1)因其高尿水平与膀胱癌患者的相关性,被认为是膀胱癌预后和诊断的有前途的生物标志物。然而,目前 Cyfra21-1 的检测方法存在一些局限性,如步骤复杂、灵敏度有限或特异性不令人满意。在本研究中,我们使用铕螯合物微粒子(Eu-CM)开发了一种新型时间分辨荧光免疫测试条。通过将样品滴入测试条的孔中,简单地进行检测,等待 15 分钟,然后将测试条插入荧光条读取器中进行定量。测试条的标准曲线方程为 y=0.0177+0.01(r=0.9993)。在分析人尿液样本(n=115)时,它表现出良好的性能(准确性:CV<10%,AUC:0.989)。以 81ng/mL 为截断值,膀胱癌的灵敏度和特异性分别为 92.86%和 100%。与 ELISA 和电化学发光法相比,基于 Eu-CM 的时间分辨荧光免疫测试条为监测膀胱癌提供了一种快速、灵敏和可靠的方法。它可能作为一种非侵入性方法应用于膀胱癌的即时检测。