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基于荧光纳米球的免疫层析试验条快速定量检测尿 Cyfra21-1 用于膀胱癌的诊断和预后监测。

Rapid and quantitative detection of urinary Cyfra21-1 using fluorescent nanosphere-based immunochromatographic test strip for diagnosis and prognostic monitoring of bladder cancer.

机构信息

Third Affiliated Hospital of Shenzhen University, Shenzhen, Guangdong, China.

Institute of Urinary Surgery, Shenzhen University, Shenzhen, Guangdong, China.

出版信息

Artif Cells Nanomed Biotechnol. 2019 Dec;47(1):4266-4272. doi: 10.1080/21691401.2019.1687491.

Abstract

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.

摘要

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。

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