Clinica Chimica Acta:基于薄膜干涉术的无标记免疫分析法,用于检测daratumumab干扰素对血清蛋白电泳的影响

2020-04-12 MedSci原创 MedSci原创

Daratumumab(DARA)是用于治疗多发性骨髓瘤(MM)的人类抗CD38IgG1-κ单克隆抗体药物。虽然血清蛋白电泳(SPEP)是诊断和监测MM患者的重要方法,但DARA可能在&g

Daratumumab(DARA)是用于治疗多发性骨髓瘤(MM)的人类抗CD38IgG1-κ单克隆抗体药物。虽然血清蛋白电泳(SPEP)是诊断和监测MM患者的重要方法,但DARA可能在γ区以单条带出现,并干扰SPEP结果的解释。 一种检测干扰的方法是测量血清样品中DARA的量,并评估其对SPEP结果的影响。 基于无标记技术的免疫测定,即无标记免疫测定(LFIA),可以实现实时免疫测定,而无需将报告分子(酶,荧光团等)附着到免疫复合物上。 所记录的免疫复合物形成的时间过程允许对初始结合速率进行定量,这有助于在几分钟内进行快速测量。基于薄膜干涉仪(TFI)技术,建立了快速LFIA定量分析血清样品中DARA的方法。本研究对基于TFI的DARA LFIA进行了不精确(C V)、精度、定量极限(L OQ)和分析测量范围(AMR)的验证。 对LFIA的干扰用一组蛋白质样本以及溶血、脂血症和黄疸临床样本进行评估。

基于TFI的LFIA对DARA的准确度为6.5%~10.7%(运行内CV),运行间CV为7.4%~11.6%(运行间CV),偏差为-2.1%~10.1%。LOQ为10 μg/ml(n = 4,CV为9.8%),AMR从LOQ到1000 μg/ml之间。使用LFIA对37份提交SPEP检测的患者样本进行了测定。LFIA结果与病历中记录的DARA使用史100%一致。

研究结果表明,基于TFI的LFIA成功地在血清样品中准确识别DARA,并可用于SPEP测试中识别DARA干扰。 这项工作证明了无标签技术,特别是TFI技术,对临床诊断需求的适用性。 鉴于测试过程的简单性和速度,TFI技术为临床样本中蛋白质的测量提供了一种独特的测试方法。

原始出处:

Yiqi Ruben Luo,Indrani Chakraborty,A thin-film interferometry-based label-free immunoassay for the detection of daratumumab interference in serum protein electrophoresis

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    2020-10-09 windight
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    2020-05-25 snf701207
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    2020-04-14 yese