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A new ratiometric electrochemical immunoassay for reliable detection of nuclear matrix protein 22
Analytica Chimica Acta ( IF 5.7 ) Pub Date : 2019-12-01 , DOI: 10.1016/j.aca.2019.08.017 Ming Li 1 , Lei Jiao 2 , Siquan Liu 1 , Lianhua Zhang 3 , He Li 4
Analytica Chimica Acta ( IF 5.7 ) Pub Date : 2019-12-01 , DOI: 10.1016/j.aca.2019.08.017 Ming Li 1 , Lei Jiao 2 , Siquan Liu 1 , Lianhua Zhang 3 , He Li 4
Affiliation
Ratiometric signal transducing strategies can improve the precision of immunoassay, which possess the unique merits of spatial-resolved signal readout and self-correcting towards possible false positive results. In this work, a new ratiometric electrochemical immunosensor has been developed for reliable detection of Nuclear matrix protein 22 (NMP22). Bioinspired synthetic melanin nanospheres (SMNPs) were elaborately chosen for the following considerations: 1) SMNPs can supply good biocompatible biorecognition interface for antibody anchoring; 2) SMNPs can chelate a large amount of lead ions (Pb2+) and copper ions (Cu2+) to fabricate two spatial-resolved electrochemical signals with different response manners towards NMP22. SMNPs chelated with Pb2+ were used for the immobilization of captured primary anti-NMP22. And SMNPs chelated Cu2+ were employed to prepare signal labels after anchored with anti-NMP22 antibody. After sandwich-type immunoreaction, with the increasing concentration of NMP22, the stripping peak current of Pb2+ decreases while the stripping peak current of Cu2+ increases. Thus, ratiometric electrochemical signals could be provided for NMP22 detection. The immunosensor presented a linear concentration range from 0.013 U mL-1 to 6.7 U mL-1 with a limit of detection of 0.005 U mL-1 towards NMP22. Meanwhile, satisfactory reproducibility, stability and selectivity of the immunosensor were demonstrated.
中文翻译:
一种用于可靠检测核基质蛋白 22 的新型比率电化学免疫分析
比率信号转导策略可以提高免疫测定的精度,其具有空间分辨信号读出和对可能的假阳性结果进行自我校正的独特优点。在这项工作中,开发了一种新的比率电化学免疫传感器,用于可靠检测核基质蛋白 22 (NMP22)。精心选择仿生合成黑色素纳米球(SMNPs)是出于以下考虑:1)SMNPs可以为抗体锚定提供良好的生物相容性生物识别界面;2) SMNPs 可以螯合大量的铅离子 (Pb2+) 和铜离子 (Cu2+) 以制造两种对 NMP22 具有不同响应方式的空间分辨电化学信号。与 Pb2+ 螯合的 SMNP 用于固定捕获的初级抗 NMP22。并在锚定抗NMP22抗体后,采用SMNPs螯合Cu2+制备信号标记。夹心式免疫反应后,随着NMP22浓度的增加,Pb2+的溶出峰电流减小,Cu2+的溶出峰电流增大。因此,可以为 NMP22 检测提供比率电化学信号。免疫传感器呈现从 0.013 U mL-1 到 6.7 U mL-1 的线性浓度范围,对 NMP22 的检测限为 0.005 U mL-1。同时,证明了免疫传感器令人满意的重现性、稳定性和选择性。因此,可以为 NMP22 检测提供比率电化学信号。免疫传感器呈现从 0.013 U mL-1 到 6.7 U mL-1 的线性浓度范围,对 NMP22 的检测限为 0.005 U mL-1。同时,证明了免疫传感器令人满意的重现性、稳定性和选择性。因此,可以为 NMP22 检测提供比率电化学信号。免疫传感器呈现从 0.013 U mL-1 到 6.7 U mL-1 的线性浓度范围,对 NMP22 的检测限为 0.005 U mL-1。同时,证明了免疫传感器令人满意的重现性、稳定性和选择性。
更新日期:2019-12-01
中文翻译:
一种用于可靠检测核基质蛋白 22 的新型比率电化学免疫分析
比率信号转导策略可以提高免疫测定的精度,其具有空间分辨信号读出和对可能的假阳性结果进行自我校正的独特优点。在这项工作中,开发了一种新的比率电化学免疫传感器,用于可靠检测核基质蛋白 22 (NMP22)。精心选择仿生合成黑色素纳米球(SMNPs)是出于以下考虑:1)SMNPs可以为抗体锚定提供良好的生物相容性生物识别界面;2) SMNPs 可以螯合大量的铅离子 (Pb2+) 和铜离子 (Cu2+) 以制造两种对 NMP22 具有不同响应方式的空间分辨电化学信号。与 Pb2+ 螯合的 SMNP 用于固定捕获的初级抗 NMP22。并在锚定抗NMP22抗体后,采用SMNPs螯合Cu2+制备信号标记。夹心式免疫反应后,随着NMP22浓度的增加,Pb2+的溶出峰电流减小,Cu2+的溶出峰电流增大。因此,可以为 NMP22 检测提供比率电化学信号。免疫传感器呈现从 0.013 U mL-1 到 6.7 U mL-1 的线性浓度范围,对 NMP22 的检测限为 0.005 U mL-1。同时,证明了免疫传感器令人满意的重现性、稳定性和选择性。因此,可以为 NMP22 检测提供比率电化学信号。免疫传感器呈现从 0.013 U mL-1 到 6.7 U mL-1 的线性浓度范围,对 NMP22 的检测限为 0.005 U mL-1。同时,证明了免疫传感器令人满意的重现性、稳定性和选择性。因此,可以为 NMP22 检测提供比率电化学信号。免疫传感器呈现从 0.013 U mL-1 到 6.7 U mL-1 的线性浓度范围,对 NMP22 的检测限为 0.005 U mL-1。同时,证明了免疫传感器令人满意的重现性、稳定性和选择性。