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On-the-fly rapid immunoassay for neonatal sepsis diagnosis: C-reactive protein accurate determination using magnetic graphene-based micromotors.
Biosensors and Bioelectronics ( IF 12.6 ) Pub Date : 2020-03-19 , DOI: 10.1016/j.bios.2020.112156
Águeda Molinero-Fernández 1 , Luis Arruza 2 , Miguel Ángel López 3 , Alberto Escarpa 3
Affiliation  

Based on the exceptional and new opened biosensing possibilities of self-propelled micromotors, a micromotor-based immunoassay (MIm) has smartly been designed for C-reactive protein (CRP) determination in plasma of preterm infants with sepsis suspicion. The design of the micromotors involved the electrosynthesis of a carbon-based outer layer (for antibody functionalization), an intermediate Ni layer (for magnetic guidance and stopped flow operations) and PtNPs inner catalytic layer (for catalytic bubble propulsion). Micromotors biofunctionalization on the outer layer (using carbon black (CB), reduced graphene oxide (rGO) and multi-walled carbon nanotubes (MWCNTs), and biocompatible propulsion capabilities, were carefully studied. Magnetic rGO/Ni/PtNPs micromotors exhibited the most efficient and reproducible (CV = 9%) anti-CRP functionalization, controlled stopped-flow operations as well as efficient bubble propulsion (1% H2O2, 1,5% NaCh, speed 140 μm s-1). Analytical performance of MIm was excellent, allowing the direct (without dilution), sensitive (LOD = 0.80 μg/mL), and accurate CRP determination (Er = 1%) in hardly available preterm babies' plasma samples with suspected sepsis using very low volumes (<10 μL) and in just 5 min of on-the-fly bioassay. Overall, the results obtained allowed the fast and reliable sepsis diagnostics in preterm babies' individuals with suspected sepsis, not only proving the usefulness of the approach as its potential utilization as point-of-care device for clinical analysis but drawing new horizons in extremely low sample volumes-based diagnostics.

中文翻译:

快速诊断新生儿败血症的快速免疫分析法:使用基于石墨烯的微型马达精确测定C反应蛋白。

基于自行式微型马达的特殊和全新的生物传感可能性,巧妙地设计了一种基于微型马达的免疫测定(MIm)方法,用于可疑败血症的早产儿血浆中C反应蛋白(CRP)的测定。微型马达的设计涉及碳基外层(用于抗体功能化),中间镍层(用于磁导和停止流操作)和PtNPs内部催化层(用于催化气泡推进)的电合成。仔细研究了外层微电机的生物功能化(使用炭黑(CB),氧化石墨烯(rGO)和多壁碳纳米管(MWCNT)以及具有生物相容性的推进能力),磁性rGO / Ni / PtNPs微电机表现出最高的效率和可重复的(CV = 9%)抗CRP功能化,受控的停止流操作以及有效的气泡推进(1%H2O2、1.5%NaCh,速度140μms-1)。MIm的分析性能极佳,可在极少量的疑似脓毒症的几乎不可用的早产儿血浆样品中直接(无稀释),灵敏(LOD = 0.80μg/ mL)和准确的CRP测定(Er = 1%) (<10μL)且仅需5分钟的实时生物测定。总体而言,所获得的结果可对疑似败血症的早产儿进行快速,可靠的败血症诊断,不仅证明了该方法作为临床分析的即时医疗设备的潜在用途,而且在极低的水平上开辟了新的前景。基于样本量的诊断。速度140μms-1)。MIm的分析性能极佳,可在极少量的疑似脓毒症的几乎不可用的早产儿血浆样品中直接(无稀释),灵敏(LOD = 0.80μg/ mL)和准确的CRP测定(Er = 1%) (<10μL)且仅需5分钟的实时生物测定。总体而言,所获得的结果可对疑似败血症的早产儿进行快速,可靠的败血症诊断,不仅证明了该方法作为临床分析的即时医疗设备的潜在用途,而且在极低的水平上开辟了新的前景基于样本量的诊断。速度140μms-1)。MIm的分析性能极佳,可在极少量的疑似脓毒症的难得早产儿血浆样品中直接(无需稀释),灵敏(LOD = 0.80μg/ mL)和准确的CRP测定(Er = 1%) (<10μL)且仅需5分钟的实时生物测定。总体而言,所获得的结果可对疑似败血症的早产儿进行快速,可靠的败血症诊断,不仅证明了该方法作为临床分析的即时医疗设备的潜在用途,而且在极低的水平上开辟了新的前景基于样本量的诊断。极少的体积(<10μL)且仅需5分钟的实时生物测定,即可在几乎没有的怀疑败血症的早产儿血浆样品中进行准确的CRP测定(Er = 1%)。总体而言,所获得的结果可对疑似败血症的早产儿进行快速,可靠的败血症诊断,不仅证明了该方法作为临床分析的即时医疗设备的潜在用途,而且在极低的水平上开辟了新的前景。基于样本量的诊断。极少的体积(<10μL)且仅需5分钟的实时生物测定,即可在几乎没有的怀疑败血症的早产儿血浆样品中进行准确的CRP测定(Er = 1%)。总体而言,所获得的结果可对疑似败血症的早产儿进行快速,可靠的败血症诊断,不仅证明了该方法作为临床分析的即时医疗设备的潜在用途,而且在极低的水平上开辟了新的前景。基于样本量的诊断。
更新日期:2020-03-20
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