Improved calibration of electrochemical aptamer-based sensors.

Improved calibration of electrochemical aptamer-based sensors.
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DOI:
10.1038/s41598-022-09070-7
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发表时间:
2022-04-01
期刊:
影响因子:
4.6
通讯作者:
Plaxco KW
Plaxco KW
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Downs AM;Gerson J;Leung KK;Honeywell KM;Kippin T;Plaxco KW

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基于电化学适配子(EAB)的传感器支持对活体中的药物和代谢物进行实时、高频的原位测量,使其成为一种潜在的强大的研究和临床应用技术。在这里,我们探索使用EAB传感器进行量化,检查介质选择和温度对测量性能的影响。使用新鲜采集的、在体温下未稀释的全血作为我们的校准和测量条件,我们证明了对我们的试验床药物万古霉素的测量精度优于 ± 10%。比较在室温和体温下收集的滴定,我们发现,将校准曲线收集的温度与测量过程中使用的温度进行匹配,可以通过减少传感器增益和结合曲线中点的差异来改进量化。我们同样发现,由于血液年龄影响传感器的响应,在新收集的血液中进行校准可以提高量化。最后,我们演示了使用非血液代理介质来实现校准,而不需要采集新鲜的全血。
Electrochemical aptamer-based (EAB) sensors support the real-time, high frequency measurement of pharmaceuticals and metabolites in-situ in the living body, rendering them a potentially powerful technology for both research and clinical applications. Here we explore quantification using EAB sensors, examining the impact of media selection and temperature on measurement performance. Using freshly-collected, undiluted whole blood at body temperature as both our calibration and measurement conditions, we demonstrate accuracy of better than ± 10% for the measurement of our test bed drug, vancomycin. Comparing titrations collected at room and body temperature, we find that matching the temperature of calibration curve collection to the temperature used during measurements improves quantification by reducing differences in sensor gain and binding curve midpoint. We likewise find that, because blood age impacts the sensor response, calibrating in freshly collected blood can improve quantification. Finally, we demonstrate the use of non-blood proxy media to achieve calibration without the need to collect fresh whole blood.
DOI: 10.1021/acssensors.8b00278
发表时间: 2018-06-01
期刊: ACS SENSORS
影响因子: 8.9
作者:
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影响因子: --
作者:
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通讯作者: Plaxco KW