Continuous Real-Time Detection of Serotonin Using an Aptamer-Based Electrochemical Biosensor.

Continuous Real-Time Detection of Serotonin Using an Aptamer-Based Electrochemical Biosensor.
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DOI:
10.3390/bios13110983
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发表时间:
2023-11-13
期刊:
Biosensors
影响因子:
--
通讯作者:
--
中科院分区:
其他
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5-羟色胺(5-HT)是一种重要的神经递质,参与许多神经元的功能,5-HT的缺失与一些精神疾病有关。血清素在细胞外空间中的快速释放和清除、低分析物浓度和大量干扰物质使得血清素的检测具有挑战性。本工作提出了一种基于电化学适体的生物传感平台,可以连续监测5-HT具有高灵敏度和选择性。我们的电化学传感器显示了约1分钟的响应时间,在连续监测中使用单频EIS(电化学阻抗谱)技术的血清素浓度的阶跃变化。所开发的传感平台能够在连续样品流体流中检测25-150 nM范围内的5-HT,检测限(LOD)为5.6 nM。该电化学传感器对具有相似化学结构和氧化还原电位的其他物种,包括多巴胺(DA)、去甲肾上腺素(NE)、L-色氨酸(L-TP)、5-羟基吲哚乙酸(5-HIAA)和5-羟基色氨酸(5-HTP)表现出有希望的选择性。所提出的传感平台能够实时连续地在纳摩尔范围内实现高选择性,从而展示了在基于器官芯片或大脑芯片的平台中监测来自神经元的5-羟色胺的潜力。
Serotonin (5-HT) is a critical neurotransmitter involved in many neuronal functions, and 5-HT depletion has been linked to several mental diseases. The fast release and clearance of serotonin in the extracellular space, low analyte concentrations, and a multitude of interfering species make the detection of serotonin challenging. This work presents an electrochemical aptamer-based biosensing platform that can monitor 5-HT continuously with high sensitivity and selectivity. Our electrochemical sensor showed a response time of approximately 1 min to a step change in the serotonin concentration in continuous monitoring using a single-frequency EIS (electrochemical impedance spectroscopy) technique. The developed sensing platform was able to detect 5-HT in the range of 25–150 nM in the continuous sample fluid flow with a detection limit (LOD) of 5.6 nM. The electrochemical sensor showed promising selectivity against other species with similar chemical structures and redox potentials, including dopamine (DA), norepinephrine (NE), L-tryptophan (L-TP), 5-hydroxyindoleacetic acid (5-HIAA), and 5-hydroxytryptophan (5-HTP). The proposed sensing platform is able to achieve high selectivity in the nanomolar range continuously in real-time, demonstrating the potential for monitoring serotonin from neurons in organ-on-a-chip or brain-on-a-chip-based platforms.
改善5-羟色胺快速扫描循环伏安法检测:新波形以减少电极结垢。
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