Smartphone-based differential pulse amperometry system for real-time monitoring of levodopa with carbon nanotubes and gold nanoparticles modified screen-printing electrodes
| Autor: | Ning Xu, Jingjing Liu, Jingwen Zhu, Haoxuan Xu, Daizong Ji, Zhouyuanjing Shi, Zixiang Liu, Xiong-Jie Yu, Chen Cheng, Sze Shin Low, Tingkai Zhang, Qingjun Liu |
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| Rok vydání: | 2018 |
| Předmět: |
Models
Molecular Levodopa Materials science Parkinson's disease Biomedical Engineering Biophysics Metal Nanoparticles 02 engineering and technology Biosensing Techniques 01 natural sciences Antiparkinson Agents Limit of Detection Electrochemistry medicine Humans Electrodes Pulse (signal processing) Nanotubes Carbon 010401 analytical chemistry Detector Parkinson Disease General Medicine Electrochemical Techniques Equipment Design 021001 nanoscience & nanotechnology medicine.disease Amperometry 0104 chemical sciences Colloidal gold Electrode Screen printing Gold Smartphone Drug Monitoring 0210 nano-technology Biotechnology medicine.drug Biomedical engineering |
| Zdroj: | Biosensorsbioelectronics. 129 |
| ISSN: | 1873-4235 |
| Popis: | Parkinson's disease caused by lack of dopamine in brain is a common neurodegenerative disorder. The traditional treatment is to replenish levodopa since it could pass through blood brain barrier and form dopamine. However, its accumulation can cause patients’ movement disorders and uncontrollable emotion. Therefore, it is critical to control the levodopa dosage accuracy to improve the curative effect in clinical. In this study, a smartphone-based electrochemical detection system was developed for rapid monitoring of levodopa. The system involved a disposable sensor, a hand-held electrochemical detector, and a smartphone with designed application. Single-wall carbon nanotubes and gold nanoparticles modified screen-printed electrodes were used to convert and amplify the electrochemical current signals upon presence of levodopa molecules. The electrochemical detectors were used to generate electrochemical excitation signals and detect the resultant currents. Smartphone was connected to the detector, which was used to control the detector, calculate data, and plot graph in real-time. The smartphone-based differential pulse amperometry system was demonstrated to monitor levodopa at concentrations as low as 0.5 µM in human serum. Furthermore, it has also been verified to be able to distinguish levodopa from other representative substances in the body. Therefore, its performance was more sensitive and rapid than electrochemical workstation. With these advantages, the system can be used in the field of point-of-care testing (POCT) to detect levodopa and provide the possibility to solve clinical demand for levodopa detection. |
| Databáze: | OpenAIRE |
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