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Recent advances in microfluidic single-cell analysis and its applications in drug development. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116796] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Hu T, Wu Z, Sang W, Ding B, Chen K, Li X, Shen Y, Ni Z. A sensitive electrochemical platform integrated with a 3D graphene aerogel for point-of-care testing for tumor markers. J Mater Chem B 2022; 10:6928-6938. [PMID: 35983886 DOI: 10.1039/d2tb00846g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Point-of-care testing (POCT) of tumor markers, such as alpha-fetoprotein (AFP) and carcinoembryonic antigen (CEA), can be used for the early diagnosis of cancer. In this paper, a highly sensitive electrochemical immuno-biochip based on a porous three-dimensional graphene aerogel (3D-GA) is presented to detect multiple tumor biomarkers and exosomes. The 3D-GA was prepared via in situ chemical reduction of graphene oxide with L-ascorbic acid and then dehydration by freeze-drying. The obtained 3D-GA exhibits a large specific surface area of 125.3 m2 g-1 due to its intrinsic 3D porous architecture. After chemical activation and modification of the 3D-GA, the prepared microfluidic biochip can be used for detecting various tumor markers in liquid samples via electrochemical impedance spectroscopy (EIS). The electrochemical platform with only 5 μL sample achieved a broad detection range of 1.0 × 10-8-1.0 × 10-5 and 1.0 × 10-8-5.0 × 10-4 mg mL-1 for AFP and CEA, respectively, and a low limit of detection (LOD) of 7.9 and 6.2 pg mL-1 for AFP and CEA respectively, which was much better than the outcomes of many other reports. Moreover, the biochip determined the tumor cell-derived exosomes with a low LOD of 10 particles per μL in the PBS solution and an average recovery rate of ∼90% in the diluted serum.
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Affiliation(s)
- Tao Hu
- Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, School of Mechanical Engineering, Southeast University, Jiulong Lake Campus, Nanjing 211189, China.
| | - Zihao Wu
- Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, School of Mechanical Engineering, Southeast University, Jiulong Lake Campus, Nanjing 211189, China.
| | - Wen Sang
- Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, School of Mechanical Engineering, Southeast University, Jiulong Lake Campus, Nanjing 211189, China.
| | - Bo Ding
- Department of Obstetrics and Gynecology, Zhongda Hospital, School of Medicine, Southeast University, China.
| | - Ke Chen
- Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, School of Mechanical Engineering, Southeast University, Jiulong Lake Campus, Nanjing 211189, China.
| | - Xiao Li
- Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, School of Mechanical Engineering, Southeast University, Jiulong Lake Campus, Nanjing 211189, China.
| | - Yang Shen
- Department of Obstetrics and Gynecology, Zhongda Hospital, School of Medicine, Southeast University, China.
| | - Zhonghua Ni
- Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, School of Mechanical Engineering, Southeast University, Jiulong Lake Campus, Nanjing 211189, China.
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