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Gao J, Wang C, Wang C, Chu Y, Wang S, Sun MY, Ji H, Gao Y, Wang Y, Han Y, Song F, Liu H, Zhang Y, Han L. Poly-l-Lysine-Modified Graphene Field-Effect Transistor Biosensors for Ultrasensitive Breast Cancer miRNAs and SARS-CoV-2 RNA Detection. Anal Chem 2022; 94:1626-1636. [PMID: 35025203 PMCID: PMC8767657 DOI: 10.1021/acs.analchem.1c03786] [Citation(s) in RCA: 38] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 01/04/2022] [Indexed: 11/29/2022]
Abstract
(Mi)RNAs are important biomarkers for cancers diagnosis and pandemic diseases, which require fast, ultrasensitive, and economical detection strategies to quantitatively detect exact (mi)RNAs expression levels. The novel coronavirus disease (SARS-CoV-2) has been breaking out globally, and RNA detection is the most effective way to identify the SARS-CoV-2 virus. Here, we developed an ultrasensitive poly-l-lysine (PLL)-functionalized graphene field-effect transistor (PGFET) biosensor for breast cancer miRNAs and viral RNA detection. PLL is functionalized on the channel surface of GFET to immobilize DNA probes by the electrostatic force. The results show that PGFET biosensors can achieve a (mi)RNA detection range of five orders with a detection limit of 1 fM and an entire detection time within 20 min using 2 μL of human serum and throat swab samples, which exhibits more than 113% enhancement in terms of sensitivity compared to that of GFET biosensors. The performance enhancement mechanisms of PGFET biosensors were comprehensively studied based on an electrical biosensor theoretical model and experimental results. In addition, the PGFET biosensor was applied for the breast cancer miRNA detection in actual serum samples and SARS-CoV-2 RNA detection in throat swab samples, providing a promising approach for rapid cancer diagnosis and virus screening.
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Affiliation(s)
- Jianwei Gao
- Institute
of Marine Science and Technology, Shandong
University, Qingdao 266237, China
| | - Chunhua Wang
- Institute
of Marine Science and Technology, Shandong
University, Qingdao 266237, China
| | - Chao Wang
- Institute
of Marine Science and Technology, Shandong
University, Qingdao 266237, China
| | - Yujin Chu
- Institute
of Marine Science and Technology, Shandong
University, Qingdao 266237, China
| | - Shun Wang
- Institute
of Marine Science and Technology, Shandong
University, Qingdao 266237, China
| | - Ming yuan Sun
- Institute
of Marine Science and Technology, Shandong
University, Qingdao 266237, China
| | - Hao Ji
- Institute
of Marine Science and Technology, Shandong
University, Qingdao 266237, China
| | - Yakun Gao
- Institute
of Marine Science and Technology, Shandong
University, Qingdao 266237, China
| | - Yanhao Wang
- Institute
of Marine Science and Technology, Shandong
University, Qingdao 266237, China
| | - Yingkuan Han
- Institute
of Marine Science and Technology, Shandong
University, Qingdao 266237, China
| | - Fangteng Song
- Institute
of Marine Science and Technology, Shandong
University, Qingdao 266237, China
| | - Hong Liu
- State
Key Laboratory of Crystal Materials, Shandong
University, Jinan, Shandong 250100, China
| | - Yu Zhang
- Institute
of Marine Science and Technology, Shandong
University, Qingdao 266237, China
| | - Lin Han
- Institute
of Marine Science and Technology, Shandong
University, Qingdao 266237, China
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Tamgadge RM, Shukla A. A pH-dependent partial electrochemical exfoliation of highly oriented pyrolytic graphite for high areal capacitance electric double layer capacitor electrode. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.134933] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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