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Xu D, An X, Wang Y, Qian L, Qiu W, Zhang X, Liu G. Ultrasensitive lateral flow biosensor based on PtAu@CNTs nanocomposite catalytic chromogenic signal amplification strategy for the detection of nucleic acid. Anal Chim Acta 2023; 1260:341205. [PMID: 37121654 DOI: 10.1016/j.aca.2023.341205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 04/05/2023] [Accepted: 04/07/2023] [Indexed: 05/02/2023]
Abstract
A rapid and ultrasensitive lateral flow biosensor was developed, which based on gold and platinum nanoparticles-decorated carbon nanotubes (PtAu@CNTs) nanocomposite catalytic chromogenic signal amplification strategy for the detection of nucleic acid. Independent platinum and gold nanoparticles modified functional carbon nanotubes (PtAu@CNTs) were prepared by in-situ reduction. Sandwich-type hybridization reaction occurred between PtAu@CNTs-labeled DNA probe, target DNA and Biotin-modified DNA probes, which was captured on test zone of the strip. Accumulation of PtAu@CNTs nano-labels formed a characteristic colored band. After systematic optimization and catalytic chromogen, the naked eye detection limit of PtAu@CNTs-LFA was about 2 pM, and the theoretical detection limit of target DNA is calculated to be 0.43 pM according to the standard curve. The results indicates a rapid, sensitive and specific methods for DNA detection in biological samples, showing great promise for biomedical diagnosis in some malignant diseases in clinical application.
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Affiliation(s)
- Dongqing Xu
- Institute of Biomedical and Health Science, School of Life and Health Science, Anhui Science and Technology University, Fengyang, 233100, Anhui, China
| | - Xue An
- Institute of Biomedical and Health Science, School of Life and Health Science, Anhui Science and Technology University, Fengyang, 233100, Anhui, China
| | - Yuying Wang
- Institute of Biomedical and Health Science, School of Life and Health Science, Anhui Science and Technology University, Fengyang, 233100, Anhui, China
| | - Lisheng Qian
- Institute of Biomedical and Health Science, School of Life and Health Science, Anhui Science and Technology University, Fengyang, 233100, Anhui, China
| | - Wanwei Qiu
- Institute of Biomedical and Health Science, School of Life and Health Science, Anhui Science and Technology University, Fengyang, 233100, Anhui, China.
| | - Xueji Zhang
- Institute of Biomedical and Health Science, School of Life and Health Science, Anhui Science and Technology University, Fengyang, 233100, Anhui, China; School of Biomedical Engineering, Shenzhen University Healthy Science Center, Shenzhen, 518060, Guangdong, China.
| | - Guodong Liu
- Institute of Biomedical and Health Science, School of Life and Health Science, Anhui Science and Technology University, Fengyang, 233100, Anhui, China; Department of Chemistry and Biochemistry, North Dakota State University, Fargo, 58105, ND, USA.
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