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Wang Y, Yang F, Fu Y, He X, Tian H, Yang L, Wu M, Cao J, Liu J. A point-of-care testing platform for on-site identification of genetically modified crops. LAB ON A CHIP 2024; 24:2622-2632. [PMID: 38644672 DOI: 10.1039/d4lc00040d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/23/2024]
Abstract
Genetically modified (GM) food is still highly controversial nowadays. Due to the disparate policies and attitudes worldwide, demands for a rapid, cost-effective and user-friendly GM crop identification method are increasingly significant for import administration, market supervision, etc. However, as the most-recognized methods, nucleic acid-based identification approaches require bulky instruments, long turn-around times and trained personnel, which are only suitable in laboratories. To fulfil the urgent needs of on-site testing, we develop a point-of-care testing platform that is able to identify 12 types of GM crops in less than 40 minutes without using laboratory settings. Our system integrates sample pre-treatment modules in a microfluidic chip, performs DNA amplification via a battery-powered portable kit, and presents results via eye-recognized colorimetric change. A paraffin-based reflow method and a slip plate-based fluid switch are developed to encapsulate and release amplification primers in individual microwells on demand, thus enabling identification of varied targets simultaneously. Our system offers an efficient, affordable and convenient tool for GM crop identification, thus it will not only benefit customs and market administration bureaus, but also satisfy demands of numerous consumers.
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Affiliation(s)
- Yangyang Wang
- State Key Laboratory of High-Performance Precision Manufacturing, Dalian University of Technology, Dalian, 116024, China.
- Key Laboratory for Micro/Nano Technology and System of Liaoning Province, Dalian University of Technology, Dalian, Liaoning, 116024, China
| | - Furui Yang
- State Key Laboratory of High-Performance Precision Manufacturing, Dalian University of Technology, Dalian, 116024, China.
- Key Laboratory for Micro/Nano Technology and System of Liaoning Province, Dalian University of Technology, Dalian, Liaoning, 116024, China
| | - Yingyi Fu
- State Key Laboratory of High-Performance Precision Manufacturing, Dalian University of Technology, Dalian, 116024, China.
- Key Laboratory for Micro/Nano Technology and System of Liaoning Province, Dalian University of Technology, Dalian, Liaoning, 116024, China
| | - Xin He
- State Key Laboratory of High-Performance Precision Manufacturing, Dalian University of Technology, Dalian, 116024, China.
- Key Laboratory for Micro/Nano Technology and System of Liaoning Province, Dalian University of Technology, Dalian, Liaoning, 116024, China
| | - Haowei Tian
- State Key Laboratory of High-Performance Precision Manufacturing, Dalian University of Technology, Dalian, 116024, China.
- Key Laboratory for Micro/Nano Technology and System of Liaoning Province, Dalian University of Technology, Dalian, Liaoning, 116024, China
| | - Lili Yang
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, Dalian Minzu University, Dalian 116600, China.
| | - Mengxi Wu
- State Key Laboratory of High-Performance Precision Manufacturing, Dalian University of Technology, Dalian, 116024, China.
- Key Laboratory for Micro/Nano Technology and System of Liaoning Province, Dalian University of Technology, Dalian, Liaoning, 116024, China
| | - Jijuan Cao
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, Dalian Minzu University, Dalian 116600, China.
| | - Junshan Liu
- State Key Laboratory of High-Performance Precision Manufacturing, Dalian University of Technology, Dalian, 116024, China.
- Key Laboratory for Micro/Nano Technology and System of Liaoning Province, Dalian University of Technology, Dalian, Liaoning, 116024, China
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Liu X, Du X, Huang Y, Pang B, Zhang M, Ma Y, Wang X, Song X, Li J, Li J. Rapid detection of four pathogens in bloodstream infection by antimicrobial peptide capture combined with multiplex PCR and capillary electrophoresis. Microchem J 2022. [DOI: 10.1016/j.microc.2022.108199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Kimura H, Asano R. Strategies to simplify operation procedures for applying labeled antibody-based immunosensors to point-of-care testing. Anal Biochem 2022; 654:114806. [PMID: 35835209 DOI: 10.1016/j.ab.2022.114806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 06/12/2022] [Accepted: 07/07/2022] [Indexed: 11/01/2022]
Abstract
Point-of-care testing (POCT) is an ideal testing format for the rapid and on-site detection of analytes in patients, and facilitates disease diagnosis and monitoring. Molecular recognition elements are required for the specific detection of analytes, and biosensors that use antibodies as the molecular recognition elements are called immunosensors. Traditional immunosensors such as sandwich enzyme-linked immunosorbent assay (ELISA) require complicated procedures to form immunocomplexes consisting of detection antibodies, analytes, and capture antibodies. They also require long incubation times, washing procedures, and large and expensive specialized equipment that must be operated by laboratory technicians. Immunosensors for POCT should be systems that use relatively small pieces of equipment and do not require special training. In this review, to help in the construction of immunosensors for POCT, we have summarized the recently reported strategies for simplifying the operation, incubation, and washing procedures. We focused on the optical and electrochemical detection principles of immunosensors, compared the strategies for operation, sensitivity, and detection devices and discussed the ideal system. Combining detection devices that can be fabricated inexpensively and strategies that enable simplification of operation procedures and enhance sensitivities will contribute to the development of immunosensors for POCT.
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Affiliation(s)
- Hayato Kimura
- Department of Biotechnology and Life Science, Graduate School of Engineering, Tokyo University of Agriculture and Technology, Tokyo, 184-8588, Japan
| | - Ryutaro Asano
- Department of Biotechnology and Life Science, Graduate School of Engineering, Tokyo University of Agriculture and Technology, Tokyo, 184-8588, Japan; Institute of Global Innovation Research, Tokyo University of Agriculture and Technology, Tokyo, 184-8588, Japan.
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