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Guo D, Ling Z, Tang Y, Li G, Zhang T, Zhao H, Ren H, Shen Y, Yang X. An Ultra-Compact and Low-Cost LAMP-Based Virus Detection Device. SENSORS (BASEL, SWITZERLAND) 2024; 24:4912. [PMID: 39123959 PMCID: PMC11314854 DOI: 10.3390/s24154912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2024] [Revised: 07/25/2024] [Accepted: 07/26/2024] [Indexed: 08/12/2024]
Abstract
Timely and accurate detection of viruses is crucial for infection diagnosis and treatment. However, it remains a challenge to develop a portable device that meets the requirement of being portable, powerless, user-friendly, reusable, and low-cost. This work reports a compact ∅30 × 48 mm portable powerless isothermal amplification detection device (material cost ∼$1 USD) relying on LAMP (Loop-Mediated Isothermal Amplification). We have proposed chromatographic-strip-based microporous permeation technology which can precisely control the water flow rate to regulate the exothermic reaction. This powerless heating combined with phase-change materials can maintain a constant temperature between 50 and 70 °C for a duration of up to 49.8 min. Compared with the conventional methods, it avoids the use of an additional insulation layer for heat preservation, greatly reducing the size and cost. We have also deployed a color card and a corresponding algorithm to facilitate color recognition, data analysis, and storage using a mobile phone. The experimental results demonstrate that our device exhibits the same limit of detection (LOD) as the ProFlex PCR for SARS-CoV-2 pseudovirus samples, with that for both being 103 copies/μL, verifying its effectiveness and reliability. This work offers a timely, low-cost, and easy way for respiratory infectious disease detection, which could provide support in curbing virus transmission and protecting the health of humans and animals, especially in remote mountainous areas without access to electricity or trained professionals.
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Affiliation(s)
- Dong Guo
- Shenzhen Research Institute, City University of Hong Kong, Shenzhen 518000, China
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong 999077, China
- Department of Electronic and Computer Engineering, Hong Kong University of Science and Technology, Hong Kong 999077, China
| | - Zhengrong Ling
- Department of Electronic and Computer Engineering, Hong Kong University of Science and Technology, Hong Kong 999077, China
| | - Yifeng Tang
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong 999077, China
- Department of Electronic and Computer Engineering, Hong Kong University of Science and Technology, Hong Kong 999077, China
| | - Gen Li
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong 999077, China
- Department of Electronic and Computer Engineering, Hong Kong University of Science and Technology, Hong Kong 999077, China
| | - Tieshan Zhang
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong 999077, China
- Department of Electronic and Computer Engineering, Hong Kong University of Science and Technology, Hong Kong 999077, China
| | - Haoxiang Zhao
- Department of Electronic and Computer Engineering, Hong Kong University of Science and Technology, Hong Kong 999077, China
| | - Hao Ren
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong 999077, China
- Department of Electronic and Computer Engineering, Hong Kong University of Science and Technology, Hong Kong 999077, China
| | - Yajing Shen
- Shenzhen Research Institute, City University of Hong Kong, Shenzhen 518000, China
- Department of Electronic and Computer Engineering, Hong Kong University of Science and Technology, Hong Kong 999077, China
| | - Xiong Yang
- Department of Electronic and Computer Engineering, Hong Kong University of Science and Technology, Hong Kong 999077, China
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Son J, Kim SH, Cha BS, Lee ES, Kim S, Park KS. Primer exchange reaction-coupled transcription isothermal amplification as a sensitive biomolecular assay. Chem Commun (Camb) 2024; 60:4565-4568. [PMID: 38572617 DOI: 10.1039/d4cc00665h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2024]
Abstract
We devised a novel strategy that relies on a combination of the primer exchange reaction (PER) with transcription isothermal amplification, termed PER-Trap, for a sensitive biomolecular assay. Its design allowed light-up RNA aptamers to be produced as the final product, leading to the generation of an amplified fluorescence signal. The utility of PER-Trap was successfully demonstrated by the detection of exosomes.
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Affiliation(s)
- Jinseo Son
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea.
| | - Seok Hyeon Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea.
| | - Byung Seok Cha
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea.
| | - Eun Sung Lee
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea.
| | - Seokjoon Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea.
| | - Ki Soo Park
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea.
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Zhu W, Hussain M, Gao J, Mao R, An X. Development of Loop-Mediated Isothermal Amplification Method for Rapid and Sensitive Identification of Hermetia illucens (Diptera: Stratiomyidae). Methods Protoc 2023; 6:81. [PMID: 37736964 PMCID: PMC10514858 DOI: 10.3390/mps6050081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 08/29/2023] [Accepted: 08/30/2023] [Indexed: 09/23/2023] Open
Abstract
The black soldier fly (BSF) is well known for its ability to biologically convert organic waste into insect biomass, including protein and oil, which can be utilised as animal feed. Since raw BSF products, such as BSF powder, are difficult to differentiate from other biological raw materials, therefore new analytical approaches are required. In this study, we have developed a new and fast method based on loop-mediated isothermal AMPlification (LAMP) reaction that can diagnose black soldier fly larvae and BSF byproducts with high accuracy, specificity and sensitivity. Species-specific primers for BSF were designed based on targeting the mitochondrial cytochrome C oxidase I (COI) gene. The assay was able to detect as low as 820 fg/L of BSF DNA in 60 min at 65 °C, which was a hundredfold higher than the detection limit of classical polymerase chain reaction and did not show cross-reactivity. In conclusion, the LAMP assay demonstrated excellent sensitivity and specificity to detect BSF and BSF byproducts, with a sampling-to-result identification time of 60 min.
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Affiliation(s)
- Wenchao Zhu
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Guangdong Engineering Research Center for Mineral Oil Pesticides, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou 510260, China
- Yantai Academy of Agricultural Sciences, Yantai 265500, China
| | - Mubasher Hussain
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Guangdong Engineering Research Center for Mineral Oil Pesticides, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou 510260, China
| | - Jing Gao
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Guangdong Engineering Research Center for Mineral Oil Pesticides, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou 510260, China
| | - Runqian Mao
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Guangdong Engineering Research Center for Mineral Oil Pesticides, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou 510260, China
| | - Xincheng An
- Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Guangdong Engineering Research Center for Mineral Oil Pesticides, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou 510260, China
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Wang J, Wang J, Chang X, Shang J, Wang Y, Ma Q, Shen L. Rapid Detection of Streptococcus mutans Using an Integrated Microfluidic System with Loop-Mediated Isothermal Amplification. J Microbiol Biotechnol 2023; 33:1101-1110. [PMID: 37280774 PMCID: PMC10468681 DOI: 10.4014/jmb.2304.04026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 05/14/2023] [Accepted: 05/16/2023] [Indexed: 06/08/2023]
Abstract
Streptococcus mutans is the primary causative agent of caries, which is one of the most common human diseases. Thus, rapid and early detection of cariogenic bacteria is critical for its prevention. This study investigated the combination of loop-mediated isothermal amplification (LAMP) and microfluid technology to quantitatively detect S. mutans. A low-cost, rapid microfluidic chip using LAMP technology was developed to amplify and detect bacteria at 2.2-2.2 × 106 colony-forming units (CFU)/ml and its detection limits were compared to those of standard polymerase chain reaction. A visualization system was established to quantitatively determine the experimental results, and a functional relationship between the bacterial concentration and quantitative results was established. The detection limit of S. mutans using this microfluidic chip was 2.2 CFU/ml, which was lower than that of the standard approach. After quantification, the experimental results showed a good linear relationship with the concentration of S. mutans, thereby confirming the effectiveness and accuracy of the custom-made integrated LAMP microfluidic system for the detection of S. mutans. The microfluidic system described herein may represent a promising simple detection method for the specific and rapid testing of individuals at risk of caries.
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Affiliation(s)
- Jingfu Wang
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Cranio-facial Trauma and Orthognathic Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an 710032, P.R.China
- Department of Stomatology, General Hospital of Northern Theater Command, 83 Wenhua Road, Shenyang 110016, P.R.China
| | - Jingyi Wang
- College of Information and Electrical Engineering, Shenyang Agricultural University, Shenyang 110866, P.R.China
| | - Xin Chang
- Outpatient Department, The Ninth Retired Cadres Retreat of Liaoning Military Command, 176 Dongbei Road, Shenyang 110044, P.R.China
| | - Jin Shang
- Department of Stomatology, General Hospital of Northern Theater Command, 83 Wenhua Road, Shenyang 110016, P.R.China
| | - Yuehui Wang
- Department of Stomatology, General Hospital of Northern Theater Command, 83 Wenhua Road, Shenyang 110016, P.R.China
| | - Qin Ma
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Cranio-facial Trauma and Orthognathic Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an 710032, P.R.China
| | - Liangliang Shen
- Department of Biochemistry and Molecular Biology, Fourth Military Medical University, Xi'an, P.R.China
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Simon DS, Yew CW, Kumar VS. Multiplexed Reverse Transcription Loop-Mediated Isothermal Amplification Coupled with a Nucleic Acid-Based Lateral Flow Dipstick as a Rapid Diagnostic Method to Detect SARS-CoV-2. Microorganisms 2023; 11:1233. [PMID: 37317207 PMCID: PMC10223058 DOI: 10.3390/microorganisms11051233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 04/30/2023] [Accepted: 05/03/2023] [Indexed: 06/16/2023] Open
Abstract
Due to the high reproduction rate of COVID-19, it is important to identify and isolate infected patients at the early stages of infection. The limitations of current diagnostic methods are speed, cost, and accuracy. Furthermore, new viral variants have emerged with higher rates of infectivity and mortality, many with mutations at various primer binding sites, which may evade detection via conventional PCR kits. Therefore, a rapid method that is sensitive, specific, and cost-effective is needed for a point-of-care molecular test. Accordingly, we developed a rapid molecular SARS-CoV-2 detection kit with high specificity and sensitivity, RT-PCR, taking advantage of the loop-mediated isothermal amplification (LAMP) technique. Four sets of six primers were designed based on conserved regions of the SARS-CoV-2 genome: two outer, two inner and two loop primers. Using the optimized protocol, SARS-CoV-2 genes were detected as quickly as 10 min but were most sensitive at 30 min, detecting as little as 100 copies of template DNA. We then coupled the RT-LAMP with a lateral flow dipstick (LFD) for multiplex detection. The LFD could detect two genic amplifications on a single strip, making it suitable for multiplexed detection. The development of a multiplexed RT-LAMP-LFD reaction on crude VTM samples would be suitable for the point-of-care diagnosis of COVID-19 in diagnostic laboratories as well as in private homes.
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Affiliation(s)
| | | | - Vijay Subbiah Kumar
- Biotechnology Research Institute, Universiti Malaysia Sabah, Kota Kinabalu 88400, Malaysia; (D.S.S.); (C.-W.Y.)
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