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Feddema JJ, Fernald KDS, Keijser BJF, Kieboom J, van de Burgwal LHM. Commercial Opportunity or Addressing Unmet Needs-Loop-Mediated Isothermal Amplification (LAMP) as the Future of Rapid Diagnostic Testing? Diagnostics (Basel) 2024; 14:1845. [PMID: 39272630 PMCID: PMC11394392 DOI: 10.3390/diagnostics14171845] [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: 07/11/2024] [Revised: 08/01/2024] [Accepted: 08/14/2024] [Indexed: 09/15/2024] Open
Abstract
Loop-Mediated Isothermal Amplification (LAMP) technology is emerging as a rapid pathogen testing method, potentially challenging the RT-PCR "gold standard". Despite recent advancements, LAMP's widespread adoption remains limited. This study provides a comprehensive market overview and assesses future growth prospects to aid stakeholders in strategic decision-making and policy formulation. Using a dataset of 1134 LAMP patent documents, we analyzed lifecycle and geographic distribution, applicant profiles, CPC code classifications, and patent claims. Additionally, we examined clinical developments from 21 curated clinical trials, focusing on trends, geographic engagement, sponsor types, and the conditions and pathogens investigated. Our analysis highlights LAMP's potential as a promising rapid pathogen testing alternative, especially in resource-limited areas. It also reveals a gap between clinical research, which targets bacterial and parasitic diseases like malaria, leishmaniasis, and tuberculosis, and basic research and commercial efforts that prioritize viral diseases such as SARS-CoV-2 and influenza. European stakeholders emphasize the societal impact of addressing unmet needs in resource-limited areas, while American and Asian organizations focus more on research, innovation, and commercialization.
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Affiliation(s)
- Jelle J Feddema
- Athena Institute, Vrije Universiteit Amsterdam, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands
| | - Kenneth D S Fernald
- Athena Institute, Vrije Universiteit Amsterdam, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands
| | - Bart J F Keijser
- TNO Healthy Living and Work, Microbiology and Systems Biology, Sylviusweg 71, 2333 BE Leiden, The Netherlands
| | - Jasper Kieboom
- TNO Healthy Living and Work, Microbiology and Systems Biology, Sylviusweg 71, 2333 BE Leiden, The Netherlands
| | - Linda H M van de Burgwal
- Athena Institute, Vrije Universiteit Amsterdam, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands
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Lim J, Han W, Thang LTH, Lee YW, Shin JH. Customizable Nichrome Wire Heaters for Molecular Diagnostic Applications. BIOSENSORS 2024; 14:152. [PMID: 38534259 DOI: 10.3390/bios14030152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Revised: 03/09/2024] [Accepted: 03/19/2024] [Indexed: 03/28/2024]
Abstract
Accurate sample heating is vital for nucleic acid extraction and amplification, requiring a sophisticated thermal cycling process in nucleic acid detection. Traditional molecular detection systems with heating capability are bulky, expensive, and primarily designed for lab settings. Consequently, their use is limited where lab systems are unavailable. This study introduces a technique for performing the heating process required in molecular diagnostics applicable for point-of-care testing (POCT), by presenting a method for crafting customized heaters using freely patterned nichrome (NiCr) wire. This technique, fabricating heaters by arranging protrusions on a carbon black-polydimethylsiloxane (PDMS) cast and patterning NiCr wire, utilizes cost-effective materials and is not constrained by shape, thereby enabling customized fabrication in both two-dimensional (2D) and three-dimensional (3D). To illustrate its versatility and practicality, a 2D heater with three temperature zones was developed for a portable device capable of automatic thermocycling for polymerase chain reaction (PCR) to detect Escherichia coli (E. coli) O157:H7 pathogen DNA. Furthermore, the detection of the same pathogen was demonstrated using a customized 3D heater surrounding a microtube for loop-mediated isothermal amplification (LAMP). Successful DNA amplification using the proposed heater suggests that the heating technique introduced in this study can be effectively applied to POCT.
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Affiliation(s)
- Juhee Lim
- Industry 4.0 Convergence Bionics Engineering, Pukyong National University, Busan 48513, Republic of Korea
| | - Won Han
- Industry 4.0 Convergence Bionics Engineering, Pukyong National University, Busan 48513, Republic of Korea
| | - Le Tran Huy Thang
- Industry 4.0 Convergence Bionics Engineering, Pukyong National University, Busan 48513, Republic of Korea
| | - Yong Wook Lee
- Industry 4.0 Convergence Bionics Engineering, Pukyong National University, Busan 48513, Republic of Korea
- School of Electrical Engineering, Pukyong National University, Busan 48513, Republic of Korea
| | - Joong Ho Shin
- Industry 4.0 Convergence Bionics Engineering, Pukyong National University, Busan 48513, Republic of Korea
- Major of Biomedical Engineering, Division of Smart Healthcare, College of Information Technology and Convergence, Pukyong National University, Busan 48513, Republic of Korea
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Pandey S, McCoy SS, Stobdan T, Sahoo D. Quantitative mRNA expression measurement at home. Sci Rep 2024; 14:1013. [PMID: 38200031 PMCID: PMC10781964 DOI: 10.1038/s41598-023-49651-8] [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: 07/09/2023] [Accepted: 12/11/2023] [Indexed: 01/12/2024] Open
Abstract
mRNA measurement is dominated by RT-PCR, which requires expensive laboratory equipment and personnel with advanced degrees. Loop-mediated isothermal amplification (LAMP) is a versatile technique for detecting target DNA and RNA. The sensitivity of LAMP in early reports has been below that of the standard RT-PCR tests. Here, we report the use of a fluorescence-based RT-LAMP protocol to measure CDX2 expression patterns, which match extremely well to the standards of sophisticated RT-PCR techniques (r = 0.99, p < 0.001). The assay works on diverse sample types such as cDNA, mRNA, and direct tissue sample testing in 25 min compared to more than 3 h for RT-PCR. We have developed a new protocol for designing RT-LAMP primers that reduce false positives due to self-amplification and improve quantification. A simple device with a 3D-printed box enables the measurement of mRNA expression at home, outdoors, and point-of-care setting.
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Affiliation(s)
- Sonalisa Pandey
- Shanvi, San Diego, CA, USA
- Department of Pediatrics, University of California San Diego, 9500 Gilman Drive, MC 0703, Leichtag Building 132, La Jolla, CA, 92093-0703, USA
| | - Sara Safa McCoy
- Department of Pediatrics, University of California San Diego, 9500 Gilman Drive, MC 0703, Leichtag Building 132, La Jolla, CA, 92093-0703, USA
- Department of Computer Science and Engineering, Jacob's School of Engineering, University of California San Diego, La Jolla, USA
| | - Tsering Stobdan
- Department of Pediatrics, University of California San Diego, 9500 Gilman Drive, MC 0703, Leichtag Building 132, La Jolla, CA, 92093-0703, USA
| | - Debashis Sahoo
- Shanvi, San Diego, CA, USA.
- Department of Pediatrics, University of California San Diego, 9500 Gilman Drive, MC 0703, Leichtag Building 132, La Jolla, CA, 92093-0703, USA.
- Department of Computer Science and Engineering, Jacob's School of Engineering, University of California San Diego, La Jolla, USA.
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Zou Y, Mason MG, Botella JR. A low-cost, portable, dual-function readout device for amplification-based point-of-need diagnostics. Appl Environ Microbiol 2023; 89:e0090223. [PMID: 38047632 PMCID: PMC10734478 DOI: 10.1128/aem.00902-23] [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: 05/29/2023] [Accepted: 09/25/2023] [Indexed: 12/05/2023] Open
Abstract
IMPORTANCE The first critical step in timely disease management is rapid disease identification, which is ideally on-site detection. Of all the technologies available for disease identification, nucleic acid amplification-based diagnostics are often used due to their specificity, sensitivity, adaptability, and speed. However, the modules to interpret amplification results rapidly, reliably, and easily in resource-limited settings at point-of-need (PON) are in high demand. Therefore, we developed a portable, low-cost, and easy-to-perform device that can be used for amplification readout at PON to enable rapid yet reliable disease identification by users with minimal training.
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Affiliation(s)
- Yiping Zou
- College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, China
- School of Agriculture and Food Sciences, The University of Queensland, Brisbane, Queensland, Australia
| | - Michael Glenn Mason
- School of Agriculture and Food Sciences, The University of Queensland, Brisbane, Queensland, Australia
| | - Jose Ramon Botella
- School of Agriculture and Food Sciences, The University of Queensland, Brisbane, Queensland, Australia
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Blin M, Senghor B, Boissier J, Mulero S, Rey O, Portela J. Development of environmental loop-mediated isothermal amplification (eLAMP) diagnostic tool for Bulinus truncatus field detection. Parasit Vectors 2023; 16:78. [PMID: 36855192 PMCID: PMC9972309 DOI: 10.1186/s13071-023-05705-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Accepted: 02/15/2023] [Indexed: 03/02/2023] Open
Abstract
BACKGROUND Global changes are reshaping the distribution of vector-borne diseases by spreading vectors to previously non-endemic areas. Since 2013, urogenital schistosomiasis has emerged in Corsica and threatens European countries. Gastropod vectors release schistosome larvae that can infect humans who come into contact with freshwater bodies. Monitoring schistosomiasis host vectors is a prerequisite to understand and subsequently to control this pathogen transmission. Because malacological surveys are time consuming and require special expertise, the use of a simple molecular method is desirable. METHODS The aim of this study is to develop a ready-to-use protocol using the LAMP (loop-mediated isothermal amplification) method to detect environmental DNA of Bulinus truncatus, vector of Schistosoma haematobium. Interestingly, LAMP method possesses all the characteristics required for adaptability to field conditions particularly in low-income countries: speed, simplicity, lyophilized reagents, low cost and robustness against DNA amplification inhibitors. We have tested this new method on Corsican water samples previously analysed by qPCR and ddPCR. RESULTS We demonstrate that our diagnostic tool B. truncatus eLAMP (Bt-eLAMP) can detect the eDNA of Bulinus truncatus as effectively as the two other methods. Bt-eLAMP can even detect 1/4 of positive samples not detectable by qPCR. Moreover, the complete Bt-eLAMP protocol (sampling, sample pre-process, amplification and revelation) does not require sophisticated equipment and can be done in 1 ½ h. CONCLUSIONS LAMP detection of environmental DNA provides large-scale sensitive surveillance of urogenital schistosomiasis possible by identifying potentially threatened areas. More generally, eLAMP method has great potential in vector-borne diseases and ecology.
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Affiliation(s)
- Manon Blin
- Hosts Pathogens Environment Interactions, UMR 5244, CNRS, IFREMER, UM, University of Perpignan, Via Domitia, 66860, Perpignan, France. .,SAS ParaDev®, 66860, Perpignan, France.
| | - Bruno Senghor
- VITROME, IRD-UCAD International Campus, 1386 Dakar, Senegal
| | - Jérôme Boissier
- grid.11136.340000 0001 2192 5916Hosts Pathogens Environment Interactions, UMR 5244, CNRS, IFREMER, UM, University of Perpignan, Via Domitia, 66860 Perpignan, France
| | - Stephen Mulero
- grid.11136.340000 0001 2192 5916Hosts Pathogens Environment Interactions, UMR 5244, CNRS, IFREMER, UM, University of Perpignan, Via Domitia, 66860 Perpignan, France ,Univ. Grenoble-Alpes, Univ. Savoie Mont Blanc, CNRS-LECA, 38000 Grenoble, France
| | - Olivier Rey
- grid.11136.340000 0001 2192 5916Hosts Pathogens Environment Interactions, UMR 5244, CNRS, IFREMER, UM, University of Perpignan, Via Domitia, 66860 Perpignan, France
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Li M, Ge H, Sun Z, Fu J, Cao L, Feng X, Meng G, Peng Y, Liu Y, Zhao C. A loop-mediated isothermal amplification-enabled analytical assay for the detection of SARS-CoV-2: A review. Front Cell Infect Microbiol 2022; 12:1068015. [PMID: 36619749 PMCID: PMC9816412 DOI: 10.3389/fcimb.2022.1068015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Accepted: 11/29/2022] [Indexed: 12/24/2022] Open
Abstract
The number of words: 4645, the number of figures: 4, the number of tables: 1The outbreak of COVID-19 in December 2019 caused a global pandemic of acute respiratory disease, and with the increasing virulence of mutant strains and the number of confirmed cases, this has resulted in a tremendous threat to global public health. Therefore, an accurate diagnosis of COVID-19 is urgently needed for rapid control of SARS-CoV-2 transmission. As a new molecular biology technology, loop-mediated isothermal amplification (LAMP) has the advantages of convenient operation, speed, low cost and high sensitivity and specificity. In the past two years, rampant COVID-19 and the continuous variation in the virus strains have demanded higher requirements for the rapid detection of pathogens. Compared with conventional RT-PCR and real-time RT-PCR methods, genotyping RT-LAMP method and LAMP plus peptide nucleic acid (PNA) probe detection methods have been developed to correctly identified SARS-CoV-2 variants, which is also why LAMP technology has attracted much attention. LAMP detection technology combined with lateral flow assay, microfluidic technology and other sensing technologies can effectively enhance signals by nucleic acid amplification and help to give the resulting output in a faster, more convenient and user-friendly way. At present, LAMP plays an important role in the detection of SARS-CoV-2.
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Affiliation(s)
- Mingna Li
- College of public health, Jilin Medical University, Jilin, China,College of medical technology, Beihua University, Jilin, China
| | - Hongjuan Ge
- College of public health, Jilin Medical University, Jilin, China
| | - Zhe Sun
- College of public health, Jilin Medical University, Jilin, China,College of medical technology, Beihua University, Jilin, China
| | - Jangshan Fu
- College of public health, Jilin Medical University, Jilin, China
| | - Lele Cao
- College of public health, Jilin Medical University, Jilin, China
| | - Xinrui Feng
- College of public health, Jilin Medical University, Jilin, China,Medical college, Yanbian University, Jilin, China
| | - Guixian Meng
- College of medical laboratory, Jilin Medical University, Jilin, China
| | - Yubo Peng
- Business School, The University of Adelaide, Adelaide, SA, Australia
| | - Yan Liu
- College of public health, Jilin Medical University, Jilin, China,*Correspondence: Yan Liu, ; Chen Zhao,
| | - Chen Zhao
- College of public health, Jilin Medical University, Jilin, China,*Correspondence: Yan Liu, ; Chen Zhao,
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Ongaro AE, Ndlovu Z, Sollier E, Otieno C, Ondoa P, Street A, Kersaudy-Kerhoas M. Engineering a sustainable future for point-of-care diagnostics and single-use microfluidic devices. LAB ON A CHIP 2022; 22:3122-3137. [PMID: 35899603 PMCID: PMC9397368 DOI: 10.1039/d2lc00380e] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 06/20/2022] [Indexed: 06/15/2023]
Abstract
Single-use, disposable, point-of-care diagnostic devices carry great promise for global health, including meeting urgent needs for testing and diagnosis in places with limited laboratory facilities. Unfortunately, the production and disposal of single-use devices, whether in lateral flow assay, cartridges, cassettes, or lab-on-chip microfluidic format, also poses significant challenges for environmental and human health. Point-of-care devices are commonly manufactured from unsustainable polymeric materials derived from fossil sources. Their disposal often necessitates incineration to reduce infection risk, thereby creating additional release of CO2. Many devices also contain toxic chemicals, such as cyanide derivatives, that are damaging to environmental and human health if not disposed of safely. Yet, in the absence of government regulatory frameworks, safe and sustainable waste management for these novel medical devices is often left unaddressed. There is an urgent need to find novel solutions to avert environmental and human harm from these devices, especially in low- and middle-income countries where waste management infrastructure is often weak and where the use of point-of-care tests is projected to rise in coming years. We review here common materials used in the manufacture of single-use point-of-care diagnostic tests, examine the risks they pose to environmental and human health, and investigate replacement materials that can potentially reduce the impact of microfluidic devices on the production of harmful waste. We propose solutions available to point-of-care test developers to start embedding sustainability at an early stage in their design, and to reduce their non-renewable plastic consumption in research and product development.
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Affiliation(s)
| | - Zibusiso Ndlovu
- Medecins Sans Frontières (MSF), Southern Africa Medical Unit (SAMU), Cape Town, South Africa
| | | | - Collins Otieno
- African Society for Laboratory Medicine (ASLM), Addis Ababa, Ethiopia
| | - Pascale Ondoa
- African Society for Laboratory Medicine (ASLM), Addis Ababa, Ethiopia
| | - Alice Street
- School of Social and Political Sciences, University of Edinburgh, Edinburgh, UK
| | - Maïwenn Kersaudy-Kerhoas
- School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, UK.
- Infection Medicine, College of Medicine and Veterinary Medicine University of Edinburgh, Edinburgh, UK
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