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, 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 a battery-powered portable kit, and presents results 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.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/d4lc00040d | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Accurate urine sodium measurements at home using Point of Care Testing in patients with Short Bowel Syndrome.
Clin Nutr ESPEN
January 2025
Department of Gastroenterology and Hepatology, Intestinal Failure Unit, Radboud University Medical Centre Nijmegen, Geert Grooteplein 10, 6500 HB, Nijmegen, The Netherlands. Electronic address:
Background And Aims: Measurement of the urine sodium concentration (USC) is a simple procedure that in many patients adequately indicates their hydration status. This is of particular importance in patients suffering from short bowel syndrome (SBS), who may very rapidly dehydrate and are at risk for permanently compromising their kidney function. A point of care test (POCT) that allows reliable measurement of USC would enable these patients to effectively evaluate their sodium- and water balance in the at home setting, thereby avoiding hospital visits and delayed test results.
View Article and Find Full Text PDFDevelopment of two recombinase-aided amplification assays combined with lateral flow dipstick (RAA-LFD) and real-time fluorescence (RF-RAA) for the detection of Frog virus 3-like ranaviruses.
Fish Shellfish Immunol
January 2025
Key Laboratory of Freshwater Aquatic Genetic Resources Ministry of Agriculture and Rural Affairs, Key Laboratory of Exploration and Utilization of Aquatic genetic Resources, Ministry of Education, International Research Center for Marine Biosciences, Ministry of Science and Technology, Shanghai Ocean University, Shanghai, China. Electronic address:
Frog virus 3-like ranaviruses (FV3-like viruses), particularly FV3 (Frog virus 3), represent typical species within the genus Ranavirus, primarily infecting amphibians and reptiles, thereby posing serious threats to aquaculture and biodiversity conservation. We designed a pair of universal primers and a probe targeting the conserved region of the major capsid protein (MCP) genes of FV3-like viruses. By integrating recombinase-aided amplification (RAA) with lateral flow dipstick (LFD) technology and real-time fluorescence (RF) modification, we established RAA-LFD and RF-RAA assays.
View Article and Find Full Text PDFTopologically constrained DNA-mediated one-pot CRISPR assay for rapid detection of viral RNA with single nucleotide resolution.
EBioMedicine
January 2025
Department of Chemistry, Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, New Cornerstone Science Foundation, Beijing, 100084, China. Electronic address:
Background: The widespread and evolution of RNA viruses, such as the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), highlights the importance of fast identification of virus subtypes, particularly in non-laboratory settings. Rapid and inexpensive at-home testing of viral nucleic acids with single-base resolution remains a challenge.
Methods: Topologically constrained DNA ring is engineered as substrates for the trans-cleavage of Cas13a to yield an accelerated post isothermal amplification.
MOF scaffold for anchoring platinum-nickel nanoparticles with enhanced oxidase-like activity to improve lateral flow immunoassay diagnosis.
Biosens Bioelectron
January 2025
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, China.
Noble metal nanoparticles have attracted tremendous attention as the promising signal reporters for catalytic-colorimetric lateral flow immunoassay (LFIA). However, it remains great challenges for improving their stability and catalytic activity. Herein, first, a kind of porphyrinic based metal-organic framework (MOF) was used as a carrier for loading platinum (Pt) nanoparticles to avoid its aggregation.
View Article and Find Full Text PDFEvaluating the accuracy of multiple rapid diagnostic tests for HIV detection in serum samples analysed during point-of-care proficiency testing assessments.
Diagn Microbiol Infect Dis
January 2025
Centre for HIV & Sexually Transmitted Infections, National Institute for Communicable Diseases, Division of National Health Laboratory Service, Johannesburg, South Africa.
Background: HIV rapid diagnostic tests are crucial for timely diagnosis, especially in resource-limited settings. The World Health Organization recommends sensitivity ≥99 % and specificity ≥98 %. This study assessed RDT performance across South Africa's provinces using a proficiency testing program.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!