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Wu X, Xie B, Qiao Y, Yuan S, Du W. μMET: A Novel Reusable Microfluidic Chip for Precision Microbial Enumeration Tests. Anal Chem 2024; 96:630-635. [PMID: 38163292 DOI: 10.1021/acs.analchem.3c04889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
This work describes μMET, a novel microfluidic device for precise microbial enumeration tests (MET), essential in pharmaceutical, cosmetic, and food industries for ensuring microbiological safety standards. The μMET chip, comprising two hydrophobic glass plates, features a 15-μm deep μMET chamber enhanced by nanopillars and air supply units, facilitating both immediate and growth-dependent MET. Experimental results, with E. coli as a model bacterium, demonstrate that μMET provides counting linearity that outperforms traditional hemocytometers. The chip's design mitigates challenges like evaporation and ensures high-resolution imaging, making it a cost-effective and reusable alternative to conventional methods. Notably, bright-field μMET eliminates the need for fluorescent staining, streamlining operations with deep-learning algorithms for bacterial counts. Furthermore, we have developed a high-parallel μMET chip featuring 16 counting chambers, enhancing throughput and accommodating immediate and growth-dependent MET approaches. Its innovative design and adaptability render the μMET chip as a valuable tool for microbiology, medicine, and industry applications.
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Affiliation(s)
- Xiaolin Wu
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- College of Life Sciences and Savaid Medical School, University of the Chinese Academy of Sciences, Beijing 10049, China
| | - Bingliang Xie
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- College of Life Sciences and Savaid Medical School, University of the Chinese Academy of Sciences, Beijing 10049, China
| | - Yuxin Qiao
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Shuai Yuan
- China National Pharmaceutical Foreign Trade Corporation, Beijing 100029, China
| | - Wenbin Du
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- College of Life Sciences and Savaid Medical School, University of the Chinese Academy of Sciences, Beijing 10049, China
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Wu J, Zhou JH, Liu DF, Wu J, He RL, Cheng ZH, Li HH, Li WW. Phthalates Promote Dissemination of Antibiotic Resistance Genes: An Overlooked Environmental Risk. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:6876-6887. [PMID: 37083356 DOI: 10.1021/acs.est.2c09491] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Plastics-microorganism interactions have aroused growing environmental and ecological concerns. However, previous studies concentrated mainly on the direct interactions and paid little attention to the ecotoxicology effects of phthalates (PAEs), a common plastic additive that is continuously released and accumulates in the environment. Here, we provide insights into the impacts of PAEs on the dissemination of antibiotic resistance genes (ARGs) among environmental microorganisms. Dimethyl phthalate (DMP, a model PAE) at environmentally relevant concentrations (2-50 μg/L) significantly boosted the plasmid-mediated conjugation transfer of ARGs among intrageneric, intergeneric, and wastewater microbiota by up to 3.82, 4.96, and 4.77 times, respectively. The experimental and molecular dynamics simulation results unveil a strong interaction between the DMP molecules and phosphatidylcholine bilayer of the cell membrane, which lowers the membrane lipid fluidity and increases the membrane permeability to favor transfer of ARGs. In addition, the increased reactive oxygen species generation and conjugation-associated gene overexpression under DMP stress also contribute to the increased gene transfer. This study provides fundamental knowledge of the PAE-bacteria interactions to broaden our understanding of the environmental and ecological risks of plastics, especially in niches with colonized microbes, and to guide the control of ARG environmental spreading.
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Affiliation(s)
- Jing Wu
- School of Life Sciences, University of Science and Technology of China, Hefei 230026, China
- Suzhou Institute for Advanced Research, University of Science and Technology of China, Suzhou 215123, China
| | - Jun-Hua Zhou
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China
- Suzhou Institute for Advanced Research, University of Science and Technology of China, Suzhou 215123, China
| | - Dong-Feng Liu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Jie Wu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China
- Suzhou Institute for Advanced Research, University of Science and Technology of China, Suzhou 215123, China
| | - Ru-Li He
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China
- Suzhou Institute for Advanced Research, University of Science and Technology of China, Suzhou 215123, China
| | - Zhou-Hua Cheng
- School of Life Sciences, University of Science and Technology of China, Hefei 230026, China
| | - Hui-Hui Li
- School of Life Sciences, University of Science and Technology of China, Hefei 230026, China
| | - Wen-Wei Li
- School of Life Sciences, University of Science and Technology of China, Hefei 230026, China
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China
- Suzhou Institute for Advanced Research, University of Science and Technology of China, Suzhou 215123, China
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3
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Labohá P, Sychrová E, Brózman O, Sovadinová I, Bláhová L, Prokeš R, Ondráček J, Babica P. Cyanobacteria, cyanotoxins and lipopolysaccharides in aerosols from inland freshwater bodies and their effects on human bronchial cells. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2023; 98:104073. [PMID: 36738853 DOI: 10.1016/j.etap.2023.104073] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 01/19/2023] [Accepted: 01/27/2023] [Indexed: 06/18/2023]
Abstract
Components of cyanobacterial water blooms were quantified in aerosols above agitated water surfaces of five freshwater bodies. The thoracic and respirable aerosol fraction (0.1-10 µm) was sampled using a high-volume sampler. Cyanotoxins microcystins were detected by LC-MS/MS at levels 0.3-13.5 ng/mL (water) and < 35-415 fg/m3 (aerosol). Lipopolysaccharides (endotoxins) were quantified by Pyrogene rFC assay at levels < 10-119 EU/mL (water) and 0.13-0.64 EU/m3 (aerosol). Cyanobacterial DNA was detected by qPCR at concentrations corresponding to 104-105 cells eq./mL (water) and 101-103 cells eq./m3 (aerosol). Lipopolysaccharides isolated from bloom samples induced IL-6 and IL-8 cytokine release in human bronchial epithelial cells Beas-2B, while extracted cyanobacterial metabolites induced both pro-inflammatory and cytotoxic effects. Bloom components detected in aerosols and their bioactivities observed in upper respiratory airway epithelial cells together indicate that aerosols formed during cyanobacterial water blooms could induce respiratory irritation and inflammatory injuries, and thus present an inhalation health risk.
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Affiliation(s)
- Petra Labohá
- RECETOX, Faculty of Science, Masaryk University, Kotlářská 2, 61137 Brno, Czech Republic
| | - Eliška Sychrová
- RECETOX, Faculty of Science, Masaryk University, Kotlářská 2, 61137 Brno, Czech Republic
| | - Ondřej Brózman
- RECETOX, Faculty of Science, Masaryk University, Kotlářská 2, 61137 Brno, Czech Republic
| | - Iva Sovadinová
- RECETOX, Faculty of Science, Masaryk University, Kotlářská 2, 61137 Brno, Czech Republic
| | - Lucie Bláhová
- RECETOX, Faculty of Science, Masaryk University, Kotlářská 2, 61137 Brno, Czech Republic
| | - Roman Prokeš
- RECETOX, Faculty of Science, Masaryk University, Kotlářská 2, 61137 Brno, Czech Republic; Department of Atmospheric Matter Fluxes and Long-range Transport, Global Change Research Institute of the Czech Academy of Sciences, Bělidla 986/4a, 60300 Brno, Czech Republic
| | - Jakub Ondráček
- Department of Aerosol Chemistry and Physics, Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, Rozvojová 135, 16502 Prague, Czech Republic
| | - Pavel Babica
- RECETOX, Faculty of Science, Masaryk University, Kotlářská 2, 61137 Brno, Czech Republic; Department of Experimental Phycology and Ecotoxicology, Institute of Botany of the Czech Academy of Sciences, Lidická 25/27, 60200 Brno, Czech Republic.
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Mimura M, Koizumi Y, Wada M, Ichijo T, Uchii K, Nasu M. Microbial Water Quality Assessment of Private Wells Using 16S rRNA Gene Amplicon Sequencing with a Nanopore Sequencer. Biol Pharm Bull 2023; 46:263-271. [PMID: 36724954 DOI: 10.1248/bpb.b22-00690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Private wells are used daily worldwide as convenient household water sources. In Japan, where water supply coverage is high, well water is occasionally used for non-potable purposes, such as irrigation and watering. Currently, the main microbiological test of well water is designed to detect Escherichia coli, which is an indicator of fecal contamination, using culture methods. Water use such as watering generates bioaerosols, which may cause airborne infection. However, many causative bacteria of aerosol-derived infections, such as Legionella spp., are difficult to detect using culture methods. Thus, more comprehensive modern assessment is desirable for securing the microbiological quality of well water. Here, the bacterial community structure of five private wells located in different environments was examined using the rapid and portable MinION sequencer, which enabled us to identify bacteria to the species level based on full-length 16S ribosomal RNA (rRNA) gene sequences. The results revealed the differences in the bacterial community structures of water samples from the five wells and detected Legionella pneumophila and Aeromonas hydrophila as new candidate microbial indicators. The comprehensive analysis method used in this study successfully detected bacteria causing opportunistic infections, which are difficult to detect by conventional methods. This approach is expected to be routinely applied in the future as a highly accurate method for assessing the microbiological quality of private well water.
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Affiliation(s)
- Mayumi Mimura
- Environmental Health Section, Osaka Institute of Public Health.,Graduate School of Pharmaceutical Sciences, Osaka Ohtani University
| | - Yoshihiko Koizumi
- Environmental Health Section, Osaka Institute of Public Health.,Graduate School of Pharmaceutical Sciences, Osaka Ohtani University
| | - Masashi Wada
- Research Institute of Environment, Agriculture and Fisheries, Osaka Prefecture
| | - Tomoaki Ichijo
- Faculty of Health and Nutrition, Osaka Shoin Women's University.,Graduate School of Human Sciences, Osaka Shoin Women's University
| | | | - Masao Nasu
- Graduate School of Pharmaceutical Sciences, Osaka Ohtani University
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Catalan-Carrio R, Saez J, Fernández Cuadrado LÁ, Arana G, Basabe-Desmonts L, Benito-Lopez F. Ionogel-based hybrid polymer-paper handheld platform for nitrite and nitrate determination in water samples. Anal Chim Acta 2022; 1205:339753. [DOI: 10.1016/j.aca.2022.339753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 03/04/2022] [Accepted: 03/20/2022] [Indexed: 11/01/2022]
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Saez J, Catalan-Carrio R, Owens RM, Basabe-Desmonts L, Benito-Lopez F. Microfluidics and materials for smart water monitoring: A review. Anal Chim Acta 2021; 1186:338392. [PMID: 34756264 DOI: 10.1016/j.aca.2021.338392] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 03/02/2021] [Accepted: 03/02/2021] [Indexed: 01/03/2023]
Abstract
Water quality monitoring of drinking, waste, fresh and seawaters is of great importance to ensure safety and wellbeing for humans, fauna and flora. Researchers are developing robust water monitoring microfluidic devices but, the delivery of a cost-effective, commercially available platform has not yet been achieved. Conventional water monitoring is mainly based on laboratory instruments or sophisticated and expensive handheld probes for on-site analysis, both requiring trained personnel and being time-consuming. As an alternative, microfluidics has emerged as a powerful tool with the capacity to replace conventional analytical systems. Nevertheless, microfluidic devices largely use conventional pumps and valves for operation and electronics for sensing, that increment the dimensions and cost of the final platforms, reducing their commercialization perspectives. In this review, we critically analyze the characteristics of conventional microfluidic devices for water monitoring, focusing on different water sources (drinking, waste, fresh and seawaters), and their application in commercial products. Moreover, we introduce the revolutionary concept of using functional materials such as hydrogels, poly(ionic liquid) hydrogels and ionogels as alternatives to conventional fluidic handling and sensing tools, for water monitoring in microfluidic devices.
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Affiliation(s)
- Janire Saez
- Microfluidics Cluster UPV/EHU, Analytical Microsystems & Materials for Lab-on-a-Chip (AMMa-LOAC), Group, Analytical Chemistry, University of the Basque Country UPV/EHU, Spain; Bioelectronic Systems Technology Group, Department of Chemical Engineering and Biotechnology, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK.
| | - Raquel Catalan-Carrio
- Microfluidics Cluster UPV/EHU, Analytical Microsystems & Materials for Lab-on-a-Chip (AMMa-LOAC), Group, Analytical Chemistry, University of the Basque Country UPV/EHU, Spain; Microfluidics Cluster UPV/EHU, BIOMICs Microfluidics Group, Lascaray Research Center, University of the Basque Country UPV/EHU, Vitoria-Gasteiz, Spain
| | - Róisín M Owens
- Bioelectronic Systems Technology Group, Department of Chemical Engineering and Biotechnology, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK
| | - Lourdes Basabe-Desmonts
- Microfluidics Cluster UPV/EHU, BIOMICs Microfluidics Group, Lascaray Research Center, University of the Basque Country UPV/EHU, Vitoria-Gasteiz, Spain; Basque Foundation for Science, IKERBASQUE, Spain; Bioaraba Health Research Institute, Microfluidics Cluster UPV/EHU, Vitoria-Gasteiz, Spain; BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940, Leioa, Spain.
| | - Fernando Benito-Lopez
- Microfluidics Cluster UPV/EHU, Analytical Microsystems & Materials for Lab-on-a-Chip (AMMa-LOAC), Group, Analytical Chemistry, University of the Basque Country UPV/EHU, Spain; Bioaraba Health Research Institute, Microfluidics Cluster UPV/EHU, Vitoria-Gasteiz, Spain; BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940, Leioa, Spain.
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Zhang Y, Hu X, Wang Q, Zhang Y. Recent advances in microchip-based methods for the detection of pathogenic bacteria. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.11.033] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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8
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Tokunaga Y, Wakabayashi Y, Yonogi S, Saito M, Yamaguchi N. Microfluidic rapid quantification of
Salmonella enterica serovar
Typhimurium collected from chicken meat using immunomagnetic separation after formaldehyde treatment. Int J Food Sci Technol 2021. [DOI: 10.1111/ijfs.15251] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Yusuke Tokunaga
- Osaka Institute of Public Health 1‐3‐69 Nakamichi, Higashinari‐ku Osaka 537‐0025 Japan
| | - Yuki Wakabayashi
- Osaka Institute of Public Health 1‐3‐69 Nakamichi, Higashinari‐ku Osaka 537‐0025 Japan
| | - Shinya Yonogi
- Osaka Institute of Public Health 1‐3‐69 Nakamichi, Higashinari‐ku Osaka 537‐0025 Japan
| | - Mamoru Saito
- Osaka Research Institute of Industrial Science and Technology 1‐6‐50, Morinomiya, Joto‐ku Osaka 536‐8553 Japan
| | - Nobuyasu Yamaguchi
- Osaka Institute of Public Health 1‐3‐69 Nakamichi, Higashinari‐ku Osaka 537‐0025 Japan
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Shanko ES, Ceelen L, Wang Y, van de Burgt Y, den Toonder J. Enhanced Microfluidic Sample Homogeneity and Improved Antibody-Based Assay Kinetics Due to Magnetic Mixing. ACS Sens 2021; 6:2553-2562. [PMID: 34191498 PMCID: PMC8457298 DOI: 10.1021/acssensors.1c00050] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
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Recent global events have distinctly demonstrated the need for fast diagnostic analysis
of targets in a liquid sample. However, microfluidic lab-on-a-chip devices for
point-of-care diagnostics can suffer from slow analysis due to poor mixing. Here, we
experimentally explore the mixing effect within a microfluidic chamber, as obtained from
superparamagnetic beads exposed to an out-of-plane (vertical) rotating magnetic field.
Various magnetic protocols are explored, and the level of sample homogeneity is measured
by determining the mixing efficiency index. In particular, we introduce a method to
induce effective mixing in a microfluidic chamber by the actuation of the same beads to
perform global swarming behavior, a collective motion of a large number of individual
entities often seen in nature. The microparticle swarming induces high fluid velocities
in initially stagnant fluids, and it can be externally controlled. The method is
pilot-tested using a point-of-care test featuring a bioluminescent assay for the
detection of antibodies. The mixing by the magnetic beads leads to increased assay
kinetics, which indeed reduces the time to sensor readout substantially. Magnetic
microparticle swarming is expected to be beneficial for a wide variety of point-of-care
devices, where fast homogeneity of reagents does play a role.
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Affiliation(s)
- Eriola-Sophia Shanko
- Microsystems Research Section, Department of Mechanical Engineering, and Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, P.O. Box 513, Eindhoven 5600MB, The Netherlands
| | - Lennard Ceelen
- Microsystems Research Section, Department of Mechanical Engineering, Eindhoven University of Technology, Eindhoven 5600MB, The Netherlands
| | - Ye Wang
- Microsystems Research Section, Department of Mechanical Engineering, and Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, P.O. Box 513, Eindhoven 5600MB, The Netherlands
| | - Yoeri van de Burgt
- Microsystems Research Section, Department of Mechanical Engineering, and Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, P.O. Box 513, Eindhoven 5600MB, The Netherlands
| | - Jaap den Toonder
- Microsystems Research Section, Department of Mechanical Engineering, and Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, P.O. Box 513, Eindhoven 5600MB, The Netherlands
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