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Gannesen AV, Ziganshin RH, Ovcharova MA, Nevolina ED, Klimko AI, Martyanov SV, Plakunov VK. Epinephrine Affects Ribosomes, Cell Division, and Catabolic Processes in Micrococcus luteus Skin Strain C01: Revelation of the Conditionally Extensive Hormone Effect Using Orbitrap Mass Spectrometry and Proteomic Analysis. Microorganisms 2023; 11:2181. [PMID: 37764026 PMCID: PMC10535722 DOI: 10.3390/microorganisms11092181] [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: 06/20/2023] [Revised: 08/15/2023] [Accepted: 08/24/2023] [Indexed: 09/29/2023] Open
Abstract
In the current study, extensive Orbitrap mass spectrometry analysis was conducted for skin strain Micrococcus luteus C01 planktonic cultures and biofilms after 24 h and 72 h of incubation either in the presence of epinephrine or without any implementations. The investigation revealed the complex and conditionally extensive effect of epinephrine at concentrations closer to normal blood plasma concentrations on both planktonic cultures and biofilms of skin strain M. luteus C01. The concentrations of hundreds of proteins changed during the shift from planktonic growth mode to biofilm and hundreds of proteins were downregulated or upregulated in the presence of epinephrine. Ribosomal, TCA, and cell division proteins appear to be the most altered in their amounts in the presence of the hormone. Potentially, the regulatory mechanism of this process is connected with c-di-GMP and histidine kinases, which were affected by epinephrine in different samples. The phenomenon of epinephrine-based biofilm regulation in M. luteus C01 has wide implications for microbial endocrinology and other research areas.
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Affiliation(s)
- Andrei V. Gannesen
- Federal Research Center “Fundamentals of Biotechnology”, Russian Academy of Sciences, 119071 Moscow, Russia; (M.A.O.); (E.D.N.); (A.I.K.); (S.V.M.); (V.K.P.)
| | - Rustam H. Ziganshin
- Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia;
| | - Maria A. Ovcharova
- Federal Research Center “Fundamentals of Biotechnology”, Russian Academy of Sciences, 119071 Moscow, Russia; (M.A.O.); (E.D.N.); (A.I.K.); (S.V.M.); (V.K.P.)
| | - Ekaterina D. Nevolina
- Federal Research Center “Fundamentals of Biotechnology”, Russian Academy of Sciences, 119071 Moscow, Russia; (M.A.O.); (E.D.N.); (A.I.K.); (S.V.M.); (V.K.P.)
| | - Alena I. Klimko
- Federal Research Center “Fundamentals of Biotechnology”, Russian Academy of Sciences, 119071 Moscow, Russia; (M.A.O.); (E.D.N.); (A.I.K.); (S.V.M.); (V.K.P.)
| | - Sergey V. Martyanov
- Federal Research Center “Fundamentals of Biotechnology”, Russian Academy of Sciences, 119071 Moscow, Russia; (M.A.O.); (E.D.N.); (A.I.K.); (S.V.M.); (V.K.P.)
| | - Vladimir K. Plakunov
- Federal Research Center “Fundamentals of Biotechnology”, Russian Academy of Sciences, 119071 Moscow, Russia; (M.A.O.); (E.D.N.); (A.I.K.); (S.V.M.); (V.K.P.)
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Guimarães ML, Júnior MAB, de Almeida VM, Pereira WVS. MALDI-TOF as a tool for microbiological monitoring in areas considered aseptic. Braz J Microbiol 2023; 54:761-768. [PMID: 37160839 PMCID: PMC10235220 DOI: 10.1007/s42770-023-00987-3] [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: 04/12/2022] [Accepted: 04/25/2023] [Indexed: 05/11/2023] Open
Abstract
To maintain asepsis in production environments, contamination must be constantly controlled. To this end, microbiological monitoring is constantly used with the objective of evaluating the incidence of microorganisms prevalent in the sampling of air, surface, and people, in the area of an environment considered aseptic, isolated, and identified using the rapid and automated phenotypic microbiological methodology, highlighting the MALDI-TOF mass spectrometry analysis technique (MS), being identified at the level of genus and/or species. For that purpose, microbiological control of environmental monitoring of environments considered aseptic in a pharmaceutical industry was conducted for 12 months. The isolated microorganisms were identified using the mass spectrometry identification method (MALDI-TOF). In area classification A, the most prevalent microorganisms were bacteria in the sampling person. The microbial population was composed of bacteria of the genus Micrococcus sp. and Staphylococcus sp. Based on the results, it is possible to observe that in an environment where the process requires human operations, possible microbial contamination is inevitable and requires the identification of microorganisms at least at the level of species and/or genus. The microorganisms identified and found in the sampling of the aseptic environment must be evaluated with frequency to ensure that the productive environment guarantees the quality of the product produced.
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Affiliation(s)
- Marlu Lopes Guimarães
- Programa de Pós-Graduação Em Microbiologia, Centro Universitário Funorte, Montes Claros, Minas Gerais, Brazil
| | | | - Vitor Martins de Almeida
- Instituto de Pesquisas de Produtos Naturais Walter Mors - Universidade Federal Do Rio de Janeiro, Rio de Janeiro, Brazil
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3
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Dubey A, Kumar A, Khan ML, Payasi DK. Plant Growth-promoting and Bio-control Activity of Micrococcus luteus Strain AKAD 3-5 Isolated from the Soybean (Glycine max (L.) Merr.) Rhizosphere. Open Microbiol J 2021. [DOI: 10.2174/1874285802115010188] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Background:
Applications of bioinoculants for improving crop productivity may be an eco-friendly alternative to chemical fertilizers. Rhizosphere or soil-inhabiting beneficial microbes can enhance plant growth and productivity through direct and indirect mechanisms, i.e., phosphate solubilization, nutrient acquisition, phytohormone production, etc.
Objective:
This study is based on the hypothesis that diseases resistant plants can act as a source of potential microbes that can have good plant growth-promoting traits and bio-control potential.
Methods:
In this study, we have isolated the rhizobacterial strains (AKAD 2-1, AKAD 2-10, AKAD 3-5, AKAD 3-9) from the rhizosphere of a disease-resistant variety of soybean (JS-20-34) (Glycine max (L.) Merr.). These bacterial strains were further screened for various plant growth-promoting traits (phosphate solubilization, indole acetic acid (IAA), ammonia, biofilm, HCN, Exopolysaccharide (EPS), and enzyme production activity (catalase, cellulase, and chitinase)).
Results:
Among four, only bacterial strain AKAD 3-5 has shown plant-growth-promoting and biocontrol (98%) activity against Fusarium oxysporum. Morphological, biochemical, and molecular characterization (16S rRNA) revealed that this rhizobacterial isolate AKAD 3-5 closely resembles Micrococcus luteus (Gene bank accession: MH304279).
Conclusion:
Here, we conclude that this strain can be utilized to promote soybean growth under varied soil stress conditions.
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Burgos-Garay ML, Santiago AJ, Kartforosh L, Kotay S, Donlan RM. Supplemental nutrients stimulate the amplification of carbapenemase-producing Klebsiella pneumoniae (CPKP) in a sink drain in vitro biofilm reactor model. BIOFOULING 2021; 37:465-480. [PMID: 34210218 DOI: 10.1080/08927014.2021.1915998] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 03/25/2021] [Accepted: 04/06/2021] [Indexed: 06/13/2023]
Abstract
Liquid wastes (LW) disposed in hospital handwashing sinks may affect colonization of sink P-traps by carbapenemase-producing Klebsiella pneumoniae (CPKP), causing CPKP dispersal into the patient care environment. This study aimed to determine the effect of LW on biofilm formation and CPKP colonization in a P-Trap model (PTM). PTMs containing polymicrobial biofilms grown in autoclaved municipal tap water (ATW) supplemented with 5% dextrose in water (D5W), nutritional shake (Shake), sugar-based soft drink (Soda), or ATW were inoculated with K. pneumoniae ST258 KPC+ (ST258) or K. pneumoniae CAV1016 (CAV1016) and sampled after 7, 14, and 21 d. Biofilm bio-volume, mean thickness, and heterotrophic plate counts were significantly reduced and roughness coefficient significantly increased by Soda compared with D5W, Shake, or ATW. CPKP were significantly reduced by Soda but significantly amplified by D5W (ST258; CAV1016, 7 d) and Shake (ST258) suggesting that reducing LW disposal in sinks may reduce CPKP dispersal into patient care environments.
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Affiliation(s)
- María L Burgos-Garay
- Division of Healthcare Quality Promotion, Clinical and Environmental Microbiology Branch, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Ariel J Santiago
- Division of Healthcare Quality Promotion, Clinical and Environmental Microbiology Branch, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Leila Kartforosh
- Division of Healthcare Quality Promotion, Clinical and Environmental Microbiology Branch, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Shireen Kotay
- Division of Infectious Diseases and International Health, Department of Medicine, University of Virginia Health System, Charlottesville, VA, USA
| | - Rodney M Donlan
- Division of Healthcare Quality Promotion, Clinical and Environmental Microbiology Branch, Centers for Disease Control and Prevention, Atlanta, GA, USA
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5
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Cultivation-Based Quantification and Identification of Bacteria at Two Hygienic Key Sides of Domestic Washing Machines. Microorganisms 2021; 9:microorganisms9050905. [PMID: 33922491 PMCID: PMC8146927 DOI: 10.3390/microorganisms9050905] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 04/18/2021] [Accepted: 04/21/2021] [Indexed: 12/28/2022] Open
Abstract
Detergent drawer and door seal represent important sites for microbial life in domestic washing machines. Interestingly, quantitative data on the microbial contamination of these sites is scarce. Here, 10 domestic washing machines were swab-sampled for subsequent bacterial cultivation at four different sampling sites: detergent drawer and detergent drawer chamber, as well as the top and bottom part of the rubber door seal. The average bacterial load over all washing machines and sites was 2.1 ± 1.0 × 104 CFU cm−2 (average number of colony forming units ± standard error of the mean (SEM)). The top part of the door seal showed the lowest contamination (11.1 ± 9.2 × 101 CFU cm−2), probably due to less humidity. Out of 212 isolates, 178 (84%) were identified on the genus level, and 118 (56%) on the species level using matrix-assisted laser desorption/ionization (MALDI) Biotyping, resulting in 29 genera and 40 identified species across all machines. The predominant bacterial genera were Staphylococcus and Micrococcus, which were found at all sites. 22 out of 40 species were classified as opportunistic pathogens, emphasizing the need for regular cleaning of the investigated sites.
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Danilova ND, Solovyeva TV, Mart’yanov SV, Zhurina MV, Gannesen AV. Stimulatory Effect of Epinephrine on Biofilms of Micrococcus luteus C01. Microbiology (Reading) 2020. [DOI: 10.1134/s0026261720040049] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Sassa F, Biswas GC, Suzuki H. Microfabricated electrochemical sensing devices. LAB ON A CHIP 2020; 20:1358-1389. [PMID: 32129358 DOI: 10.1039/c9lc01112a] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Electrochemistry provides possibilities to realize smart microdevices of the next generation with high functionalities. Electrodes, which constitute major components of electrochemical devices, can be formed by various microfabrication techniques, and integration of the same (or different) components for that purpose is not difficult. Merging this technique with microfluidics can further expand the areas of application of the resultant devices. To augment the development of next generation devices, it will be beneficial to review recent technological trends in this field and clarify the directions required for moving forward. Even when limiting the discussion to electrochemical microdevices, a variety of useful techniques should be considered. Therefore, in this review, we attempted to provide an overview of all relevant techniques in this context in the hope that it can provide useful comprehensive information.
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Affiliation(s)
- Fumihiro Sassa
- Graduate School of Information Science and Electrical Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
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8
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Samantaray K, Mishra SR, Purohit G, Mohanty PS. AC Electric Field Mediated Assembly of Bacterial Tetrads. ACS OMEGA 2020; 5:5881-5887. [PMID: 32226868 PMCID: PMC7098059 DOI: 10.1021/acsomega.9b04124] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 02/25/2020] [Indexed: 05/10/2023]
Abstract
Understanding spatiotemporal organization in bacteria under an external AC electric field is not only very interesting from a perspective of studying assembly and disassembly in a model biofilm but also provides insight into the intricate role of anisotropic interaction with bacterial dynamics that can generate interesting complex structures. In the current study, using confocal microscopy, we demonstrate such complex assemblies of monodisperse tetrad clusters of Micrococcus luteus, an environmental bacterium synthesized under a controlled growth condition. These clusters under the AC field produce a range of interesting structures such as chains, double helix, and bundles, which are instantaneously reversible when the field is switched off. Our studies can provide important insights into the natural organization of the clustered bacterium (with relevance in biofilm-like states) and generate strategies for biomaterial fabrication with a switchable functionality.
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Affiliation(s)
- Kunal Samantaray
- School of Biotechnology and School of Chemical Technology, Kalinga Institute of Industrial Technology (KIIT), Deemed to be University, Bhubaneswar 751024, India
| | - Samir R Mishra
- School of Biotechnology and School of Chemical Technology, Kalinga Institute of Industrial Technology (KIIT), Deemed to be University, Bhubaneswar 751024, India
| | - Gopal Purohit
- School of Biotechnology and School of Chemical Technology, Kalinga Institute of Industrial Technology (KIIT), Deemed to be University, Bhubaneswar 751024, India
| | - Priti S Mohanty
- School of Biotechnology and School of Chemical Technology, Kalinga Institute of Industrial Technology (KIIT), Deemed to be University, Bhubaneswar 751024, India
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Baraban L, Ibarlucea B, Baek E, Cuniberti G. Hybrid Silicon Nanowire Devices and Their Functional Diversity. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1900522. [PMID: 31406669 PMCID: PMC6685480 DOI: 10.1002/advs.201900522] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 04/25/2019] [Indexed: 05/06/2023]
Abstract
In the pool of nanostructured materials, silicon nanostructures are known as conventionally used building blocks of commercially available electronic devices. Their application areas span from miniaturized elements of devices and circuits to ultrasensitive biosensors for diagnostics. In this Review, the current trends in the developments of silicon nanowire-based devices are summarized, and their functionalities, novel architectures, and applications are discussed from the point of view of analog electronics, arisen from the ability of (bio)chemical gating of the carrier channel. Hybrid nanowire-based devices are introduced and described as systems decorated by, e.g., organic complexes (biomolecules, polymers, and organic films), aimed to substantially extend their functionality, compared to traditional systems. Their functional diversity is explored considering their architecture as well as areas of their applications, outlining several groups of devices that benefit from the coatings. The first group is the biosensors that are able to represent label-free assays thanks to the attached biological receptors. The second group is represented by devices for optoelectronics that acquire higher optical sensitivity or efficiency due to the specific photosensitive decoration of the nanowires. Finally, the so-called new bioinspired neuromorphic devices are shown, which are aimed to mimic the functions of the biological cells, e.g., neurons and synapses.
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Affiliation(s)
- Larysa Baraban
- Max Bergmann Center of Biomaterials and Institute for Materials ScienceTechnische Universität Dresden01062DresdenGermany
- Center for Advancing Electronics Dresden (CfAED) TU Dresden01062DresdenGermany
| | - Bergoi Ibarlucea
- Max Bergmann Center of Biomaterials and Institute for Materials ScienceTechnische Universität Dresden01062DresdenGermany
- Center for Advancing Electronics Dresden (CfAED) TU Dresden01062DresdenGermany
| | - Eunhye Baek
- Max Bergmann Center of Biomaterials and Institute for Materials ScienceTechnische Universität Dresden01062DresdenGermany
- Center for Advancing Electronics Dresden (CfAED) TU Dresden01062DresdenGermany
| | - Gianaurelio Cuniberti
- Max Bergmann Center of Biomaterials and Institute for Materials ScienceTechnische Universität Dresden01062DresdenGermany
- Center for Advancing Electronics Dresden (CfAED) TU Dresden01062DresdenGermany
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10
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Levashov PA, Matolygina DA, Ovchinnikova ED, Adamova IY, Dmitrieva OA, Pokrovsky NS, Eremeev NL. A Novel Method of Covalent Lysozyme Immobilization for the Development of Materials for Medical Applications. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2019. [DOI: 10.1134/s1068162019020055] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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11
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Zhang X, Jiang X, Hao Z, Qu K. Advances in online methods for monitoring microbial growth. Biosens Bioelectron 2018; 126:433-447. [PMID: 30472440 DOI: 10.1016/j.bios.2018.10.035] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Accepted: 10/16/2018] [Indexed: 12/24/2022]
Abstract
Understanding the characteristics of microbial growth is of great significance to many fields including in scientific research, the food industry, health care, and agriculture. Many methods have been established to characterize the process of microbial growth. Online and automated methods, in which sample transfer is avoided, are popular because they can facilitate the development of simple, safe, and effective growth monitoring. This review focuses on advances in online monitoring methods over the last decade (2008-2018). We specifically focus on optic- and electrochemistry-based techniques, either through contact measurements or contactless measurement. Strengths and weaknesses of each set of methods are described and we also speculate on forthcoming trends in the field.
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Affiliation(s)
- Xuzhi Zhang
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, 106, Nanjing Rd, Shinan District, Qingdao 266071, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266235, China
| | - Xiaoyu Jiang
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, 106, Nanjing Rd, Shinan District, Qingdao 266071, China; College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China
| | - Zhihui Hao
- School of Chemistry and Pharmaceutical Sciences, Qingdao Agriculture University, 700, Changcheng Rd, Chengyang District, Qingdao 266109, China.
| | - Keming Qu
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, 106, Nanjing Rd, Shinan District, Qingdao 266071, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266235, China.
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12
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Funari R, Bhalla N, Chu KY, Söderström B, Shen AQ. Nanoplasmonics for Real-Time and Label-Free Monitoring of Microbial Biofilm Formation. ACS Sens 2018; 3:1499-1509. [PMID: 30062880 DOI: 10.1021/acssensors.8b00287] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Microbial biofilms possess intrinsic resistance against conventional antibiotics and cleaning procedures; thus, a better understanding of their complex biological structures is crucial in both medical and industrial applications. Existing laboratory methodologies have focused on macroscopic and mostly indirect characterization of mechanical and microbiological properties of biofilms adhered on a given substrate. However, the kinetics underlying the biofilm formation is not well understood, while such information is critical to understanding how drugs and chemicals influence the biofilm formation. Herein, we report the use of localized surface plasmon resonance (LSPR) for real-time, label-free monitoring of E. coli biofilm assembly on a nanoplasmonic substrate consisting of gold mushroom-like structures. Our LSPR sensor is able to capture the signatures of biofilm formation in real-time by measuring the wavelength shift in the LSPR resonance peak with high temporal resolution. We employ this sensor feature to elucidate how biofilm formation is affected by different drugs, including conventional antibiotics (kanamycin and ampicillin) as well as rifapentine, a molecule preventing cell adhesion yet barely affecting bacterial viability and vitality. Due to its flexibility and simplicity, our LSPR based platform can be used on a wide variety of clinically relevant bacteria, thus representing a valuable tool in biofilm characterization and drug screening.
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13
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Modena MM, Chawla K, Misun PM, Hierlemann A. Smart Cell Culture Systems: Integration of Sensors and Actuators into Microphysiological Systems. ACS Chem Biol 2018; 13:1767-1784. [PMID: 29381325 PMCID: PMC5959007 DOI: 10.1021/acschembio.7b01029] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Technological advances in microfabrication techniques in combination with organotypic cell and tissue models have enabled the realization of microphysiological systems capable of recapitulating aspects of human physiology in vitro with great fidelity. Concurrently, a number of analysis techniques has been developed to probe and characterize these model systems. However, many assays are still performed off-line, which severely compromises the possibility of obtaining real-time information from the samples under examination, and which also limits the use of these platforms in high-throughput analysis. In this review, we focus on sensing and actuation schemes that have already been established or offer great potential to provide in situ detection or manipulation of relevant cell or tissue samples in microphysiological platforms. We will first describe methods that can be integrated in a straightforward way and that offer potential multiplexing and/or parallelization of sensing and actuation functions. These methods include electrical impedance spectroscopy, electrochemical biosensors, and the use of surface acoustic waves for manipulation and analysis of cells, tissue, and multicellular organisms. In the second part, we will describe two sensor approaches based on surface-plasmon resonance and mechanical resonators that have recently provided new characterization features for biological samples, although technological limitations for use in high-throughput applications still exist.
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Affiliation(s)
- Mario M. Modena
- ETH Zürich, Department of Biosystems Science and Engineering,
Bio Engineering Laboratory, Basel, Switzerland
| | - Ketki Chawla
- ETH Zürich, Department of Biosystems Science and Engineering,
Bio Engineering Laboratory, Basel, Switzerland
| | - Patrick M. Misun
- ETH Zürich, Department of Biosystems Science and Engineering,
Bio Engineering Laboratory, Basel, Switzerland
| | - Andreas Hierlemann
- ETH Zürich, Department of Biosystems Science and Engineering,
Bio Engineering Laboratory, Basel, Switzerland
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14
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Shen H, Qu F, Xia Y, Jiang X. Straightforward and Ultrastable Surface Modification of Microfluidic Chips with Norepinephrine Bitartrate Improves Performance in Immunoassays. Anal Chem 2018; 90:3697-3702. [PMID: 29478312 DOI: 10.1021/acs.analchem.7b05186] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Polymers are commonly used materials for microfluidic chip fabrication, because they are standardized in fabrication and low in cost. However, most polymeric materials that are readily fabricated on the industrial scale are hydrophobic, which is inconvenient for the injection and flow of the aqueous solution, resulting in poor analytical performance for biochemical assays. In this work, we present a straightforward and ultrastable surface modification process for polymeric chips. A one-step modification by using norepinephrine bitartrate monohydrate as a modification reagent is completed at room temperature. The hydrophilicity of the polymeric surfaces increases dramatically. Surface modification is stable for at least 2.5 years, allowing for autoinjection of aqueous solution into the channels. The chips are applied in the immunoassay of alpha-fetoprotein (AFP). The low nonspecific adsorption after modification results in significantly decreased background noise, optimized signal-to-noise ratios (SNR), and dramatically enhanced reproducibility of the immunoassay. Thirty clinical human serum samples are analyzed; these results strongly correlated with the values obtained using commercial test kits. We anticipate that this surface modification method can be used for immunoassay devices in analytical and biosensing technology.
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Affiliation(s)
- Haiying Shen
- School of Life Science , Beijing Institute of Technology , Beijing 100081 , People's Republic of China.,Beijing Engineering Research Center for BioNanotechnology & CAS Key Laboratory for Biological Effects of Nano-materials Nanosafety , National Center for Nanoscience and Technology , Beijing 100190 , People's Republic of China
| | - Feng Qu
- School of Life Science , Beijing Institute of Technology , Beijing 100081 , People's Republic of China
| | - Yong Xia
- Department of Clinical Laboratory , Third Affiliated Hospital of Guangzhou Medical University , Guangzhou 510150 , People's Republic of China
| | - Xingyu Jiang
- Beijing Engineering Research Center for BioNanotechnology & CAS Key Laboratory for Biological Effects of Nano-materials Nanosafety , National Center for Nanoscience and Technology , Beijing 100190 , People's Republic of China.,Department of Clinical Laboratory , Third Affiliated Hospital of Guangzhou Medical University , Guangzhou 510150 , People's Republic of China.,University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
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15
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Ibarlucea B, Rim T, Baek CK, de Visser JAGM, Baraban L, Cuniberti G. Nanowire sensors monitor bacterial growth kinetics and response to antibiotics. LAB ON A CHIP 2017; 17:4283-4293. [PMID: 29119168 DOI: 10.1039/c7lc00807d] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Miniaturized and cost-efficient methods aiming at high throughput analysis of microbes are of great importance for the surveillance and control of infectious diseases and the related issue of antimicrobial resistance. Here we demonstrate a miniature nanosensor based on a honeycomb-patterned silicon nanowire field effect transistor (FET) capable of detection of bacterial growth and antibiotic response in microbiologically relevant nutrient media. We determine the growth kinetics and metabolic state of Escherichia coli cells in undiluted media via the quantification of changes in the source-drain current caused by varying pH values. Furthermore, by measuring the time dependent profile of pH change for bacterial cultures treated with antibiotics, we demonstrate for the first time the possibility of electrically distinguishing between bacteriostatic and bactericidal drug effects. We believe that the use of such nanoscopic FET devices enables addressing parameters that are not easily accessible by conventional optical methods in a label-free format, i.e. monitoring of microbial metabolic activity or stress response.
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Affiliation(s)
- B Ibarlucea
- Institute of Materials Science and Max Bergmann Center of Biomaterials, and, Center for Advancing Electronics Dresden (CfAED), Technische Universität Dresden, Budapester Str. 27, 01069, Dresden, Germany.
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16
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Puchner SE, Döring K, Staats K, Böhler C, Lass R, Hirschl AM, Presterl E, Windhager R, Holinka J. Sonication culture improves microbiological diagnosis of modular megaprostheses. J Orthop Res 2017; 35:1383-1387. [PMID: 27572456 DOI: 10.1002/jor.23406] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Accepted: 08/25/2016] [Indexed: 02/04/2023]
Abstract
Modular megaprostheses are known for high infection rates followed by high rates of revisions. Microbial biofilms growing adherently on prosthetic surfaces may inhibit the detection of the pathogens causing prosthetic joint infections. We sought to answer the following questions: Does sonication culture (SC) improve the microbiological diagnosis of periprosthetic infections of megaprostheses compared to conventional tissue culture (TC)? Which pathogens were detected on the surface of megaprostheses with either SC or TC and do the findings help to identify low-grade infections? Included were 31 patients with modular megaprostheses, whose implant had been explanted due to suspected joint infection or revision surgery. SCs were performed according to the protocol by Trampuz et al. The diagnosis of infection was evaluated according to the definition of the Musculoskeletal Infection Society. The sensitivity of SC was 91.3% compared to 52.2% for TC and the specificity was 100% for SC and TC (p = 0.004). Under preoperative antibiotic therapy, the sensitivity of SC was 83.3% while the sensitivity of TC was 50%. Without preoperative antibiotic therapy the sensitivity of SC was 100% compared to 54.5% for TC. In nine cases, SCs detected microorganisms, while TC was negative. Detected bacteria were Staphylococcus epidermidis in four, Micrococcus species in one, Finegoldia magna in one, Brevibacterium casei in one, Pseudomonas fluorescens in one, and Enterococcus faecium in one. SC is a reliable method for dislodging pathogens from orthopedic implants. The SC of modular megaprostheses showed significantly higher pathogen detection than the periprosthetic TC, especially for low virulence pathogens. © 2016 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 35:1383-1387, 2017.
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Affiliation(s)
- Stephan E Puchner
- Department of Orthopaedics, Medical University of Vienna, Waehringer Guertel 18-20, Vienna, 1090, Austria
| | - Kevin Döring
- Department of Orthopaedics, Medical University of Vienna, Waehringer Guertel 18-20, Vienna, 1090, Austria
| | - Kevin Staats
- Department of Orthopaedics, Medical University of Vienna, Waehringer Guertel 18-20, Vienna, 1090, Austria
| | - Christoph Böhler
- Department of Orthopaedics, Medical University of Vienna, Waehringer Guertel 18-20, Vienna, 1090, Austria
| | - Richard Lass
- Department of Orthopaedics, Medical University of Vienna, Waehringer Guertel 18-20, Vienna, 1090, Austria
| | - Alexander M Hirschl
- Department of Clinical Microbiology, Clinical Institute of Hygiene and Medical Microbiology, Medical University of Vienna, Waehringer Guertel 18-20, Vienna, 1090, Austria
| | - Elisabeth Presterl
- Deparment of Infection Control and Hospital Epidemiology, Medical University of Vienna, Waehringer Guertel 18-20, Vienna, 1090, Austria
| | - Reinhard Windhager
- Department of Orthopaedics, Medical University of Vienna, Waehringer Guertel 18-20, Vienna, 1090, Austria
| | - Johannes Holinka
- Department of Orthopaedics, Medical University of Vienna, Waehringer Guertel 18-20, Vienna, 1090, Austria
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Yamada A, Mohri S, Nakamura M, Naruse K. A simple method for decreasing the liquid junction potential in a flow-through-type differential pH sensor probe consisting of pH-FETs by exerting spatiotemporal control of the liquid junction. SENSORS 2015; 15:7898-912. [PMID: 25835300 PMCID: PMC4431306 DOI: 10.3390/s150407898] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Revised: 03/24/2015] [Accepted: 03/25/2015] [Indexed: 11/21/2022]
Abstract
The liquid junction potential (LJP), the phenomenon that occurs when two electrolyte solutions of different composition come into contact, prevents accurate measurements in potentiometry. The effect of the LJP is usually remarkable in measurements of diluted solutions with low buffering capacities or low ion concentrations. Our group has constructed a simple method to eliminate the LJP by exerting spatiotemporal control of a liquid junction (LJ) formed between two solutions, a sample solution and a baseline solution (BLS), in a flow-through-type differential pH sensor probe. The method was contrived based on microfluidics. The sensor probe is a differential measurement system composed of two ion-sensitive field-effect transistors (ISFETs) and one Ag/AgCl electrode. With our new method, the border region of the sample solution and BLS is vibrated in order to mix solutions and suppress the overshoot after the sample solution is suctioned into the sensor probe. Compared to the conventional method without vibration, our method shortened the settling time from over two min to 15 s and reduced the measurement error by 86% to within 0.060 pH. This new method will be useful for improving the response characteristics and decreasing the measurement error of many apparatuses that use LJs.
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Affiliation(s)
- Akira Yamada
- Department of Mechanical Engineering, Faculty of Engineering, Aichi Institute of Technology, 1247 Yachigusa, Yakusa Cho, Toyota City, Aichi Prefecture 470-0392, Japan.
- Cardiovascular Physiology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama Prefecture 700-8558, Japan.
| | - Satoshi Mohri
- Cardiovascular Physiology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama Prefecture 700-8558, Japan.
- First Department of Physiology, Kawasaki Medical School, 577 Matsushima, Kurashiki-City, Okayama Prefecture 701-0192, Japan.
| | - Michihiro Nakamura
- Cardiovascular Physiology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama Prefecture 700-8558, Japan.
| | - Keiji Naruse
- Cardiovascular Physiology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama Prefecture 700-8558, Japan.
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Lemos M, Gomes I, Mergulhão F, Melo L, Simões M. The effects of surface type on the removal of Bacillus cereus and Pseudomonas fluorescens single and dual species biofilms. FOOD AND BIOPRODUCTS PROCESSING 2015. [DOI: 10.1016/j.fbp.2014.08.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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