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Oliveira DA, McLamore ES, Gomes CL. Rapid and label-free Listeria monocytogenes detection based on stimuli-responsive alginate-platinum thiomer nanobrushes. Sci Rep 2022; 12:21413. [PMID: 36496515 PMCID: PMC9741594 DOI: 10.1038/s41598-022-25753-7] [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: 05/13/2022] [Accepted: 12/05/2022] [Indexed: 12/13/2022] Open
Abstract
In this work, we demonstrate the development of a rapid and label-free electrochemical biosensor to detect Listeria monocytogenes using a novel stimulus-response thiomer nanobrush material. Nanobrushes were developed via one-step simultaneous co-deposition of nanoplatinum (Pt) and alginate thiomers (ALG-thiomer). ALG-thiomer/Pt nanobrush platform significantly increased the average electroactive surface area of electrodes by 7 folds and maintained the actuation properties (pH-stimulated osmotic swelling) of the alginate. Dielectric behavior during brush actuation was characterized with positively, neutral, and negatively charged redox probes above and below the isoelectric point of alginate, indicating ALG-thiomer surface charge plays an important role in signal acquisition. The ALG-thiomer platform was biofunctionalized with an aptamer selective for the internalin A protein on Listeria for biosensing applications. Aptamer loading was optimized and various cell capture strategies were investigated (brush extended versus collapsed). Maximum cell capture occurs when the ALG-thiomer/aptamer is in the extended conformation (pH > 3.5), followed by impedance measurement in the collapsed conformation (pH < 3.5). Low concentrations of bacteria (5 CFU mL-1) were sensed from a complex food matrix (chicken broth) and selectivity testing against other Gram-positive bacteria (Staphylococcus aureus) indicate the aptamer affinity is maintained, even at these pH values. The new hybrid soft material is among the most efficient and fastest (17 min) for L. monocytogenes biosensing to date, and does not require sample pretreatment, constituting a promising new material platform for sensing small molecules or cells.
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Affiliation(s)
- Daniela A. Oliveira
- grid.264756.40000 0004 4687 2082Department of Biological and Agricultural Engineering, Texas A&M University, College Station, TX 77843 USA
| | - Eric S. McLamore
- grid.26090.3d0000 0001 0665 0280Agricultural Sciences, Clemson University, Clemson, SC 29631 USA
| | - Carmen L. Gomes
- grid.34421.300000 0004 1936 7312Department of Mechanical Engineering, Iowa State University, Ames, IA 50011 USA
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Sikkema R, Baker K, Zhitomirsky I. Electrophoretic deposition of polymers and proteins for biomedical applications. Adv Colloid Interface Sci 2020; 284:102272. [PMID: 32987293 DOI: 10.1016/j.cis.2020.102272] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2020] [Revised: 09/12/2020] [Accepted: 09/13/2020] [Indexed: 11/19/2022]
Abstract
This review is focused on new electrophoretic deposition (EPD) mechanisms for deposition biomacromolecules, such as biopolymers, proteins and enzymes. Among the rich literature sources of EPD of biopolymers, proteins and enzymes for biomedical applications we selected papers describing new fundamental deposition mechanisms. Such deposition mechanisms are of critical importance for further development of EPD method and its emerging biomedical applications. Our goal is to emphasize innovative ideas which have enriched colloid and interface science of EPD during recent years. We describe various mechanisms of cathodic and anodic EPD of charged biopolymers. Special attention is focused on in-situ chemical modification of biopolymers and crosslinking techniques. Recent innovations in the development of natural and biocompatible charged surfactants and film forming agents are outlined. Among the important advances in this area are the applications of bile acids and salts for EPD of neutral polymers. Such innovations allowed for the successful EPD of various electrically neutral functional polymers for biomedical applications. Particularly important are biosurfactant-polymer interactions, which facilitate dissolution, dispersion, charging, electrophoretic transport and deposit formation. Recent advances in EPD mechanisms addressed the problem of EPD of proteins and enzymes related to their charge reversal at the electrode surface. Conceptually new methods are described, which are based on the use of biopolymer complexes with metal ions, proteins, enzymes and other biomolecules. This review describes new developments in co-deposition of biomacromolecules and future trends in the development of new EPD mechanisms and strategies for biomedical applications.
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Affiliation(s)
- Rebecca Sikkema
- Department of Materials Science and Engineering, McMaster University, Hamilton, ON, Canada
| | - Kayla Baker
- Department of Materials Science and Engineering, McMaster University, Hamilton, ON, Canada
| | - Igor Zhitomirsky
- Department of Materials Science and Engineering, McMaster University, Hamilton, ON, Canada.
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Báez C, Navarro F, Fuenzalida F, Aguirre MJ, Arévalo MC, Afonso M, García C, Ramírez G, Palenzuela JA. Electrical and Electrochemical Behavior of Carbon Paste Electrodes Modified with Ionic Liquids Based in N-Octylpyridinium Bis(Trifluoromethylsulfonyl)Imide. A Theoretical and Experimental Study. Molecules 2019; 24:E3382. [PMID: 31533331 PMCID: PMC6767309 DOI: 10.3390/molecules24183382] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 09/05/2019] [Accepted: 09/10/2019] [Indexed: 11/16/2022] Open
Abstract
In this work, we studied carbon paste electrodes (CPEs) with two kinds of binders: mineral oil or ionic liquids (IL) derived from N-substituted octyl pyridinium bis(trifluoromethylsulfonyl)imide with the substituents H-, CH3-, CN- and CF3-. The work aims to study this series of IL and determine a possible effect of the substituent of the cation in the behavior of the IL as a binder of graphite for obtaining IL-CPEs. The electrochemical response and the electrical behavior were measured by cyclic voltammetry and electrochemical impedance spectroscopy, respectively. Surprisingly, the substituent does not affect the cyclic voltammetry response because in all the cases, high resistance and high capacitive currents were obtained. The best response in terms of conductivity is obtained by CPE. In the case of impedance measurements, the substituent does not cause differences, and in all the cases, the IL-CPEs show nearly the same responses. CPE shows lower capacitance and higher resistance for diffusion compared to the IL-CPEs due to his lower porosity. The high resistance showed by the IL-CPEs by cyclic voltammetry can be attributed to poorly intermolecular forces among graphite, water, electrolyte, and ILs as demonstrated by theoretical calculations.
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Affiliation(s)
- Carla Báez
- Departamento de Química de Los Materiales, Universidad de Santiago de Chile, Av. B. O'Higgins 3363, Estación Central, Santiago 9170022, Chile.
- NM MultiMat, Instituto de Ciencias Físicas y Matemáticas, Facultad de Ciencias, Universidad Austral de Chile, Campus Isla Teja s/n, 5110566 Valdivia, Chile.
| | - Freddy Navarro
- Departamento de Química de Los Materiales, Universidad de Santiago de Chile, Av. B. O'Higgins 3363, Estación Central, Santiago 9170022, Chile.
| | - Francesca Fuenzalida
- Instituto de Ciencias Naturales, Universidad de Las Américas, Av. 5 de Abril 0620, Maipú, Santiago 9251454, Chile.
| | - María J Aguirre
- Departamento de Química de Los Materiales, Universidad de Santiago de Chile, Av. B. O'Higgins 3363, Estación Central, Santiago 9170022, Chile.
| | - M Carmen Arévalo
- Departamento de Química Física, Instituto Universitario de Materiales y Nanotecnología, Universidad de La Laguna, Avda. Astrofísico F. Sánchez s/n, 38071 La Laguna, Spain.
| | - María Afonso
- Departamento de Química Orgánica, Instituto Universitario de Bio-orgánica Antonio González, Universidad de La Laguna, 38206 La Laguna, Spain.
| | - Camilo García
- Departamento de Ciencias Biológicas y Químicas, Núcleo de Bioproductos y Materiales Avanzados, Universidad Católica de Temuco, Avenida Rudecindo Ortega 02950, Temuco 4781312, Chile.
| | - Galo Ramírez
- Departamento de Química Inorgánica, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Santiago 7820436, Chile.
| | - J Antonio Palenzuela
- Departamento de Química Orgánica, Instituto Universitario de Bio-orgánica Antonio González, Universidad de La Laguna, 38206 La Laguna, Spain.
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