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Pasquardini L, Cennamo N, Arcadio F, Perri C, Chiodi A, D'agostino G, Zeni L. Immuno-SPR biosensor for the detection of Brucella abortus. Sci Rep 2023; 13:22832. [PMID: 38129569 PMCID: PMC10739931 DOI: 10.1038/s41598-023-50344-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 12/19/2023] [Indexed: 12/23/2023] Open
Abstract
A proof of principle biosensor for the Brucella abortus recognition onsite is presented. The system is based on a plasmonic optical fiber probe functionalized with an oriented antibody layer immobilized on a short polyethyleneglycol (PEG) interface through carbodiimide chemistry and protein G as an intermediate layer. The biosensor is inserted in a holder built in 3D printing technology, obtaining a custom holder useful for housing the sample to be measured and the equipment. The removable sensor chip is a low-cost Surface Plasmon Resonance (SPR) platform based on D-shaped plastic optical fibers (POFs), built-in in 3D printed connectors, used here for the first time to detect bacteria via a bio-receptor layer specific for its membrane protein. The performances of the biosensor in Brucella abortus recognition are tested by using two different SPR-POF probes combined with the same bio-receptor layer. The best sensor configuration has presented a sensitivity at low concentrations of one order of magnitude greater than the other. A limit of detection (LoD) of 2.8 bacteria/mL is achieved well competitive with other systems but without the need for amplification or special sample treatments. Specificity has been tested using Salmonella bacteria, and reproducibility, regenerability and stability are moreover evaluated. These experimental results pave the way for building an efficient and specific biosensor system for Brucella abortus detection onsite and in a few minutes. Moreover, the proposed POF-based SPR biosensor device, with respect to the already available technologies, could be a Point-of-care-test (POCT), simple to use, small-size and portable, low-cost, don't necessary of a microfluidic system, and can be connected to the Internet (IoT).
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Affiliation(s)
- Laura Pasquardini
- Indivenire Srl, Via Sommarive 18, 38123, Trento, Italy.
- Department of Engineering, University of Campania "Luigi Vanvitelli", Via Roma 29, 81031, Aversa, Italy.
| | - Nunzio Cennamo
- Department of Engineering, University of Campania "Luigi Vanvitelli", Via Roma 29, 81031, Aversa, Italy
| | - Francesco Arcadio
- Department of Engineering, University of Campania "Luigi Vanvitelli", Via Roma 29, 81031, Aversa, Italy
| | - Chiara Perri
- Department of Engineering, University of Campania "Luigi Vanvitelli", Via Roma 29, 81031, Aversa, Italy
- Moresense Srl, Filarete Foundation, Viale Ortles 22/4, 20139, Milan, Italy
| | - Alessandro Chiodi
- Moresense Srl, Filarete Foundation, Viale Ortles 22/4, 20139, Milan, Italy
| | | | - Luigi Zeni
- Department of Engineering, University of Campania "Luigi Vanvitelli", Via Roma 29, 81031, Aversa, Italy.
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Pasquardini L, Vanzetti L, Canteri R, Cennamo N, Arcadio F, Perri C, D'Agostino G, Pitruzzella R, Rovida R, Chiodi A, Zeni L. Optimization of the immunorecognition layer towards Brucella sp. on gold surface for SPR platform. Colloids Surf B Biointerfaces 2023; 231:113577. [PMID: 37797466 DOI: 10.1016/j.colsurfb.2023.113577] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 08/08/2023] [Accepted: 09/30/2023] [Indexed: 10/07/2023]
Abstract
A successful immunosensor is characterized by a proper antibody immobilization and orientation in order to enhance the antigen recognition. In this work, a thorough characterization of the antibody functionalized gold surface is performed to set up the best conditions to implement in an optical platform for the detection of Brucella sp. Two different strategies are evaluated, based on a random immobilization and on an oriented one: a direct antibody immobilization on carboxylic mixed polyethylene (PEG) self-assembled monolayer (SAM) or only carboxylic PEG SAM interface is compared to an oriented immobilization on a layer of protein G on the same PEG SAM interfaces. X-ray Photoelectron Spectroscopy (XPS), Time of Flight Secondary Ion Mass Spectrometry (ToF-SIMS) and contact angle (CA) are used to chemically characterize the gold functionalized surface and ToF-SIMS is also used to confirm the right antibody orientation. Optical characterization is applied to monitor the functionalization steps and fluorescence measurements are used to set up the proper experimental conditions and also to detect Brucella bacteria on the surface. Best results are obtained with a 10 ng/μl incubation solution of antibody immobilized, in an oriented way, on a mixed PEG SAM interface.
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Affiliation(s)
| | - Lia Vanzetti
- Fondazione Bruno Kessler (FBK), Micro Nano Facility (MNF), Via Sommarive 18, 38123 Trento, Italy
| | - Roberto Canteri
- Fondazione Bruno Kessler (FBK), Micro Nano Facility (MNF), Via Sommarive 18, 38123 Trento, Italy
| | - Nunzio Cennamo
- Department of Engineering, University of Campania "L. Vanvitelli", Via Roma 29, 81031 Aversa, Italy
| | - Francesco Arcadio
- Department of Engineering, University of Campania "L. Vanvitelli", Via Roma 29, 81031 Aversa, Italy
| | - Chiara Perri
- Moresense srl, Filarete Foundation, Viale Ortles 22/4, 20139 Milano, Italy
| | | | - Rosalba Pitruzzella
- Department of Engineering, University of Campania "L. Vanvitelli", Via Roma 29, 81031 Aversa, Italy
| | - Riccardo Rovida
- Department of Engineering, University of Campania "L. Vanvitelli", Via Roma 29, 81031 Aversa, Italy
| | - Alessandro Chiodi
- Moresense srl, Filarete Foundation, Viale Ortles 22/4, 20139 Milano, Italy
| | - Luigi Zeni
- Department of Engineering, University of Campania "L. Vanvitelli", Via Roma 29, 81031 Aversa, Italy.
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Zare N, Karimi-Maleh H, Moghaddam MS. Design and fabrication of new anticancer sensor for monitoring of daunorubicin using 1-methyl-3-octylimidazolinium chloride and tin oxide/nitrogen-doped graphene quantum dot nanocomposite electrochemical sensor. ENVIRONMENTAL RESEARCH 2022; 215:114114. [PMID: 36030915 DOI: 10.1016/j.envres.2022.114114] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 08/08/2022] [Accepted: 08/12/2022] [Indexed: 06/15/2023]
Abstract
In this study, a novel tin oxide/nitrogen-doped graphene quantum dot nanocomposite (SnO2-NDGQD) and 1-methyl-3-octylimidazolinium chloride (1M3OICl) ionic liquid amplified carbon paste electrode (CPE) was fabricated as an efficient and fast-response sensor to determine daunorubicin, an anticancer drug. The electrochemical characteristics of daunorubicin at the surface of the 1M3OICl/SnO2-NDGQD/CPE was explored via various voltammetric methods. The high-resolution transmission electron microscope (HR-TEM) images were recorded to examine the morphological structure of the as-synthesized nanocomposites. The 1M3OICl/SnO2-NDGQD/CPE offered a wide linear concentration of 0.001-280.0 μM with a low detection limit of 0.40 nM at the optimized experimental conditions using square wave voltammetric (SWV) method. In a nutshell, the developed electrode illustrated outstanding selectivity in the presence of interfering agents and long-term stability. The1M3OICl/SnO2-NDGQD/CPE was used as new and powerful analytical tool for determination of daunorubicin in real samples with recovery range 98.75%-104.8%.
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Affiliation(s)
- Najmeh Zare
- Department of Chemical Engineering and Energy, Quchan University of Technology, Quchan, Iran
| | - Hassan Karimi-Maleh
- Department of Chemical Engineering and Energy, Quchan University of Technology, Quchan, Iran; Department of Sustainable Engineering, Saveetha School of Engineering, SIMATS, Chennai, 602105, India.
| | - Mojtaba Saei Moghaddam
- Department of Chemical Engineering and Energy, Quchan University of Technology, Quchan, Iran
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