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Zhang C, Parichenko A, Choi W, Shin S, Panes-Ruiz LA, Belyaev D, Custódio TF, Löw C, Lee JS, Ibarlucea B, Cuniberti G. Sybodies as Novel Bioreceptors toward Field-Effect Transistor-Based Detection of SARS-CoV-2 Antigens. ACS Appl Mater Interfaces 2023; 15:40191-40200. [PMID: 37603713 DOI: 10.1021/acsami.3c06073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/23/2023]
Abstract
The SARS-CoV-2 pandemic has increased the demand for low-cost, portable, and rapid biosensors, driving huge research efforts toward new nanomaterial-based approaches with high sensitivity. Many of them employ antibodies as bioreceptors, which have a costly development process that requires animal facilities. Recently, sybodies emerged as a new alternative class of synthetic binders and receptors with high antigen binding efficiency, improved chemical stability, and lower production costs via animal-free methods. Their smaller size is an important asset to consider in combination with ultrasensitive field-effect transistors (FETs) as transducers, which respond more intensely when biorecognition occurs near their surface. This work demonstrates the immobilization of sybodies against the spike protein of the virus on silicon surfaces, which are often integral parts of the semiconducting channel of FETs. Immobilized sybodies maintain the capability to capture antigens, even at low concentrations in the femtomolar range, as observed by fluorescence microscopy. Finally, the first proof of concept of sybody-modified FET sensing is provided using a nanoscopic silicon net as the sensitive area where the sybodies are immobilized. The future development of further sybodies against other biomarkers and their generalization in biosensors could be critical to decrease the cost of biodetection platforms in future pandemics.
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Affiliation(s)
- Chi Zhang
- Institute for Materials Science and Max Bergmann Center for Biomaterials, Dresden University of Technology, Dresden 01069, Germany
| | - Alexandra Parichenko
- Institute for Materials Science and Max Bergmann Center for Biomaterials, Dresden University of Technology, Dresden 01069, Germany
| | - Wonyeong Choi
- Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
| | - Seonghwan Shin
- Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
| | - Luis Antonio Panes-Ruiz
- Institute for Materials Science and Max Bergmann Center for Biomaterials, Dresden University of Technology, Dresden 01069, Germany
| | - Dmitry Belyaev
- Fraunhofer-Institut für Keramische Technologien und Systeme IKTS, Dresden 01109, Germany
| | - Tânia Filipa Custódio
- Centre for Structural Systems Biology (CSSB), European Molecular Biology Laboratory (EMBL) Hamburg, Notkestraße 85, 22607 Hamburg, Germany, Notkestraße 85, Hamburg 22607, Germany
| | - Christian Löw
- Centre for Structural Systems Biology (CSSB), European Molecular Biology Laboratory (EMBL) Hamburg, Notkestraße 85, 22607 Hamburg, Germany, Notkestraße 85, Hamburg 22607, Germany
| | - Jeong-Soo Lee
- Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
| | - Bergoi Ibarlucea
- Institute for Materials Science and Max Bergmann Center for Biomaterials, Dresden University of Technology, Dresden 01069, Germany
| | - Gianaurelio Cuniberti
- Institute for Materials Science and Max Bergmann Center for Biomaterials, Dresden University of Technology, Dresden 01069, Germany
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Laleh S, Ibarlucea B, Stadtmüller M, Cuniberti G, Medina-Sánchez M. Portable microfluidic impedance biosensor for SARS-CoV-2 detection. Biosens Bioelectron 2023; 236:115362. [PMID: 37300901 DOI: 10.1016/j.bios.2023.115362] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 04/24/2023] [Accepted: 04/27/2023] [Indexed: 06/12/2023]
Abstract
Pandemics as the one we are currently facing, where fast-spreading viruses present a threat to humanity, call for simple and reliable methods to perform early diagnosis, enabling detection of very low pathogen loads even before symptoms start showing in the host. So far, standard polymerase chain reaction (PCR) is the most reliable method for doing so, but it is rather slow and needs specialized reagents and trained personnel to operate it. Additionally, it is expensive and not easily accessible. Therefore, developing miniaturized and portable sensors which perform early detection of pathogens with high reliability is necessary to not only prevent the spreading of the disease but also to monitor the effectiveness of the developed vaccines and the appearance of new pathogenic variants. Thus, in this work we develop a sensitive microfluidic impedance biosensor for the direct detection of SARS-CoV-2, towards a mobile point-of-care (POC) platform. The operational parameters are optimized with the aid of design-of-experiment (DoE), for an accurate detection of the viral antigens using electrochemical impedance spectroscopy (EIS). We perform the biodetection of buffer samples spiked with fM concentration levels and validate the biosensor in a clinical context of relevance by analyzing 15 real patient samples up to a Ct value (cycle threshold) of 27. Finally, we demonstrate the versatility of the developed platform using different settings, including a small portable potentiostat, using multiple channels for self-validation, as well as with single biosensors for a smartphone-based readout. This work contributes to the rapid and reliable diagnostics of COVID-19 and can be extended to other infectious diseases, allowing the monitoring of viral load in vaccinated and unvaccinated people to anticipate a potential relapse of the disease.
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Affiliation(s)
- Soroush Laleh
- Micro- and NanoBiomedical Engineering Group (MNBE), Institute for Emerging Electronic Technologies, Leibniz Institute for Solid State and Materials Research (Leibniz IFW Dresden), 01069, Dresden, Germany; Chair of Micro- and NanoSystems, Center for Molecular Bioengineering (B CUBE), Dresden University of Technology, 01062, Dresden, Germany
| | - Bergoi Ibarlucea
- Institute for Materials Science and Max Bergmann Center for Biomaterials, Dresden University of Technology, Dresden, Germany.
| | | | - Gianaurelio Cuniberti
- Institute for Materials Science and Max Bergmann Center for Biomaterials, Dresden University of Technology, Dresden, Germany; Dresden Center for Computational Materials Science (DCMS), Dresden University of Technology, Dresden, Germany
| | - Mariana Medina-Sánchez
- Micro- and NanoBiomedical Engineering Group (MNBE), Institute for Emerging Electronic Technologies, Leibniz Institute for Solid State and Materials Research (Leibniz IFW Dresden), 01069, Dresden, Germany; Chair of Micro- and NanoSystems, Center for Molecular Bioengineering (B CUBE), Dresden University of Technology, 01062, Dresden, Germany.
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Jang HJ, Sui X, Zhuang W, Huang X, Chen M, Cai X, Wang Y, Ryu B, Pu H, Ankenbruck N, Beavis K, Huang J, Chen J. Remote Floating-Gate Field-Effect Transistor with 2-Dimensional Reduced Graphene Oxide Sensing Layer for Reliable Detection of SARS-CoV-2 Spike Proteins. ACS Appl Mater Interfaces 2022; 14:24187-24196. [PMID: 35593886 DOI: 10.1021/acsami.2c04969] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Despite intensive research of nanomaterials-based field-effect transistors (FETs) as a rapid diagnostic tool, it remains to be seen for FET sensors to be used for clinical applications due to a lack of stability, reliability, reproducibility, and scalability for mass production. Herein, we propose a remote floating-gate (RFG) FET configuration to eliminate device-to-device variations of two-dimensional reduced graphene oxide (rGO) sensing surfaces and most of the instability at the solution interface. Also, critical mechanistic factors behind the electrochemical instability of rGO such as severe drift and hysteresis were identified through extensive studies on rGO-solution interfaces varied by rGO thickness, coverage, and reduction temperature. rGO surfaces in our RFGFET structure displayed a Nernstian response of 54 mV/pH (from pH 2 to 11) with a 90% yield (9 samples out of total 10), coefficient of variation (CV) < 3%, and a low drift rate of 2%, all of which were calculated from the absolute measurement values. As proof-of-concept, we demonstrated highly reliable, reproducible, and label-free detection of spike proteins of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in a saliva-relevant media with concentrations ranging from 500 fg/mL to 5 μg/mL, with an R2 value of 0.984 and CV < 3%, and a guaranteed limit of detection at a few pg/mL. Taken together, this new platform may have an immense effect on positioning FET bioelectronics in a clinical setting for detecting SARS-CoV-2.
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Affiliation(s)
- Hyun-June Jang
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
- Chemical Sciences and Engineering Division, Physical Sciences and Engineering Directorate, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Xiaoyu Sui
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
- Chemical Sciences and Engineering Division, Physical Sciences and Engineering Directorate, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Wen Zhuang
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Xiaodan Huang
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Min Chen
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Xiaolei Cai
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Yale Wang
- Department of Mechanical Engineering, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53211, United States
| | - Byunghoon Ryu
- Chemical Sciences and Engineering Division, Physical Sciences and Engineering Directorate, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Haihui Pu
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
- Chemical Sciences and Engineering Division, Physical Sciences and Engineering Directorate, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Nicholas Ankenbruck
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Kathleen Beavis
- Department of Pathology, University of Chicago, Chicago, Illinois 60637, United States
| | - Jun Huang
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Junhong Chen
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
- Chemical Sciences and Engineering Division, Physical Sciences and Engineering Directorate, Argonne National Laboratory, Lemont, Illinois 60439, United States
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