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Steinmaßl M, Boudaden J, Edgü G, Freund LJ, Meyer S, Mordehay N, Soto M, Endres HE, Muth J, Prüfer D, Lerch W, Kutter C. Passivated Impedimetric Sensors for Immobilization-Free Pathogen Detection by Isothermal Amplification and Melt Curve Analysis. BIOSENSORS 2022; 12:bios12050261. [PMID: 35624562 PMCID: PMC9138539 DOI: 10.3390/bios12050261] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 04/08/2022] [Accepted: 04/13/2022] [Indexed: 12/16/2022]
Abstract
The ongoing SARS-CoV-2 pandemic demonstrates that the capacity of centralized clinical diagnosis laboratories represents a significant limiting factor in the global fight against the newly emerged virus. Scaling up these capacities also requires simple and robust methods for virus diagnosis to be easily driven by untrained personnel in a point-of-care (POC) environment. The use of impedance sensors reduces the complexity and costs of diagnostic instruments and increases automation of diagnosis processes. We present an impedance point-of-care system (IMP-POCS) that uses interdigitated electrodes surrounded by an integrated heating meander to monitor loop-mediated isothermal amplification (LAMP) and melt curve analysis (MCA) consecutively in a short time. MCA permits distinguishing false- from true-positive results and significantly raises the validity of pathogen detection. Conclusively, the herein-developed miniaturized total analysis system (µTAS) represents a powerful and promising tool for providing reliable, low-cost alternatives to standard clinical diagnosis.
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Affiliation(s)
- Matthias Steinmaßl
- Fraunhofer Research Institution for Microsystems and Solid State Technology EMFT, 80686 Munich, Germany; (M.S.); (H.-E.E.); (W.L.); (C.K.)
- Physics Institute, Universität der Bundeswehr München, 85577 Neubiberg, Germany
| | - Jamila Boudaden
- Fraunhofer Research Institution for Microsystems and Solid State Technology EMFT, 80686 Munich, Germany; (M.S.); (H.-E.E.); (W.L.); (C.K.)
- Correspondence: (J.B.); (D.P.); Tel.: +49-89-54759-161 (J.B.)
| | - Güven Edgü
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, 52074 Aachen, Germany; (G.E.); (L.J.F.); (J.M.)
| | - Lena Julie Freund
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, 52074 Aachen, Germany; (G.E.); (L.J.F.); (J.M.)
| | - Simon Meyer
- Hochschule München, University of Applied Sciences, 80686 Munich, Germany; (S.M.); (N.M.)
| | - Noa Mordehay
- Hochschule München, University of Applied Sciences, 80686 Munich, Germany; (S.M.); (N.M.)
| | - Melissa Soto
- Center for Systems Biotechnology, Fraunhofer Chile Research Foundation, Santiago 7500588, Chile;
| | - Hanns-Erik Endres
- Fraunhofer Research Institution for Microsystems and Solid State Technology EMFT, 80686 Munich, Germany; (M.S.); (H.-E.E.); (W.L.); (C.K.)
| | - Jost Muth
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, 52074 Aachen, Germany; (G.E.); (L.J.F.); (J.M.)
| | - Dirk Prüfer
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, 52074 Aachen, Germany; (G.E.); (L.J.F.); (J.M.)
- Correspondence: (J.B.); (D.P.); Tel.: +49-89-54759-161 (J.B.)
| | - Wilfried Lerch
- Fraunhofer Research Institution for Microsystems and Solid State Technology EMFT, 80686 Munich, Germany; (M.S.); (H.-E.E.); (W.L.); (C.K.)
| | - Christoph Kutter
- Fraunhofer Research Institution for Microsystems and Solid State Technology EMFT, 80686 Munich, Germany; (M.S.); (H.-E.E.); (W.L.); (C.K.)
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