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Rodriguez-Rivera GJ, Post A, John M, Buchan S, Bernard D, Razavi M, Cosgriff-Hernandez E. Injectable hydrogel electrodes as conduction highways to restore native pacing. Nat Commun 2024; 15:64. [PMID: 38167848 PMCID: PMC10762156 DOI: 10.1038/s41467-023-44419-0] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 12/11/2023] [Indexed: 01/05/2024] Open
Abstract
There is an urgent clinical need for a treatment regimen that addresses the underlying pathophysiology of ventricular arrhythmias, the leading cause of sudden cardiac death. The current report describes the design of an injectable hydrogel electrode and successful deployment in a pig model with access far more refined than any current pacing modalities allow. In addition to successful cardiac capture and pacing, analysis of surface ECG tracings and three-dimensional electroanatomic mapping revealed a QRS morphology comparable to native sinus rhythm, strongly suggesting the hydrogel electrode captures the deep septal bundle branches and Purkinje fibers. In an ablation model, electroanatomic mapping data demonstrated that the activation wavefront from the hydrogel reaches the mid-myocardium and endocardium much earlier than current single-point pacing modalities. Such uniform activation of broad swaths of tissue enables an opportunity to minimize the delayed myocardial conduction of heterogeneous tissue that underpins re-entry. Collectively, these studies demonstrate the feasibility of a new pacing modality that most closely resembles native conduction with the potential to eliminate lethal re-entrant arrhythmias and provide painless defibrillation.
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Affiliation(s)
| | - Allison Post
- Electrophysiology Clinical Research and Innovations, Texas Heart Institute, Houston, TX, 77030, USA
| | - Mathews John
- Electrophysiology Clinical Research and Innovations, Texas Heart Institute, Houston, TX, 77030, USA
| | - Skylar Buchan
- Electrophysiology Clinical Research and Innovations, Texas Heart Institute, Houston, TX, 77030, USA
| | - Drew Bernard
- Electrophysiology Clinical Research and Innovations, Texas Heart Institute, Houston, TX, 77030, USA
| | - Mehdi Razavi
- Electrophysiology Clinical Research and Innovations, Texas Heart Institute, Houston, TX, 77030, USA.
- Division of Cardiology, Department of Medicine, Baylor College of Medicine, Houston, TX, 77030, USA.
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Cavecci-Mendonça B, Luciano KM, Vaccas T, de Oliveira LA, Clemente EF, Rossini BC, Vieira JCS, de Barros LC, Biondi I, de Magalhães Padilha P, dos Santos LD. Preliminary Insights of Brazilian Snake Venom Metalloproteomics. Toxins (Basel) 2023; 15:648. [PMID: 37999511 PMCID: PMC10675094 DOI: 10.3390/toxins15110648] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 10/10/2023] [Accepted: 10/23/2023] [Indexed: 11/25/2023] Open
Abstract
Snakebite envenoming is one of the most significantly neglected tropical diseases in the world. The lack of diagnosis/prognosis methods for snakebite is one of our motivations to develop innovative technological solutions for Brazilian health. The objective of this work was to evaluate the protein and metallic ion composition of Crotalus durissus terrificus, Bothrops jararaca, B. alternatus, B. jararacussu, B. moojeni, B. pauloensis, and Lachesis muta muta snake venoms. Brazilian snake venoms were subjected to the shotgun proteomic approach using mass spectrometry, and metal ion analysis was performed by atomic spectrometry. Shotgun proteomics has shown three abundant toxin classes (PLA2, serine proteases, and metalloproteinases) in all snake venoms, and metallic ions analysis has evidenced that the Cu2+ ion is present exclusively in the L. m. muta venom; Ca2+ and Mg2+ ions have shown a statistical difference between the species of Bothrops and Crotalus genus, whereas the Zn2+ ion presented a statistical difference among all species studied in this work. In addition, Mg2+ ions have shown 42 times more in the C. d. terrificus venom when compared to the average concentration in the other genera. Though metal ions are a minor fraction of snake venoms, several venom toxins depend on them. We believe that these non-protein fractions are capable of assisting in the development of unprecedented diagnostic devices for Brazilian snakebites.
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Affiliation(s)
- Bruna Cavecci-Mendonça
- Biotechnology Institute (IBTEC), São Paulo State University (UNESP), Botucatu 18607-440, SP, Brazil; (B.C.-M.); (B.C.R.)
- Graduate Program in Tropical Diseases, Botucatu Medical School (FMB), São Paulo State University (UNESP), Botucatu 18618-687, SP, Brazil; (T.V.); (L.A.d.O.)
- Triad for Life Ltda, Prospecta–Botucatu Technological Incubator, Botucatu 18610-034, SP, Brazil
| | - Karen Monique Luciano
- Center of Studies of Venoms and Animals Venomous (CEVAP), São Paulo State University (UNESP), Botucatu 18619-002, SP, Brazil; (K.M.L.); (L.C.d.B.)
| | - Tauane Vaccas
- Graduate Program in Tropical Diseases, Botucatu Medical School (FMB), São Paulo State University (UNESP), Botucatu 18618-687, SP, Brazil; (T.V.); (L.A.d.O.)
| | - Laudicéia Alves de Oliveira
- Graduate Program in Tropical Diseases, Botucatu Medical School (FMB), São Paulo State University (UNESP), Botucatu 18618-687, SP, Brazil; (T.V.); (L.A.d.O.)
| | - Eloisa Fornaro Clemente
- Graduate Program in Research and Development (Medical Biotechnology), Botucatu Medical School (FMB), São Paulo State University (UNESP), Botucatu 18618-687, SP, Brazil;
| | - Bruno Cesar Rossini
- Biotechnology Institute (IBTEC), São Paulo State University (UNESP), Botucatu 18607-440, SP, Brazil; (B.C.-M.); (B.C.R.)
- Department of Chemical and Biological Sciences, Institute of Biosciences (IBB), São Paulo State University (UNESP), Botucatu 18618-689, SP, Brazil; (J.C.S.V.); (P.d.M.P.)
| | - José Cavalcante Souza Vieira
- Department of Chemical and Biological Sciences, Institute of Biosciences (IBB), São Paulo State University (UNESP), Botucatu 18618-689, SP, Brazil; (J.C.S.V.); (P.d.M.P.)
| | - Luciana Curtolo de Barros
- Center of Studies of Venoms and Animals Venomous (CEVAP), São Paulo State University (UNESP), Botucatu 18619-002, SP, Brazil; (K.M.L.); (L.C.d.B.)
| | - Ilka Biondi
- Laboratory of Venomous Animals and Herpetology, State University of Feira de Santana (UEFS), Feira de Santana 44036-900, BA, Brazil;
| | - Pedro de Magalhães Padilha
- Department of Chemical and Biological Sciences, Institute of Biosciences (IBB), São Paulo State University (UNESP), Botucatu 18618-689, SP, Brazil; (J.C.S.V.); (P.d.M.P.)
| | - Lucilene Delazari dos Santos
- Biotechnology Institute (IBTEC), São Paulo State University (UNESP), Botucatu 18607-440, SP, Brazil; (B.C.-M.); (B.C.R.)
- Graduate Program in Tropical Diseases, Botucatu Medical School (FMB), São Paulo State University (UNESP), Botucatu 18618-687, SP, Brazil; (T.V.); (L.A.d.O.)
- Graduate Program in Research and Development (Medical Biotechnology), Botucatu Medical School (FMB), São Paulo State University (UNESP), Botucatu 18618-687, SP, Brazil;
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Barra M, Tomaiuolo G, Villella VR, Esposito S, Liboà A, D'Angelo P, Marasso SL, Cocuzza M, Bertana V, Camilli E, Preziosi V. Organic Electrochemical Transistor Immuno-Sensors for Spike Protein Early Detection. Biosensors (Basel) 2023; 13:739. [PMID: 37504137 PMCID: PMC10377135 DOI: 10.3390/bios13070739] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 07/03/2023] [Accepted: 07/05/2023] [Indexed: 07/29/2023]
Abstract
The global COVID-19 pandemic has had severe consequences from the social and economic perspectives, compelling the scientific community to focus on the development of effective diagnostics that can combine a fast response and accurate sensitivity/specificity performance. Presently available commercial antigen-detecting rapid diagnostic tests (Ag-RDTs) are very fast, but still face significant criticisms, mainly related to their inability to amplify the protein signal. This translates to a limited sensitive outcome and, hence, a reduced ability to hamper the spread of SARS-CoV-2 infection. To answer the urgent need for novel platforms for the early, specific and highly sensitive detection of the virus, this paper deals with the use of organic electrochemical transistors (OECTs) as very efficient ion-electron converters and amplifiers for the detection of spike proteins and their femtomolar concentration. The electrical response of the investigated OECTs was carefully analyzed, and the changes in the parameters associated with the transconductance (i.e., the slope of the transfer curves) in the gate voltage range between 0 and 0.3 V were found to be more clearly correlated with the spike protein concentration. Moreover, the functionalization of OECT-based biosensors with anti-spike and anti-nucleocapside proteins, the major proteins involved in the disease, demonstrated the specificity of these devices, whose potentialities should also be considered in light of the recent upsurge of the so-called "long COVID" syndrome.
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Affiliation(s)
- Mario Barra
- CNR-SPIN, c/o Department of Physics ''Ettore Pancini'', P.le Tecchio, 80, 80125 Napoli, Italy
| | - Giovanna Tomaiuolo
- Department of Chemical, Materials and Production Engineering-University Federico II, P.le Tecchio 80, 80125 Napoli, Italy
- CEINGE, Advanced Biotechnologies, 80145 Napoli, Italy
| | - Valeria Rachela Villella
- Department of Chemical, Materials and Production Engineering-University Federico II, P.le Tecchio 80, 80125 Napoli, Italy
- CEINGE, Advanced Biotechnologies, 80145 Napoli, Italy
| | - Speranza Esposito
- Department of Chemical, Materials and Production Engineering-University Federico II, P.le Tecchio 80, 80125 Napoli, Italy
- CEINGE, Advanced Biotechnologies, 80145 Napoli, Italy
| | - Aris Liboà
- IMEM-CNR, Parco Area delle Scienze 37/A, 43124 Parma, Italy
- Graduate School in Science and Technologies of Materials and Department of Physics, University of Parma, Parco Area delle Scienze, 7/A, 43121 Parma, Italy
| | | | - Simone Luigi Marasso
- IMEM-CNR, Parco Area delle Scienze 37/A, 43124 Parma, Italy
- ChiLab, Department of Applied Science and Technology, Politecnico di Torino, 10129 Torino, Italy
| | - Matteo Cocuzza
- IMEM-CNR, Parco Area delle Scienze 37/A, 43124 Parma, Italy
- ChiLab, Department of Applied Science and Technology, Politecnico di Torino, 10129 Torino, Italy
| | - Valentina Bertana
- ChiLab, Department of Applied Science and Technology, Politecnico di Torino, 10129 Torino, Italy
| | - Elena Camilli
- ChiLab, Department of Applied Science and Technology, Politecnico di Torino, 10129 Torino, Italy
| | - Valentina Preziosi
- Department of Chemical, Materials and Production Engineering-University Federico II, P.le Tecchio 80, 80125 Napoli, Italy
- CEINGE, Advanced Biotechnologies, 80145 Napoli, Italy
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4
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Ganchi FA, Hardcastle TC. Role of Point-of-Care Diagnostics in Lower- and Middle-Income Countries and Austere Environments. Diagnostics (Basel) 2023; 13:diagnostics13111941. [PMID: 37296793 DOI: 10.3390/diagnostics13111941] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 04/25/2023] [Revised: 05/25/2023] [Accepted: 05/30/2023] [Indexed: 06/12/2023] Open
Abstract
INTRODUCTION Austere environments include the wilderness and many lower- and middle-income countries, with many of these countries facing unrest and war. The access to advanced diagnostic equipment is often unaffordable, even if available, and the equipment is often liable to break down. METHODS A short review paper examining the options available to medical professionals to undertake clinical and point-of-care diagnostic testing in resource-constrained environments that also illustrates the development of mobile advanced diagnostic equipment. The aim is to provide an overview of the spectrum and functionality of these devices beyond clinical acumen. RESULTS Details and examples of products covering all aspects of diagnostic testing are provided. Where relevant, reliability and cost implications are discussed. CONCLUSIONS The review highlights the need for more cost-effective accessible and utilitarian products and devices that will bring cost-effective health care to many in lower- and middle-income or austere environments.
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Affiliation(s)
- Feroz Abubaker Ganchi
- Department of Surgical Sciences, Nelson R Mandela School of Clinical Medicine, University of KwaZulu-Natal, Durban 4001, South Africa
- Trauma and Burns Services, Inkosi Albert Luthuli Central Hospital, Mayville 4058, South Africa
| | - Timothy Craig Hardcastle
- Department of Surgical Sciences, Nelson R Mandela School of Clinical Medicine, University of KwaZulu-Natal, Durban 4001, South Africa
- Trauma and Burns Services, Inkosi Albert Luthuli Central Hospital, Mayville 4058, South Africa
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Dobroiu S, van Delft FCMJM, Sudalaiyadum Perumal A, Dash S, Aveyard J, van Zijl J, Snijder J, van den Heuvel E, van Berkum J, Blanchard MP, Favard C, Nicolau DV. Spatially Addressable Multiplex Biodetection by Calibrated Micro/Nanostructured Surfaces. ACS Sens 2023; 8:1882-1890. [PMID: 37099014 DOI: 10.1021/acssensors.2c01939] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
A challenge of any biosensing technology is the detection of very low concentrations of analytes. The fluorescence interference contrast (FLIC) technique improves the fluorescence-based sensitivity by selectively amplifying, or suppressing, the emission of a fluorophore-labeled biomolecule immobilized on a transparent layer placed on top of a mirror basal surface. The standing wave of the reflected emission light means that the height of the transparent layer operates as a surface-embedded optical filter for the fluorescence signal. FLIC extreme sensitivity to wavelength is also its main problem: small, e.g., 10 nm range, variations of the vertical position of the fluorophore can translate in unwanted suppression of the detection signal. Herein, we introduce the concept of quasi-circular lenticular microstructured domes operating as continuous-mode optical filters, generating fluorescent concentric rings, with diameters determined by the wavelengths of the fluorescence light, in turn modulated by FLIC. The critical component of the lenticular structures was the shallow sloping side wall, which allowed the simultaneous separation of fluorescent patterns for virtually any fluorophore wavelength. Purposefully designed microstructures with either stepwise or continuous-slope dome geometries were fabricated to modulate the intensity and the lateral position of a fluorescence signal. The simulation of FLIC effects induced by the lenticular microstructures was confirmed by the measurement of the fluorescence profile for three fluorescent dyes, as well as high-resolution fluorescence scanning using stimulated emission depletion (STED) microscopy. The high sensitivity of the spatially addressable FLIC technology was further validated on a diagnostically important target, i.e., the receptor-binding domain (RBD) of the SARS-Cov2 via the detection of RBD:anti-S1-antibody.
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Affiliation(s)
- Serban Dobroiu
- Department of Electrical Engineering & Electronics, University of Liverpool, Liverpool L69 3GJ, U.K
- Department of Bioengineering, McGill University, Montreal H3A 0C3, Canada
| | - Falco C M J M van Delft
- MiPlaza, Philips Research Europe, 5656 AE Eindhoven, The Netherlands
- Molecular Sense Ltd., Liverpool L36 8HT, U.K
| | | | - Shantoshini Dash
- Department of Bioengineering, McGill University, Montreal H3A 0C3, Canada
| | - Jenny Aveyard
- Department of Electrical Engineering & Electronics, University of Liverpool, Liverpool L69 3GJ, U.K
| | - Jeroen van Zijl
- MiPlaza, Philips Research Europe, 5656 AE Eindhoven, The Netherlands
| | - Jaap Snijder
- MiPlaza, Philips Research Europe, 5656 AE Eindhoven, The Netherlands
| | | | - Jurgen van Berkum
- MiPlaza, Philips Research Europe, 5656 AE Eindhoven, The Netherlands
| | - Marie Pierre Blanchard
- Montpellier Ressources Imagerie, BioCampus, University of Montpellier, CNRS, INSERM, 34000 Montpellier Cedex, France
| | - Cyril Favard
- Membrane Domains and Viral Assembly, Montpellier Infectious Disease Research Institute, CNRS UMR9004, 1919, route de Mende, 34293 Cedex Montpellier, France
| | - Dan V Nicolau
- Department of Electrical Engineering & Electronics, University of Liverpool, Liverpool L69 3GJ, U.K
- Department of Bioengineering, McGill University, Montreal H3A 0C3, Canada
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Preziosi V, Barra M, Villella VR, Esposito S, D'Angelo P, Marasso SL, Cocuzza M, Cassinese A, Guido S. Immuno-Sensing at Ultra-Low Concentration of TG2 Protein by Organic Electrochemical Transistors. Biosensors (Basel) 2023; 13:bios13040448. [PMID: 37185523 PMCID: PMC10136445 DOI: 10.3390/bios13040448] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 03/24/2023] [Accepted: 03/29/2023] [Indexed: 05/17/2023]
Abstract
Transglutaminase 2 (TG2) is a ubiquitously expressed member of the transglutaminase family with Ca2+-dependent protein crosslinking activity. Its subcellular localization is crucial in determining its function, and indeed, TG2 is found in the extracellular matrix, mitochondria, recycling endosomes, plasma membrane, cytosol, and nucleus because it is associated with cell growth, differentiation, and apoptosis. It is involved in several pathologies, such as celiac disease, cardiovascular, hepatic, renal, and fibrosis diseases, carrying out opposite functions of up and down regulation in the progression of the same pathology. Therefore, this fine regulation requires a very sensitive and specific method of identification of TG2, which is to be detected in very small quantities in a deregulated condition. Here, we demonstrate the possibility of detecting TG2 down to attomolar concentration by using organic electrochemical transistors driven by gold electrodes functionalized with anti-TG2 antibodies. In particular, a direct correlation between the TG2 concentration and the transistor transconductance values, as extracted from typical transfer curves, was found. Overall, our findings highlight the potentialities of this new biosensing approach for the detection of TG2 in the context of pathological diseases, offering a rapid and cost-effective alternative to traditional methods.
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Affiliation(s)
- Valentina Preziosi
- Department of Chemical, Materials and Production Engineering, University Federico II, P.le Tecchio 80, I-80125 Naples, Italy
| | - Mario Barra
- CNR-SPIN, c/o Department of Physics "Ettore Pancini", P.le Tecchio, 80, I-80125 Naples, Italy
| | - Valeria Rachela Villella
- Department of Chemical, Materials and Production Engineering, University Federico II, P.le Tecchio 80, I-80125 Naples, Italy
- CEINGE, Advanced Biotechnologies, Via Gaetano Salvatore 486, I-80145 Naples, Italy
| | - Speranza Esposito
- Department of Chemical, Materials and Production Engineering, University Federico II, P.le Tecchio 80, I-80125 Naples, Italy
- CEINGE, Advanced Biotechnologies, Via Gaetano Salvatore 486, I-80145 Naples, Italy
| | | | - Simone Luigi Marasso
- IMEM-CNR, Parco Area delle Scienze 37/A, I-43124 Parma, Italy
- ChiLab, Department of Applied Science and Technology, Politecnico di Torino, I-10129 Torino, Italy
| | - Matteo Cocuzza
- IMEM-CNR, Parco Area delle Scienze 37/A, I-43124 Parma, Italy
- ChiLab, Department of Applied Science and Technology, Politecnico di Torino, I-10129 Torino, Italy
| | - Antonio Cassinese
- CNR-SPIN, c/o Department of Physics "Ettore Pancini", P.le Tecchio, 80, I-80125 Naples, Italy
- Department of Physics "Ettore Pancini", University Federico II, P.le Tecchio 80, I-80125 Naples, Italy
| | - Stefano Guido
- Department of Chemical, Materials and Production Engineering, University Federico II, P.le Tecchio 80, I-80125 Naples, Italy
- CEINGE, Advanced Biotechnologies, Via Gaetano Salvatore 486, I-80145 Naples, Italy
- National Interuniversity Consortium for Materials Science and Technology (INSTM), I-50121 Firenze, Italy
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De Silva T, Fawzy M, Hasani A, Ghanbari H, Abnavi A, Askar A, Ling Y, Mohammadzadeh MR, Kabir F, Ahmadi R, Rosin M, Kavanagh KL, Adachi MM. Ultrasensitive rapid cytokine sensors based on asymmetric geometry two-dimensional MoS(2) diodes. Nat Commun 2022; 13:7593. [PMID: 36535944 DOI: 10.1038/s41467-022-35278-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 11/24/2022] [Indexed: 12/23/2022] Open
Abstract
The elevation of cytokine levels in body fluids has been associated with numerous health conditions. The detection of these cytokine biomarkers at low concentrations may help clinicians diagnose diseases at an early stage. Here, we report an asymmetric geometry MoS2 diode-based biosensor for rapid, label-free, highly sensitive, and specific detection of tumor necrosis factor-α (TNF-α), a proinflammatory cytokine. This sensor is functionalized with TNF-α binding aptamers to detect TNF-α at concentrations as low as 10 fM, well below the typical concentrations found in healthy blood. Interactions between aptamers and TNF-α at the sensor surface induce a change in surface energy that alters the current-voltage rectification behavior of the MoS2 diode, which can be read out using a two-electrode configuration. The key advantages of this diode sensor are the simple fabrication process and electrical readout, and therefore, the potential to be applied in a rapid and easy-to-use, point-of-care, diagnostic tool.
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Peacock WF, Soto‐Ruiz KM, House SL, Cannon CM, Headden G, Tiffany B, Motov S, Merchant‐Borna K, Chang AM, Pearson C, Patterson BW, Jones AE, Miller J, Varon J, Bastani A, Clark C, Rafique Z, Kea B, Eppensteiner J, Williams JM, Mahler SA, Driver BE, Hendry P, Quackenbush E, Robinson D, Schrock JW, D'Etienne JP, Hogan CJ, Osborne A, Riviello R, Young S. Utility of COVID-19 antigen testing in the emergency department. J Am Coll Emerg Physicians Open 2022; 3:e12605. [PMID: 35072154 PMCID: PMC8760952 DOI: 10.1002/emp2.12605] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 10/28/2021] [Accepted: 11/02/2021] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND The BinaxNOW coronavirus disease 2019 (COVID-19) Ag Card test (Abbott Diagnostics Scarborough, Inc.) is a lateral flow immunochromatographic point-of-care test for the qualitative detection of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) nucleocapsid protein antigen. It provides results from nasal swabs in 15 minutes. Our purpose was to determine its sensitivity and specificity for a COVID-19 diagnosis. METHODS Eligible patients had symptoms of COVID-19 or suspected exposure. After consent, 2 nasal swabs were collected; 1 was tested using the Abbott RealTime SARS-CoV-2 (ie, the gold standard polymerase chain reaction test) and the second run on the BinaxNOW point of care platform by emergency department staff. RESULTS From July 20 to October 28, 2020, 767 patients were enrolled, of which 735 had evaluable samples. Their mean (SD) age was 46.8 (16.6) years, and 422 (57.4%) were women. A total of 623 (84.8%) patients had COVID-19 symptoms, most commonly shortness of breath (n = 404; 55.0%), cough (n = 314; 42.7%), and fever (n = 253; 34.4%). Although 460 (62.6%) had symptoms ≤7 days, the mean (SD) time since symptom onset was 8.1 (14.0) days. Positive tests occurred in 173 (23.5%) and 141 (19.2%) with the gold standard versus BinaxNOW test, respectively. Those with symptoms >2 weeks had a positive test rate roughly half of those with earlier presentations. In patients with symptoms ≤7 days, the sensitivity, specificity, and negative and positive predictive values for the BinaxNOW test were 84.6%, 98.5%, 94.9%, and 95.2%, respectively. CONCLUSIONS The BinaxNOW point-of-care test has good sensitivity and excellent specificity for the detection of COVID-19. We recommend using the BinasNOW for patients with symptoms up to 2 weeks.
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Affiliation(s)
- W. Frank Peacock
- Department of Emergency MedicineBaylor College of MedicineHoustonTexasUSA
| | | | - Stacey L. House
- Department of Emergency MedicineWashington University School of MedicineSt. LouisMissouriUSA
| | - Chad M. Cannon
- Department of Emergency MedicineUniversity of Kansas Medical CenterKansas CityKansasUSA
| | - Gary Headden
- Department of Emergency MedicineMedical University of South CarolinaCharlestonSouth CarolinaUSA
| | | | - Sergey Motov
- Department of Emergency MedicineMaimonides Medical CenterBrooklynNew YorkUSA
| | - Kian Merchant‐Borna
- Department of Emergency MedicineUniversity of Rochester Medical CenterUniversity of Rochester School of Medicine and DentistryRochesterNew YorkUSA
| | - Anna Marie Chang
- Department of Emergency MedicineThomas Jefferson UniversityPhiladelphiaPennsylvaniaUSA
| | - Claire Pearson
- Department of Emergency Medicine, Wayne State UniversityAscension St. JohnDetroitMichiganUSA
| | - Brian W. Patterson
- Department of Emergency MedicineUniversity of Wisconsin School of Medicine and Public HealthMadisonWisconsinUSA
| | - Alan E. Jones
- Department of Emergency MedicineUniversity of Mississippi Medical CenterJacksonMississippiUSA
| | - Joseph Miller
- Department of Emergency MedicineHenry Ford HospitalDetroitMichiganUSA
| | - Joseph Varon
- Department of Intensive Care MedicineUnited Memorial Medical CenterThe University of Houston School of MedicineHoustonTexasUSA
| | - Aveh Bastani
- Department of Emergency MedicineWilliam Beaumont Health SystemTroyMichiganUSA
| | - Carol Clark
- Department of Emergency MedicineWilliam Beaumont Health SystemRoyal OakMichiganUSA
| | - Zubaid Rafique
- Department of Emergency MedicineBaylor College of MedicineHoustonTexasUSA
| | - Bory Kea
- Department of Emergency MedicineOregon Health & Sciences UniversityPortlandOregonUSA
| | - John Eppensteiner
- Department of Emergency MedicineDuke UniversityDurhamNorth CarolinaUSA
| | - James M. Williams
- Department of Emergency MedicineSchool of MedicineMeritus Medical Center, Texas Tech University Health Science CenterLubbockTexasUSA
| | - Simon A. Mahler
- Department of Emergency MedicineWake Forest School of MedicineWinston‐SalemNorth CarolinaUSA
| | - Brian E. Driver
- Department of Emergency MedicineHennepin County Medical CenterMinneapolisMinnesotaUSA
| | - Phyllis Hendry
- Department of Emergency MedicineUniversity of Florida College of MedicineJacksonvilleFloridaUSA
| | - Eugenia Quackenbush
- Department of Emergency MedicineUniversity of North Carolina School of MedicineChapel HillNorth CarolinaUSA
| | - David Robinson
- Department of Emergency Medicine at McGovern Medical SchoolThe University of TexasHoustonTexasUSA
| | - Jon W. Schrock
- Department of Emergency MedicineMetroHealth Medical CenterCase Western Reserve University School of MedicineClevelandOhioUSA
| | - James P. D'Etienne
- John Peter Smith Health Network/Integrative Emergency ServicesFort WorthTexasUSA
| | - Christopher J. Hogan
- Virginia Commonwealth University Medical CenterDepartments of Emergency Medicine and SurgeryRichmondVirginiaUSA
| | - Anwar Osborne
- Department of Emergency MedicineEmory University School of MedicineAtlantaGeorgia
| | - Ralph Riviello
- Department of Emergency MedicineUniversity of Texas Health San AntonioSan AntonioTexasUSA
| | - Stephen Young
- TriCore Reference LaboratoriesAlbuquerqueNew MexicoUSA
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Konoplev G, Agafonova D, Bakhchova L, Mukhin N, Kurachkina M, Schmidt MP, Verlov N, Sidorov A, Oseev A, Stepanova O, Kozyrev A, Dmitriev A, Hirsch S. Label-Free Physical Techniques and Methodologies for Proteins Detection in Microfluidic Biosensor Structures. Biomedicines 2022; 10:207. [PMID: 35203416 PMCID: PMC8868674 DOI: 10.3390/biomedicines10020207] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 01/01/2022] [Accepted: 01/11/2022] [Indexed: 12/25/2022] Open
Abstract
Proteins in biological fluids (blood, urine, cerebrospinal fluid) are important biomarkers of various pathological conditions. Protein biomarkers detection and quantification have been proven to be an indispensable diagnostic tool in clinical practice. There is a growing tendency towards using portable diagnostic biosensor devices for point-of-care (POC) analysis based on microfluidic technology as an alternative to conventional laboratory protein assays. In contrast to universally accepted analytical methods involving protein labeling, label-free approaches often allow the development of biosensors with minimal requirements for sample preparation by omitting expensive labelling reagents. The aim of the present work is to review the variety of physical label-free techniques of protein detection and characterization which are suitable for application in micro-fluidic structures and analyze the technological and material aspects of label-free biosensors that implement these methods. The most widely used optical and impedance spectroscopy techniques: absorption, fluorescence, surface plasmon resonance, Raman scattering, and interferometry, as well as new trends in photonics are reviewed. The challenges of materials selection, surfaces tailoring in microfluidic structures, and enhancement of the sensitivity and miniaturization of biosensor systems are discussed. The review provides an overview for current advances and future trends in microfluidics integrated technologies for label-free protein biomarkers detection and discusses existing challenges and a way towards novel solutions.
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Affiliation(s)
- Georgii Konoplev
- Faculty of Electronics, Saint Petersburg Electrotechnical University “LETI”, 197376 Saint Petersburg, Russia; (D.A.); (A.S.); (O.S.); (A.K.)
| | - Darina Agafonova
- Faculty of Electronics, Saint Petersburg Electrotechnical University “LETI”, 197376 Saint Petersburg, Russia; (D.A.); (A.S.); (O.S.); (A.K.)
| | - Liubov Bakhchova
- Institute for Automation Technology, Otto-von-Guericke-University Magdeburg, 39106 Magdeburg, Germany;
| | - Nikolay Mukhin
- Faculty of Electronics, Saint Petersburg Electrotechnical University “LETI”, 197376 Saint Petersburg, Russia; (D.A.); (A.S.); (O.S.); (A.K.)
- Department of Engineering, University of Applied Sciences Brandenburg, 14770 Brandenburg an der Havel, Germany; (M.K.); (S.H.)
| | - Marharyta Kurachkina
- Department of Engineering, University of Applied Sciences Brandenburg, 14770 Brandenburg an der Havel, Germany; (M.K.); (S.H.)
| | - Marc-Peter Schmidt
- Faculty of Electrical Engineering, University of Applied Sciences Dresden, 01069 Dresden, Germany;
| | - Nikolay Verlov
- Molecular and Radiation Biophysics Division, Petersburg Nuclear Physics Institute Named by B.P. Konstantinov, National Research Centre Kurchatov Institute, 188300 Gatchina, Russia;
| | - Alexander Sidorov
- Faculty of Electronics, Saint Petersburg Electrotechnical University “LETI”, 197376 Saint Petersburg, Russia; (D.A.); (A.S.); (O.S.); (A.K.)
- Fuculty of Photonics, ITMO University, 197101 Saint Petersburg, Russia
| | - Aleksandr Oseev
- FEMTO-ST Institute, CNRS UMR-6174, University Bourgogne Franche-Comté, 25000 Besançon, France;
| | - Oksana Stepanova
- Faculty of Electronics, Saint Petersburg Electrotechnical University “LETI”, 197376 Saint Petersburg, Russia; (D.A.); (A.S.); (O.S.); (A.K.)
| | - Andrey Kozyrev
- Faculty of Electronics, Saint Petersburg Electrotechnical University “LETI”, 197376 Saint Petersburg, Russia; (D.A.); (A.S.); (O.S.); (A.K.)
| | - Alexander Dmitriev
- Department of Ecological Physiology, Federal State Budgetary Scientific Institution “Institute of Experimental Medicine” (FSBSI “IEM”), 197376 Saint Petersburg, Russia;
| | - Soeren Hirsch
- Department of Engineering, University of Applied Sciences Brandenburg, 14770 Brandenburg an der Havel, Germany; (M.K.); (S.H.)
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Baptista V, Costa MS, Calçada C, Silva M, Gil JP, Veiga MI, Catarino SO. The Future in Sensing Technologies for Malaria Surveillance: A Review of Hemozoin-Based Diagnosis. ACS Sens 2021; 6:3898-3911. [PMID: 34735120 DOI: 10.1021/acssensors.1c01750] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Early and effective malaria diagnosis is vital to control the disease spread and to prevent the emergence of severe cases and death. Currently, malaria diagnosis relies on optical microscopy and immuno-rapid tests; however, these require a drop of blood, are time-consuming, or are not specific and sensitive enough for reliable detection of low-level parasitaemia. Thus, there is an urge for simpler, prompt, and accurate alternative diagnostic methods. Particularly, hemozoin has been increasingly recognized as an attractive biomarker for malaria detection. As the disease proliferates, parasites digest host hemoglobin, in the process releasing toxic haem that is detoxified into an insoluble crystal, the hemozoin, which accumulates along with infection progression. Given its magnetic, optical, and acoustic unique features, hemozoin has been explored for new label-free diagnostic methods. Thereby, herein, we review the hemozoin-based malaria detection methods and critically discuss their challenges and potential for the development of an ideal diagnostic device.
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Affiliation(s)
- Vitória Baptista
- Microelectromechanical Systems Research Unit (CMEMS-UMinho), School of Engineering, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
- ICVS/3B’s − PT Government Associate Laboratory, 4805-017 Braga/Guimarães, Portugal
| | - Mariana S. Costa
- Microelectromechanical Systems Research Unit (CMEMS-UMinho), School of Engineering, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal
| | - Carla Calçada
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
- ICVS/3B’s − PT Government Associate Laboratory, 4805-017 Braga/Guimarães, Portugal
- Center for Neuroscience and Cell Biology (CNC), University of Coimbra, 3004-504 Coimbra, Portugal
| | - Miguel Silva
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
- ICVS/3B’s − PT Government Associate Laboratory, 4805-017 Braga/Guimarães, Portugal
| | - José Pedro Gil
- Stockholm Malaria Center, Department of Microbiology and Tumour Cell Biology, Karolinska Institutet, 171 77 Stockholm, Sweden
| | - Maria Isabel Veiga
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
- ICVS/3B’s − PT Government Associate Laboratory, 4805-017 Braga/Guimarães, Portugal
| | - Susana O. Catarino
- Microelectromechanical Systems Research Unit (CMEMS-UMinho), School of Engineering, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal
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Mousavi A, Zare-Dorabei R, Mosavi SH. Sensitive detection of tamsulosin hydrochloride based on dual-emission ratiometric fluorescence probe consisting of amine-carbon quantum dots and rhodamine B. Sci Rep 2021; 11:20805. [PMID: 34675291 DOI: 10.1038/s41598-021-00363-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 10/11/2021] [Indexed: 12/28/2022] Open
Abstract
In this work, amine-carbon quantum dots (CQDs)/rhodamine B (RhB) ratiometric fluorescent (RF) sensor was employed for effective and selective determination of tamsulosin hydrochloride (TMS) based on a dual-emission fluorescence system. Although the function of amine-CQDs is to transfer the specific interaction between TMS and sensor into detectable fluorescence (FL) signals, RhB as a reference unit has been employed to omit internal and external effects. The FL signal was quenched by adding the TMS at 442 nm; nevertheless, it did not change at 569 nm. The material characterization and investigation of the sensing mechanism were done. The optimization of pH, the volumetric ratio of CQDs to RhB, and interaction time parameters were carried out by the one-variable-at-a-time (OVAT) method. The quantitative analysis of the concentration of TMS for this RF sensor in a linear range of 0.446-7.083 μg mL-1 (1.091-17.338 μM) was obtained (R2 = 0.9969, n = 3) under optimum conditions. The limit of detection and quantitation values were estimated to be 0.033 μg mL-1 (0.081 μM) and 0.109 μg mL-1 (0.267 μM), respectively. The repeatability of intra-day and inter-day were less than one percent. This inexpensive RF probe was well applied to determine TMS in biological fluids, and acceptable achievements were obtained.
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Gheorghiu AA, Muguet I, Chakiris J, Chan KM, Priest C, Macgregor M. Plasma Deposited Polyoxazoline Films Integration Into Spiral Microfluidics for the Targeted Capture of Size Selected Cells. Front Chem 2021; 9:690781. [PMID: 34095091 PMCID: PMC8172585 DOI: 10.3389/fchem.2021.690781] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Accepted: 05/10/2021] [Indexed: 11/23/2022] Open
Abstract
Biomolecules readily and irreversibly bind to plasma deposited Polyoxazoline thin films in physiological conditions. The unique reactivity of these thin films toward antibodies is driving the development of immunosensing platforms for applications in cancer diagnostics. However, in order for these coatings to be used as advanced immunosensors, they need to be incorporated into microfluidic devices that are sealed via plasma bonding. In this work, the thickness, chemistry and reactivity of the polyoxazoline films were assessed following plasma activation. Films deposited from methyl and isopropenyl oxazoline precursors were integrated into spiral microfluidic devices and biofunctionalized with prostate cancer specific antibodies. Using microbeads as model particles, the design of the spiral microfluidic was optimised to enable the size-based isolation of cancer cells. The device was tested with a mixed cell suspension of healthy and malignant prostate cells. The results showed that, following size-specific separation in the spiral, selective capture was achieved on the immunofunctionalised PPOx surface. This proof of concept study demonstrates that plasma deposited polyoxazoline can be used for immunosensing in plasma bonded microfluidic devices.
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Affiliation(s)
| | - Ines Muguet
- École Nationale Supérieure de Chimie, de Biologie et de Physique de Bordeaux, Bordeaux INP, Pessac, France
| | - James Chakiris
- Future Industries Institute, University of South Australia, Adelaide, SA, Australia
| | - Kit Man Chan
- Future Industries Institute, University of South Australia, Adelaide, SA, Australia
| | - Craig Priest
- Future Industries Institute, University of South Australia, Adelaide, SA, Australia
| | - Melanie Macgregor
- Future Industries Institute, University of South Australia, Adelaide, SA, Australia
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Manciu M, Cardenas M, Bennet KE, Maran A, Yaszemski MJ, Maldonado TA, Magiricu D, Manciu FS. Assessment of Renal Osteodystrophy via Computational Analysis of Label-free Raman Detection of Multiple Biomarkers. Diagnostics (Basel) 2020; 10:E79. [PMID: 32023980 DOI: 10.3390/diagnostics10020079] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 01/27/2020] [Accepted: 01/29/2020] [Indexed: 01/19/2023] Open
Abstract
Accurate clinical evaluation of renal osteodystrophy (ROD) is currently accomplished using invasive in vivo transiliac bone biopsy, followed by in vitro histomorphometry. In this study, we demonstrate that an alternative method for ROD assessment is through a fast, label-free Raman recording of multiple biomarkers combined with computational analysis for predicting the minimally required number of spectra for sample classification at defined accuracies. Four clinically relevant biomarkers: the mineral-to-matrix ratio, the carbonate-to-matrix ratio, phenylalanine, and calcium contents were experimentally determined and simultaneously considered as input to a linear discriminant analysis (LDA). Additionally, sample evaluation was performed with a linear support vector machine (LSVM) algorithm, with a 300 variable input. The computed probabilities based on a single spectrum were only marginally different (~80% from LDA and ~87% from LSVM), both providing an unacceptable classification power for a correct sample assignment. However, the Type I and Type II assignment errors confirm that a relatively small number of independent spectra (7 spectra for Type I and 5 spectra for Type II) is necessary for a p < 0.05 error probability. This low number of spectra supports the practicality of future in vivo Raman translation for a fast and accurate ROD detection in clinical settings.
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Cui H, Zhu Q, Xie Q, Liu Z, Gao Y, He Y, Tan X, Xu Y. Low intensity ultrasound targeted microbubble destruction assists MSCs delivery and improves neural function in brain ischaemic rats. J Drug Target 2019; 28:320-329. [PMID: 31429596 DOI: 10.1080/1061186x.2019.1656724] [Citation(s) in RCA: 15] [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] [Indexed: 01/27/2023]
Abstract
Background and purpose: The present study aimed to explore the feasibility and efficacy of the targeted non-invasive implantation of mesenchymal stromal cells (MSCs) by low-intensity ultrasound-targeted microbubble destruction (LI-UTMD) assisted blood-brain barrier (BBB) opening and its improvement on neurobehavioural outcomes in brain ischaemic rats.Methods: A transcranial irradiation of low-intensity ultrasound by diagnostic devices was performed, and lipid microbubbles (MBs) and MSCs were simultaneously infused. Then, the MSC transmigration from brain vessels to parenchyma was demonstrated, and MSCs were statistically analysed on days 1, 4, 7 and 14. Behavioural function was statistically analysed.Results: The extra-vascular leakage of lanthanum and EB was observed at the brain ischaemic area receiving ultrasound. MSCs were observed at the ultrasound irradiated brain hemisphere, and the number of MSCs in LI-UTMD assisted MSCs group was significantly higher than that in the MSCs group (p < .01). The attachment, traversing and trans-migration of MSCs across the BBB were recorded. Neuro-behavioural function was improved with this approach.Conclusions: The transcranial irradiation of low intensity ultrasound targeted MBs destruction on brain ischaemic rats might be a safe and efficient BBB opening approach to prompt the successful delivery of MSCs into the targeted area of brain ischaemia, and ameliorate neurological function.
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Affiliation(s)
- Hai Cui
- Xinqiao Hospital, Army Medical University, Chongqing, China
| | - Qiong Zhu
- Xinqiao Hospital, Army Medical University, Chongqing, China
| | - Qinli Xie
- Physical Examination Center, Chongqing Emergency Medical Center, Chongqing, China
| | - Zheng Liu
- Xinqiao Hospital, Army Medical University, Chongqing, China
| | - Yunhua Gao
- Xinqiao Hospital, Army Medical University, Chongqing, China
| | - Ying He
- Xinqiao Hospital, Army Medical University, Chongqing, China
| | - Xi Tan
- Xinqiao Hospital, Army Medical University, Chongqing, China
| | - Yali Xu
- Xinqiao Hospital, Army Medical University, Chongqing, China
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15
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Chou WC, Hu WP, Yang YS, Chan HWH, Chen WY. Neutralized chimeric DNA probe for the improvement of GC-rich RNA detection specificity on the nanowire field-effect transistor. Sci Rep 2019; 9:11056. [PMID: 31363139 PMCID: PMC6667443 DOI: 10.1038/s41598-019-47522-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 07/12/2019] [Indexed: 12/15/2022] Open
Abstract
Silicon nanowire (SiNW) field-effect transistors (FETs) is a powerful tool in genetic molecule analysis because of their high sensitivity, short detection time, and label-free detection. In nucleic acid detection, GC-rich nucleic acid sequences form self- and cross-dimers and stem-loop structures, which can easily obtain data containing signals from nonspecific DNA binding. The features of GC-rich nucleic acid sequences cause inaccuracies in nucleic acid detection and hinder the development of precision medicine. To improve the inaccurate detection results, we used phosphate-methylated (neutral) nucleotides to synthesize the neutralized chimeric DNA oligomer probe. The probe fragment originated from a primer for the detection of hepatitis C virus (HCV) genotype 3b, and single-mismatched and perfect-matched targets were designed for single nucleotide polymorphisms (SNP) detection on the SiNW FET device. Experimental results revealed that the HCV-3b chimeric neutralized DNA (nDNA) probe exhibited better performance for SNP discrimination in 10 mM bis-tris propane buffer at 25 °C than a regular DNA probe. The SNP discrimination of the nDNA probe could be further improved at 40 °C on the FET device. Consequently, the neutralized chimeric DNA probe could successfully distinguish SNP in the detection of GC-rich target sequences under optimal operating conditions on the SiNW FET device.
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Affiliation(s)
- Wei-Cheng Chou
- Department of Chemical and Materials Engineering, National Central University, Jhong-Li, 32001, Taiwan
| | - Wen-Pin Hu
- Department of Bioinformatics and Medical Engineering, Asia University, Taichung, 41354, Taiwan
| | - Yuh-Shyong Yang
- Institute of Biological Science and Technology, National Chiao Tung University, Hsinchu, 30010, Taiwan
| | - Hardy Wai-Hong Chan
- Helios Bioelectronics, Inc. 3F., No. 2, Sec. 2, Shengyi Rd., Zhubei City, Hsinchu County, 302, Taiwan
| | - Wen-Yih Chen
- Department of Chemical and Materials Engineering, National Central University, Jhong-Li, 32001, Taiwan.
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Abstract
INTRODUCTION Biomarkers are objective indications of a medical state that can be measured accurately and reproducibly. Traditional biomarkers enable diagnosis of disease through detection of disease-specific molecules, disease-mediated molecular changes, or distinct physiological or anatomical signatures. Areas covered: This work provides a framework for selecting biomarkers that are most likely to provide useful information about a patient's disease state. Though the authors emphasize markers related to disease, this work is also applicable to biomarkers for monitoring physiological changes such as ovulation or pregnancy. Additionally, the scope was restricted to biomarkers that are amenable to analytical detection across a range of health care levels, including low resource settings. The authors describe trade-offs between biomarkers' sensitivity/specificity for a disease-causing agent, the complexity of detection, and how this knowledge can be applied to the development of diagnostic tests. This report also details additional assessment criteria for successful tests. Expert commentary: Biomarker selection should primarily be driven by an attempt to answer an explicit clinical question (preferably causative relationship of the biomarker to disease-state), and only then by test development expediency (ease of detection). This framework is useful for stakeholders from test developers to clinicians to identify the trade-offs for diagnostic biomarkers for any use case.
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Affiliation(s)
- Samantha A Byrnes
- a Department of Bioengineering , University of Washington , Seattle , WA , USA.,b Intellectual Ventures Laboratory , Bellevue , WA , USA
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Abstract
BACKGROUND While the excisional biopsy and histological examination of suspicious lesions remains the current gold standard for diagnosing cutaneous melanoma (CM), there is a demand for more objective and non-invasive examination methods that may support clinicians in their decision when to biopsy or not. METHODS This review is based on publications and guidelines retrieved by a selective search in PubMed and MEDLINE and focused on non-invasive diagnostic strategies for detecting melanoma. RESULTS Ten different non-invasive techniques were compared with regard to applicability, status of development, and resources necessary for introduction into clinical routine (dermoscopy, sequential digital dermoscopy, total body photography, computer-aided multispectral digital analysis, electrical impedance spectroscopy, Raman spectroscopy, reflectance confocal microscopy, multiphoton tomography, stepwise two-photon-laser spectroscopy, quantitative dynamic infrared imaging). In an effort to create a classification based on our analyses, we suggest to differentiate i) tools for screening of patients in daily clinical routine, ii) tools for examination of a restricted number of preselected lesions that produce an automated diagnostic score, iii) tools for examination of a restricted number of preselected lesions at specialized centers requiring extensive training, iv) devices at an experimental stage of development. CONCLUSION None of the discussed examination techniques is able to provide a definite and final diagnosis or to completely replace the histopathological examination. Up to date, the need for fully automated devices offering a complete skin cancer screening has not been satisfied.
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Affiliation(s)
- C Fink
- Department of Dermatology, University of Heidelberg, Heidelberg, Germany
| | - H A Haenssle
- Department of Dermatology, University of Heidelberg, Heidelberg, Germany
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