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Pourang S, Disharoon D, Hernandez S, Ahuja SP, Neal MD, Suster MA, Sen Gupta A, Mohseni P. A surface-functionalized whole blood-based dielectric microsensor for assessment of clot firmness in a fibrinolytic environment. Biosens Bioelectron 2024; 267:116789. [PMID: 39332249 DOI: 10.1016/j.bios.2024.116789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2024] [Revised: 09/09/2024] [Accepted: 09/16/2024] [Indexed: 09/29/2024]
Abstract
Accurate assessment of fibrin clot stability can predict bleeding risk in coagulopathic conditions such as thrombocytopenia and hypofibrinogenemia. Hyperfibrinolysis - a clinical phenotype characterized by an accelerated breakdown of the fibrin clot - makes such assessments challenging by obfuscating the effect of hemostatic components including platelets or fibrinogen on clot stability. In this work, we present a biofunctionalized, microfluidic, label-free, electronic biosensor to elicit unique, specific, and differential responses from the multifactorial processes of blood coagulation and fibrinolysis ex vivo. The microsensor tracks the temporal variation in the normalized real part of the dielectric permittivity of whole blood (<10 μL) at 1 MHz as the sample coagulates within a three-dimensional, parallel-plate, capacitive sensing area. Surface biofunctionalization of the microsensor's electrodes with physisorption of tissue factor (TF) and aprotinin permits real-time assessment of the coagulation and fibrinolytic outcomes. We show that surface coating with TF and manual addition of TF result in a similar degree of acceleration of coagulation kinetics in human whole blood samples. We also show that surface coating with aprotinin and manual addition of aprotinin yield similar results in inhibiting tissue plasminogen activator (tPA)-induced upregulated fibrinolysis in human whole blood samples. Validated through a clinically relevant, complementary assay - rotational thromboelastometry for clot viscoelasticity - we finally establish that a microsensor dual-coated with both TF and aprotinin detects the hemostatic rescue in the tPA-induced hyperfibrinolytic profile of whole blood and the hemostatic dysfunction due to concurrent platelet depletion in the blood sample, thus featuring enhanced ability in evaluating complex, combinatorial coagulopathies.
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Affiliation(s)
- Sina Pourang
- Department of Electrical, Computer, and Systems Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Dante Disharoon
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Selvin Hernandez
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Sanjay P Ahuja
- Division of Pediatric Hematology/Oncology, Rainbow Babies and Children's Hospital, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Matthew D Neal
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - Michael A Suster
- Department of Electrical, Computer, and Systems Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA.
| | - Anirban Sen Gupta
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA.
| | - Pedram Mohseni
- Department of Electrical, Computer, and Systems Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA; Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA.
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Nagasawa M. Pathophysiology of acute graft-versus-host disease from the perspective of hemodynamics determined by dielectric analysis. World J Transplant 2023; 13:379-390. [PMID: 38174146 PMCID: PMC10758686 DOI: 10.5500/wjt.v13.i6.379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 11/01/2023] [Accepted: 12/01/2023] [Indexed: 12/15/2023] Open
Abstract
BACKGROUND Numerous reports have demonstrated that the pathophysiology of graft-versus-host disease (GVHD) during hematopoietic stem cell transplantation (HSCT) is closely related to vascular endothelial disorders and coagulation abnormalities. We previously presented the discovery of a principle and the development of a novel instrument for measuring whole blood coagulation. This was achieved by assessing the variations in the dielectric properties of whole blood. AIM To investigate how GVHD affects the changes of dielectric properties of whole blood in patients with HSCT. METHODS We examined the changes of dielectric properties of whole blood and erythrocyte proteins by sodium dodecyl sulfate-polyacrylamide gel electrophoresis sequentially in patients with HSCT and compared it with clinical symptoms and inflammatory parameters of GVHD. RESULTS During severe GVHD, the dielectric relaxation strength markedly increased and expression of band3 decreased. The dielectric relaxation strength normalized with the improvement of GVHD. In vitro analysis confirmed that the increase of relaxation strength was associated with severe erythrocyte aggregates, but not with decreased expression of band3. CONCLUSION Severe erythrocyte aggregates observed in GVHD may cause coagulation abnor malities and circulatory failure, which, together with the irreversible erythrocyte dysfunction we recently reported, could lead to organ failure.
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Affiliation(s)
- Masayuki Nagasawa
- Department of Pediatrics, Musashino Red Cross Hospital, Musashino City 180-8610, Tokyo, Japan
- Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Tokyo 113-8519, Tokyo, Japan
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Suzuki A, Hamada S, Oono A, Hasegawa Y, Yamauchi Y, Okishige K, Hirao K, Sasano T. Edoxaban eliminates hypercoagulability evoked by transient temperature changes in human whole blood. J Arrhythm 2023; 39:901-908. [PMID: 38045446 PMCID: PMC10692835 DOI: 10.1002/joa3.12945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 09/21/2023] [Accepted: 10/09/2023] [Indexed: 12/05/2023] Open
Abstract
Background Thrombosis is a common critical complication relating to radiofrequency catheter ablation and cryoablation. There is a possibility that high-temperature stimulation during radiofrequency ablation or low-temperature stimulation during cryoablation may affect the coagulability of blood. In this study, we aimed to determine the impacts of transient temperature stimulations on the coagulability of whole blood and to clarify if edoxaban suppressed the hypercoagulability. Methods Citrated blood samples were drawn from 41 healthy subjects. Some blood samples were mixed with tissue factor (TF) and several concentrations of edoxaban (50, 100, and 200 ng/mL). Blood samples were exposed to several temperature stimulations for 1 min: heat stimulation (50°C) or cryostimulation (-20°C), and compared with control (37°C). Repeated cryostimulations or sequential cryo- and heat stimulation were also applied. Coagulability of whole blood was measured using a dielectric blood coagulometry. As an index of coagulability, the end of acceleration time (EAT) was used. Results Both heat- and cryostimulations significantly shortened the EAT compared to the control, indicating that hypercoagulability was induced by temperature stimulations. Application of TF enhanced and extended the hypercoagulability after the temperature stimulations. Sequential application of cryo- followed by heat stimulation further enhanced the hypercoagulability of blood. Application of edoxaban increased the EAT in a concentration-dependent manner in control condition. Edoxaban at 100 or 200 ng/mL completely suppressed the shortening of EAT evoked by these temperature stimulations. Conclusion Transient temperature stimulations evoked hypercoagulability regardless of cryo- or heat stimulation. Edoxaban with 100 ng/mL or more eliminated this temperature-stimulated hypercoagulability.
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Affiliation(s)
- Anna Suzuki
- Department of Cardiovascular MedicineTokyo Medical and Dental University (TMDU)TokyoJapan
| | - Satomi Hamada
- Department of Cardiovascular MedicineTokyo Medical and Dental University (TMDU)TokyoJapan
- Department of Clinical LaboratoryTokyo Medical and Dental University (TMDU) HospitalTokyoJapan
| | - Ai Oono
- Department of Cardiovascular MedicineTokyo Medical and Dental University (TMDU)TokyoJapan
| | - Yuki Hasegawa
- Department of Cardiovascular MedicineTokyo Medical and Dental University (TMDU)TokyoJapan
| | - Yasuteru Yamauchi
- Department of Cardiology, Japan Redcross Yokohama City Bay HospitalYokohamaJapan
| | | | | | - Tetsuo Sasano
- Department of Cardiovascular MedicineTokyo Medical and Dental University (TMDU)TokyoJapan
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Delianides CA, Pourang S, Hernandez S, Disharoon D, Ahuja SP, Neal MD, Gupta AS, Mohseni P, Suster MA. A Multichannel Portable Platform With Embedded Thermal Management for Miniaturized Dielectric Blood Coagulometry. IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS 2023; 17:843-856. [PMID: 37399149 DOI: 10.1109/tbcas.2023.3291875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/05/2023]
Abstract
This article presents a standalone, multichannel, miniaturized impedance analyzer (MIA) system for dielectric blood coagulometry measurements with a microfluidic sensor termed ClotChip. The system incorporates a front-end interface board for 4-channel impedance measurements at an excitation frequency of 1 MHz, an integrated resistive heater formed by a pair of printed-circuit board (PCB) traces to keep the blood sample near a physiologic temperature of 37 °C, a software-defined instrument module for signal generation and data acquisition, and a Raspberry Pi-based embedded computer with 7-inch touchscreen display for signal processing and user interface. When measuring fixed test impedances across all four channels, the MIA system exhibits an excellent agreement with a benchtop impedance analyzer, with rms errors of ≤0.30% over a capacitance range of 47-330 pF and ≤0.35% over a conductance range of 2.13-10 mS. Using in vitro-modified human whole blood samples, the two ClotChip output parameters, namely, the time to reach a permittivity peak (Tpeak) and maximum change in permittivity after the peak (Δϵr,max) are assessed by the MIA system and benchmarked against the corresponding parameters of a rotational thromboelastometry (ROTEM) assay. Tpeak exhibits a very strong positive correlation (r = 0.98, p < 10-6, n = 20) with the ROTEM clotting time (CT) parameter, while Δϵr,max exhibits a very strong positive correlation (r = 0.92, p < 10-6, n = 20) with the ROTEM maximum clot firmness (MCF) parameter. This work shows the potential of the MIA system as a standalone, multichannel, portable platform for comprehensive assessment of hemostasis at the point-of-care/point-of-injury (POC/POI).
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5
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Pourang S, Sekhon UDS, Disharoon D, Ahuja SP, Suster MA, Sen Gupta A, Mohseni P. Assessment of fibrinolytic status in whole blood using a dielectric coagulometry microsensor. Biosens Bioelectron 2022; 210:114299. [PMID: 35533507 PMCID: PMC10124761 DOI: 10.1016/j.bios.2022.114299] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 04/12/2022] [Accepted: 04/19/2022] [Indexed: 02/09/2023]
Abstract
Rapid assessment of the fibrinolytic status in whole blood at the point-of-care/point-of-injury (POC/POI) is clinically important to guide timely management of uncontrolled bleeding in patients suffering from hyperfibrinolysis after a traumatic injury. In this work, we present a three-dimensional, parallel-plate, capacitive sensor - termed ClotChip - that measures the temporal variation in the real part of blood dielectric permittivity at 1 MHz as the sample undergoes coagulation within a microfluidic channel with <10 μL of total volume. The ClotChip sensor features two distinct readout parameters, namely, lysis time (LT) and maximum lysis rate (MLR) that are shown to be sensitive to the fibrinolytic status in whole blood. Specifically, LT identifies the time that it takes from the onset of coagulation for the fibrin clot to mostly dissolve in the blood sample during fibrinolysis, whereas MLR captures the rate of fibrin clot lysis. Our findings are validated through correlative measurements with a rotational thromboelastometry (ROTEM) assay of clot viscoelasticity, qualitative/quantitative assessments of clot stability, and scanning electron microscope imaging of clot ultrastructural changes, all in a tissue plasminogen activator (tPA)-induced fibrinolytic environment. Moreover, we demonstrate the ClotChip sensor ability to detect the hemostatic rescue that occurs when the tPA-induced upregulated fibrinolysis is inhibited by addition of tranexamic acid (TXA) - a potent antifibrinolytic drug. This work demonstrates the potential of ClotChip as a diagnostic platform for rapid POC/POI assessment of fibrinolysis-related hemostatic abnormalities in whole blood to guide therapy.
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Affiliation(s)
- Sina Pourang
- Department of Electrical, Computer, and Systems Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Ujjal D S Sekhon
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Dante Disharoon
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Sanjay P Ahuja
- Division of Pediatric Hematology/Oncology, Rainbow Babies and Children's Hospital, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Michael A Suster
- Department of Electrical, Computer, and Systems Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Anirban Sen Gupta
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA.
| | - Pedram Mohseni
- Department of Electrical, Computer, and Systems Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA; Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA.
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6
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Sekar PK, Liang XM, Kahng SJ, Shu Z, Dichiara AB, Chung JH, Wu Y, Gao D. Simultaneous multiparameter whole blood hemostasis assessment using a carbon nanotube-paper composite capacitance sensor. Biosens Bioelectron 2022; 197:113786. [PMID: 34801797 DOI: 10.1016/j.bios.2021.113786] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 11/07/2021] [Accepted: 11/10/2021] [Indexed: 12/14/2022]
Abstract
Rapid and accurate clinical assessment of hemostasis is essential for managing patients who undergo invasive procedures, experience hemorrhages, or receive antithrombotic therapies. Hemostasis encompasses an ensemble of interactions between the cellular and non-cellular blood components, but current devices assess only partial aspects of this complex process. In this work, we describe the development of a new approach to simultaneously evaluate coagulation function, platelet count or function, and hematocrit using a carbon nanotube-paper composite (CPC) capacitance sensor. CPC capacitance response to blood clotting at 1.3 MHz provided three sensing parameters with distinctive sensitivities towards multiple clotting elements. Whole blood-based hemostasis assessments were conducted to demonstrate the potential utility of the developed sensor for various hemostatic conditions, including pathological conditions, such as hemophilia and thrombocytopenia. Results showed good agreements when compared to a conventional thromboelastography. Overall, the presented CPC capacitance sensor is a promising new biomedical device for convenient non-contact whole-blood based comprehensive hemostasis evaluation.
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Affiliation(s)
- Praveen K Sekar
- Department of Mechanical Engineering, University of Washington, Seattle, WA, 98195, USA
| | - Xin M Liang
- Wellman Center for Photomedicine, Division of Hematology and Oncology, Division of Endocrinology, Massachusetts General Hospital, VA Boston Healthcare System, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, 02115, USA.
| | - Seong-Joong Kahng
- Department of Mechanical Engineering, University of Washington, Seattle, WA, 98195, USA
| | - Zhiquan Shu
- Department of Mechanical Engineering, University of Washington, Seattle, WA, 98195, USA; School of Engineering and Technology, University of Washington Tacoma, Tacoma, WA, 98402, USA
| | - Anthony B Dichiara
- School of Environmental and Forest Sciences, University of Washington, Seattle, WA, 98195, USA
| | - Jae-Hyun Chung
- Department of Mechanical Engineering, University of Washington, Seattle, WA, 98195, USA
| | - Yanyun Wu
- Department of Mechanical Engineering, University of Washington, Seattle, WA, 98195, USA.
| | - Dayong Gao
- Department of Mechanical Engineering, University of Washington, Seattle, WA, 98195, USA; Department of Bioengineering, University of Washington, Seattle, WA, 98195, USA.
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Shokrekhodaei M, Quinones S. Review of Non-invasive Glucose Sensing Techniques: Optical, Electrical and Breath Acetone. SENSORS (BASEL, SWITZERLAND) 2020; 20:E1251. [PMID: 32106464 PMCID: PMC7085605 DOI: 10.3390/s20051251] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 02/22/2020] [Accepted: 02/23/2020] [Indexed: 12/12/2022]
Abstract
Annual deaths in the U.S. attributed to diabetes are expected to increase from 280,210 in 2015 to 385,840 in 2030. The increase in the number of people affected by diabetes has made it one of the major public health challenges around the world. Better management of diabetes has the potential to decrease yearly medical costs and deaths associated with the disease. Non-invasive methods are in high demand to take the place of the traditional finger prick method as they can facilitate continuous glucose monitoring. Research groups have been trying for decades to develop functional commercial non-invasive glucose measurement devices. The challenges associated with non-invasive glucose monitoring are the many factors that contribute to inaccurate readings. We identify and address the experimental and physiological challenges and provide recommendations to pave the way for a systematic pathway to a solution. We have reviewed and categorized non-invasive glucose measurement methods based on: (1) the intrinsic properties of glucose, (2) blood/tissue properties and (3) breath acetone analysis. This approach highlights potential critical commonalities among the challenges that act as barriers to future progress. The focus here is on the pertinent physiological aspects, remaining challenges, recent advancements and the sensors that have reached acceptable clinical accuracy.
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Affiliation(s)
- Maryamsadat Shokrekhodaei
- Department of Electrical and Computer Engineering, The University of Texas at El Paso, El Paso, TX 79968, USA
| | - Stella Quinones
- Department of Metallurgical, Materials and Biomedical Engineering, The University of Texas at El Paso, El Paso, TX 79968, USA;
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Zhbanov A, Yang S. Electrochemical Impedance Characterization of Blood Cell Suspensions. Part 1: Basic Theory and Application to Two-Phase Systems. IEEE Trans Biomed Eng 2020; 67:2965-2978. [PMID: 32078529 DOI: 10.1109/tbme.2020.2974480] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Electrochemical impedance spectra of composite materials contain information on the topological arrangement, volume fraction, and shape of particles, as well as the dielectric properties of the matrix and particles. The objective of this study is to investigate how these parameters affect the dielectric spectrum and what reliable information can be extracted from experimental data. The main attention was focused on systems with dielectric behavior similar to that of human blood. Mostly plasma and erythrocytes determine the dielectric properties of whole blood. Erythrocytes suspended in plasma can be considered as three-phase systems with single-shelled particles. A theoretical approach based on the effective medium theory is developed for calculating the effective permittivity and conductivity of three-phase composites at a wide frequency range (from 0 to 1 GHz). A finite-difference method is applied to model three-dimensional periodic structures. A special case of two-phase materials is used to demonstrate the influence of the shape and arrangement of particles on dielectric properties. Theoretical and numerical approaches are applied to two-phase composites with spherical, spheroidal and biconcave particles and are compared with each other and with published data. It is shown that two-phase composites exhibit only β-dispersion. In contrast to the quasi-static limit, the wide-bandwidth impedance spectroscopy makes it possible to distinguish between disordered and regular arrangements of spheroidal and biconcave particles. The results can be used to analyze the dielectric properties of blood, which is very promising for various medical applications. This study of two-phase composites can be further extended to three-phase composites.
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Caduff A, Ben Ishai P, Feldman Y. Continuous noninvasive glucose monitoring; water as a relevant marker of glucose uptake in vivo. Biophys Rev 2019; 11:1017-1035. [PMID: 31741172 DOI: 10.1007/s12551-019-00601-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 10/13/2019] [Indexed: 01/22/2023] Open
Abstract
With diabetes set to become the number 3 killer in the Western hemisphere and proportionally growing in other parts of the world, the subject of noninvasive monitoring of glucose dynamics in blood remains a "hot" topic, with the involvement of many groups worldwide. There is a plethora of techniques involved in this academic push, but the so-called multisensor system with an impedance-based core seems to feature increasingly strongly. However, the symmetrical structure of the glucose molecule and its shielding by the smaller dipoles of water would suggest that this option should be less enticing. Yet there is enough phenomenological evidence to suggest that impedance-based methods are truly sensitive to the biophysical effects of glucose variations in the blood. We have been trying to answer this very fundamental conundrum: "Why is impedance or dielectric spectroscopy sensitive to glucose concentration changes in the blood and why can this be done over a very broad frequency band, including microwaves?" The vistas for medical diagnostics are very enticing. There have been a significant number of papers published that look seriously at this problem. In this review, we want to summarize this body of research and the underlying mechanisms and propose a perspective toward utilizing the phenomena. It is our impression that the current world view on the dielectric response of glucose in solution, as outlined below, will support the further evolution and implementation toward practical noninvasive glucose monitoring solutions.
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Affiliation(s)
- Andreas Caduff
- Applied Physics Department and the Center for Electromagnetic Research and Characterization, The Hebrew University of Jerusalem, 91904, Jerusalem, Israel
| | - Paul Ben Ishai
- Department of Physics, Ariel University, 40700, Ariel, Israel
| | - Yuri Feldman
- Applied Physics Department and the Center for Electromagnetic Research and Characterization, The Hebrew University of Jerusalem, 91904, Jerusalem, Israel.
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10
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Differential Assessment of Factor Xa Activity and Global Blood Coagulability Utilizing Novel Dielectric Coagulometry. Sci Rep 2018; 8:16129. [PMID: 30382162 PMCID: PMC6208345 DOI: 10.1038/s41598-018-34229-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 10/12/2018] [Indexed: 11/29/2022] Open
Abstract
An easy-to-use assessment for activated factor X (FXa) is lacking despite its pivotal role in the coagulation. Dielectric blood coagulometry (DBCM) was recently invented as a novel assessment tool for determining the whole blood coagulability by measuring the temporal change in the permittivity of blood. We previously reported that it could evaluate the global blood coagulability. This study aimed to apply the DBCM for assessing FXa activity and its inhibition by anticoagulants. We performed the DBCM analysis along with measurement of the FXa activity by a fluorometric assay in samples from healthy subjects, and identified a new index named maximum acceleration time (MAT) that had a correlation to the FXa activity. Next the DBCM analysis was performed using blood samples mixed with anticoagulants (unfractionated heparin, dalteparin, and edoxaban). Blood samples with three anticoagulants had different profiles of the temporal change in the permittivity, reflecting their different selectivity for FXa. We compared the MAT with the anti-FXa activity assay, and found that the prolongation of MAT was similarly correlated with the anti-FXa activity regardless of the type of anticoagulants. In conclusion, the DBCM has the possibility for evaluating the innate FXa activity and effect of anticoagulants focusing on their FXa inhibition.
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Maji D, De La Fuente M, Kucukal E, Sekhon UDS, Schmaier AH, Sen Gupta A, Gurkan UA, Nieman MT, Stavrou EX, Mohseni P, Suster MA. Assessment of whole blood coagulation with a microfluidic dielectric sensor. J Thromb Haemost 2018; 16:2050-2056. [PMID: 30007048 PMCID: PMC6173630 DOI: 10.1111/jth.14244] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Indexed: 12/12/2022]
Abstract
Essentials ClotChip is a novel microsensor for comprehensive assessment of ex vivo hemostasis. Clinical samples show high sensitivity to detecting the entire hemostatic process. ClotChip readout exhibits distinct information on coagulation factor and platelet abnormalities. ClotChip has potential as a point-of-care platform for comprehensive hemostatic analysis. SUMMARY Background Rapid point-of-care (POC) assessment of hemostasis is clinically important in patients with a variety of coagulation factor and platelet defects who have bleeding disorders. Objective To evaluate a novel dielectric microsensor, termed ClotChip, which is based on the electrical technique of dielectric spectroscopy for rapid, comprehensive assessment of whole blood coagulation. Methods The ClotChip is a three-dimensional, parallel-plate, capacitive sensor integrated into a single-use microfluidic channel with miniscule sample volume (< 10 μL). The ClotChip readout is defined as the temporal variation in the real part of dielectric permittivity of whole blood at 1 MHz. Results The ClotChip readout exhibits two distinct parameters, namely, the time to reach a permittivity peak (Tpeak ) and the maximum change in permittivity after the peak (Δεr,max ), which are, respectively, sensitive towards detecting non-cellular (i.e. coagulation factor) and cellular (i.e. platelet) abnormalities in the hemostatic process. We evaluated the performance of ClotChip using clinical blood samples from 15 healthy volunteers and 12 patients suffering from coagulation defects. The ClotChip Tpeak parameter exhibited superior sensitivity at distinguishing coagulation disorders as compared with conventional screening coagulation tests. Moreover, the ClotChip Δεr,max parameter detected platelet function inhibition induced by aspirin and exhibited strong positive correlation with light transmission aggregometry. Conclusions This study demonstrates that ClotChip assesses multiple aspects of the hemostatic process in whole blood on a single disposable cartridge, highlighting its potential as a POC platform for rapid, comprehensive hemostatic analysis.
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Affiliation(s)
- D Maji
- Electrical Engineering and Computer Science Department, Case Western Reserve University, Cleveland, OH, USA
| | - M De La Fuente
- Department of Pharmacology, Case Western Reserve University, Cleveland, OH, USA
| | - E Kucukal
- Mechanical and Aerospace Engineering Department, Case Western Reserve University, Cleveland, OH, USA
| | - U D S Sekhon
- Biomedical Engineering Department, Case Western Reserve University, Cleveland, OH, USA
| | - A H Schmaier
- Department of Medicine, Hematology and Oncology Division, University Hospitals Cleveland Medical Center, Cleveland, OH, USA
- Department of Medicine, Hematology and Oncology Division, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - A Sen Gupta
- Biomedical Engineering Department, Case Western Reserve University, Cleveland, OH, USA
| | - U A Gurkan
- Mechanical and Aerospace Engineering Department, Case Western Reserve University, Cleveland, OH, USA
- Biomedical Engineering Department, Case Western Reserve University, Cleveland, OH, USA
| | - M T Nieman
- Department of Pharmacology, Case Western Reserve University, Cleveland, OH, USA
| | - E X Stavrou
- Department of Medicine, Louis Stokes Veterans Administration Medical Center, Cleveland, OH, USA
- Department of Medicine, Hematology and Oncology Division, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - P Mohseni
- Electrical Engineering and Computer Science Department, Case Western Reserve University, Cleveland, OH, USA
| | - M A Suster
- Electrical Engineering and Computer Science Department, Case Western Reserve University, Cleveland, OH, USA
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12
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Hayashi Y, Brun MA, Machida K, Lee S, Murata A, Omori S, Uchiyama H, Inoue Y, Kudo T, Toyofuku T, Nagasawa M, Uchimura I, Nakamura T, Muneta T. Simultaneous assessment of blood coagulation and hematocrit levels in dielectric blood coagulometry. Biorheology 2018; 54:25-35. [PMID: 28800301 PMCID: PMC5676769 DOI: 10.3233/bir-16118] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
BACKGROUND In a whole blood coagulation test, the concentration of any in vitro diagnostic agent in plasma is dependent on the hematocrit level but its impact on the test result is unknown. OBJECTIVE The aim of this work was to clarify the effects of reagent concentration, particularly Ca2+, and to find a method for hematocrit estimation compatible with the coagulation test. METHODS Whole blood coagulation tests by dielectric blood coagulometry (DBCM) and rotational thromboelastometry were performed with various concentrations of Ca2+ or on samples with different hematocrit levels. DBCM data from a previous clinical study of patients who underwent total knee arthroplasty were re-analyzed. RESULTS Clear Ca2+ concentration and hematocrit level dependences of the characteristic times of blood coagulation were observed. Rouleau formation made hematocrit estimation difficult in DBCM, but use of permittivity at around 3 MHz made it possible. The re-analyzed clinical data showed a good correlation between permittivity at 3 MHz and hematocrit level (R2=0.83). CONCLUSIONS Changes in the hematocrit level may affect whole blood coagulation tests. DBCM has the potential to overcome this effect with some automated correction using results from simultaneous evaluations of the hematocrit level and blood coagulability.
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Affiliation(s)
- Yoshihito Hayashi
- LE Development Department, R&D Division, Medical Business Unit, Imaging Products & Solutions Sector, Sony Corporation, Tokyo, Japan
| | - Marc-Aurèle Brun
- Life Science Department, Biomedical R&D Division, RDS Platform, Sony Corporation, Tokyo, Japan
| | - Kenzo Machida
- LE Development Department, R&D Division, Medical Business Unit, Imaging Products & Solutions Sector, Sony Corporation, Tokyo, Japan
| | - Seungmin Lee
- LE Development Department, R&D Division, Medical Business Unit, Imaging Products & Solutions Sector, Sony Corporation, Tokyo, Japan
| | - Aya Murata
- LE Development Department, R&D Division, Medical Business Unit, Imaging Products & Solutions Sector, Sony Corporation, Tokyo, Japan
| | - Shinji Omori
- LE Development Department, R&D Division, Medical Business Unit, Imaging Products & Solutions Sector, Sony Corporation, Tokyo, Japan
| | - Hidetoshi Uchiyama
- Department of Surgical Specialities, Tokyo Medical and Dental University Graduate School, Tokyo, Japan
| | - Yoshinori Inoue
- Department of Surgical Specialities, Tokyo Medical and Dental University Graduate School, Tokyo, Japan
| | - Toshifumi Kudo
- Department of Surgical Specialities, Tokyo Medical and Dental University Graduate School, Tokyo, Japan
| | - Takahiro Toyofuku
- Department of Surgical Specialities, Tokyo Medical and Dental University Graduate School, Tokyo, Japan
| | - Masayuki Nagasawa
- Department of Pediatrics, Tokyo Medical and Dental University, Tokyo, Japan.,Department of Pediatrics, Musashino Red Cross Hospital, Musashino-city, Tokyo, Japan
| | - Isao Uchimura
- Department of Endocrinology and Metabolism, Tokyo Medical and Dental University, Tokyo, Japan
| | - Tomomasa Nakamura
- Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, Tokyo, Japan
| | - Takeshi Muneta
- Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, Tokyo, Japan
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13
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Maji D, Suster MA, Kucukal E, Sekhon UDS, Gupta AS, Gurkan UA, Stavrou EX, Mohseni P. ClotChip: A Microfluidic Dielectric Sensor for Point-of-Care Assessment of Hemostasis. IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS 2017; 11:1459-1469. [PMID: 28920906 PMCID: PMC6091230 DOI: 10.1109/tbcas.2017.2739724] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
This paper describes the design, fabrication, and testing of a microfluidic sensor for dielectric spectroscopy of human whole blood during coagulation. The sensor, termed ClotChip, employs a three-dimensional, parallel-plate, capacitive sensing structure with a floating electrode integrated into a microfluidic channel. Interfaced with an impedance analyzer, the ClotChip measures the complex relative dielectric permittivity, ϵr , of human whole blood in the frequency range of 40 Hz to 100 MHz. The temporal variation in the real part of the blood dielectric permittivity at 1 MHz features a time to reach a permittivity peak, , as well as a maximum change in permittivity after the peak, , as two distinct parameters of ClotChip readout. The ClotChip performance was benchmarked against rotational thromboelastometry (ROTEM) to evaluate the clinical utility of its readout parameters in capturing the clotting dynamics arising from coagulation factors and platelet activity. exhibited a very strong positive correlation ( r = 0.99, p < 0.0001) with the ROTEM clotting time parameter, whereas exhibited a strong positive correlation (r = 0.85, p < 0.001) with the ROTEM maximum clot firmness parameter. This paper demonstrates the ClotChip potential as a point-of-care platform to assess the complete hemostatic process using <10 μL of human whole blood.
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14
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Igari K, Kudo T, Toyofuku T, Inoue Y. The use of dielectric blood coagulometry in the evaluation of coagulability in patients with peripheral arterial disease. BMC Clin Pathol 2017; 17:14. [PMID: 28852324 PMCID: PMC5569553 DOI: 10.1186/s12907-017-0054-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Accepted: 08/17/2017] [Indexed: 11/13/2022] Open
Abstract
Background Platelets and coagulation proteins contribute to the development of peripheral arterial disease, especially atherosclerotic disease. Several experimental studies have proven a significant correlation between hypercoagulability and atherosclerosis. We used dielectric blood coagulometry, which was initially designed to evaluate the coagulable status, to examine the coagulability of peripheral arterial disease patients, and investigated the factors that were significantly correlated with the results. Methods We performed dielectric blood coagulometry in 49 peripheral arterial disease patients. In addition, we recorded the patients’ demographic information, including the presence of comorbidities, hemodynamic status, and laboratory findings. To investigate coagulability, we calculated the Tmax value, which indicates the time from recalcification to maximum normalized permittivity. Results The Tmax values of diabetes mellitus patients were significantly lower than those of non-diabetic patients (1 MHz, P = 0.010; 10 MHz, 0.011). Furthermore, the Tmax value was statistically correlated with the activated partial thromboplastin time (1 MHz, ρ = 0.286, P = 0.048; 10 MHz, ρ = 0.301, P = 0.037). Conclusions Dielectric blood coagulometry detected the hypercoagulable status in diabetes mellitus patients, and reflected their level of coagulability, which was also evaluated by the activated partial thromboplastin time.
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Affiliation(s)
- Kimihiro Igari
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo, 113-8519 Japan
| | - Toshifumi Kudo
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo, 113-8519 Japan
| | - Takahiro Toyofuku
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo, 113-8519 Japan
| | - Yoshinori Inoue
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo, 113-8519 Japan
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15
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Gilev K, Yastrebova E, Strokotov D, Yurkin M, Karmadonova N, Chernyshev A, Lomivorotov V, Maltsev V. Advanced consumable-free morphological analysis of intact red blood cells by a compact scanning flow cytometer. Cytometry A 2017; 91:867-873. [DOI: 10.1002/cyto.a.23141] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 02/27/2017] [Accepted: 05/02/2017] [Indexed: 01/14/2023]
Affiliation(s)
- K.V. Gilev
- Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, Institutskaya 3; Novosibirsk 630090 Russia
- Novosibirsk State University, Pirogova 2; Novosibirsk 630090 Russia
| | - E.S. Yastrebova
- Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, Institutskaya 3; Novosibirsk 630090 Russia
- Novosibirsk State University, Pirogova 2; Novosibirsk 630090 Russia
| | - D.I. Strokotov
- Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, Institutskaya 3; Novosibirsk 630090 Russia
- Novosibirsk State Medical University, Krasny Prospect 52; Novosibirsk 630091 Russia
| | - M.A. Yurkin
- Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, Institutskaya 3; Novosibirsk 630090 Russia
- Novosibirsk State University, Pirogova 2; Novosibirsk 630090 Russia
| | - N.A. Karmadonova
- Siberian Biomedical Research Center, Rechkunovskaya 15; Novosibirsk 630055 Russia
| | - A.V. Chernyshev
- Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, Institutskaya 3; Novosibirsk 630090 Russia
- Novosibirsk State University, Pirogova 2; Novosibirsk 630090 Russia
| | - V.V. Lomivorotov
- Siberian Biomedical Research Center, Rechkunovskaya 15; Novosibirsk 630055 Russia
| | - V.P. Maltsev
- Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, Institutskaya 3; Novosibirsk 630090 Russia
- Novosibirsk State University, Pirogova 2; Novosibirsk 630090 Russia
- Novosibirsk State Medical University, Krasny Prospect 52; Novosibirsk 630091 Russia
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16
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Levy E, Barshtein G, Livshits L, Ishai PB, Feldman Y. Dielectric Response of Cytoplasmic Water and Its Connection to the Vitality of Human Red Blood Cells: I. Glucose Concentration Influence. J Phys Chem B 2016; 120:10214-10220. [PMID: 27618444 DOI: 10.1021/acs.jpcb.6b06996] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The vitality of red blood cells depends on the process control of glucose homeostasis, including the membrane's ability to "switch off" d-glucose uptake at the physiologically specific concentration of 10-12 mM. We present a comprehensive study of human erythrocytes suspended in buffer solutions with varying concentrations of d-glucose at room temperature, using microwave dielectric spectroscopy (0.5 GHz-50 GHz) and cell deformability characterization (the Elongation ratio). By use of mixture formulas the contribution of the cytoplasm to the dielectric spectra was isolated. It reveals a strong dependence on the concentration of buffer d-glucose. Tellingly, the concentration 10-12 mM is revealed as a critical point in the behavior. The dielectric response of cytoplasm depends on dipole-matrix interactions between water structures and moieties, like ATP, produced during glycolysis. Subsequently, it is a marker of cellular health. One would hope that this mechanism could provide a new vista on noninvasive glucose monitoring.
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Affiliation(s)
- Evgeniya Levy
- Department of Applied Physics, The Rachel and Selim Benin School of Engineering and Computer Science, The Hebrew University of Jerusalem , Edmond J. Safra Campus, Jerusalem 91904, Israel
| | - Gregory Barshtein
- Department of Biochemistry & Molecular Biology, IMRIC, Faculty of Medicine, The Hebrew University of Jerusalem , Ein Kerem, Jerusalem 91120, Israel
| | - Leonid Livshits
- Department of Biochemistry & Molecular Biology, IMRIC, Faculty of Medicine, The Hebrew University of Jerusalem , Ein Kerem, Jerusalem 91120, Israel
| | - Paul Ben Ishai
- Department of Applied Physics, The Rachel and Selim Benin School of Engineering and Computer Science, The Hebrew University of Jerusalem , Edmond J. Safra Campus, Jerusalem 91904, Israel.,Department of Physics, Ariel University , P.O.B. 3, Ariel 40700, Israel
| | - Yuri Feldman
- Department of Applied Physics, The Rachel and Selim Benin School of Engineering and Computer Science, The Hebrew University of Jerusalem , Edmond J. Safra Campus, Jerusalem 91904, Israel
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17
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Novel Dielectric Coagulometer Identifies Hypercoagulability in Patients with a High CHADS2 Score without Atrial Fibrillation. PLoS One 2016; 11:e0156557. [PMID: 27275926 PMCID: PMC4898832 DOI: 10.1371/journal.pone.0156557] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Accepted: 05/16/2016] [Indexed: 11/23/2022] Open
Abstract
Background Recent reports showed that the CHADS2 score predicted the risk of strokes in patients without atrial fibrillation (AF). Although the hypercoagulability may contribute to the thrombogenesis, it has not been fully investigated due to a lack of a sensitive evaluation modality. Recently a novel dielectric blood coagulometry (DBCM) was invented for evaluating the coagulability by measuring the temporal change in whole blood dielectric permittivity. Objective We evaluated the utility of the DBCM for identifying the coagulability. Patients/Methods For fundamental experiments, 133 citrated blood samples were drawn from subjects with or without heparin administration. A DBCM analysis was performed to find the adequate coagulation index, and to delineate its measurement range by adding recombinant human tissue factor (TF) or heparin. Then the coagulability was assessed by DBCM and conventional coagulation assays in 84 subjects without AF, who were divided into 3 groups by their CHADS2 score. Another 17 patients who received warfarin were also assessed by DBCM to evaluate the effect of anticoagulants. Results and Conclusions We calculated the derivative of the dielectric permittivity change after recalcification, and extracted the end of acceleration time (EAT) as a novel index. The EAT showed a dose-dependent shortening with the addition of serial dilutions of TF (×10−2 to ×10−4), and a dose-dependent prolongation with the addition of heparin (0.05 to 0.15 U/ml). The EAT was significantly shorter in the higher CHADS2 score group (19.8 ± 4.8, 18.6 ± 3.1, and 16.3 ± 2.7 min in the CHADS2 = 0, 1, and ≥2 groups, respectively, p = 0.0065 by ANOVA). Patients receiving warfarin had a significantly more prolonged EAT than those without warfarin (18.6±4.2 vs. 25.8±7.3 min, p <0.001). DBCM detected the whole blood coagulability with a high sensitivity. Subjects with higher CHADS2 scores exhibited hypercoagulability without AF.
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18
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Hayashi Y, Brun MA, Machida K, Nagasawa M. Principles of Dielectric Blood Coagulometry as a Comprehensive Coagulation Test. Anal Chem 2015; 87:10072-9. [DOI: 10.1021/acs.analchem.5b02723] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yoshihito Hayashi
- LOC Development Department, R&D Division, Medical Business Unit, Sony Corporation, in Tokyo Medical and Dental University, 1-5-45 Yushima Bunkyo-ku, Tokyo 113-8510, Japan
| | - Marc-Aurèle Brun
- LOC Development Department, R&D Division, Medical Business Unit, Sony Corporation, in Tokyo Medical and Dental University, 1-5-45 Yushima Bunkyo-ku, Tokyo 113-8510, Japan
| | - Kenzo Machida
- LOC Development Department, R&D Division, Medical Business Unit, Sony Corporation, in Tokyo Medical and Dental University, 1-5-45 Yushima Bunkyo-ku, Tokyo 113-8510, Japan
| | - Masayuki Nagasawa
- Department
of Pediatrics, Tokyo Medical and Dental University, 1-5-45 Yushima
Bunkyo-ku, Tokyo 113-8510, Japan
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19
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Zhuang J, Kolb JF. Time domain dielectric spectroscopy of nanosecond pulsed electric field induced changes in dielectric properties of pig whole blood. Bioelectrochemistry 2015; 103:28-33. [DOI: 10.1016/j.bioelechem.2014.08.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2014] [Revised: 07/29/2014] [Accepted: 08/12/2014] [Indexed: 10/24/2022]
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20
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Heileman K, Daoud J, Tabrizian M. Dielectric spectroscopy as a viable biosensing tool for cell and tissue characterization and analysis. Biosens Bioelectron 2013; 49:348-59. [PMID: 23796534 DOI: 10.1016/j.bios.2013.04.017] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2013] [Accepted: 04/16/2013] [Indexed: 01/03/2023]
Abstract
The use of dielectric spectroscopy to carry out real time observations of cells and to extract a wealth of information about their physiological properties has expanded in recent years. This popularity is due to the simple, easy to use, non-invasive and real time nature of dielectric spectroscopy. The ease of integrating dielectric spectroscopy with microfluidic devices has allowed the technology to further expand into biomedical research. Dielectric spectra are obtained by applying an electrical signal to cells, which is swept over a frequency range. This review covers the different methods of interpreting dielectric spectra and progress made in applications of impedance spectroscopy for cell observations. First, methods of obtaining specific electrical properties of cells (cell membrane capacitance and cytoplasm conductivity) are discussed. These electrical properties are obtained by fitting the dielectric spectra to different models and equations. Integrating models to reduce the effects of the electrical double layer are subsequently covered. Impedance platforms are then discussed including electrical cell substrate impedance sensing (ECIS). Categories of ECIS systems are divided into microelectrode arrays, interdigitated electrodes and those that allow differential ECIS measurements. Platforms that allow single cell and sub-single cell measurements are then discussed. Finally, applications of impedance spectroscopy in a range of cell observations are elaborated. These applications include observing cell differentiation, mitosis and the cell cycle and cytotoxicity/cell death. Future applications such as drug screening and in point of care applications are then covered.
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Affiliation(s)
- Khalil Heileman
- Department of Biomedical Engineering, Faculty of Medicine, McGill University, 3775 University Street, Montreal, Quebec, Canada.
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21
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Massimi M, Stampella A, Devirgiliis LC, Rizzitelli G, Barbetta A, Dentini M, Cametti C. Dielectric characterization of hepatocytes in suspension and embedded into two different polymeric scaffolds. Colloids Surf B Biointerfaces 2012; 102:700-7. [PMID: 23107949 DOI: 10.1016/j.colsurfb.2012.09.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2012] [Revised: 09/06/2012] [Accepted: 09/07/2012] [Indexed: 01/11/2023]
Abstract
The dielectric and conductometric properties of hepatocytes in two different environments (in aqueous suspension and embedded into polymeric scaffolds) have been investigated in the frequency range from 1 kHz to 2 GHz, where the interfacial electrical polarization gives rise to marked dielectric relaxation effects. We analyzed the dielectric behavior of hepatocytes in complete medium aqueous suspensions in the light of effective medium approximation for heterogeneous systems and hepatocytes cultured into two different highly porous and interconnected polymeric structures. In the former case, we have evaluated the passive electrical parameters associated with both the plasmatic and nuclear membrane, finding a general agreement with the values reported elsewhere, based on a partially different analysis of the experimental spectra. In the latter case, we have evaluated the cell growth into two different polymeric scaffolds made of alginate and gelatin with a similar pore distribution and similar inter-connectivity. Based on a qualitative analysis of the dielectric spectra, we were able to provide evidence that alginate scaffolds allow an overall survival of cells better than gelatin scaffold can do. These indications, confirmed by biological tests on cell viability, suggest that hepatocytes embedded in alginate scaffolds are able to perform liver specific functions even over on extended period of time.
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Affiliation(s)
- M Massimi
- Department of Basic and Applied Biology, University of L'Aquila, L'Aquila, Italy
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22
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Guofeng Qiao, Wei Wang, Wei Duan, Fan Zheng, Sinclair AJ, Chatwin CR. Bioimpedance Analysis for the Characterization of Breast Cancer Cells in Suspension. IEEE Trans Biomed Eng 2012; 59:2321-9. [DOI: 10.1109/tbme.2012.2202904] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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23
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Wolf M, Gulich R, Lunkenheimer P, Loidl A. Broadband dielectric spectroscopy on human blood. Biochim Biophys Acta Gen Subj 2011; 1810:727-40. [DOI: 10.1016/j.bbagen.2011.05.012] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2010] [Revised: 04/29/2011] [Accepted: 05/17/2011] [Indexed: 10/18/2022]
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24
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Asami K. Dielectric properties of microvillous cells simulated by the three-dimensional finite-element method. Bioelectrochemistry 2011; 81:28-33. [PMID: 21333613 DOI: 10.1016/j.bioelechem.2011.01.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2010] [Revised: 01/04/2011] [Accepted: 01/11/2011] [Indexed: 11/17/2022]
Abstract
Most of biological cells have microvilli on their surfaces, which significantly influence their dielectric properties. The complex permittivity of a cubical system containing a spherical cell model with cylindrical projections was calculated over a frequency range of 10 kHz to 100 MHz using the three-dimensional finite-element method. The spectra of the complex permittivity consisted of low- and high-frequency relaxation processes which were respectively attributed to the polarization of the membranes covering the projections and the spherical body. Conventional analysis based on the spherical shell model was applied to the simulated spectra to discuss the effects of cell surface morphology on the electric parameters estimated for the plasma membrane and the cytoplasm.
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Affiliation(s)
- Koji Asami
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan.
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25
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Hayashi Y, Katsumoto Y, Omori S, Yasuda A, Asami K, Kaibara M, Uchimura I. Dielectric Coagulometry: A New Approach To Estimate Venous Thrombosis Risk. Anal Chem 2010; 82:9769-74. [DOI: 10.1021/ac101927n] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Yoshihito Hayashi
- Life Science Laboratory, Advanced Materials Laboratories, Sony Corporation, 113-8510 Tokyo, Japan, Laboratory of Molecular Aggregation Analysis, Division of Multidisciplinary Chemistry, Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan, Institute of Physical and Chemical Research (RIKEN), Wako, 351-0198 Saitama, Japan, and Department of Endocrinology and Metabolism, Tokyo Medical and Dental University, 113-8510 Tokyo, Japan
| | - Yoichi Katsumoto
- Life Science Laboratory, Advanced Materials Laboratories, Sony Corporation, 113-8510 Tokyo, Japan, Laboratory of Molecular Aggregation Analysis, Division of Multidisciplinary Chemistry, Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan, Institute of Physical and Chemical Research (RIKEN), Wako, 351-0198 Saitama, Japan, and Department of Endocrinology and Metabolism, Tokyo Medical and Dental University, 113-8510 Tokyo, Japan
| | - Shinji Omori
- Life Science Laboratory, Advanced Materials Laboratories, Sony Corporation, 113-8510 Tokyo, Japan, Laboratory of Molecular Aggregation Analysis, Division of Multidisciplinary Chemistry, Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan, Institute of Physical and Chemical Research (RIKEN), Wako, 351-0198 Saitama, Japan, and Department of Endocrinology and Metabolism, Tokyo Medical and Dental University, 113-8510 Tokyo, Japan
| | - Akio Yasuda
- Life Science Laboratory, Advanced Materials Laboratories, Sony Corporation, 113-8510 Tokyo, Japan, Laboratory of Molecular Aggregation Analysis, Division of Multidisciplinary Chemistry, Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan, Institute of Physical and Chemical Research (RIKEN), Wako, 351-0198 Saitama, Japan, and Department of Endocrinology and Metabolism, Tokyo Medical and Dental University, 113-8510 Tokyo, Japan
| | - Koji Asami
- Life Science Laboratory, Advanced Materials Laboratories, Sony Corporation, 113-8510 Tokyo, Japan, Laboratory of Molecular Aggregation Analysis, Division of Multidisciplinary Chemistry, Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan, Institute of Physical and Chemical Research (RIKEN), Wako, 351-0198 Saitama, Japan, and Department of Endocrinology and Metabolism, Tokyo Medical and Dental University, 113-8510 Tokyo, Japan
| | - Makoto Kaibara
- Life Science Laboratory, Advanced Materials Laboratories, Sony Corporation, 113-8510 Tokyo, Japan, Laboratory of Molecular Aggregation Analysis, Division of Multidisciplinary Chemistry, Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan, Institute of Physical and Chemical Research (RIKEN), Wako, 351-0198 Saitama, Japan, and Department of Endocrinology and Metabolism, Tokyo Medical and Dental University, 113-8510 Tokyo, Japan
| | - Isao Uchimura
- Life Science Laboratory, Advanced Materials Laboratories, Sony Corporation, 113-8510 Tokyo, Japan, Laboratory of Molecular Aggregation Analysis, Division of Multidisciplinary Chemistry, Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan, Institute of Physical and Chemical Research (RIKEN), Wako, 351-0198 Saitama, Japan, and Department of Endocrinology and Metabolism, Tokyo Medical and Dental University, 113-8510 Tokyo, Japan
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Hayashi Y, Katsumoto Y, Oshige I, Omori S, Yasuda A, Asami K. The effects of erythrocyte deformability upon hematocrit assessed by the conductance method. Phys Med Biol 2009; 54:2395-405. [DOI: 10.1088/0031-9155/54/8/009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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