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Park S, Laskow TC, Chen J, Guha P, Dawn B, Kim D. Microphysiological systems for human aging research. Aging Cell 2024; 23:e14070. [PMID: 38180277 PMCID: PMC10928588 DOI: 10.1111/acel.14070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 11/28/2023] [Accepted: 11/30/2023] [Indexed: 01/06/2024] Open
Abstract
Recent advances in microphysiological systems (MPS), also known as organs-on-a-chip (OoC), enable the recapitulation of more complex organ and tissue functions on a smaller scale in vitro. MPS therefore provide the potential to better understand human diseases and physiology. To date, numerous MPS platforms have been developed for various tissues and organs, including the heart, liver, kidney, blood vessels, muscle, and adipose tissue. However, only a few studies have explored using MPS platforms to unravel the effects of aging on human physiology and the pathogenesis of age-related diseases. Age is one of the risk factors for many diseases, and enormous interest has been devoted to aging research. As such, a human MPS aging model could provide a more predictive tool to understand the molecular and cellular mechanisms underlying human aging and age-related diseases. These models can also be used to evaluate preclinical drugs for age-related diseases and translate them into clinical settings. Here, we provide a review on the application of MPS in aging research. First, we offer an overview of the molecular, cellular, and physiological changes with age in several tissues or organs. Next, we discuss previous aging models and the current state of MPS for studying human aging and age-related conditions. Lastly, we address the limitations of current MPS and present future directions on the potential of MPS platforms for human aging research.
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Affiliation(s)
- Seungman Park
- Department of Mechanical EngineeringUniversity of Nevada, Las VegasLas VegasNevadaUSA
| | - Thomas C. Laskow
- Department of MedicineJohns Hopkins University School of MedicineBaltimoreMarylandUSA
| | - Jingchun Chen
- Nevada Institute of Personalized MedicineUniversity of Nevada, Las VegasLas VegasNevadaUSA
| | - Prasun Guha
- Nevada Institute of Personalized MedicineUniversity of Nevada, Las VegasLas VegasNevadaUSA
- School of Life SciencesUniversity of Nevada, Las VegasLas VegasNevadaUSA
| | - Buddhadeb Dawn
- Department of Internal Medicine, Kirk Kerkorian School of MedicineUniversity of Nevada, Las VegasLas VegasNevadaUSA
| | - Deok‐Ho Kim
- Department of MedicineJohns Hopkins University School of MedicineBaltimoreMarylandUSA
- Department of Biomedical EngineeringJohns Hopkins UniversityBaltimoreMarylandUSA
- Center for Microphysiological SystemsJohns Hopkins UniversityBaltimoreMarylandUSA
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2
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González-Martínez E, Moran-Mirabal J. Shrinking Devices: Shape-Memory Polymer Fabrication of Micro-and Nanostructured Electrodes. Chemphyschem 2024; 25:e202300535. [PMID: 38060839 DOI: 10.1002/cphc.202300535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 12/07/2023] [Indexed: 01/06/2024]
Abstract
Since their discovery in the 1940s, shape memory polymers (SMPs) have been used in a broad spectrum of applications for research and industry.[1] SMPs can adopt a temporary shape and promptly return to their original form when submitted to an external stimulus. They have proven useful in fields such as wearable and stretchable electronics,[2] biomedicine,[3] and aerospace..[4] These materials are attractive and unique due to their ability to "remember" a shape after being submitted to elastic deformation. By combining the properties of SMPs with the advantages of electrochemistry, opportunities have emerged to develop structured sensing devices through simple and inexpensive fabrication approaches. The use of electrochemistry for signal transduction provides several advantages, including the translation into inexpensive sensing devices that are relatively easy to miniaturize, extremely low concentration requirements for detection, rapid sensing, and multiplexed detection. Thus, electrochemistry has been used in biosensing,[5] pollutant detection,[6] and pharmacological[7] applications, among others. To date, there is no review that summarizes the literature addressing the use of SMPs in the fabrication of structured electrodes for electrochemical sensing. This review aims to fill this gap by compiling the research that has been done on this topic over the last decade.
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Affiliation(s)
- Eduardo González-Martínez
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada, L8S 4M1
| | - Jose Moran-Mirabal
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada, L8S 4M1
- School of Biomedical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada, L8S 4M1
- Centre for Advanced Light Microscopy, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada, L8S 4M1
- Brockhouse Institute for Materials Research, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada, L8S 4 M1
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3
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Lou C, Yang H, Hou Y, Huang H, Qiu J, Wang C, Sang Y, Liu H, Han L. Microfluidic Platforms for Real-Time In Situ Monitoring of Biomarkers for Cellular Processes. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2307051. [PMID: 37844125 DOI: 10.1002/adma.202307051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 09/05/2023] [Indexed: 10/18/2023]
Abstract
Cellular processes are mechanisms carried out at the cellular level that are aimed at guaranteeing the stability of the organism they comprise. The investigation of cellular processes is key to understanding cell fate, understanding pathogenic mechanisms, and developing new therapeutic technologies. Microfluidic platforms are thought to be the most powerful tools among all methodologies for investigating cellular processes because they can integrate almost all types of the existing intracellular and extracellular biomarker-sensing methods and observation approaches for cell behavior, combined with precisely controlled cell culture, manipulation, stimulation, and analysis. Most importantly, microfluidic platforms can realize real-time in situ detection of secreted proteins, exosomes, and other biomarkers produced during cell physiological processes, thereby providing the possibility to draw the whole picture for a cellular process. Owing to their advantages of high throughput, low sample consumption, and precise cell control, microfluidic platforms with real-time in situ monitoring characteristics are widely being used in cell analysis, disease diagnosis, pharmaceutical research, and biological production. This review focuses on the basic concepts, recent progress, and application prospects of microfluidic platforms for real-time in situ monitoring of biomarkers in cellular processes.
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Affiliation(s)
- Chengming Lou
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Hongru Yang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Ying Hou
- Institute for Advanced Interdisciplinary Research (IAIR), University of Jinan, Jinan, 250022, P. R. China
| | - Haina Huang
- Institute for Advanced Interdisciplinary Research (IAIR), University of Jinan, Jinan, 250022, P. R. China
| | - Jichuan Qiu
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Chunhua Wang
- Institute for Advanced Interdisciplinary Research (IAIR), University of Jinan, Jinan, 250022, P. R. China
| | - Yuanhua Sang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Hong Liu
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
- Institute for Advanced Interdisciplinary Research (IAIR), University of Jinan, Jinan, 250022, P. R. China
| | - Lin Han
- Institute of Marine Science and Technology, Shandong University, Qingdao, Shandong, 266000, P. R. China
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Utagawa Y, Ino K, Hiramoto K, Iwase K, Nashimoto Y, Honma I, Shiku H. Vasculature-on-a-Chip with a Porous Membrane Electrode for In Situ Electrochemical Detection of Nitric Oxide Released from Endothelial Cells. Anal Chem 2023; 95:18158-18165. [PMID: 38014683 DOI: 10.1021/acs.analchem.3c03684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Vasculature-on-a-chip is a microfluidic cell culture device used for modeling vascular functions by culturing endothelial cells. Porous membranes are widely used to create cell culture environments. However, in situ real-time measurements of cellular metabolites in microchannels are challenging. In this study, a novel microfluidic device with a porous membrane electrode was developed for the in situ monitoring of nitric oxide (NO) released by endothelial cells in real time. In this system, a porous Au membrane electrode was placed directly beneath the cells for in situ and real-time measurements of NO, a biomarker of endothelial cells. First, the device was electrochemically characterized to construct a calibration plot for NO. Next, NO released by human umbilical vein endothelial cells under l-arginine stimulation was successfully quantified. Furthermore, the changes in NO release with culture time (in days) using the same sample were successfully recorded by exploiting minimally invasive measurements. This is the first report on the combination of a microfluidic device and porous membrane electrode for the electrochemical analysis of endothelial cells. This device will contribute to the development of organ-on-a-chip technology for real-time in situ cell analyses.
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Affiliation(s)
- Yoshinobu Utagawa
- Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
| | - Kosuke Ino
- Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
| | - Kaoru Hiramoto
- Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Sendai 980-0845, Japan
| | - Kazuyuki Iwase
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - Yuji Nashimoto
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Tokyo 101-0062, Japan
| | - Itaru Honma
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - Hitoshi Shiku
- Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
- Graduate School of Environmental Studies, Tohoku University, Sendai 980-8759, Japan
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5
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Yousafzai MS, Hammer JA. Using Biosensors to Study Organoids, Spheroids and Organs-on-a-Chip: A Mechanobiology Perspective. BIOSENSORS 2023; 13:905. [PMID: 37887098 PMCID: PMC10605946 DOI: 10.3390/bios13100905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 09/13/2023] [Accepted: 09/19/2023] [Indexed: 10/28/2023]
Abstract
The increasing popularity of 3D cell culture models is being driven by the demand for more in vivo-like conditions with which to study the biochemistry and biomechanics of numerous biological processes in health and disease. Spheroids and organoids are 3D culture platforms that self-assemble and regenerate from stem cells, tissue progenitor cells or cell lines, and that show great potential for studying tissue development and regeneration. Organ-on-a-chip approaches can be used to achieve spatiotemporal control over the biochemical and biomechanical signals that promote tissue growth and differentiation. These 3D model systems can be engineered to serve as disease models and used for drug screens. While culture methods have been developed to support these 3D structures, challenges remain to completely recapitulate the cell-cell and cell-matrix biomechanical interactions occurring in vivo. Understanding how forces influence the functions of cells in these 3D systems will require precise tools to measure such forces, as well as a better understanding of the mechanobiology of cell-cell and cell-matrix interactions. Biosensors will prove powerful for measuring forces in both of these contexts, thereby leading to a better understanding of how mechanical forces influence biological systems at the cellular and tissue levels. Here, we discussed how biosensors and mechanobiological research can be coupled to develop accurate, physiologically relevant 3D tissue models to study tissue development, function, malfunction in disease, and avenues for disease intervention.
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Affiliation(s)
- Muhammad Sulaiman Yousafzai
- Cell and Developmental Biology Center, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - John A. Hammer
- Cell and Developmental Biology Center, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA
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6
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Zhao N, Yu Z, Huang J, Liu Y, Zhao Y, Fu X, Yang P, Liu K. Non-invasive monitoring of biochemicals in hydrogel-assisted microfluidic chips. NANOSCALE 2023; 15:6179-6186. [PMID: 36912469 DOI: 10.1039/d2nr06042f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Microfluidic chips are prevailingly utilized in biochemical monitoring and clinical diagnostics due to their capability of manipulating minuscule amounts of liquids in a highly integrated manner. Fabrication of microchannels on chips is commonly based on glass or polydimethylsiloxane, and sensing of the fluids and biochemicals within them relies on invasive embedded sensing accessories in the channels. In this study, we propose a hydrogel-assisted microfluidic chip for non-invasive monitoring of chemicals in microfluidics. A nanoporous hydrogel acts as a perfect sealing film on top of a microchannel to encapsulate liquid, and allows for the delivery of target biochemicals to its surface, leaving an open window for non-invasive analysis. This functionally "open" microchannel can be integrated with various electrical, electrochemical, and optical methods to realize accurate detection of biochemicals, suggesting the potential of hydrogel microfluidic chips for non-invasive clinical diagnostics and smart healthcare.
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Affiliation(s)
- Na Zhao
- MOE Key Laboratory of Hydraulic Machinery Transients, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China.
| | - Zehua Yu
- MOE Key Laboratory of Hydraulic Machinery Transients, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China.
| | - Jun Huang
- MOE Key Laboratory of Hydraulic Machinery Transients, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China.
| | - Yuxi Liu
- MOE Key Laboratory of Hydraulic Machinery Transients, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China.
| | - Yifan Zhao
- MOE Key Laboratory of Hydraulic Machinery Transients, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China.
| | - Xiangqian Fu
- MOE Key Laboratory of Hydraulic Machinery Transients, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China.
| | - Peihua Yang
- Institute of Technological Sciences, Wuhan University, Wuhan 430072, China
| | - Kang Liu
- MOE Key Laboratory of Hydraulic Machinery Transients, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China.
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7
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Nashimoto Y, Mukomoto R, Imaizumi T, Terai T, Shishido S, Ino K, Yokokawa R, Miura T, Onuma K, Inoue M, Shiku H. Electrochemical sensing of oxygen metabolism for a three-dimensional cultured model with biomimetic vascular flow. Biosens Bioelectron 2023; 219:114808. [PMID: 36327566 DOI: 10.1016/j.bios.2022.114808] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 10/06/2022] [Accepted: 10/11/2022] [Indexed: 11/06/2022]
Abstract
Microphysiological systems (MPSs) with three-dimensional (3D) cultured models have attracted considerable interest because of their potential to mimic human health and disease conditions. Recent MPSs have shown significant advancements in engineering perfusable vascular networks integrated with 3D culture models, realizing a more physiological environment in vitro; however, a sensing system that can monitor their activity under biomimetic vascular flow is lacking. We designed an open-top microfluidic device with sensor capabilities and demonstrated its application in analyzing oxygen metabolism in vascularized 3D tissue models. We first validated the platform by using human lung fibroblast (hLF) spheroids. Then, we applied the platform to a patient-derived cancer organoid and evaluated the changes in oxygen metabolism during drug administration through the vascular network. We found that the platform could integrate a perfusable vascular network with 3D cultured cells, and the electrochemical sensor could detect the change in oxygen metabolism in a quantitative, non-invasive, and real-time manner. This platform would become a monitoring system for 3D cultured cells integrated with a perfusable vascular network.
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Affiliation(s)
- Yuji Nashimoto
- Frontier Research Institute for Interdisciplinary Sciences (FRIS), Tohoku University, Miyagi, 980-8578, Japan; Graduate School of Engineering, Tohoku University, Miyagi, 980-8579, Japan; Graduate School of Environmental Studies, Tohoku University, Miyagi, 980-8579, Japan.
| | - Rei Mukomoto
- Graduate School of Environmental Studies, Tohoku University, Miyagi, 980-8579, Japan
| | - Takuto Imaizumi
- Graduate School of Environmental Studies, Tohoku University, Miyagi, 980-8579, Japan
| | - Takato Terai
- Graduate School of Environmental Studies, Tohoku University, Miyagi, 980-8579, Japan
| | - Shotaro Shishido
- Graduate School of Environmental Studies, Tohoku University, Miyagi, 980-8579, Japan
| | - Kosuke Ino
- Graduate School of Engineering, Tohoku University, Miyagi, 980-8579, Japan
| | - Ryuji Yokokawa
- Department of Micro Engineering, Kyoto University, Kyoto, 615-8540, Japan
| | - Takashi Miura
- Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| | - Kunishige Onuma
- Graduate School of Medicine, Kyoto University, Kyoto, 606-8501, Japan
| | - Masahiro Inoue
- Graduate School of Medicine, Kyoto University, Kyoto, 606-8501, Japan
| | - Hitoshi Shiku
- Graduate School of Engineering, Tohoku University, Miyagi, 980-8579, Japan; Graduate School of Environmental Studies, Tohoku University, Miyagi, 980-8579, Japan.
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8
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A new angle to control concentration profiles at electroactive biofilm interfaces: investigating a microfluidic perpendicular flow approach. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.141071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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9
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Dong Z, Wang Y, Yin D, Hang X, Pu L, Zhang J, Geng J, Chang L. Advanced techniques for gene heterogeneity research: Single‐cell sequencing and on‐chip gene analysis systems. VIEW 2022. [DOI: 10.1002/viw.20210011] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Affiliation(s)
- Zaizai Dong
- Key Laboratory of Biomechanics and Mechanobiology, Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering Beihang University Beijing China
| | - Yu Wang
- Department of Laboratory Medicine State Key Laboratory of Biotherapy and Cancer Center West China Hospital Sichuan University/Collaborative Innovation Center Chengdu China
| | - Dedong Yin
- Key Laboratory of Biomechanics and Mechanobiology, Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering Beihang University Beijing China
| | - Xinxin Hang
- Key Laboratory of Biomechanics and Mechanobiology, Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering Beihang University Beijing China
| | - Lei Pu
- Department of Laboratory Medicine State Key Laboratory of Biotherapy and Cancer Center West China Hospital Sichuan University/Collaborative Innovation Center Chengdu China
| | - Jianfu Zhang
- Department of Laboratory Medicine State Key Laboratory of Biotherapy and Cancer Center West China Hospital Sichuan University/Collaborative Innovation Center Chengdu China
| | - Jia Geng
- Department of Laboratory Medicine State Key Laboratory of Biotherapy and Cancer Center West China Hospital Sichuan University/Collaborative Innovation Center Chengdu China
| | - Lingqian Chang
- Key Laboratory of Biomechanics and Mechanobiology, Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering Beihang University Beijing China
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10
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Ino K, Pai HJ, Hiramoto K, Utagawa Y, Nashimoto Y, Shiku H. Electrochemical Imaging of Endothelial Permeability Using a Large-Scale Integration-Based Device. ACS OMEGA 2021; 6:35476-35483. [PMID: 34984279 PMCID: PMC8717544 DOI: 10.1021/acsomega.1c04931] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 11/19/2021] [Indexed: 06/14/2023]
Abstract
It is important to clarify the transport of biomolecules and chemicals to tissues. Herein, we present an electrochemical imaging method for evaluating the endothelial permeability. In this method, the diffusion of electrochemical tracers, [Fe(CN)6]4-, through a monolayer of human umbilical vein endothelial cells (HUVECs) was monitored using a large-scale integration-based device containing 400 electrodes. In conventional tracer-based assays, tracers that diffuse through an HUVEC monolayer into another channel are detected. In contrast, the present method does not employ separated channels. In detail, a HUVEC monolayer is immersed in a solution containing [Fe(CN)6]4- on the device. As [Fe(CN)6]4- is oxidized and consumed at the packed electrodes, [Fe(CN)6]4- begins to diffuse through the monolayer from the bulk solution to the electrodes and the obtained currents depend on the endothelial permeability. As a proof-of-concept, the effects of histamine on the monolayer were monitored. Also, an HUVEC monolayer was cocultured with cancer spheroids, and the endothelial permeability was monitored to evaluate the metastasis of the cancer spheroids. Unlike conventional methods, the device can provide spatial information, allowing the interaction between the monolayer and the spheroids to be monitored. The developed method is a promising tool for organs-on-a-chip and drug screening in vitro.
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Affiliation(s)
- Kosuke Ino
- Graduate
School of Engineering, Tohoku University, 6-6-11 Aramaki-aza Aoba, Aoba-ku, Sendai 980-8579, Japan
| | - Hao-Jen Pai
- Graduate
School of Environmental Studies, Tohoku
University, 6-6-11 Aramaki-aza Aoba, Aoba-ku, Sendai 980-8579, Japan
| | - Kaoru Hiramoto
- Graduate
School of Environmental Studies, Tohoku
University, 6-6-11 Aramaki-aza Aoba, Aoba-ku, Sendai 980-8579, Japan
| | - Yoshinobu Utagawa
- Graduate
School of Environmental Studies, Tohoku
University, 6-6-11 Aramaki-aza Aoba, Aoba-ku, Sendai 980-8579, Japan
| | - Yuji Nashimoto
- Graduate
School of Engineering, Tohoku University, 6-6-11 Aramaki-aza Aoba, Aoba-ku, Sendai 980-8579, Japan
- Frontier
Research Institute for Interdisciplinary Sciences, Tohoku University, 6-3 Aramaki-aza Aoba, Aoba-ku, Sendai 980-8578, Japan
| | - Hitoshi Shiku
- Graduate
School of Engineering, Tohoku University, 6-6-11 Aramaki-aza Aoba, Aoba-ku, Sendai 980-8579, Japan
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11
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Multiplexed assessment of engineered bacterial constructs for intracellular β-galactosidase expression by redox amplification on catechol-chitosan modified nanoporous gold. Mikrochim Acta 2021; 189:4. [PMID: 34855041 DOI: 10.1007/s00604-021-05109-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Accepted: 11/11/2021] [Indexed: 10/19/2022]
Abstract
Synthetic biology approaches for rewiring of bacterial constructs to express particular intracellular factors upon induction with the target analyte are emerging as sensing paradigms for applications in environmental and in vivo monitoring. To aid in the design and optimization of bacterial constructs for sensing analytes, there is a need for lysis-free intracellular detection modalities that monitor the signal level and kinetics of expressed factors within different modified bacteria in a multiplexed manner, without requiring cumbersome surface immobilization. Herein, an electrochemical detection system on nanoporous gold that is electrofabricated with a biomaterial redox capacitor is presented for quantifying β-galactosidase expressed inside modified Escherichia coli constructs upon induction with dopamine. This nanostructure-mediated redox amplification approach on a microfluidic platform allows for multiplexed assessment of the expressed intracellular factors from different bacterial constructs suspended in distinct microchannels, with no need for cell lysis or immobilization. Since redox mediators present over the entire depth of the microchannel can interact with the electrode and with the E. coli construct in each channel, the platform exhibits high sensitivity and enables multiplexing. We envision its application in assessing synthetic biology-based approaches for comparing specificity, sensitivity, and signal response time upon induction with target analytes of interest.
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12
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Mohd Asri MA, Nordin AN, Ramli N. Low-cost and cleanroom-free prototyping of microfluidic and electrochemical biosensors: Techniques in fabrication and bioconjugation. BIOMICROFLUIDICS 2021; 15:061502. [PMID: 34777677 PMCID: PMC8577868 DOI: 10.1063/5.0071176] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 10/22/2021] [Indexed: 05/18/2023]
Abstract
Integrated microfluidic biosensors enable powerful microscale analyses in biology, physics, and chemistry. However, conventional methods for fabrication of biosensors are dependent on cleanroom-based approaches requiring facilities that are expensive and are limited in access. This is especially prohibitive toward researchers in low- and middle-income countries. In this topical review, we introduce a selection of state-of-the-art, low-cost prototyping approaches of microfluidics devices and miniature sensor electronics for the fabrication of sensor devices, with focus on electrochemical biosensors. Approaches explored include xurography, cleanroom-free soft lithography, paper analytical devices, screen-printing, inkjet printing, and direct ink writing. Also reviewed are selected surface modification strategies for bio-conjugates, as well as examples of applications of low-cost microfabrication in biosensors. We also highlight several factors for consideration when selecting microfabrication methods appropriate for a project. Finally, we share our outlook on the impact of these low-cost prototyping strategies on research and development. Our goal for this review is to provide a starting point for researchers seeking to explore microfluidics and biosensors with lower entry barriers and smaller starting investment, especially ones from low resource settings.
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Affiliation(s)
- Mohd Afiq Mohd Asri
- Department of Electrical and Computer Engineering, Kulliyyah of Engineering, International Islamic University Malaysia, 53100 Gombak, Selangor, Malaysia
| | - Anis Nurashikin Nordin
- Department of Electrical and Computer Engineering, Kulliyyah of Engineering, International Islamic University Malaysia, 53100 Gombak, Selangor, Malaysia
- Author to whom correspondence should be addressed:
| | - Nabilah Ramli
- Department of Mechanical Engineering, Kulliyyah of Engineering, International Islamic University Malaysia, 53100 Gombak, Selangor, Malaysia
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13
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Yin B, Wan X, Qian C, Sohan ASMMF, Wang S, Zhou T. Point-of-Care Testing for Multiple Cardiac Markers Based on a Snail-Shaped Microfluidic Chip. Front Chem 2021; 9:741058. [PMID: 34671590 PMCID: PMC8521045 DOI: 10.3389/fchem.2021.741058] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 09/02/2021] [Indexed: 11/19/2022] Open
Abstract
Existing methods for detecting cardiac markers are difficult to be applied in point-of-care testing (POCT) due to complex operation, long time consumption, and low sensitivity. Here, we report a snail-shaped microfluidic chip (SMC) for the multiplex detection of cTnI, CK-MB, and Myo with high sensitivity and a short detection time. The SMC consists of a sandwich structure: a channel layer with a mixer and reaction zone, a reaction layer coated with capture antibodies, and a base layer. The opening or closing of the microchannels is realized by controlling the downward movement of the press-type mechanical valve. The chemiluminescence method was used as a signal readout, and the experimental conditions were optimized. SMC could detect cTnI, CK-MB, and Myo at concentrations as low as 1.02, 1.37, and 4.15. The SMC will be a promising platform for a simultaneous determination of multianalytes and shows a potential application in POCT.
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Affiliation(s)
- Binfeng Yin
- School of Mechanical Engineering, Yangzhou University, Yangzhou, China
| | - Xinhua Wan
- School of Mechanical Engineering, Yangzhou University, Yangzhou, China
| | - Changcheng Qian
- School of Mechanical Engineering, Yangzhou University, Yangzhou, China
| | | | - Songbai Wang
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, China
| | - Teng Zhou
- Mechanical and Electrical Engineering College, Hainan University, Haikou, China
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Utagawa Y, Hiramoto K, Nashimoto Y, Ino K, Shiku H. In vitro electrochemical assays for vascular cells and organs. ELECTROCHEMICAL SCIENCE ADVANCES 2021. [DOI: 10.1002/elsa.202100089] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Affiliation(s)
- Yoshinobu Utagawa
- Graduate School of Environmental Studies Tohoku University Aoba‐ku Sendai Japan
| | - Kaoru Hiramoto
- Graduate School of Environmental Studies Tohoku University Aoba‐ku Sendai Japan
| | - Yuji Nashimoto
- Frontier Research Institute for Interdisciplinary Sciences Tohoku University Aoba‐ku Sendai Japan
- Graduate School of Engineering Tohoku University Aoba‐ku Sendai Japan
| | - Kosuke Ino
- Graduate School of Engineering Tohoku University Aoba‐ku Sendai Japan
| | - Hitoshi Shiku
- Graduate School of Engineering Tohoku University Aoba‐ku Sendai Japan
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15
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Ramadan Q, Fardous RS, Hazaymeh R, Alshmmari S, Zourob M. Pharmacokinetics-On-a-Chip: In Vitro Microphysiological Models for Emulating of Drugs ADME. Adv Biol (Weinh) 2021; 5:e2100775. [PMID: 34323392 DOI: 10.1002/adbi.202100775] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 06/08/2021] [Indexed: 12/15/2022]
Abstract
Despite many ongoing efforts across the full spectrum of pharmaceutical and biotech industries, drug development is still a costly undertaking that involves a high risk of failure during clinical trials. Animal models played vital roles in understanding the mechanism of human diseases. However, the use of these models has been a subject of heated debate, particularly due to ethical matters and the inevitable pathophysiological differences between animals and humans. Current in vitro models lack the sufficient functionality and predictivity of human pharmacokinetics and toxicity, therefore, are not capable to fully replace animal models. The recent development of micro-physiological systems has shown great potential as indispensable tools for recapitulating key physiological parameters of humans and providing in vitro methods for predicting the pharmacokinetics and pharmacodynamics in humans. Integration of Absorption, Distribution, Metabolism, and Excretion (ADME) processes within one close in vitro system is a paramount development that would meet important unmet pharmaceutical industry needs. In this review paper, synthesis of the ADME-centered organ-on-a-chip technology is systemically presented from what is achieved to what needs to be done, emphasizing the requirements of in vitro models that meet industrial needs in terms of the structure and functions.
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Affiliation(s)
- Qasem Ramadan
- Alfaisal University, Riyadh, 11533, Kingdom of Saudi Arabia
| | - Roa Saleem Fardous
- Alfaisal University, Riyadh, 11533, Kingdom of Saudi Arabia.,Strathclyde Institute of Pharmacy and Biomedical Sciences, Strathclyde University, Glasgow, G4 0RE, United Kingdom
| | - Rana Hazaymeh
- Almaarefa University, Riyadh, 13713, Kingdom of Saudi Arabia
| | - Sultan Alshmmari
- Saudi Food and Drug Authority, Riyadh, 13513-7148, Kingdom of Saudi Arabia
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16
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Recent advances in single-cell analysis: Encapsulation materials, analysis methods and integrative platform for microfluidic technology. Talanta 2021; 234:122671. [PMID: 34364472 DOI: 10.1016/j.talanta.2021.122671] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 06/24/2021] [Accepted: 06/26/2021] [Indexed: 12/27/2022]
Abstract
Traditional cell biology researches on cell populations by their origin, tissue, morphology, and secretions. Because of the heterogeneity of cells, research at the single-cell level can obtain more accurate and comprehensive information that reflects the physiological state and process of the cell, increasing the significance of single-cell analysis. The application of single-cell analysis is faced with the problem of contaminated or damaged cells caused by cell sample transportation. Reversible encapsulation of a single cell can protect cells from the external environment and open the encapsulation shell to release cells, thus preserving cell integrity and improving extraction efficiency of analytes. Meanwhile, microfluidic single cell analysis (MSCA) exhibits integration, miniaturization, and high throughput, which can considerably improve the efficiency of single-cell analysis. The researches on single-cell reversible encapsulation materials, single-cell analysis methods, and the MSCA integration platform are analyzed and summarized in this review. The problems of single-cell viability, network of single-cell signal, and simultaneous detection of multiple biotoxins in food based on single-cell are proposed for future research.
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17
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Ferguson C, Pini N, Du X, Farina M, Hwang JMC, Pietrangelo T, Cheng X. Broadband electrical impedance as a novel characterization of oxidative stress in single L6 skeletal muscle cells. Anal Chim Acta 2021; 1173:338678. [PMID: 34172152 DOI: 10.1016/j.aca.2021.338678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 05/18/2021] [Accepted: 05/20/2021] [Indexed: 11/19/2022]
Abstract
Oxidative stress (OS) is one of the leading causes of cytotoxicity and is linked to many human physio-pathological conditions. In particular, myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) induced by OS is debilitating to quality of life, while no clear biological markers have been identified for diagnostic measures. Recently, impedance measurements of peripheral blood cells of ME/CFS patients have been shown as a promising approach to diagnose the disease. Inspired by this study and aiming to interrogate muscle cells directly, we investigated if broadband measurements of single muscle cells could differentiate normal and oxidatively stressed cell populations. We first optimized a protocol through H2O2 treatment to introduce oxidative stress to cultured rat L6 skeletal muscle cells. The treated cells were further characterized through broadband impedance spectroscopy of single cells using a microfluidic lab-on-a-chip system. The resulting dielectric properties of cytoplasm permittivity and conductivity are electrically distinct from normally cultured cells. The reflection and transmission coefficients, ΔS11 and ΔS21, of the normal cells are tightly clustered and closely resemble those of the cell-free solution across the frequency range of 9 kHz to 9 GHz. On the other hand, dielectric properties of the oxidized cells have a wide distribution in the GHz range, deviating both in the positive and negative directions from the normally cultured cells. Simulation results guide our hypothesis that the dielectric differences could be linked to ion alterations, while calcium imaging directly supports the contribution of calcium flux to the observed deviation of S parameters. The unique electrical profile associated with oxidized cells in the GHz frequencies provide a framework for future development of technologies to diagnose oxidative-stress related diseases such as ME/CFS.
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Affiliation(s)
| | - Niccolo Pini
- Department of Neuroscience, Imaging, and Clinical Science, University G. D'Annuzio, Chieti-Pescara, Italy
| | - Xiaotian Du
- Department of Electrical Engineering, Lehigh University, Bethlehem, PA, USA
| | - Marco Farina
- Department of Engineering of Information, University Politecnica delle Marche, Marche, Italy
| | - James M C Hwang
- Department of Electrical Engineering, Lehigh University, Bethlehem, PA, USA
| | - Tiziana Pietrangelo
- Department of Neuroscience, Imaging, and Clinical Science, University G. D'Annuzio, Chieti-Pescara, Italy
| | - Xuanhong Cheng
- Department of Bioengineering, Lehigh University, Bethlehem, PA, USA; Department of Materials Science and Engineering, Lehigh University, Bethlehem, PA, USA.
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18
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Review of Microfluidic Methods for Cellular Lysis. MICROMACHINES 2021; 12:mi12050498. [PMID: 33925101 PMCID: PMC8145176 DOI: 10.3390/mi12050498] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Revised: 04/18/2021] [Accepted: 04/21/2021] [Indexed: 02/06/2023]
Abstract
Cell lysis is a process in which the outer cell membrane is broken to release intracellular constituents in a way that important information about the DNA or RNA of an organism can be obtained. This article is a thorough review of reported methods for the achievement of effective cellular boundaries disintegration, together with their technological peculiarities and instrumental requirements. The different approaches are summarized in six categories: chemical, mechanical, electrical methods, thermal, laser, and other lysis methods. Based on the results derived from each of the investigated reports, we outline the advantages and disadvantages of those techniques. Although the choice of a suitable method is highly dependent on the particular requirements of the specific scientific problem, we conclude with a concise table where the benefits of every approach are compared, based on criteria such as cost, efficiency, and difficulty.
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19
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Bakht SM, Pardo A, Gómez-Florit M, Reis RL, Domingues RMA, Gomes ME. Engineering next-generation bioinks with nanoparticles: moving from reinforcement fillers to multifunctional nanoelements. J Mater Chem B 2021; 9:5025-5038. [PMID: 34014245 DOI: 10.1039/d1tb00717c] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The application of additive manufacturing in the biomedical field has become a hot topic in the last decade owing to its potential to provide personalized solutions for patients. Different bioinks have been designed trying to obtain a unique concoction that addresses all the needs for tissue engineering and drug delivery purposes, among others. Despite the remarkable progress made, the development of suitable bioinks which combine printability, cytocompatibility, and biofunctionality is still a challenge. In this sense, the well-established synthetic and functionalization routes to prepare nanoparticles with different functionalities make them excellent candidates to be combined with polymeric systems in order to generate suitable multi-functional bioinks. In this review, we briefly discuss the most recent advances in the design of functional nanocomposite hydrogels considering their already evaluated or potential use as bioinks. The scientific development over the last few years is reviewed, focusing the discussion on the wide range of functionalities that can be incorporated into 3D bioprinted constructs through the addition of multifunctional nanoparticles in order to increase their regenerative potential in the field of tissue engineering.
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Affiliation(s)
- Syeda M Bakht
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciencia e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal. and ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Alberto Pardo
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciencia e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal. and ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal and Colloids and Polymers Physics Group, Particle Physics Department and Health Research Institute, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Manuel Gómez-Florit
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciencia e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal. and ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Rui L Reis
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciencia e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal. and ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Rui M A Domingues
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciencia e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal. and ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Manuela E Gomes
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciencia e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal. and ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
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20
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Hernández-Rodríguez JF, Rojas D, Escarpa A. Electrochemical Sensing Directions for Next-Generation Healthcare: Trends, Challenges, and Frontiers. Anal Chem 2020; 93:167-183. [PMID: 33174738 DOI: 10.1021/acs.analchem.0c04378] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Juan F Hernández-Rodríguez
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Sciences, University of Alcalá, E-28871 Alcalá de Henares, Madrid, Spain
| | - Daniel Rojas
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Sciences, University of Alcalá, E-28871 Alcalá de Henares, Madrid, Spain.,Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, 64100 Teramo, Italy
| | - Alberto Escarpa
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Sciences, University of Alcalá, E-28871 Alcalá de Henares, Madrid, Spain.,Chemical Research Institute Andres M. del Rio, University of Alcalá, E-28871 Madrid, Spain
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21
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In-situ monitoring of glucose metabolism in cancer cell microenvironments based on hollow fiber structure. Biosens Bioelectron 2020; 162:112261. [DOI: 10.1016/j.bios.2020.112261] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2019] [Revised: 04/18/2020] [Accepted: 04/28/2020] [Indexed: 01/01/2023]
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22
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Martín Várguez P, Brunel F, Raimundo JM. Recent Electrochemical/Electrical Microfabricated Sensor Devices for Ionic and Polyionic Analytes. ACS OMEGA 2020; 5:4733-4742. [PMID: 32201758 PMCID: PMC7081253 DOI: 10.1021/acsomega.9b04331] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 02/12/2020] [Indexed: 05/06/2023]
Abstract
The recent technological advances combined with the development of new concepts and strategies have revolutionized the field of sensor devices, allowing access to increasingly sophisticated device structures associated with high sensitivities and selectivities. Among them, electrochemical and electrical sensors have gained the most interest because they offer unique intrinsic characteristics and meet the requirements to be integrated in more sophisticated devices including microfluidics or lab-on-chips, opening access to multiplex and all-in-one detection devices. In the present article, we outline and provide a short and concise overview on the most recent achievements in the field of electrical detection of ionic species as they display versatile roles in many important biological events and are ubiquitous in environment.
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23
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Ino K, Ozawa F, Dang N, Hiramoto K, Hino S, Akasaka R, Nashimoto Y, Shiku H. Biofabrication Using Electrochemical Devices and Systems. ACTA ACUST UNITED AC 2020; 4:e1900234. [DOI: 10.1002/adbi.201900234] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Revised: 12/01/2019] [Indexed: 02/07/2023]
Affiliation(s)
- Kosuke Ino
- Graduate School of Engineering Tohoku University 6‐6‐11 Aramaki‐aza Aoba Aoba‐ku Sendai 980–8579 Japan
| | - Fumisato Ozawa
- Institute of Industrial Science The University of Tokyo 4‐6‐1 Komaba Meguro‐ku Tokyo 153–8505 Japan
| | - Ning Dang
- Laboratoire de Chimie Physique et Microbiologie pour les Matériaux et l'Environnement CNRS‐Université de Lorraine Villers‐lès‐Nancy 54600 France
| | - Kaoru Hiramoto
- Graduate School of Environmental Studies Tohoku University 6‐6‐11 Aramaki‐aza Aoba Aoba‐ku Sendai 980–8579 Japan
| | - Shodai Hino
- Graduate School of Environmental Studies Tohoku University 6‐6‐11 Aramaki‐aza Aoba Aoba‐ku Sendai 980–8579 Japan
| | - Rise Akasaka
- School of Engineering Tohoku University 6‐6‐11 Aramaki‐aza Aoba Aoba‐ku Sendai 980–8579 Japan
| | - Yuji Nashimoto
- Graduate School of Engineering Tohoku University 6‐6‐11 Aramaki‐aza Aoba Aoba‐ku Sendai 980–8579 Japan
- Frontier Research Institute for Interdisciplinary Sciences Tohoku University 6‐3 Aramaki‐aza Aoba Aoba‐ku Sendai 980–8578 Japan
| | - Hitoshi Shiku
- Graduate School of Engineering Tohoku University 6‐6‐11 Aramaki‐aza Aoba Aoba‐ku Sendai 980–8579 Japan
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