1
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Huang SH, Amemiya S. Transient theory for scanning electrochemical microscopy of biological membrane transport: uncovering membrane-permeant interactions. Analyst 2024; 149:3115-3122. [PMID: 38647017 PMCID: PMC11131039 DOI: 10.1039/d4an00411f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2024] [Accepted: 04/15/2024] [Indexed: 04/25/2024]
Abstract
Scanning electrochemical microscopy (SECM) has emerged as a powerful method to quantitatively investigate the transport of molecules and ions across various biological membranes as represented by living cells. Advantageously, SECM allows for the in situ and non-destructive imaging and measurement of high membrane permeability under simple steady-state conditions, thereby facilitating quantitative data analysis. The SECM method, however, has not provided any information about the interactions of a transported species, i.e., a permeant, with a membrane through its components, e.g., lipids, channels, and carriers. Herein, we propose theoretically that SECM enables the quantitative investigation of membrane-permeant interactions by employing transient conditions. Specifically, we model the membrane-permeant interactions based on a Langmuir-type isotherm to define the strength and kinetics of the interactions as well as the concentration of interaction sites. Finite element simulation predicts that each of the three parameters uniquely affects the chronoamperometric current response of an SECM tip to a permeant. Significantly, this prediction implies that all three parameters are determinable from an experimental chronoamperometric response of the SECM tip. Complimentarily, the steady-state current response of the SECM tip yields the overall membrane permeability based on the combination of the three parameters. Interestingly, our simulation also reveals the optimum strength of membrane-permeant interactions to maximize the transient flux of the permeant from the membrane to the tip.
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Affiliation(s)
- Siao-Han Huang
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, 15260, USA.
| | - Shigeru Amemiya
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, 15260, USA.
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2
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Poderyte M, Ramanavicius A, Valiūnienė A. Exploring the Living Cell: Applications and Advances of Scanning Electrochemical Microscopy. Crit Rev Anal Chem 2024:1-12. [PMID: 38557222 DOI: 10.1080/10408347.2024.2328135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
A living cell is a complex network of molecular, biochemical and physiological processes. Cellular activities, such as ion transport, metabolic processes, and cell-cell interactions can be determined electrochemically by detecting the electrons or ions exchanged in these processes. Electrochemical methods often are noninvasive, and they can enable the real-time monitoring of cellular processes. Scanning electrochemical microscopy (SECM) is an advanced scanning probe electroanalysis technique that can map the surface topography and local reactivity of a substrate with high precision at the micro- or nanoscale. By measuring electrochemical signals, such as redox reactions, ion fluxes, and pH changes, SECM can provide valuable insights into cellular activity. As a result of its compatibility with liquid medium measurements and its nondestructive nature, SECM has gained popularity in living cell research. This review aims to furnish an overview of SECM, elucidating its principles, applications, and its potential to contribute significantly to advancements in cell biology, electroporation, and biosensors. As a multidisciplinary tool, SECM is distinguished by its ability to unravel the intricacies of living cells and offers promising avenues for breakthroughs in our understanding of cellular complexity.
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Affiliation(s)
- Margarita Poderyte
- Faculty of Chemistry and Geosciences, Institute of Chemistry, Vilnius University, Vilnius, Lithuania
| | - Arunas Ramanavicius
- Faculty of Chemistry and Geosciences, Institute of Chemistry, Vilnius University, Vilnius, Lithuania
- Laboratory of Nanotechnology, State Research Institute Centre of Physical Sciences and Technology, Vilnius, Lithuania
| | - Aušra Valiūnienė
- Faculty of Chemistry and Geosciences, Institute of Chemistry, Vilnius University, Vilnius, Lithuania
- State Research Institute Center for Physical Sciences and Technology, Vilnius, Lithuania
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3
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Zhao Y, Ye Z, Liu Y, Zhang J, Kuermanbayi S, Zhou Y, Guo H, Xu F, Li F. Investigating the Role of Extracellular Matrix Stiffness in Modulating the Ferroptosis Process in Hepatocellular Carcinoma Cells via Scanning Electrochemical Microscopy. Anal Chem 2024; 96:1102-1111. [PMID: 38179931 DOI: 10.1021/acs.analchem.3c03771] [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: 01/06/2024]
Abstract
Extracellular matrix (ECM) stiffness modulates a variety of cellular processes, including ferroptosis, a process with significant potential implications for hepatocellular carcinoma (HCC) fibrosis and cirrhosis. However, the exact relationship between ECM stiffness and HCC ferroptosis is yet unclarified, partially due to the lack of in situ information on key parameters of the ferroptosis process of living HCC cells. This study pioneers the use of in vitro mechanical microenvironment models of HCC and the scanning electrochemical microscopy (SECM) technique for understanding this interplay. We first cultured HuH7 cells on 4.0, 18.0, and 44.0 kPa polyacrylamide (PA) gels to simulate early, intermediate, and advanced HCC ECM stiffness, respectively. Then, we used SECM to in situ monitor changes in cell membrane permeability, respiratory activity, and reactive oxygen species (ROS) levels of erastin-induced HuH7 cells on PA gels, finding that increasing ECM stiffness potentiates ferroptosis, including increased membrane permeabilization and H2O2 release as well as reduced respiratory activity. Through further transcriptome sequencing and molecular biology measurements, we identified a critical role for focal adhesion kinase (FAK)-mediated yes-associated protein (YAP) in regulating the ferroptosis process dependent on ECM stiffness, which provides novel insights into the mechanical regulation of ferroptosis in HCC cells and may pave the way for innovative therapeutic strategies.
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Affiliation(s)
- Yuxiang Zhao
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, P. R. China
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - Zhaoyang Ye
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, P. R. China
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - Yulin Liu
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, P. R. China
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - Junjie Zhang
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, P. R. China
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - Shuake Kuermanbayi
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, P. R. China
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - Yan Zhou
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, P. R. China
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - Hui Guo
- Department of Medical Oncology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, P. R. China
| | - Feng Xu
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, P. R. China
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - Fei Li
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, P. R. China
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an 710049, P. R. China
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4
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Thind S, Lima D, Booy E, Trinh D, McKenna SA, Kuss S. Cytochrome c oxidase deficiency detection in human fibroblasts using scanning electrochemical microscopy. Proc Natl Acad Sci U S A 2024; 121:e2310288120. [PMID: 38154062 PMCID: PMC10769844 DOI: 10.1073/pnas.2310288120] [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: 06/20/2023] [Accepted: 11/17/2023] [Indexed: 12/30/2023] Open
Abstract
Cytochrome c oxidase deficiency (COXD) is an inherited disorder characterized by the absence or mutation in the genes encoding for the cytochrome c oxidase protein (COX). COX deficiency results in severe muscle weakness, heart, liver, and kidney disorders, as well as brain damage in infants and adolescents, leading to death in many cases. With no cure for this disorder, finding an efficient, inexpensive, and early means of diagnosis is essential to minimize symptoms and long-term disabilities. Furthermore, muscle biopsy, the traditional detection method, is invasive, expensive, and time-consuming. This study demonstrates the applicability of scanning electrochemical microscopy to quantify COX activity in living human fibroblast cells. Taking advantage of the interaction between the redox mediator N, N, N', N'-tetramethyl-para-phenylene-diamine, and COX, the enzymatic activity was successfully quantified by monitoring current changes using a platinum microelectrode and determining the apparent heterogeneous rate constant k0 using numerical modeling. This study provides a foundation for developing a diagnostic method for detecting COXD in infants, which has the potential to increase treatment effectiveness and improve the quality of life of affected individuals.
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Affiliation(s)
- Shubhneet Thind
- Laboratory for Bioanalytics and Electrochemical Sensing, Department of Chemistry, University of Manitoba, Winnipeg, MBR3T 2N2, Canada
| | - Dhésmon Lima
- Laboratory for Bioanalytics and Electrochemical Sensing, Department of Chemistry, University of Manitoba, Winnipeg, MBR3T 2N2, Canada
| | - Evan Booy
- Department of Chemistry, University of Manitoba, Winnipeg, MBR3T 2N2, Canada
| | - Dao Trinh
- Laboratoire des Sciences de l’Ingénieur Pour l’Environnement, UMR CNRS 7356, Université de La Rochelle, Pôle Sciences et Technologie17042, La Rochelle, Cedex 1, France
| | - Sean A. McKenna
- Department of Chemistry, University of Manitoba, Winnipeg, MBR3T 2N2, Canada
| | - Sabine Kuss
- Laboratory for Bioanalytics and Electrochemical Sensing, Department of Chemistry, University of Manitoba, Winnipeg, MBR3T 2N2, Canada
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5
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Zhang H, Jiang H, Liu X, Wang X. A review of innovative electrochemical strategies for bioactive molecule detection and cell imaging: Current advances and challenges. Anal Chim Acta 2024; 1285:341920. [PMID: 38057043 DOI: 10.1016/j.aca.2023.341920] [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: 09/12/2023] [Revised: 10/13/2023] [Accepted: 10/14/2023] [Indexed: 12/08/2023]
Abstract
Cellular heterogeneity poses a major challenge for tumor theranostics, requiring high-resolution intercellular bioanalysis strategies. Over the past decades, the advantages of electrochemical analysis, such as high sensitivity, good spatio-temporal resolution, and ease of use, have made it the preferred method to uncover cellular differences. To inspire more creative research, herein, we highlight seminal works in electrochemical techniques for biomolecule analysis and bioimaging. Specifically, micro/nano-electrode-based electrochemical techniques enable real-time quantitative analysis of electroactive substances relevant to life processes in the micro-nanostructure of cells and tissues. Nanopore-based technique plays a vital role in biosensing by utilizing nanoscale pores to achieve high-precision detection and analysis of biomolecules with exceptional sensitivity and single-molecule resolution. Electrochemiluminescence (ECL) technology is utilized for real-time monitoring of the behavior and features of individual cancer cells, enabling observation of their dynamic processes due to its capability of providing high-resolution and highly sensitive bioimaging of cells. Particularly, scanning electrochemical microscopy (SECM) and scanning ion conductance microscopy (SICM) which are widely used in real-time observation of cell surface biological processes and three-dimensional imaging of micro-nano structures, such as metabolic activity, ion channel activity, and cell morphology are introduced in this review. Furthermore, the expansion of the scope of cellular electrochemistry research by innovative functionalized electrodes and electrochemical imaging models and strategies to address future challenges and potential applications is also discussed in this review.
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Affiliation(s)
- Hao Zhang
- State Key Laboratory of Digital Medical Engineering, School of Biological Science and Medical Engineering, Southeast University, Nanjing, Jiangsu 210096, China
| | - Hui Jiang
- State Key Laboratory of Digital Medical Engineering, School of Biological Science and Medical Engineering, Southeast University, Nanjing, Jiangsu 210096, China
| | - Xiaohui Liu
- State Key Laboratory of Digital Medical Engineering, School of Biological Science and Medical Engineering, Southeast University, Nanjing, Jiangsu 210096, China.
| | - Xuemei Wang
- State Key Laboratory of Digital Medical Engineering, School of Biological Science and Medical Engineering, Southeast University, Nanjing, Jiangsu 210096, China.
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6
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Liu Y, Zhang J, Li Y, Zhao Y, Kuermanbayi S, Zhuang J, Zhang H, Xu F, Li F. Matrix stiffness-dependent microglia activation in response to inflammatory cues: in situ investigation by scanning electrochemical microscopy. Chem Sci 2023; 15:171-184. [PMID: 38131065 PMCID: PMC10732011 DOI: 10.1039/d3sc03504b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Accepted: 11/26/2023] [Indexed: 12/23/2023] Open
Abstract
Microglia play a crucial role in maintaining the homeostasis of the central nervous system (CNS) by sensing and responding to mechanical and inflammatory cues in their microenvironment. However, the interplay between mechanical and inflammatory cues in regulating microglia activation remains elusive. In this work, we constructed in vitro mechanical-inflammatory coupled microenvironment models of microglia by culturing BV2 cells (a murine microglial cell line) on polyacrylamide gels with tunable stiffness and incorporating a lipopolysaccharide (LPS) to mimic the physiological and pathological microenvironment of microglia in the hippocampus. Through characterization of activation-related proteins, cytokines, and reactive oxygen species (ROS) levels, we observed that the LPS treatment induced microglia on a stiff matrix to exhibit overexpression of NOX2, higher levels of ROS and inflammatory factors compared to those on a soft matrix. Additionally, using scanning electrochemical microscopy (SECM), we performed in situ characterization and discovered that microglia on a stiff matrix promoted extracellular ROS production, leading to a disruption in their redox balance and increased susceptibility to LPS-induced ROS production. Furthermore, the respiratory activity and migration behavior of microglia were closely associated with their activation process, with the stiff matrix-LPS-induced microglia demonstrating the most pronounced changes in respiratory activity and migration ability. This work represents the first in situ and dynamic monitoring of microglia activation state alterations under a mechanical-inflammatory coupled microenvironment using SECM. Our findings shed light on matrix stiffness-dependent activation of microglia in response to an inflammatory microenvironment, providing valuable insights into the mechanisms underlying neuroinflammatory processes in the CNS.
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Affiliation(s)
- Yulin Liu
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University Xi'an 710049 P. R. China
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University Xi'an 710049 P. R. China
| | - Junjie Zhang
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University Xi'an 710049 P. R. China
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University Xi'an 710049 P. R. China
| | - Yabei Li
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University Xi'an 710049 P. R. China
- School of Chemistry, Xi'an Jiaotong University Xi'an 710049 P. R. China
| | - Yuxiang Zhao
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University Xi'an 710049 P. R. China
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University Xi'an 710049 P. R. China
| | - Shuake Kuermanbayi
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University Xi'an 710049 P. R. China
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University Xi'an 710049 P. R. China
| | - Jian Zhuang
- Key Laboratory of Education Ministry for Modern Design Rotor-Bearing System, School of Mechanical Engineering, Xi'an Jiaotong University Xi'an 710049 P. R. China
| | - Hua Zhang
- Department of Neurosurgery, The First Affiliated Hospital, Xi'an Jiaotong University Xi'an 710061 P. R. China
| | - Feng Xu
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University Xi'an 710049 P. R. China
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University Xi'an 710049 P. R. China
| | - Fei Li
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University Xi'an 710049 P. R. China
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University Xi'an 710049 P. R. China
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7
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Thomas N, Lima D, Trinh D, Kuss S. Temperature Effect on the Electrochemical Current Response during Scanning Electrochemical Microscopy of Living Cells. Anal Chem 2023; 95:17962-17967. [PMID: 38029336 PMCID: PMC10720632 DOI: 10.1021/acs.analchem.3c03716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 11/17/2023] [Accepted: 11/23/2023] [Indexed: 12/01/2023]
Abstract
Scanning electrochemical microscopy (SECM) is being used increasingly to monitor electrochemical processes at the interface of living cells and electrodes. This allows the detection and quantification of biomarkers that further the understanding of various diseases. Rapid SECM experiments are often carried out without monitoring the analyte solution temperature or are performed at room temperature. The reported research demonstrates that temperature control is crucial during SECM imaging of living cells to obtain reliable data. In this study, a SECM-integrated thermostatic ring on the sample stage enabled imaging of living biological cells in a constant height mode at various temperatures. Two-dimensional line scans were conducted while scanning single Adenocarcinoma Cervical cancer (HeLa) cells. Numerical modeling was carried out to evaluate the effect of the temperature on the electrochemical current response of living cells to compare the apparent heterogeneous rate constant (k0), representing cellular reaction kinetics. This study reveals that even slight temperature variations of approximately 2 °C affect the reaction kinetics of single living cells, altering the measured current during SECM.
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Affiliation(s)
- Nikita Thomas
- Chemistry
Department, University of Manitoba, Winnipeg, MB, Canada R3T 2N2
| | - Dhésmon Lima
- Chemistry
Department, University of Manitoba, Winnipeg, MB, Canada R3T 2N2
| | - Dao Trinh
- Laboratoire
des Sciences de l’ Ingenieur Pour l’Environment UMR-7536
CNRS, Université de la Rochelle, Avenue Michel Crépeau, 17042 La Rochelle, France
| | - Sabine Kuss
- Chemistry
Department, University of Manitoba, Winnipeg, MB, Canada R3T 2N2
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8
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Cremin K, Meloni GN, Valavanis D, Soyer OS, Unwin PR. Can Single Cell Respiration be Measured by Scanning Electrochemical Microscopy (SECM)? ACS MEASUREMENT SCIENCE AU 2023; 3:361-370. [PMID: 37868362 PMCID: PMC10588932 DOI: 10.1021/acsmeasuresciau.3c00019] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 06/13/2023] [Accepted: 06/13/2023] [Indexed: 10/24/2023]
Abstract
Ultramicroelectrode (UME), or, equivalently, microelectrode, probes are increasingly used for single-cell measurements of cellular properties and processes, including physiological activity, such as metabolic fluxes and respiration rates. Major challenges for the sensitivity of such measurements include: (i) the relative magnitude of cellular and UME fluxes (manifested in the current); and (ii) issues around the stability of the UME response over time. To explore the extent to which these factors impact the precision of electrochemical cellular measurements, we undertake a systematic analysis of measurement conditions and experimental parameters for determining single cell respiration rates via the oxygen consumption rate (OCR) in single HeLa cells. Using scanning electrochemical microscopy (SECM), with a platinum UME as the probe, we employ a self-referencing measurement protocol, rarely employed in SECM, whereby the UME is repeatedly approached from bulk solution to a cell, and a short pulse to oxygen reduction reaction (ORR) potential is performed near the cell and in bulk solution. This approach enables the periodic tracking of the bulk UME response to which the near-cell response is repeatedly compared (referenced) and also ensures that the ORR near the cell is performed only briefly, minimizing the effect of the electrochemical process on the cell. SECM experiments are combined with a finite element method (FEM) modeling framework to simulate oxygen diffusion and the UME response. Taking a realistic range of single cell OCR to be 1 × 10-18 to 1 × 10-16 mol s-1, results from the combination of FEM simulations and self-referencing SECM measurements show that these OCR values are at, or below, the present detection sensitivity of the technique. We provide a set of model-based suggestions for improving these measurements in the future but highlight that extraordinary improvements in the stability and precision of SECM measurements will be required if single cell OCR measurements are to be realized.
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Affiliation(s)
- Kelsey Cremin
- Bio-Electrical
Engineering Innovation Hub, Department of Chemistry, Molecular Analytical
Science Centre for Doctoral Training (MAS CDT), School of Life Sciences, the University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Gabriel N. Meloni
- Bio-Electrical
Engineering Innovation Hub, Department of Chemistry, Molecular Analytical
Science Centre for Doctoral Training (MAS CDT), School of Life Sciences, the University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Dimitrios Valavanis
- Bio-Electrical
Engineering Innovation Hub, Department of Chemistry, Molecular Analytical
Science Centre for Doctoral Training (MAS CDT), School of Life Sciences, the University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Orkun S. Soyer
- Bio-Electrical
Engineering Innovation Hub, Department of Chemistry, Molecular Analytical
Science Centre for Doctoral Training (MAS CDT), School of Life Sciences, the University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Patrick R. Unwin
- Bio-Electrical
Engineering Innovation Hub, Department of Chemistry, Molecular Analytical
Science Centre for Doctoral Training (MAS CDT), School of Life Sciences, the University of Warwick, Coventry CV4 7AL, United Kingdom
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9
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Jin R, Zhou W, Xu Y, Jiang D, Fang D. Electrochemical Visualization of Membrane Proteins in Single Cells at a Nanoscale Using Scanning Electrochemical Cell Microscopy. Anal Chem 2023. [PMID: 37358933 DOI: 10.1021/acs.analchem.3c00114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/28/2023]
Abstract
The electrochemical visualization of proteins in the plasma membrane of single fixed cells was achieved with a spatial resolution of 160 nm using scanning electrochemical cell microscopy. The model protein, the carcinoembryonic antigen (CEA), is linked with a ruthenium complex (Ru(bpy)32+)-tagged antibody, which exhibits redox peaks in its cyclic voltammetry curves after a nanopipette tip contacts the cellular membrane. Based on the potential-resolved oxidation or reduction currents, an uneven distribution of membrane CEAs on the cells is electrochemically visualized, which could only be achieved previously using super-resolution optical microscopy. Compared with current electrochemical microscopy, the single-cell scanning electrochemical cell microscopy (SECCM) strategy not only improves the spatial resolution but also utilizes the potential-resolved current from the antibody-antigen complex to increase electrochemical imaging accuracy. Eventually, the electrochemical visualization of cellular proteins at the nanoscale enables the super-resolution study of cells to provide more biological information.
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Affiliation(s)
- Rong Jin
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu 211126, China
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Wenting Zhou
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu 211126, China
| | - Yanyan Xu
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu 211126, China
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Dechen Jiang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Danjun Fang
- School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu 211126, China
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10
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Zhao X, Zhu R, Anikovskiy M, Wu Q, Ding Z. Profiling H 2O 2 from single COS-7 cells by means of scanning electrochemical microscopy. Biosens Bioelectron 2023; 227:115123. [PMID: 36812793 DOI: 10.1016/j.bios.2023.115123] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 01/22/2023] [Accepted: 02/02/2023] [Indexed: 02/09/2023]
Abstract
We report quantitative determination of extracellular H2O2 released from single COS-7 cells with high spatial resolution, using scanning electrochemical microscopy (SECM). Our strategy of depth scan imaging in vertical x-z plane was conveniently utilized to a single cell for obtaining probe approach curves (PACs) to any positions on the membrane of a live cell by simply drawing a vertical line on one depth SECM image. This SECM mode provides an efficient way to record a batch of PACs, and visualize cell topography simultaneously. The H2O2 concentration at the membrane surface in the center of an intact COS-7 cell was deconvoluted from apparent O2, and determined to be 0.020 mM by overlapping the experimental PAC with the simulated one having a known H2O2 release value. The H2O2 profile determined in this way gives insight into physiological activity of single live cells. In addition, intracellular H2O2 profile was demonstrated using confocal microscopy by labelling the cells with a luminomphore, 2',7'-dichlorodihydrofluorescein diacetate. The two methodologies have illustrated complementary experimental results of H2O2 detection, indicating that H2O2 generation is centered at endoplasmic reticula.
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Affiliation(s)
- Xiaocui Zhao
- Department of Chemistry, The University of Western Ontario, Chemistry Building, 1151 Richmond Street, London, Ontario, N6A 5B7, Canada
| | - Renkang Zhu
- Department of Chemistry, The University of Western Ontario, Chemistry Building, 1151 Richmond Street, London, Ontario, N6A 5B7, Canada
| | - Max Anikovskiy
- Department of Chemistry, University of Calgary, Calgary, AB, T2N 1N4, Canada
| | - Qingxi Wu
- School of Life Sciences, Anhui University, Hefei, 230601, Anhui, China
| | - Zhifeng Ding
- Department of Chemistry, The University of Western Ontario, Chemistry Building, 1151 Richmond Street, London, Ontario, N6A 5B7, Canada.
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11
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Cremin K, Duxbury SJN, Rosko J, Soyer OS. Formation and emergent dynamics of spatially organized microbial systems. Interface Focus 2023; 13:20220062. [PMID: 36789239 PMCID: PMC9912014 DOI: 10.1098/rsfs.2022.0062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 12/19/2022] [Indexed: 02/12/2023] Open
Abstract
Spatial organization is the norm rather than the exception in the microbial world. While the study of microbial physiology has been dominated by studies in well-mixed cultures, there is now increasing interest in understanding the role of spatial organization in microbial physiology, coexistence and evolution. Where studied, spatial organization has been shown to influence all three of these aspects. In this mini review and perspective article, we emphasize that the dynamics within spatially organized microbial systems (SOMS) are governed by feedbacks between local physico-chemical conditions, cell physiology and movement, and evolution. These feedbacks can give rise to emergent dynamics, which need to be studied through a combination of spatio-temporal measurements and mathematical models. We highlight the initial formation of SOMS and their emergent dynamics as two open areas of investigation for future studies. These studies will benefit from the development of model systems that can mimic natural ones in terms of species composition and spatial structure.
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Affiliation(s)
- Kelsey Cremin
- School of Life Sciences, University of Warwick, Coventry CV4 7AL, UK
| | | | - Jerko Rosko
- School of Life Sciences, University of Warwick, Coventry CV4 7AL, UK
| | - Orkun S. Soyer
- School of Life Sciences, University of Warwick, Coventry CV4 7AL, UK
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12
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Wu J, Gao Y, Pan N, Lu L, Wang X. An isolated single-particle-based SECM tip interface for single-cell NO sensing. Biosens Bioelectron 2023; 223:115048. [PMID: 36587444 DOI: 10.1016/j.bios.2022.115048] [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: 09/15/2022] [Revised: 12/10/2022] [Accepted: 12/25/2022] [Indexed: 12/27/2022]
Abstract
As a key factor in cellular metabolic processes, nitric oxide (NO) is a challenging target for in situ real-time monitoring due to its transient property and short diffusion distance. Scanning electrochemical microscopy (SECM) has unique advantages in single-cell analysis, which can obtain the electrochemical current by scanning the cell surface with a tip microelectrode. In particular, it can further improved the electrochemical response by enhancing the interface properties of its tip. Here, an interface design strategy based on platinum single nanoparticle (Pt NP) was developed, and fluorinated self-assembled monolayers (SAMs) were used to further improve its performance. This modified tip was used as an SECM probe for NO concentration monitoring and morphological imaging of single MCF-7 cells. It has the high sensitivity (164.7 μA/μM·cm2) and good selectivity for NO detection, which benefits from the efficient catalytic properties of Pt NPs and high mass transport and hydrophobic antifouling properties of the interface. Notably, it shows a superior performance in detecting the fluctuation of NO released by a single MCF-7-cell under the stimulation of cadmium (Cd), which demonstrates a promising method for using a single-particle-based tip in SECM applications.
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Affiliation(s)
- Jiening Wu
- Key Laboratory of Beijing on Regional Air Pollution Control, Department of Environmental Science, Beijing University of Technology, Beijing, 100124, PR China
| | - Yafang Gao
- Key Laboratory of Beijing on Regional Air Pollution Control, Department of Environmental Science, Beijing University of Technology, Beijing, 100124, PR China
| | - Na Pan
- Key Laboratory of Beijing on Regional Air Pollution Control, Department of Environmental Science, Beijing University of Technology, Beijing, 100124, PR China
| | - Liping Lu
- Key Laboratory of Beijing on Regional Air Pollution Control, Department of Environmental Science, Beijing University of Technology, Beijing, 100124, PR China; Center of Excellence for Environmental Safety and Biological Effects, Department of Chemistry and Biology, Beijing University of Technology, Beijing, 100124, PR China.
| | - Xiayan Wang
- Center of Excellence for Environmental Safety and Biological Effects, Department of Chemistry and Biology, Beijing University of Technology, Beijing, 100124, PR China
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13
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Goines S, Dick JE. Investigating the cytotoxic redox mechanism of PFOS within Hep G2 by hyperspectral-assisted scanning electrochemical microscopy. Analyst 2022; 147:4356-4364. [PMID: 36043461 PMCID: PMC10308698 DOI: 10.1039/d2an00904h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/29/2023]
Abstract
Perfluorooctane sulfonate (PFOS) is one of the most lethal per- and poly-fluoroalkyl substances (PFAS). Generally, exposure effects are studied through case-controlled studies, cohort studies, or cell assays. Unfortunately, most studies involving two-dimensional cell cultures require cell lysis or fixation. For in vitro studies, fluorescence microscopy has been useful, but methods to simultaneously discern phototoxic effects during an experiment are limited. Here, we use hepatocarcinoma (Hep G2) cells to examine the redox mechanism of PFOS cytotoxicity in vitro, while using hyperspectral-assisted scanning electrochemical microscopy (SECM) to differentiate between PFOS and redox mediator induced stress. Specifically, we correlate an increase in the electrochemical response of ferrocenemethanol oxidation with an increase in intracellular reactive oxygen species. Corresponding hyperspectral images of redox indicative-fluorophores implicate superoxide in the cytotoxic redox mechanism.
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Affiliation(s)
- Sondrica Goines
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Jeffrey E Dick
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
- Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
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14
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Pan N, Lu L, Zhang D, Wang X. Evaluation of the effect of nitrate and chloride on Cd(II)-induced cell oxidative stress by scanning electrochemical microscopy. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:2673-2681. [PMID: 35762516 DOI: 10.1039/d2ay00495j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Cadmium (Cd) is one of the most prevalent toxic metal pollutants, which is widely distributed in various environmental media and organisms. Literature studies have documented that Cd could stimulate cellular oxidative stress, and the increased intracellular reactive oxygen species (ROS) might destroy certain proteins and DNA and subsequently lead to cell apoptosis. Although several studies have studied the co-exposure between cadmium and other metals, information on the potential effects of Cd and its counterions is still lacking. In the present study, we explored the effects of nitrate and chloride on oxidative stress induced by Cd(II) at environmental exposure levels in human breast cancer cells (MCF-7) using scanning electrochemical microscopy (SECM). After incubation in CdCl2 or Cd(NO3)2, ROS production is concentration-dependent and time-dependent, and the variation trend is consistent. When MCF-7 cells were incubated at a constant Cd2+ concentration, it was found that the higher the concentration ratio of Cd(NO3)2/CdCl2, the less ROS was generated. Combined with cell-viability, intracellular acidification as well as antioxidants system tests, we observed that nitrate could be reduced to nitrite and then inhibit Cd-induced oxidative stress. Benefitting from real-time in situ imaging of cells by SECM, H2O2 was detected and quantified in a noninvasive way, and the effect of Cd at environmental exposure levels on cellular oxidative stress was explored deeper and more comprehensively. Prospectively, cytotoxicological methods based on the SECM technique would be established to explore toxic pollutant co-exposure issues at environmental exposure levels.
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Affiliation(s)
- Na Pan
- Key Laboratory of Beijing on Regional Air Pollution Control, Department of Environmental Science, Beijing University of Technology, Beijing 100124, P. R. China
| | - Liping Lu
- Key Laboratory of Beijing on Regional Air Pollution Control, Department of Environmental Science, Beijing University of Technology, Beijing 100124, P. R. China
- Center of Excellence for Environmental Safety and Biological Effects, Department of Chemistry and Biology, Beijing University of Technology, Beijing 100124, P. R. China.
| | - Dongtang Zhang
- Center of Excellence for Environmental Safety and Biological Effects, Department of Chemistry and Biology, Beijing University of Technology, Beijing 100124, P. R. China.
| | - Xiayan Wang
- Center of Excellence for Environmental Safety and Biological Effects, Department of Chemistry and Biology, Beijing University of Technology, Beijing 100124, P. R. China.
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15
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Goines S, Deng M, Glasscott MW, Leung JWC, Dick JE. Enhancing scanning electrochemical microscopy's potential to probe dynamic co-culture systems via hyperspectral assisted-imaging. Analyst 2022; 147:2396-2404. [PMID: 35579029 PMCID: PMC9287841 DOI: 10.1039/d2an00319h] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/29/2023]
Abstract
Precise determination of boundaries in co-culture systems is difficult to achieve with scanning electrochemical microscopy alone. Thus, biological scanning electrochemical microscope platforms generally consist of a scanning electrochemical microscope positioner mounted on the stage of an inverted microscope for correlated electrochemical and optical imaging. Use of a fluorescence microscope allows for site-specific fluorescence labeling to obtain more clearly resolved spatial and electrochemical data. Here, we construct a unique hyperspectral assisted-biological scanning electrochemical microscope platform to widen the scope of biological imaging. Specifically, we incorporate a variable fluorescence bandpass source into a biological scanning electrochemical microscope platform for simultaneous optical, spectral, and electrochemical imaging. Not only does this platform serve as a cost-effective alternative to white light laser imaging, but additionally it provides multi-functional analysis of biological samples. Here, we demonstrate the efficacy of our platform to discern the electrochemical contribution of site-specific cells by optically and spectroscopically resolving boundaries as well as cell types within a complex biological system.
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Affiliation(s)
- Sondrica Goines
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
| | - Mingchu Deng
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
| | - Matthew W Glasscott
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
| | - Justin W C Leung
- Department of Radiation Oncology, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Jeffrey E Dick
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
- Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
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16
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Li N, Chen J, Huang X, Guo H, Li X, Fan A, Shao H. Competition of ion-pair during the transition from hydrogen bonding to electrostatic interaction on self-assembled monolayer. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.139310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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17
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Gwon HJ, Lim D, Ahn HS. Bioanalytical chemistry with scanning electrochemical microscopy. B KOREAN CHEM SOC 2021. [DOI: 10.1002/bkcs.12383] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Hyo Jin Gwon
- Department of Chemistry Institution: Yonsei University Seoul South Korea
| | - Donghoon Lim
- Department of Chemistry Institution: Yonsei University Seoul South Korea
| | - Hyun S. Ahn
- Department of Chemistry Institution: Yonsei University Seoul South Korea
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18
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Wallace GQ, Delignat-Lavaud B, Zhao X, Trudeau LÉ, Masson JF. A blueprint for performing SERS measurements in tissue with plasmonic nanofibers. J Chem Phys 2020; 153:124702. [PMID: 33003723 DOI: 10.1063/5.0024467] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Plasmonic nanostructures have found increasing utility due to the increased popularity that surface-enhanced Raman scattering (SERS) has achieved in recent years. SERS has been incorporated into an ever-growing list of applications, with bioanalytical and physiological analyses having emerged as two of the most popular. Thus far, the transition from SERS studies of cultured cells to SERS studies involving tissue has been gradual and limited. In most cases, SERS measurements in more intact tissue have involved nanoparticles distributed throughout the tissue or localized to specific regions via external functionalization. Performing highly localized measurements without the need for global nanoparticle uptake or specialized surface modifications would be advantageous to the expansion of SERS measurements in tissue. To this end, this work provides critical insight with supporting experimental evidence into performing SERS measurements with nanosensors inserted in tissues. We address two critical steps that are otherwise underappreciated when other approaches to performing SERS measurements in tissue are used. Specifically, we demonstrate two mechanical routes for controlled positioning and inserting the nanosensors into the tissue, and we discuss two means of focusing on the nanosensors both before and after they are inserted into the tissue. By examining the various combinations of these steps, we provide a blueprint for performing SERS measurements with nanosensors inserted in tissue. This blueprint could prove useful for the general development of SERS as a tool for bioanalytical and physiological studies and for more specialized techniques such as SERS-optophysiology.
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Affiliation(s)
- Gregory Q Wallace
- Département de Chimie, Centre Québécois des Matériaux Fonctionnels (CQMF), and Regroupement Québécois des Matériaux de Pointe (RQMP), Université de Montréal, C.P. 6128 Succ. Centre-Ville, Montréal, Quebec H3C 3J7, Canada
| | - Benoît Delignat-Lavaud
- Neuroscience Research Group (GRSNC), Département de Pharmacologie et Physiologie, Département de Neurosciences, Faculté de Médecine, Université de Montréal, C.P. 6128 Succ. Centre-ville, Montréal, Quebec H3C 3J7, Canada
| | - Xingjuan Zhao
- Département de Chimie, Centre Québécois des Matériaux Fonctionnels (CQMF), and Regroupement Québécois des Matériaux de Pointe (RQMP), Université de Montréal, C.P. 6128 Succ. Centre-Ville, Montréal, Quebec H3C 3J7, Canada
| | - Louis-Éric Trudeau
- Neuroscience Research Group (GRSNC), Département de Pharmacologie et Physiologie, Département de Neurosciences, Faculté de Médecine, Université de Montréal, C.P. 6128 Succ. Centre-ville, Montréal, Quebec H3C 3J7, Canada
| | - Jean-François Masson
- Département de Chimie, Centre Québécois des Matériaux Fonctionnels (CQMF), and Regroupement Québécois des Matériaux de Pointe (RQMP), Université de Montréal, C.P. 6128 Succ. Centre-Ville, Montréal, Quebec H3C 3J7, Canada
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19
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20
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Ding H, Guo W, Zhou P, Su B. Nanocage-confined electrochemiluminescence for the detection of dopamine released from living cells. Chem Commun (Camb) 2020; 56:8249-8252. [PMID: 32558869 DOI: 10.1039/d0cc03370g] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Herein we report an electrochemiluminescent nanocage array (ENA) in which luminophores are physically confined. The ENA can function as a solid sensor for the detection of dopamine released from living cells on the basis of its quenching effect on the ECL signal.
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Affiliation(s)
- Hao Ding
- Institute of Analytical Chemistry, Department of Chemistry, Zhejiang University, Hangzhou 310058, China.
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21
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Jiao Y, Zhuang J, Zheng Q, Liao X. A High Accuracy Ion Conductance Imaging Method Based on the Approach Curve Spectrum. Ultramicroscopy 2020; 215:113025. [PMID: 32485394 DOI: 10.1016/j.ultramic.2020.113025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 04/28/2020] [Accepted: 05/16/2020] [Indexed: 01/13/2023]
Abstract
Scanning ion conductance microscopy (SICM), as an emerging non-contact in situ topography measurement tool with nano resolution, has been increasingly used in recent years in biomedicine, electrochemistry and materials science. In the conventional measurement method of SICM, the sample topography is constructed according to the position of the probe at the feedback threshold of the ion current. Nevertheless, for different structures, a constant threshold cannot maintain a constant probe-sample distance. This phenomenon makes the measurement topography inconsistent with the real sample surface. In order to solve this problem and improve the measurement accuracy of SICM, a new ion conductance imaging method based on the approach curve spectrum is proposed in this work. In the new method, the local feature around the measurement point is firstly evaluated according to the change rate of ion current. Secondly, based on the local feature, the corresponding approach curve is searched from the prior approach curve spectrum to accurately evaluate the distance between the probe and the sample. Finally, the sample topography is constructed by the probe position subtracting the probe-sample distance. In this paper, we verify the feasibility of the new imaging method by combining finite element theory and experiments. To examine the measurement accuracy, the standard strip silicon and cylindrical polydimethylsiloxane (PDMS) samples are tested, and the improved imaging method can obtain the topography closer to the real samples and reduce the volumetric measurement error by 5.4%. The implementation of the new imaging method will further promote SICM application in related research fields.
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Affiliation(s)
- Yangbohan Jiao
- Key Laboratory of Education Ministry for Modern Design Rotor-Bearing System, Xi'an Jiaotong University, Xi'an 710049, China; School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Jian Zhuang
- Key Laboratory of Education Ministry for Modern Design Rotor-Bearing System, Xi'an Jiaotong University, Xi'an 710049, China; School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
| | - Qiangqiang Zheng
- Key Laboratory of Education Ministry for Modern Design Rotor-Bearing System, Xi'an Jiaotong University, Xi'an 710049, China; School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Xiaobo Liao
- Key Laboratory of Education Ministry for Modern Design Rotor-Bearing System, Xi'an Jiaotong University, Xi'an 710049, China; School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China; School of Manufacturing Science and Engineering, Key Laboratory of Testing Technology for Manufacturing Process, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, China
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22
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Affiliation(s)
- Si-Min Lu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
| | - Yue-Yi Peng
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
| | - Yi-Lun Ying
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
| | - Yi-Tao Long
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
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23
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Tang Y, Yang XK, Zhang XW, Wu WT, Zhang FL, Jiang H, Liu YL, Amatore C, Huang WH. Harpagide, a natural product, promotes synaptic vesicle release as measured by nanoelectrode amperometry. Chem Sci 2019; 11:778-785. [PMID: 34123052 PMCID: PMC8146302 DOI: 10.1039/c9sc05538j] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Parkinson's disease (PD) is a neurodegenerative disorder characterized by progressive loss of dopaminergic (DAergic) neurons and low level of dopamine (DA) in the midbrain. Recent studies suggested that some natural products can protect neurons against injury, but their role on neurotransmitter release and the underlying mechanisms remained unknown. In this work, nanoelectrode electrochemistry was used for the first time to quantify DA release inside single DAergic synapses. Our results unambiguously demonstrated that harpagide, a natural product, effectively enhances synaptic DA release and restores DA release at normal levels from injured neurons in PD model. These important protective and curative effects are shown to result from the fact that harpagide efficiently inhibits the phosphorylation and aggregation of α-synuclein by alleviating the intracellular reactive oxygen level, being beneficial for vesicle loading and recycling. This establishes that harpagide offers promising avenues for preventive or therapeutic interventions against PD and other neurodegenerative disorders. Nanoelectrode amperometry was used to monitor DA release inside single DAergic synapses, and demonstrated that harpagide effectively enhances synaptic DA release by reducing intracellular ROS generation and inhibiting α-Syn phosphorylation.![]()
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Affiliation(s)
- Yun Tang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University Wuhan 430072 China
| | - Xiao-Ke Yang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University Wuhan 430072 China
| | - Xin-Wei Zhang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University Wuhan 430072 China
| | - Wen-Tao Wu
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University Wuhan 430072 China
| | - Fu-Li Zhang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University Wuhan 430072 China
| | - Hong Jiang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University Wuhan 430072 China
| | - Yan-Ling Liu
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University Wuhan 430072 China
| | - Christian Amatore
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University Xiamen 361005 China .,PASTEUR, Departement de Chimie, Pcole Normale Superieure, PSL Research University, Sorbonne Universites, UPMC Univ. Paris 06, CNRS 24 rue Lhomond 75005 Paris France
| | - Wei-Hua Huang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University Wuhan 430072 China
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Darvishi S, Pick H, Lin TE, Zhu Y, Li X, Ho PC, Girault HH, Lesch A. Tape-Stripping Electrochemical Detection of Melanoma. Anal Chem 2019; 91:12900-12908. [DOI: 10.1021/acs.analchem.9b02819] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Sorour Darvishi
- Laboratory of Physical and Analytical Electrochemistry, École Polytechnique Fédérale de Lausanne (EPFL), Valais Wallis, Rue de l’Industrie 17, CH-1950 Sion, Switzerland
| | - Horst Pick
- Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, EPFL, CH-1015 Lausanne, Switzerland
| | - Tzu-En Lin
- Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Yingdi Zhu
- Laboratory of Physical and Analytical Electrochemistry, École Polytechnique Fédérale de Lausanne (EPFL), Valais Wallis, Rue de l’Industrie 17, CH-1950 Sion, Switzerland
| | - Xiaoyun Li
- Department of Oncology, University of Lausanne, Ch. des Boveresses 155, CH-1015 Epalinges, Switzerland
- Ludwig Institute for Cancer Research, University of Lausanne, Ch. des Boveresses 155, CH-1015 Epalinges, Switzerland
| | - Ping-Chih Ho
- Department of Oncology, University of Lausanne, Ch. des Boveresses 155, CH-1015 Epalinges, Switzerland
- Ludwig Institute for Cancer Research, University of Lausanne, Ch. des Boveresses 155, CH-1015 Epalinges, Switzerland
| | - Hubert H. Girault
- Laboratory of Physical and Analytical Electrochemistry, École Polytechnique Fédérale de Lausanne (EPFL), Valais Wallis, Rue de l’Industrie 17, CH-1950 Sion, Switzerland
| | - Andreas Lesch
- Department of Industrial Chemistry “Toso Montanari”, University of Bologna, Viale del Risorgimento 4, IT-40136 Bologna, Italy
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25
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Zhao L, Shi M, Liu Y, Zheng X, Xiu J, Liu Y, Tian L, Wang H, Zhang M, Zhang X. Systematic Analysis of Different Cell Spheroids with a Microfluidic Device Using Scanning Electrochemical Microscopy and Gene Expression Profiling. Anal Chem 2019; 91:4307-4311. [PMID: 30869520 DOI: 10.1021/acs.analchem.9b00376] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The 3D cell spheroid is an emerging tool that allows better recapitulating of in vivo scenarios with multiple factors such as tissue-like morphology and membrane protein expression that intimately coordinates with enzyme activity, thus providing a psychological environment for tumorigenesis study. For analyzing different spheroids, conventional optical imaging may be hampered by the need for fluorescent labeling, which could cause toxicity side effects. As an alternative approach, scanning electrochemical microscopy (SECM) enables label-free imaging. However, SECM for cell spheroid imaging is currently suffering from incapability of systematically analyzing the cell aggregates from spheroid generation, electrochemical signal gaining, and the gene expression on different individual cell spheroids. Herein, we developed a top-removable microfluidic device for cell aggregate yielding and SECM imaging methodology to analyze heterotypic 3D cell spheroids on a single device. This technique allows not only on-chip culturing of cell aggregates but also SECM imaging of the spheroids after opening the chip and subsequent qPCR assay of corresponding clusters. Through employment of the micropit arrays (85 × 4) with a top withdrawable microfluidic layer, uniformly sized breast tumor cell and fibroblast spheroids can be simultaneously produced on a single device. By leveraging voltage-switching mode SECM at different potentials of dual mediators, we evaluated alkaline phosphatase without disturbance of substrate morphology for distinguishing the tumor aggregates from stroma. Moreover, this method also enables gene expression profiling on individual tumor or stromal spheroids. Therefore, this new strategy can seamlessly bridge SECM measurements and molecular biological analysis.
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Affiliation(s)
- Liang Zhao
- Institute of Precision Medicine and Health, Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, Beijing Key Laboratory for Bioengineering and Sensing Technology , University of Science and Technology Beijing , Beijing 100083 , China
| | - Mi Shi
- Institute of Precision Medicine and Health, Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, Beijing Key Laboratory for Bioengineering and Sensing Technology , University of Science and Technology Beijing , Beijing 100083 , China
| | - Yang Liu
- Institute of Precision Medicine and Health, Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, Beijing Key Laboratory for Bioengineering and Sensing Technology , University of Science and Technology Beijing , Beijing 100083 , China
| | - Xiaonan Zheng
- Institute of Precision Medicine and Health, Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, Beijing Key Laboratory for Bioengineering and Sensing Technology , University of Science and Technology Beijing , Beijing 100083 , China
| | - Jidong Xiu
- Institute of Precision Medicine and Health, Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, Beijing Key Laboratory for Bioengineering and Sensing Technology , University of Science and Technology Beijing , Beijing 100083 , China
| | - Yingying Liu
- Institute of Precision Medicine and Health, Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, Beijing Key Laboratory for Bioengineering and Sensing Technology , University of Science and Technology Beijing , Beijing 100083 , China
| | - Lu Tian
- Institute of Precision Medicine and Health, Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, Beijing Key Laboratory for Bioengineering and Sensing Technology , University of Science and Technology Beijing , Beijing 100083 , China
| | - Hongjuan Wang
- Institute of Precision Medicine and Health, Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, Beijing Key Laboratory for Bioengineering and Sensing Technology , University of Science and Technology Beijing , Beijing 100083 , China
| | - Meiqin Zhang
- Institute of Precision Medicine and Health, Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, Beijing Key Laboratory for Bioengineering and Sensing Technology , University of Science and Technology Beijing , Beijing 100083 , China
| | - Xueji Zhang
- Institute of Precision Medicine and Health, Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, Beijing Key Laboratory for Bioengineering and Sensing Technology , University of Science and Technology Beijing , Beijing 100083 , China
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26
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Bentley CL, Edmondson J, Meloni GN, Perry D, Shkirskiy V, Unwin PR. Nanoscale Electrochemical Mapping. Anal Chem 2018; 91:84-108. [PMID: 30500157 DOI: 10.1021/acs.analchem.8b05235] [Citation(s) in RCA: 94] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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