1
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Li L, Ding X, Shan S, Chen S, Zhang Y, Zhang C, Huang C, Duan M, Xu K, Zhang X, Wu T, Zhao Z, Liu Y, Xu Y. Reversible Fusion-Fission MXene Fiber-Based Microelectrodes for Target-Specific Gram-Positive and Gram-Negative Bacterium Discrimination. Anal Chem 2024; 96:9317-9324. [PMID: 38818541 DOI: 10.1021/acs.analchem.4c01314] [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: 06/01/2024]
Abstract
Inaccurate or cumbersome clinical pathogen diagnosis between Gram-positive bacteria (G+) and Gram-negative (G-) bacteria lead to delayed clinical therapeutic interventions. Microelectrode-based electrochemical sensors exhibit the significant advantages of rapid response and minimal sample consumption, but the loading capacity and discrimination precision are weak. Herein, we develop reversible fusion-fission MXene-based fiber microelectrodes for G+/G- bacteria analysis. During the fissuring process, the spatial utilization, loading capacity, sensitivity, and selectivity of microelectrodes were maximized, and polymyxin B and vancomycin were assembled for G+/G- identification. The surface-tension-driven reversible fusion facilitated its reusability. A deep learning model was further applied for the electrochemical impedance spectroscopy (EIS) identification in diverse ratio concentrations of G+ and G- of (1:100-100:1) with higher accuracy (>93%) and gave predictable detection results for unknown samples. Meanwhile, the as-proposed sensing platform reached higher sensitivity toward E. coli (24.3 CFU/mL) and S. aureus (37.2 CFU/mL) in 20 min. The as-proposed platform provides valuable insights for bacterium discrimination and quantification.
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Affiliation(s)
- Limin Li
- Institute of Biomedical Engineering College of Life Sciences & School of Automation, Qingdao University, Qingdao 266071, China
| | - Xiaoteng Ding
- Institute of Biomedical Engineering College of Life Sciences & School of Automation, Qingdao University, Qingdao 266071, China
| | - Shuo Shan
- The Second Affiliated Hospital of Hainan Medical University, Haikou 570311, China
| | - Shengnan Chen
- Children's Hospital Capital Institute of Pediatrics, Beijing 100020, China
| | - Yifan Zhang
- The Affiliated Hospital of Qingdao University, Qingdao 266003, China
| | - Cai Zhang
- Institute of Biomedical Engineering College of Life Sciences & School of Automation, Qingdao University, Qingdao 266071, China
| | - Chao Huang
- Institute of Biomedical Engineering College of Medicine, Southwest Jiaotong University, Chengdu 610031, Sichuan, China
| | - Meilin Duan
- Institute of Biomedical Engineering College of Life Sciences & School of Automation, Qingdao University, Qingdao 266071, China
| | - Kaikai Xu
- Institute of Biomedical Engineering College of Life Sciences & School of Automation, Qingdao University, Qingdao 266071, China
| | - Xue Zhang
- Institute of Biomedical Engineering College of Life Sciences & School of Automation, Qingdao University, Qingdao 266071, China
| | - Tianming Wu
- Institute of Biomedical Engineering College of Life Sciences & School of Automation, Qingdao University, Qingdao 266071, China
| | - Zhen Zhao
- Institute of Biomedical Engineering College of Life Sciences & School of Automation, Qingdao University, Qingdao 266071, China
| | - Yinhua Liu
- Institute of Biomedical Engineering College of Life Sciences & School of Automation, Qingdao University, Qingdao 266071, China
| | - Yuanhong Xu
- Institute of Biomedical Engineering College of Life Sciences & School of Automation, Qingdao University, Qingdao 266071, China
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2
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López L, Martínez LM, Caicedo JR, Fernández-Vega L, Cunci L. Measurement of Neuropeptide Y in Aptamer-Modified Planar Electrodes. Electrochim Acta 2024; 488:144243. [PMID: 38654828 PMCID: PMC11034791 DOI: 10.1016/j.electacta.2024.144243] [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] [Indexed: 04/26/2024]
Abstract
Electrochemical impedance spectroscopy (EIS) is a powerful technique for studying the interaction at electrode/solution interfaces. The adoption of EIS for obtaining analytical signals in biosensors based on aptamers is gaining popularity because of its advantageous characteristics for molecular recognition. Neuropeptide Y (NPY), the most abundant neuropeptide in the body, plays a crucial role with its stress-relieving properties. Quantitative measurement of NPY is imperative for understanding its role in these and other biological processes. Although aptamer-modified electrodes for NPY detection using EIS present a promising alternative, the correlation between the data obtained and the adsorption process on the electrodes is not fully understood. Various studies utilize the change in charge transfer resistance when employing an active redox label. In contrast, label-free measurement relies on changes in capacitance. To address these challenges, we focused on the interaction between aptamer-modified planar electrodes and their target, NPY. We proposed utilizing -ω*Zimag as the analytical signal, which facilitated the analysis of the adsorption process using an analogous Langmuir isotherm equation. This approach differs from implantable microelectrodes, which adhere to the Freundlich adsorption isotherm. Notably, our method obviates the need for a redox label and enables the detection of NPY at concentrations as low as 20 pg/mL. This methodology demonstrated exceptional selectivity, exhibiting a signal difference of over 20-to-1 against potential interfering molecules.
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Affiliation(s)
- Luis López
- Department of Chemistry, University of Puerto Rico – Rio Piedras, 17 Ave Universidad Ste 1701, San Juan, Puerto Rico 00931, United States
| | - Lyza M. Martínez
- Department of Chemistry, Universidad Ana G. Méndez – Gurabo, Carr. 189, Km 3.3, Gurabo, Puerto Rico 00778, United States
| | - Jaileen R. Caicedo
- Department of Chemistry, University of Puerto Rico – Rio Piedras, 17 Ave Universidad Ste 1701, San Juan, Puerto Rico 00931, United States
| | - Lauren Fernández-Vega
- Department of Chemistry, Universidad Ana G. Méndez – Gurabo, Carr. 189, Km 3.3, Gurabo, Puerto Rico 00778, United States
- Department of Chemistry, Universidad Ana G. Méndez – Cupey, 1399 Ave Ana G Mendez, Cupey, Puerto Rico 00925, United States
| | - Lisandro Cunci
- Department of Chemistry, University of Puerto Rico – Rio Piedras, 17 Ave Universidad Ste 1701, San Juan, Puerto Rico 00931, United States
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3
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Zhao Z, Hou Y, Zhang H, Guo J, Wang J. A PEDOT: PSS/GO fiber microelectrode fabricated by microfluidic spinning for dopamine detection in human serum and PC12 cells. Mikrochim Acta 2024; 191:362. [PMID: 38822867 DOI: 10.1007/s00604-024-06415-z] [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: 12/21/2023] [Accepted: 05/04/2024] [Indexed: 06/03/2024]
Abstract
Rapid and accurate in situ determination of dopamine is of great significance in the study of neurological diseases. In this work, poly (3,4-ethylenedioxythiophene): poly (styrenesulfonic acid) (PEDOT: PSS)/graphene oxide (GO) fibers were fabricated by an effective method based on microfluidic wet spinning technology. The composite microfibers with stratified and dense arrangement were continuously prepared by injecting PEDOT: PSS and GO dispersion solutions into a microfluidic chip. PEDOT: PSS/GO fiber microelectrodes with high electrochemical activity and enhanced electrochemical oxidation activity of dopamine were constructed by controlling the structure composition of the microfibers with varying flow rate. The fabricated fiber microelectrode had a low detection limit (4.56 nM) and wide detection range (0.01-8.0 µM) for dopamine detection with excellent stability, repeatability, and reproducibility. In addition, the PEDOT: PSS/GO fiber microelectrode prepared was successfully used for the detection of dopamine in human serum and PC12 cells. The strategy for the fabrication of multi-component fiber microelectrodes is a new and effective approach for monitoring the intercellular neurotransmitter dopamine and has high potential as an implantable neural microelectrode.
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Affiliation(s)
- Zexu Zhao
- Colleges of Chemistry and Pharmacy, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China
| | - Yang Hou
- Colleges of Chemistry and Pharmacy, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China
| | - Hao Zhang
- Colleges of Chemistry and Pharmacy, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China
| | - Jiahao Guo
- Colleges of Chemistry and Pharmacy, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China
| | - Jinyi Wang
- Colleges of Chemistry and Pharmacy, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China.
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4
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López L, Lozano K, Cruz J, Flores K, Fernández-Vega L, Cunci L. Measurement of neuropeptide Y with molecularly imprinted polypyrrole on carbon fiber microelectrodes. Neuropeptides 2024; 104:102413. [PMID: 38335798 PMCID: PMC10940184 DOI: 10.1016/j.npep.2024.102413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 01/24/2024] [Accepted: 02/03/2024] [Indexed: 02/12/2024]
Abstract
The measurement of neuropeptides using small electrodes for high spatial resolution would provide us with localized information on the release of neuromolecules. The release of Neuropeptide Y (NPY) is related to different neurological diseases such as stress, obesity, and PTSD, among others. In this conference paper, we electrodeposited polypyrrole on carbon fiber microelectrodes in the presence of NPY to develop a molecularly imprinted polypyrrole sensitive to NPY. Optimization of the electrodeposition process resulted in the full coverage of the polymer with nucleation sites on the carbon fiber ridges, achieving completion by the seventh cycle. Electrodeposition was performed for five cycles, and using cyclic voltammetry (CV), we studied the change in the oxidation current peak for polypyrrole due to the presence of NPY. We also observed a change in capacitance due to the presence of NPY, which was studied by electrochemical impedance spectroscopy (EIS). A linear correlation was found between the oxidation peak and the concentration of NPY between 50 ng/mL and 1000 ng/mL. In addition, a linear correlation was also found between microelectrode capacitance and the concentration of NPY between 50 ng/mL and 1000 ng/mL at 100 kHz.
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Affiliation(s)
- Luis López
- Department of Chemistry, University of Puerto Rico - Rio Piedras, 17 Ave Universidad Ste 1701, San Juan, PR 00931, United States
| | - Kelly Lozano
- Department of Chemistry, Universidad Ana G. Méndez, Carr. 189, Km 3.3, Gurabo, PR 00778, United States
| | - John Cruz
- Department of Chemistry, University of Puerto Rico - Rio Piedras, 17 Ave Universidad Ste 1701, San Juan, PR 00931, United States
| | - Krystal Flores
- Department of Chemistry, Universidad Ana G. Méndez, Carr. 189, Km 3.3, Gurabo, PR 00778, United States
| | - Lauren Fernández-Vega
- Department of Chemistry, Universidad Ana G. Méndez, Carr. 189, Km 3.3, Gurabo, PR 00778, United States
| | - Lisandro Cunci
- Department of Chemistry, University of Puerto Rico - Rio Piedras, 17 Ave Universidad Ste 1701, San Juan, PR 00931, United States.
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5
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Ahmad HMN, Andrade A, Song E. Continuous Real-Time Detection of Serotonin Using an Aptamer-Based Electrochemical Biosensor. BIOSENSORS 2023; 13:983. [PMID: 37998158 PMCID: PMC10669129 DOI: 10.3390/bios13110983] [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: 10/07/2023] [Revised: 11/02/2023] [Accepted: 11/09/2023] [Indexed: 11/25/2023]
Abstract
Serotonin (5-HT) is a critical neurotransmitter involved in many neuronal functions, and 5-HT depletion has been linked to several mental diseases. The fast release and clearance of serotonin in the extracellular space, low analyte concentrations, and a multitude of interfering species make the detection of serotonin challenging. This work presents an electrochemical aptamer-based biosensing platform that can monitor 5-HT continuously with high sensitivity and selectivity. Our electrochemical sensor showed a response time of approximately 1 min to a step change in the serotonin concentration in continuous monitoring using a single-frequency EIS (electrochemical impedance spectroscopy) technique. The developed sensing platform was able to detect 5-HT in the range of 25-150 nM in the continuous sample fluid flow with a detection limit (LOD) of 5.6 nM. The electrochemical sensor showed promising selectivity against other species with similar chemical structures and redox potentials, including dopamine (DA), norepinephrine (NE), L-tryptophan (L-TP), 5-hydroxyindoleacetic acid (5-HIAA), and 5-hydroxytryptophan (5-HTP). The proposed sensing platform is able to achieve high selectivity in the nanomolar range continuously in real-time, demonstrating the potential for monitoring serotonin from neurons in organ-on-a-chip or brain-on-a-chip-based platforms.
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Affiliation(s)
- Habib M. N. Ahmad
- Department of Electrical & Computer Engineering, University of New Hampshire, Durham, NH 03824, USA;
| | - Arturo Andrade
- Robert J. & Nancy D. Carney Institute for Brain Science, Brown University, Providence, RI 02912, USA;
- Department of Neuroscience, Brown University, Providence, RI 02912, USA
| | - Edward Song
- Department of Electrical & Computer Engineering, University of New Hampshire, Durham, NH 03824, USA;
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6
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Mintz Hemed N, Leal-Ortiz S, Zhao ET, Melosh NA. On-Demand, Reversible, Ultrasensitive Polymer Membrane Based on Molecular Imprinting Polymer. ACS NANO 2023; 17:5632-5643. [PMID: 36913954 PMCID: PMC10062346 DOI: 10.1021/acsnano.2c11618] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 03/08/2023] [Indexed: 06/18/2023]
Abstract
The development of in vivo, longitudinal, real-time monitoring devices is an essential step toward continuous, precision health monitoring. Molecularly imprinted polymers (MIPs) are popular sensor capture agents that are more robust than antibodies and have been used for sensors, drug delivery, affinity separations, assays, and solid-phase extraction. However, MIP sensors are typically limited to one-time use due to their high binding affinity (>107 M-1) and slow-release kinetics (<10-4 μM/sec). To overcome this challenge, current research has focused on stimuli-responsive MIPs (SR-MIPs), which undergo a conformational change induced by external stimuli to reverse molecular binding, requiring additional chemicals or outside stimuli. Here, we demonstrate fully reversible MIP sensors based on electrostatic repulsion. Once the target analyte is bound within a thin film MIP on an electrode, a small electrical potential successfully releases the bound molecules, enabling repeated, accurate measurements. We demonstrate an electrostatically refreshed dopamine sensor with a 760 pM limit of detection, linear response profile, and accuracy even after 30 sensing-release cycles. These sensors could repeatedly detect <1 nM dopamine released from PC-12 cells in vitro, demonstrating they can longitudinally measure low concentrations in complex biological environments without clogging. Our work provides a simple and effective strategy for enhancing the use of MIPs-based biosensors for all charged molecules in continuous, real-time health monitoring and other sensing applications.
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Affiliation(s)
- Nofar Mintz Hemed
- Department
of Materials Science and Engineering, Stanford
University, Stanford, California 94305, United States
| | - Sergio Leal-Ortiz
- Department
of Psychiatry and Behavioral Sciences, Stanford
University, Stanford, California 94304, United States
| | - Eric T. Zhao
- Department
of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Nicholas A. Melosh
- Department
of Materials Science and Engineering, Stanford
University, Stanford, California 94305, United States
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7
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Espinosa A, Diaz J, Vazquez E, Acosta L, Santiago A, Cunci L. Fabrication of paper-based microfluidic devices using a 3D printer and a commercially-available wax filament. TALANTA OPEN 2022; 6. [PMID: 36093430 PMCID: PMC9454060 DOI: 10.1016/j.talo.2022.100142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
In this work, we developed an alternative manufacturing paper-based microfluidics method through 3D printing and wax filament. Microfluidic paper-based analytical devices (μPADs) are low-cost and easy-to-manufacture tools used for various chemical and biological analyses and studies. Paper-based microfluidics with wax has been limited as the manufacturers have discontinued most wax printing equipment. We aim to develop a low-cost and accessible manufacturing method that can replace conventional wax-on paper-based microfluidic manufacturing methods. Using highly available commercial 3D printing technology and wax filament, we could create hydrophobic wax barriers on the surface of different paper types. The properties and limits of this manufacturing method were characterized. Moreover, using this paper-based microfluidic manufacturing method, we were able to measure dopamine electrochemically using μPAD as a passive flow-based method in concentrations as low as 1 nM using injections as small as 15 μL.
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8
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Tan C, Robbins EM, Wu B, Cui XT. Recent Advances in In Vivo Neurochemical Monitoring. MICROMACHINES 2021; 12:208. [PMID: 33670703 PMCID: PMC7922317 DOI: 10.3390/mi12020208] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 02/11/2021] [Accepted: 02/14/2021] [Indexed: 12/20/2022]
Abstract
The brain is a complex network that accounts for only 5% of human mass but consumes 20% of our energy. Uncovering the mysteries of the brain's functions in motion, memory, learning, behavior, and mental health remains a hot but challenging topic. Neurochemicals in the brain, such as neurotransmitters, neuromodulators, gliotransmitters, hormones, and metabolism substrates and products, play vital roles in mediating and modulating normal brain function, and their abnormal release or imbalanced concentrations can cause various diseases, such as epilepsy, Alzheimer's disease, and Parkinson's disease. A wide range of techniques have been used to probe the concentrations of neurochemicals under normal, stimulated, diseased, and drug-induced conditions in order to understand the neurochemistry of drug mechanisms and develop diagnostic tools or therapies. Recent advancements in detection methods, device fabrication, and new materials have resulted in the development of neurochemical sensors with improved performance. However, direct in vivo measurements require a robust sensor that is highly sensitive and selective with minimal fouling and reduced inflammatory foreign body responses. Here, we review recent advances in neurochemical sensor development for in vivo studies, with a focus on electrochemical and optical probes. Other alternative methods are also compared. We discuss in detail the in vivo challenges for these methods and provide an outlook for future directions.
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Affiliation(s)
- Chao Tan
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15261, USA; (C.T.); (E.M.R.); (B.W.)
| | - Elaine M. Robbins
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15261, USA; (C.T.); (E.M.R.); (B.W.)
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Bingchen Wu
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15261, USA; (C.T.); (E.M.R.); (B.W.)
- Center for Neural Basis of Cognition, Pittsburgh, PA 15213, USA
| | - Xinyan Tracy Cui
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15261, USA; (C.T.); (E.M.R.); (B.W.)
- Center for Neural Basis of Cognition, Pittsburgh, PA 15213, USA
- McGowan Institute for Regenerative Medicine, Pittsburgh, PA 15219, USA
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9
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López L, Hernández N, Reyes Morales J, Cruz J, Flores K, González-Amoretti J, Rivera V, Cunci L. Measurement of Neuropeptide Y Using Aptamer-Modified Microelectrodes by Electrochemical Impedance Spectroscopy. Anal Chem 2021; 93:973-980. [PMID: 33297678 PMCID: PMC7856015 DOI: 10.1021/acs.analchem.0c03719] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Aptamer-modified microelectrodes for Neuropeptide Y measurement by electrochemical impedance spectroscopy was described here. The advantages of using carbon fiber or platinum microelectrodes are because they are promising materials with high electrical conductivity, chemical stability, and high surface area that can be easily modified on their surface. The immobilization and biofouling were studied and compared using EIS. Moreover, the adsorption of NPY to the aptamer-modified microelectrodes was also demonstrated by EIS. Changes of -ω*Zimag, an impedance factor that gives information of the capacitance, is directly correlated with concentrations. A widely linear range was obtained from 10 to 1000 ng/mL of NPY. This method was able to detect NPY without performing a redox reaction by adsorption at the surface of the microelectrodes, with the specificity provided by aptamer functionalization of the microelectrode surface.
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Affiliation(s)
- Luis López
- Department of Chemistry, Universidad Ana G. Méndez, Carr. 189, Km 3.3, Gurabo, Puerto Rico 00778, United States
| | - Nerika Hernández
- Department of Chemistry, Universidad Ana G. Méndez, Carr. 189, Km 3.3, Gurabo, Puerto Rico 00778, United States
| | - Joshua Reyes Morales
- Department of Chemistry, Universidad Ana G. Méndez, Carr. 189, Km 3.3, Gurabo, Puerto Rico 00778, United States
| | - John Cruz
- Department of Chemistry, Universidad Ana G. Méndez, Carr. 189, Km 3.3, Gurabo, Puerto Rico 00778, United States
| | - Krystal Flores
- Department of Chemistry, Universidad Ana G. Méndez, Carr. 189, Km 3.3, Gurabo, Puerto Rico 00778, United States
| | - John González-Amoretti
- Department of Chemistry, Universidad Ana G. Méndez, Carr. 189, Km 3.3, Gurabo, Puerto Rico 00778, United States
| | - Vitmary Rivera
- Department of Chemistry, Universidad Ana G. Méndez, Carr. 189, Km 3.3, Gurabo, Puerto Rico 00778, United States
| | - Lisandro Cunci
- Department of Chemistry, Universidad Ana G. Méndez, Carr. 189, Km 3.3, Gurabo, Puerto Rico 00778, United States
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10
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Wang T, Yang L, Li Y, Bao C, Tang M, Huang X, Cheng H. Simple and Efficient Synthesis of Various Sized Gold Nanoparticles for the Selective Electrochemical Determination of Dopamine. ANAL LETT 2020. [DOI: 10.1080/00032719.2020.1793995] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Tingting Wang
- College of Pharmacy, South Central University for Nationalities, Wuhan, China
| | - Lili Yang
- College of Pharmacy, South Central University for Nationalities, Wuhan, China
| | - Yuan Li
- College of Pharmacy, South Central University for Nationalities, Wuhan, China
| | - Changhao Bao
- College of Pharmacy, South Central University for Nationalities, Wuhan, China
| | - Minyi Tang
- College of Pharmacy, South Central University for Nationalities, Wuhan, China
| | - Xianju Huang
- College of Pharmacy, South Central University for Nationalities, Wuhan, China
| | - Han Cheng
- College of Pharmacy, South Central University for Nationalities, Wuhan, China
- National Demonstration Center for Experimental Ethnopharmacology Education, South-Central University for Nationalities, Wuhan, China
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11
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Fang C, Du D, Li D, Huang J, Tu Y. An electrochemiluminescent sensing matrix for real-time probing of cell-output reactive oxygen species. BIOMICROFLUIDICS 2019; 13:044115. [PMID: 31531152 PMCID: PMC6735663 DOI: 10.1063/1.5111379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Accepted: 08/15/2019] [Indexed: 06/10/2023]
Abstract
Herein, a novel cell-based electrochemiluminescent (ECL) sensing matrix was developed for probing reactive oxygen species (ROSs) produced from mouse macrophage cells. Uniformly sized Au nanoparticles (AuNPs) with an average diameter of 16 nm were decorated on the surface of indium tin oxide (ITO) glass through the connection of hydrolyzed 3-aminopropyl trimethoxysilane (APTMS) serving as a sensor substrate. Then, the surface was covered with a poly-l-lysine thin film, where mouse macrophage cells were successfully cultured. The morphology of the electrodes obtained was characterized by scanning electron microscopy and atomic force microscopy, and their electrochemical properties were investigated by electrochemical impedance spectroscopy. A linear response was observed from the AuNPs/APTMS/ITO substrate with a sensitivity of 0.465 units per mg/l of H2O2, and a higher sensitivity of 207 units per mg/l of zymosan. Thereafter, a factor of 84 molecules of H2O2 produced by a single glycogen was estimated. The results demonstrated that the ECL response of this cell-based sensor quantitatively correlated with yielded ROSs during cell oxygen metabolism under the stimulation of zymosan. This work suggests that the prepared sensing matrix is efficient for monitoring the oxygen metabolism of living cells and can be applied in biological and clinical fields to provide significant information on the regular or abnormal function of cells.
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Affiliation(s)
| | - Dan Du
- College of Chemistry, Chemical Engineering and Material Science, Dushu Lake Campus, Soochow University, Industrial Park, Suzhou 215123, People’s Republic of China
| | - Dongning Li
- College of Chemistry, Chemical Engineering and Material Science, Dushu Lake Campus, Soochow University, Industrial Park, Suzhou 215123, People’s Republic of China
| | - Jie Huang
- School of Biology & Basic Medical Science, Dushu Lake Campus, Soochow University, Industrial Park, Suzhou 215123, People’s Republic of China
| | - Yifeng Tu
- College of Chemistry, Chemical Engineering and Material Science, Dushu Lake Campus, Soochow University, Industrial Park, Suzhou 215123, People’s Republic of China
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12
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Ayala-Charca G, Munidasa S, Ghafar-Zadeh E, Magerowski S. A high-throughput impedimetric platform for cellular analysis: Design, Implementation and Experimental Results. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2018; 2018:4261-4264. [PMID: 30441295 DOI: 10.1109/embc.2018.8513396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
A high-throughput impedance spectroscopy measurement system was designed and developed for the purpose of biological analysis. This platform consists of a microchip containing a microelectrode array and a multiplexing interface system. Herein we put forward the proposed platform and demonstrate its functionality by performing impedance analysis using N2a cells and its associated medium. The early experimental results demonstrated the high-through impedimetric system to be a strong basis for future modification and development.
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13
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Ling X, Shi R, Zhang J, Liu D, Weng M, Zhang C, Lu M, Xie X, Huang L, Huang W. Dual-Signal Luminescent Detection of Dopamine by a Single Type of Lanthanide-Doped Nanoparticles. ACS Sens 2018; 3:1683-1689. [PMID: 30095257 DOI: 10.1021/acssensors.8b00368] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Detection of dopamine, an important neurotransmitter, is vital for understanding its roles in mammals and disease diagnosis. However, commonly available methods for dopamine detection typically rely on a single signal readout, which can be susceptible to interference by internal or external factors. Here, we report a dual-signal detection of dopamine based on label-free luminescent NaGdF4:Tb nanoparticles. In the presence of dopamine, the NaGdF4:Tb nanoparticles exhibit luminescence quenching under the excitation of 272 nm, while they give enhanced luminescence under 297 nm excitation, realizing both turn off and turn on detection of dopamine. The nanoparticle-based dual-signal sensors exhibit high sensitivity, with a detection limit of ∼30 nM, and good selectivity, which offers the possibility to identify potential interferents in the samples. We further demonstrate that the dual-signal response results from different energy-transfer processes within the nanoparticles under the excitation of different light. The new strategy demonstrated here should pave the way for the development of multiresponse nanosensors based on lanthanide-doped luminescent nanomaterials.
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Affiliation(s)
- Xincan Ling
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, P.R. China
| | - Ruikai Shi
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, P.R. China
| | - Juan Zhang
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, P.R. China
| | - Dongmei Liu
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, P.R. China
| | - Minrui Weng
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, P.R. China
| | - Chengwu Zhang
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, P.R. China
| | - Min Lu
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, P.R. China
| | - Xiaoji Xie
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, P.R. China
| | - Ling Huang
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, P.R. China
| | - Wei Huang
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, P.R. China
- Shaanxi Institute of Flexible Electronics, Northwestern Polytechnical University, Xi’an 710072, China
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