1
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Starodubtseva MN, Shkliarava NM, Chelnokova IA, Villalba MI, Krylov AY, Nadyrov EA, Kasas S. Mechanical Properties and Nanomotion of BT-20 and ZR-75 Breast Cancer Cells Studied by Atomic Force Microscopy and Optical Nanomotion Detection Method. Cells 2023; 12:2362. [PMID: 37830577 PMCID: PMC10572077 DOI: 10.3390/cells12192362] [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: 08/25/2023] [Revised: 09/22/2023] [Accepted: 09/23/2023] [Indexed: 10/14/2023] Open
Abstract
Cells of two molecular genetic types of breast cancer-hormone-dependent breast cancer (ZR-75 cell line) and triple-negative breast cancer (BT-20 cell line)-were studied using atomic force microscopy and an optical nanomotion detection method. Using the Peak Force QNM and Force Volume AFM modes, we revealed the unique patterns of the dependence of Young's modulus on the indentation depth for two cancer cell lines that correlate with the features of the spatial organization of the actin cytoskeleton. Within a 200-300 nm layer just under the cell membrane, BT-20 cells are stiffer than ZR-75 cells, whereas in deeper cell regions, Young's modulus of ZR-75 cells exceeds that of BT-20 cells. Two cancer cell lines also displayed a difference in cell nanomotion dynamics upon exposure to cytochalasin D, a potent actin polymerization inhibitor. The drug strongly modified the nanomotion pattern of BT-20 cells, whereas it had almost no effect on the ZR-75 cells. We are confident that nanomotion monitoring and measurement of the stiffness of cancer cells at various indentation depths deserve further studies to obtain effective predictive parameters for use in clinical practice.
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Affiliation(s)
- Maria N. Starodubtseva
- Department of Medical and Biological Physics, Gomel State Medical University, 246000 Gomel, Belarus
- Laboratory of the Stability of Biological Systems, Radiobiology Institute of NAS of Belarus, 246007 Gomel, Belarus; (N.M.S.); (I.A.C.)
| | - Nastassia M. Shkliarava
- Laboratory of the Stability of Biological Systems, Radiobiology Institute of NAS of Belarus, 246007 Gomel, Belarus; (N.M.S.); (I.A.C.)
| | - Irina A. Chelnokova
- Laboratory of the Stability of Biological Systems, Radiobiology Institute of NAS of Belarus, 246007 Gomel, Belarus; (N.M.S.); (I.A.C.)
| | - María I. Villalba
- Laboratory of Biological Electron Microscopy, Ecole Polytechnique Fédérale de Lausanne (EPFL), University of Lausanne (UNIL), 1015 Lausanne, Switzerland; (M.I.V.); (S.K.)
- Centre Universitaire Romand de Médecine Légale, UFAM, University of Lausanne, 1015 Lausanne, Switzerland
| | - Andrei Yu. Krylov
- Department of Forensic Medicine, Institute of Further Training and Retraining of the Personnel, State Forensic Examination Committee of the Republic of Belarus, 220033 Minsk, Belarus;
| | - Eldar A. Nadyrov
- Department of Histology, Cytology and Embryology, Gomel State Medical University, 246000 Gomel, Belarus;
| | - Sandor Kasas
- Laboratory of Biological Electron Microscopy, Ecole Polytechnique Fédérale de Lausanne (EPFL), University of Lausanne (UNIL), 1015 Lausanne, Switzerland; (M.I.V.); (S.K.)
- Centre Universitaire Romand de Médecine Légale, UFAM, University of Lausanne, 1015 Lausanne, Switzerland
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2
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Luo X, Yue W, Zhang S, Liu H, Chen Z, Qiao L, Wu C, Li P, He Y. SARS-CoV-2 proteins monitored by long-range surface plasmon field-enhanced Raman scattering with hybrid bowtie nanoaperture arrays and nanocavities. LAB ON A CHIP 2023; 23:388-399. [PMID: 36621932 DOI: 10.1039/d2lc01006b] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The identification of biomacromolecules by using surface-enhanced Raman scattering (SERS) remains a challenge because of the near-field effect of traditional substrates. Long-range surface plasmon resonance (LRSPR) is a special type of surface optical phenomenon that provides higher electromagnetic field enhancement and longer penetration depth than conventional surface plasmon resonance. To break the limit of SERS detection distance and obtain a SERS substrate with increased enhancement ability, a bowtie nanoaperture array was sandwiched between two symmetric dielectric environments. Then, an Au mirror was inserted to form a metal-insulator-metal configuration. Finite-difference time-domain simulations revealed that numerous hybrid modes can be provided by this novel configuration (denoted as long-range SERS [LR-SERS] substrate). In particular, the LRSPR mode can be excited and reach the maximum value through the regulation of the polarizations of the incident light and the geometrical parameters of the LR-SERS substrate. The optimized LR-SERS substrate was then applied to detect SARS-CoV-2 spike (S) and nucleocapsid (N) proteins. This substrate displayed ultralow detection limits of ∼9.2 and ∼11.3 pg mL-1 for the S and N proteins, respectively. Moreover, with the help of principal component analysis and receiver operating characteristic methods, our fabricated sensors exhibited excellent selectivity and hold great potential for the diagnosis of SARS-CoV-2 proteins in real samples.
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Affiliation(s)
- Xiaojun Luo
- School of Science, Xihua University, Chengdu 610039, P. R. China.
| | - Weiling Yue
- School of Science, Xihua University, Chengdu 610039, P. R. China.
| | - Shutong Zhang
- School of Science, Xihua University, Chengdu 610039, P. R. China.
| | - Haopeng Liu
- School of Science, Xihua University, Chengdu 610039, P. R. China.
| | - Zhinan Chen
- School of Science, Xihua University, Chengdu 610039, P. R. China.
| | - Ling Qiao
- Division of Chemistry and Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Caijun Wu
- School of Science, Xihua University, Chengdu 610039, P. R. China.
| | - Panjie Li
- School of Chemistry and Chemical Engineering, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
| | - Yi He
- School of Science, Xihua University, Chengdu 610039, P. R. China.
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3
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Wu P, Luo X, Xu Y, Zhu J, Jia W, Fang N, Cai C, Zhu JJ. Long-Range SERS Detection of the SARS-CoV-2 Antigen on a Well-Ordered Gold Hexagonal Nanoplate Film. Anal Chem 2022; 94:17541-17550. [PMID: 36475600 PMCID: PMC9743488 DOI: 10.1021/acs.analchem.2c03846] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 11/01/2022] [Indexed: 12/12/2022]
Abstract
The development of an effective method for identifying severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) via direct viral protein detection is significant but challenging in combatting the COVID-19 epidemic. As a promising approach for direct detection, viral protein detection using surface-enhanced Raman scattering (SERS) is limited by the larger viral protein size compared to the effective electromagnetic field (E-field) range because only the analyte remaining within the E-field can achieve high detection sensitivity. In this study, we designed and fabricated a novel long-range SERS (LR-SERS) substrate with an Au nanoplate film/MgF2/Au mirror/glass configuration to boost the LR-SERS resulting from the extended E-field. On applying the LR-SERS to detect the SARS-CoV-2 spike protein (S protein), reagent-free detection achieved a low detection limit of 9.8 × 10-11 g mL-1 and clear discrimination from the SARS-CoV S protein. The developed technique also allows testing of the S protein in saliva with 98% sensitivity and 100% specificity.
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Affiliation(s)
- Ping Wu
- Jiangsu Key Laboratory of New Power Batteries, Jiangsu
Collaborative Innovation Center of Biomedical Functional Materials, College of Chemistry
and Materials Science, Nanjing Normal University,
Nanjing210023, P. R. China
| | - Xiaojun Luo
- Jiangsu Key Laboratory of New Power Batteries, Jiangsu
Collaborative Innovation Center of Biomedical Functional Materials, College of Chemistry
and Materials Science, Nanjing Normal University,
Nanjing210023, P. R. China
- School of Science, Xihua
University, Chengdu610039, P. R. China
| | - Yihong Xu
- Jiangsu Key Laboratory of New Power Batteries, Jiangsu
Collaborative Innovation Center of Biomedical Functional Materials, College of Chemistry
and Materials Science, Nanjing Normal University,
Nanjing210023, P. R. China
| | - Jingtian Zhu
- Jiangsu Key Laboratory of New Power Batteries, Jiangsu
Collaborative Innovation Center of Biomedical Functional Materials, College of Chemistry
and Materials Science, Nanjing Normal University,
Nanjing210023, P. R. China
| | - Wenyu Jia
- Jiangsu Key Laboratory of New Power Batteries, Jiangsu
Collaborative Innovation Center of Biomedical Functional Materials, College of Chemistry
and Materials Science, Nanjing Normal University,
Nanjing210023, P. R. China
| | - Ningning Fang
- Jiangsu Key Laboratory of New Power Batteries, Jiangsu
Collaborative Innovation Center of Biomedical Functional Materials, College of Chemistry
and Materials Science, Nanjing Normal University,
Nanjing210023, P. R. China
| | - Chenxin Cai
- Jiangsu Key Laboratory of New Power Batteries, Jiangsu
Collaborative Innovation Center of Biomedical Functional Materials, College of Chemistry
and Materials Science, Nanjing Normal University,
Nanjing210023, P. R. China
| | - Jun-Jie Zhu
- State Key Laboratory of Analytical for Life Science,
School of Chemistry & Chemical Engineering, Nanjing
University, Nanjing210023, P. R. China
- Shenzhen Research Institute of Nanjing
University, Shenzhen518000, China
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4
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Guo Z, Yang CT, Chien CC, Selth LA, Bagnaninchi PO, Thierry B. Optical Cellular Micromotion: A New Paradigm to Measure Tumor Cells Invasion within Gels Mimicking the 3D Tumor Environments. SMALL METHODS 2022; 6:e2200471. [PMID: 35764869 DOI: 10.1002/smtd.202200471] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 05/22/2022] [Indexed: 06/15/2023]
Abstract
Measuring tumor cell invasiveness through 3D tissues, particularly at the single-cell level, can provide important mechanistic understanding and assist in identifying therapeutic targets of tumor invasion. However, current experimental approaches, including standard in vitro invasion assays, have limited physiological relevance and offer insufficient insight into the vast heterogeneity in tumor cell migration through tissues. To address these issues, here the concept of optical cellular micromotion is reported on, where digital holographic microscopy is used to map the optical nano- to submicrometer thickness fluctuations within single-cells. These fluctuations are driven by the dynamic movement of subcellular structures including the cytoskeleton and inherently associated with the biological processes involved in cell invasion within tissues. It is experimentally demonstrated that the optical cellular micromotion correlates with tumor cells motility and invasiveness both at the population and single-cell levels. In addition, the optical cellular micromotion significantly reduced upon treatment with migrastatic drugs that inhibit tumor cell invasion. These results demonstrate that micromotion measurements can rapidly and non-invasively determine the invasive behavior of single tumor cells within tissues, yielding a new and powerful tool to assess the efficacy of approaches targeting tumor cell invasiveness.
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Affiliation(s)
- Zhaobin Guo
- Future Industries Institute and ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of South Australia, Mawson Lakes, SA, 5095, Australia
| | - Chih-Tsung Yang
- Future Industries Institute and ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of South Australia, Mawson Lakes, SA, 5095, Australia
| | - Chia-Chi Chien
- Future Industries Institute and ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of South Australia, Mawson Lakes, SA, 5095, Australia
| | - Luke A Selth
- Flinders Health and Medical Research Institute and Freemasons Centre for Male Health and Wellbeing, Flinders University, Bedford Park, SA, 5042, Australia
- Dame Roma Mitchell Cancer Research Laboratories and Freemasons Foundation Centre for Male Health and Wellbeing, Adelaide Medical School, The University of Adelaide, Adelaide, SA, 5000, Australia
| | - Pierre O Bagnaninchi
- Centre for Regenerative Medicine, University of Edinburgh, Edinburgh, EH16 4UU, UK
| | - Benjamin Thierry
- Future Industries Institute and ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of South Australia, Mawson Lakes, SA, 5095, Australia
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5
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Priest L, Peters JS, Kukura P. Scattering-based Light Microscopy: From Metal Nanoparticles to Single Proteins. Chem Rev 2021; 121:11937-11970. [PMID: 34587448 PMCID: PMC8517954 DOI: 10.1021/acs.chemrev.1c00271] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Indexed: 02/02/2023]
Abstract
Our ability to detect, image, and quantify nanoscopic objects and molecules with visible light has undergone dramatic improvements over the past few decades. While fluorescence has historically been the go-to contrast mechanism for ultrasensitive light microscopy due to its superior background suppression and specificity, recent developments based on light scattering have reached single-molecule sensitivity. They also have the advantages of universal applicability and the ability to obtain information about the species of interest beyond its presence and location. Many of the recent advances are driven by novel approaches to illumination, detection, and background suppression, all aimed at isolating and maximizing the signal of interest. Here, we review these developments grouped according to the basic principles used, namely darkfield imaging, interferometric detection, and surface plasmon resonance microscopy.
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Affiliation(s)
| | | | - Philipp Kukura
- Physical and Theoretical
Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
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6
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Wang SH, Tung TH, Chiu SP, Chou HY, Hung YH, Lai YT, Lee YW, Lee SP, Lo CM. Detecting Effects of Low Levels of FCCP on Stem Cell Micromotion and Wound-Healing Migration by Time-Series Capacitance Measurement. SENSORS 2021; 21:s21093017. [PMID: 33923058 PMCID: PMC8123359 DOI: 10.3390/s21093017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 04/23/2021] [Accepted: 04/23/2021] [Indexed: 01/17/2023]
Abstract
Electric cell–substrate impedance sensing (ECIS) has been used as a real-time impedance-based method to quantify cell behavior in tissue culture. The method is capable of measuring both the resistance and capacitance of a cell-covered microelectrode at various AC frequencies. In this study, we demonstrate the application of high-frequency capacitance measurement (f = 40 or 64 kHz) for the sensitive detection of both the micromotion and wound-healing migration of human mesenchymal stem cells (hMSCs). Impedance measurements of cell-covered electrodes upon the challenge of various concentrations of carbonyl cyanide 4-(trifluoromethoxy)phenylhydrazone (FCCP), from 0.1 to 30 μM, were conducted using ECIS. FCCP is an uncoupler of mitochondrial oxidative phosphorylation (OXPHOS), thereby reducing mitochondrial ATP production. By numerically analyzing the time-series capacitance data, a dose-dependent decrease in hMSC micromotion and wound-healing migration was observed, and the effect was significantly detected at levels as low as 0.1 μM. While most reported works with ECIS use the resistance/impedance time series, our results suggest the potential use of high-frequency capacitance time series for assessing migratory cell behavior such as micromotion and wound-healing migration.
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Affiliation(s)
- Si-Han Wang
- Department of Biomedical Engineering, National Yang-Ming University, Taipei 11221, Taiwan; (S.-H.W.); (T.-H.T.); (H.-Y.C.); (Y.-H.H.); (Y.-T.L.); (Y.-W.L.)
| | - Tse-Hua Tung
- Department of Biomedical Engineering, National Yang-Ming University, Taipei 11221, Taiwan; (S.-H.W.); (T.-H.T.); (H.-Y.C.); (Y.-H.H.); (Y.-T.L.); (Y.-W.L.)
| | - Sheng-Po Chiu
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Tri-Service General Hospital Songshan Branch, National Defense Medical Center, Taipei 11490, Taiwan;
| | - Hsin-Yi Chou
- Department of Biomedical Engineering, National Yang-Ming University, Taipei 11221, Taiwan; (S.-H.W.); (T.-H.T.); (H.-Y.C.); (Y.-H.H.); (Y.-T.L.); (Y.-W.L.)
| | - Yu-Han Hung
- Department of Biomedical Engineering, National Yang-Ming University, Taipei 11221, Taiwan; (S.-H.W.); (T.-H.T.); (H.-Y.C.); (Y.-H.H.); (Y.-T.L.); (Y.-W.L.)
| | - Yi-Ting Lai
- Department of Biomedical Engineering, National Yang-Ming University, Taipei 11221, Taiwan; (S.-H.W.); (T.-H.T.); (H.-Y.C.); (Y.-H.H.); (Y.-T.L.); (Y.-W.L.)
| | - Yu-Wei Lee
- Department of Biomedical Engineering, National Yang-Ming University, Taipei 11221, Taiwan; (S.-H.W.); (T.-H.T.); (H.-Y.C.); (Y.-H.H.); (Y.-T.L.); (Y.-W.L.)
| | - Shiao-Pieng Lee
- Division of Oral and Maxillofacial Surgery, Department of Dentistry, Tri-Service General Hospital, Taipei 11490, Taiwan
- School of Dentistry, National Defense Medical Center, Taipei 11490, Taiwan
- Department of Biomedical Engineering, National Defense Medical Center, Taipei 11490, Taiwan
- Correspondence: (S.-P.L.); (C.-M.L.)
| | - Chun-Min Lo
- Department of Biomedical Engineering, National Yang-Ming University, Taipei 11221, Taiwan; (S.-H.W.); (T.-H.T.); (H.-Y.C.); (Y.-H.H.); (Y.-T.L.); (Y.-W.L.)
- Correspondence: (S.-P.L.); (C.-M.L.)
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7
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Thi Tran NH, Phung VD, Thi Ta HK, Lam VD, Manh DH, Pham NK, Kim JY, Lee NY, Phan BT. Ultrasensitive biosensors based on waveguide-coupled long-range surface plasmon resonance (WC-LRSPR) for enhanced fluorescence spectroscopy. RSC Adv 2021; 11:22450-22460. [PMID: 35480844 PMCID: PMC9034228 DOI: 10.1039/d1ra02130c] [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] [Received: 03/17/2021] [Accepted: 06/12/2021] [Indexed: 11/21/2022] Open
Abstract
We investigated the coupling phenomenon between plasmonic resonance and waveguide modes through theoretical and experimental parametric analyses on the bimetallic waveguide-coupled long-range surface plasmon resonance (Bi-WCLRSPR) structure.
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Affiliation(s)
- Nhu Hoa Thi Tran
- Faculty of Materials Science
- University of Science
- HoChiMinh City
- Vietnam
- Vietnam National University
| | - Viet-Duc Phung
- Future Materials and Devices Laboratory
- Duy Tan University
- Ho Chi Minh City
- Vietnam
- Faculty of Environmental and Chemical Engineering
| | - Hanh Kieu Thi Ta
- Faculty of Materials Science
- University of Science
- HoChiMinh City
- Vietnam
- Vietnam National University
| | - Vu Dinh Lam
- Graduate University of Science and Technology
- Vietnam Academy of Science and Technology
- Hanoi
- Vietnam
| | - Do Hung Manh
- Institute of Materials Science
- Vietnam Academy of Science and Technology
- Hanoi
- Vietnam
| | - Ngoc Kim Pham
- Faculty of Materials Science
- University of Science
- HoChiMinh City
- Vietnam
- Vietnam National University
| | - Jae Young Kim
- Department of Life Science
- Gachon University
- Seongnam-si
- Republic of Korea
| | - Nae Yoon Lee
- Department of BioNano Technology
- Gachon University
- Seongnam-si
- Republic of Korea
| | - Bach Thang Phan
- Vietnam National University
- HoChiMinh City
- Vietnam
- Center for Innovative Materials and Architectures (INOMAR)
- HoChiMinh City
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8
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Wang B, Park B. Immunoassay Biosensing of Foodborne Pathogens with Surface Plasmon Resonance Imaging: A Review. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:12927-12939. [PMID: 32816471 DOI: 10.1021/acs.jafc.0c02295] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Surface plasmon resonance imaging (SPRi) has been increasingly used in the label-free detections of various biospecies, such as organic toxins, proteins, and bacteria. In combination with the well-developed microarray immunoassay, SPRi has the advantages of rapid detection in tens of minutes and multiplex detection of different targets with the same biochip. Both prism-based and prism-free configurations of SPRi have been developed for highly integrated portable immunosensors, which have shown great potential on pathogen detection and living cell imaging. This review summarizes the recent advances in immunoassay biosensing with SPRi, with special emphasis on the multiplex detections of foodborne pathogens. Additionally, various spotting techniques, surface modification protocols, and signal amplification methods have been developed to improve the specificity and sensitivity of the SPRi biochip. The challenges in multiplex detections of foodborne pathogens in real-world samples are addressed, and future perspectives of miniaturizing SPRi immunosensors with nanotechnologies are discussed.
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Affiliation(s)
- Bin Wang
- United States National Poultry Research Center, Agricultural Research Service (ARS), United States Department of Agriculture (USDA), 950 College Station Road, Athens, Georgia 30605, United States
| | - Bosoon Park
- United States National Poultry Research Center, Agricultural Research Service (ARS), United States Department of Agriculture (USDA), 950 College Station Road, Athens, Georgia 30605, United States
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9
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Tung TH, Wang SH, Huang CC, Su TY, Lo CM. Use of Discrete Wavelet Transform to Assess Impedance Fluctuations Obtained from Cellular Micromotion. SENSORS 2020; 20:s20113250. [PMID: 32517325 PMCID: PMC7309086 DOI: 10.3390/s20113250] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 06/05/2020] [Accepted: 06/05/2020] [Indexed: 12/21/2022]
Abstract
Electric cell–substrate impedance sensing (ECIS) is an attractive method for monitoring cell behaviors in tissue culture in real time. The time series impedance fluctuations of the cell-covered electrodes measured by ECIS are the phenomena accompanying cellular micromotion as cells continually rearrange their cell–cell and cell–substrate adhesion sites. Accurate assessment of these fluctuations to extract useful information from raw data is important for both scientific and practical purposes. In this study, we apply discrete wavelet transform (DWT) to analyze the concentration-dependent effect of cytochalasin B on human umbilical vein endothelial cells (HUVECs). The sampling rate of the impedance time series is 1 Hz and each data set consists of 2048 points. Our results demonstrate that, in the Daubechies (db) wavelet family, db1 is the optimal mother wavelet function for DWT-based analysis to assess the effect of cytochalasin B on HUVEC micromotion. By calculating the energy, standard deviation, variance, and signal magnitude area of DWT detail coefficients at level 1, we are able to significantly distinguish cytotoxic concentrations of cytochalasin B as low as 0.1 μM, and in a concentration-dependent manner. Furthermore, DWT-based analysis indicates the possibility to decrease the sampling rate of the micromotion measurement from 1 Hz to 1/16 Hz without decreasing the discerning power. The statistical measures of DWT detail coefficients are effective methods for determining both the sampling rate and the number of individual samples for ECIS-based micromotion assays.
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Affiliation(s)
- Tse-Hua Tung
- Department of Biomedical Engineering, National Yang-Ming University, Taipei 11221, Taiwan; (T.-H.T.); (S.-H.W.); (C.-C.H.)
| | - Si-Han Wang
- Department of Biomedical Engineering, National Yang-Ming University, Taipei 11221, Taiwan; (T.-H.T.); (S.-H.W.); (C.-C.H.)
| | - Chun-Chung Huang
- Department of Biomedical Engineering, National Yang-Ming University, Taipei 11221, Taiwan; (T.-H.T.); (S.-H.W.); (C.-C.H.)
| | - Tai-Yuan Su
- Department of Electrical Engineering, Yuan-Ze University, Chung-Li 32003, Taiwan
- Correspondence: (T.-Y.S.); (C.-M.L.)
| | - Chun-Min Lo
- Department of Biomedical Engineering, National Yang-Ming University, Taipei 11221, Taiwan; (T.-H.T.); (S.-H.W.); (C.-C.H.)
- Correspondence: (T.-Y.S.); (C.-M.L.)
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10
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Zhou XL, Yang Y, Wang S, Liu XW. Surface Plasmon Resonance Microscopy: From Single-Molecule Sensing to Single-Cell Imaging. Angew Chem Int Ed Engl 2020; 59:1776-1785. [PMID: 31531917 PMCID: PMC7020607 DOI: 10.1002/anie.201908806] [Citation(s) in RCA: 73] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 08/30/2019] [Indexed: 12/20/2022]
Abstract
Surface plasmon resonance microscopy (SPRM) is a versatile platform for chemical and biological sensing and imaging. Great progress in exploring its applications, ranging from single-molecule sensing to single-cell imaging, has been made. In this Minireview, we introduce the principles and instrumentation of SPRM. We also summarize the broad and exciting applications of SPRM to the analysis of single entities. Finally, we discuss the challenges and limitations associated with SPRM and potential solutions.
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Affiliation(s)
- Xiao-Li Zhou
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science & Technology of China, Hefei, 230026, China
| | - Yunze Yang
- Center for Biosensors and Bioelectronics, Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA
| | - Shaopeng Wang
- Center for Biosensors and Bioelectronics, Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA
| | - Xian-Wei Liu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science & Technology of China, Hefei, 230026, China
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11
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Mozneb M, Mirza AM, Li CZ. Non-Invasive Plasmonic-Based Real-Time Characterization of Cardiac Drugs on Cardiomyocytes Functional Behavior. Anal Chem 2020; 92:2244-2250. [PMID: 31874559 DOI: 10.1021/acs.analchem.9b04956] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
In the fabrication of cardiac tissue, an important factor is continuous measurement of its contraction features. A module that allows for a dynamic system capable of noninvasive and label-free monitoring of the contraction profile under administering chemicals and drugs is highly valuable for understanding accurate tissue mechanobiology. In this research, we have successfully demonstrated the use of surface plasmon resonance (SPR) technology for the first time to characterize the contractility of cardiac cells in response to Blebbistatin and ATP drug exposure in real tme. An optimal flow rate of 10 μL/min was selected for a continuous flow of warm media,and 10 μM drug administration effect was detected with high spatiotemporal sensitivity on contracting cardiomyocytes. Our drug screening has identified the source of the SPR periodic signal to be direct cell contraction rather than action potentials or calcium signaling. Per our results, SPR has high potential in applications in least-interference real-time and label-free tissue characterizations and cellular properties analysis from a functional and structural point of view.
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Affiliation(s)
- Maedeh Mozneb
- Nano/Bioelectronics Laboratory, Biomedical Engineering Department , Florida International University , Miami , Florida 33174 , United States
| | - Asad M Mirza
- Nano/Bioelectronics Laboratory, Biomedical Engineering Department , Florida International University , Miami , Florida 33174 , United States
| | - Chen-Zhong Li
- Nano/Bioelectronics Laboratory, Biomedical Engineering Department , Florida International University , Miami , Florida 33174 , United States
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12
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Kohler A, Venturelli L, Longo G, Dietler G, Kasas S. Nanomotion detection based on atomic force microscopy cantilevers. Cell Surf 2019; 5:100021. [PMID: 32743137 PMCID: PMC7388971 DOI: 10.1016/j.tcsw.2019.100021] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 02/14/2019] [Accepted: 02/26/2019] [Indexed: 11/16/2022] Open
Abstract
Atomic force microscopes (AFM) or low-noise in-house dedicated devices can highlight nanomotion oscillations. The method consists of attaching the organism of interest onto a silicon-based sensor and following its nano-scale motion as a function of time. The nanometric scale oscillations exerted by biological specimens last as long the organism is viable and reflect the status of the microorganism metabolism upon exposure to different chemical or physical stimuli. During the last couple of years, the nanomotion pattern of several types of bacteria, yeasts and mammalian cells has been determined. This article reviews this technique in details, presents results obtained with dozens of different microorganisms and discusses the potential applications of nanomotion in fundamental research, medical microbiology and space exploration.
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Affiliation(s)
- A.C. Kohler
- Laboratoire de Physique de la Matière Vivante, EPFL, CH-1015 Lausanne, Switzerland
| | - L. Venturelli
- Laboratoire de Physique de la Matière Vivante, EPFL, CH-1015 Lausanne, Switzerland
| | - G. Longo
- Istituto di Struttura della Materia ISM-CNR, Rome, Italy
| | - G. Dietler
- Laboratoire de Physique de la Matière Vivante, EPFL, CH-1015 Lausanne, Switzerland
| | - S. Kasas
- Laboratoire de Physique de la Matière Vivante, EPFL, CH-1015 Lausanne, Switzerland
- Unité Facultaire d’Anatomie et de Morphologie, CUMRL, Université de Lausanne, CH-1005 Lausanne, Switzerland
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13
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Zhou X, Yang Y, Wang S, Liu X. Surface Plasmon Resonance Microscopy: From Single‐Molecule Sensing to Single‐Cell Imaging. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908806] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xiao‐Li Zhou
- CAS Key Laboratory of Urban Pollutant ConversionDepartment of Applied ChemistryUniversity of Science & Technology of China Hefei 230026 China
| | - Yunze Yang
- Center for Biosensors and Bioelectronics, Biodesign InstituteArizona State University Tempe AZ 85287 USA
| | - Shaopeng Wang
- Center for Biosensors and Bioelectronics, Biodesign InstituteArizona State University Tempe AZ 85287 USA
| | - Xian‐Wei Liu
- CAS Key Laboratory of Urban Pollutant ConversionDepartment of Applied ChemistryUniversity of Science & Technology of China Hefei 230026 China
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14
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Hirboodvash Z, Khodami M, Fong NR, Lisicka-Skrzek E, Olivieri A, Northfield H, Niall Tait R, Berini P. Grating couplers fabricated by e-beam lithography for long-range surface plasmon waveguides embedded in a fluoropolymer. APPLIED OPTICS 2019; 58:2994-3002. [PMID: 31044904 DOI: 10.1364/ao.58.002994] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 03/15/2019] [Indexed: 06/09/2023]
Abstract
Long-range surface plasmon polariton waveguides consisting of Au stripes integrated with input and output grating couplers embedded in thick Cytop claddings are proposed and demonstrated experimentally. Under the right conditions, grating couplers enable broadside (top) coupling with good efficiency while producing a low level of background light. The scheme does not require high-quality input and output edge facets, and it simplifies optical alignments. We demonstrate coupling using a cleaved bow-tie fiber and a lensed fiber, and we determine the grating coupling efficiencies in both cases over a broad operating wavelength range. The lensed fiber produces a better overlap with the long-range surface plasmon mode of interest and thus results in a better coupling efficiency with essentially no background light as observed on an infrared camera. The measurements are compared with theoretical results obtained using a realistic model of the structures, including out-of-plane curvature in the grating profile resulting from our fabrication process. The coupling scheme along with the surface plasmon waveguides hold strong potential for biosensing applications.
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15
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Hassani H, Kreysing E. Noninvasive measurement of the refractive index of cell organelles using surface plasmon resonance microscopy. OPTICS LETTERS 2019; 44:1359-1362. [PMID: 30874650 DOI: 10.1364/ol.44.001359] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Accepted: 02/09/2019] [Indexed: 06/09/2023]
Abstract
The health of a eukaryotic cell depends on the proper functioning of its cell organelles. Characterizing these nanometer- to micrometer-scaled specialized subunits without disturbing the cell is challenging but can also provide valuable insights regarding the state of a cell. We show that objective-based scanning surface plasmon resonance microscopy can be used to analyze the refractive index of cell organelles quantitatively in a noninvasive and label-free manner with a lateral resolution at the diffraction limit.
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16
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Long-Range Surface Plasmon-Polariton Waveguide Biosensors for Human Cardiac Troponin I Detection. SENSORS 2019; 19:s19030631. [PMID: 30717341 PMCID: PMC6386922 DOI: 10.3390/s19030631] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 01/25/2019] [Accepted: 01/29/2019] [Indexed: 11/17/2022]
Abstract
Straight long-range surface plasmon-polariton (LRSPP) waveguides as biosensors for label-free detection are discussed. The sensors consist of 5-μm-wide 35-nm-thick gold stripes embedded in a low-index optical-grade fluoropolymer (CYTOPTM) with fluidic channels etched to the Au surface of the stripes. This work demonstrates the application of the LRSPP biosensors for the detection of human cardiac troponin I (cTnI) protein. cTnI is a biological marker for acute myocardial infarction (AMI), often referred to as a heart attack, which can be diagnosed by elevated levels of cTnI in patient blood. Direct and sandwich assays were developed and demonstrated over the concentration range from 1 to 1000 ng/mL, yielding detection limits of 430 pg/mL for the direct assay and 28 pg/mL for the sandwich assay (1 standard deviation), the latter being physiologically relevant to the early detection or onset of AMI. In addition, a novel approach for data analysis is proposed, where the analyte response is normalized to the response of the antibody layer.
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17
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Yang CT, Xu Y, Pourhassan-Moghaddam M, Tran DP, Wu L, Zhou X, Thierry B. Surface Plasmon Enhanced Light Scattering Biosensing: Size Dependence on the Gold Nanoparticle Tag. SENSORS (BASEL, SWITZERLAND) 2019; 19:E323. [PMID: 30650578 PMCID: PMC6359480 DOI: 10.3390/s19020323] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 01/11/2019] [Accepted: 01/11/2019] [Indexed: 12/31/2022]
Abstract
Surface plasmon enhanced light scattering (SP-LS) is a powerful new sensing SPR modality that yields excellent sensitivity in sandwich immunoassay using spherical gold nanoparticle (AuNP) tags. Towards further improving the performance of SP-LS, we systematically investigated the AuNP size effect. Simulation results indicated an AuNP size-dependent scattered power, and predicted the optimized AuNPs sizes (i.e., 100 and 130 nm) that afford extremely high signal enhancement in SP-LS. The maximum scattered power from a 130 nm AuNP is about 1700-fold higher than that obtained from a 17 nm AuNP. Experimentally, a bio-conjugation protocol was developed by coating the AuNPs with mixture of low and high molecular weight PEG molecules. Optimal IgG antibody bioconjugation conditions were identified using physicochemical characterization and a model dot-blot assay. Aggregation prevented the use of the larger AuNPs in SP-LS experiments. As predicted by simulation, AuNPs with diameters of 50 and 64 nm yielded significantly higher SP-LS signal enhancement in comparison to the smaller particles. Finally, we demonstrated the feasibility of a two-step SP-LS protocol based on a gold enhancement step, aimed at enlarging 36 nm AuNPs tags. This study provides a blue-print for the further development of SP-LS biosensing and its translation in the bioanalytical field.
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Affiliation(s)
- Chih-Tsung Yang
- Future Industries Institute and ARC Centre of Excellence in Convergent Bio and Nano Science and Technology, University of South Australia, Mawson Lakes Campus, Mawson Lakes 5095, Australia.
| | - Yi Xu
- Electronics and Photonics Department, Institute of High Performance Computing, Agency for Science, Technology, and Research (A*STAR), Singapore 138632, Singapore.
- SUTD-MIT International Design Center & Science and Math Cluster, Singapore University of Technology and Design, Singapore 487372, Singapore.
| | - Mohammad Pourhassan-Moghaddam
- School of Biomedical Engineering, University of Technology Sydney, Sydney 2007, Australia.
- Institute for Biomedical Materials and Devices (IBMD), Faculty of Science, University of Technology Sydney, Sydney, NSW 2007, Australia.
| | - Duy Phu Tran
- Future Industries Institute and ARC Centre of Excellence in Convergent Bio and Nano Science and Technology, University of South Australia, Mawson Lakes Campus, Mawson Lakes 5095, Australia.
| | - Lin Wu
- Electronics and Photonics Department, Institute of High Performance Computing, Agency for Science, Technology, and Research (A*STAR), Singapore 138632, Singapore.
| | - Xin Zhou
- Institute of Comparative Medicine, Yangzhou University, Yangzhou 225009, China.
| | - Benjamin Thierry
- Future Industries Institute and ARC Centre of Excellence in Convergent Bio and Nano Science and Technology, University of South Australia, Mawson Lakes Campus, Mawson Lakes 5095, Australia.
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18
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Filion-Côté S, Melaine F, Kirk AG, Tabrizian M. Monitoring of bacterial film formation and its breakdown with an angular-based surface plasmon resonance biosensor. Analyst 2018; 142:2386-2394. [PMID: 28555681 DOI: 10.1039/c7an00068e] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Bacterial biofilms are a leading cause of infection in health-care settings. Surface plasmon resonance (SPR) biosensors stand as valuable tools not only for the detection of biological entities and the characterisation of biomaterials but also as a suitable means to monitor bacterial film formation. This article reports on a proof-of-concept study for the use of an angular-based SPR biosensor for the monitoring of bacterial cell growth and biofilm formation and removal under the effect of different cleaning agents. The benefit of this custom-made SPR instrument is that it records simultaneously both the critical and resonant angles. This provides unique information on the growth of bacterial cells which is otherwise not obtainable with commonly used intensity-based SPR systems. The results clearly showed that a multilayer biofilm can be formed in 48 hours and the steps involved can be monitored in real-time with the SPR instrument through the measurement of the refractive index change and following the evolution in the shape of the SPR curve. The number, the depth and the sharpness of the reflection ripples varied as the film became thicker. Simulation results confirmed that the number of layers of bacteria affected the number of ripples at the critical angle. Real-time monitoring of the film breakdown with three cleaning agents indicated that bleach solution at 4.5% was the most effective in disrupting the biofilm from the gold sensor. Our overall findings suggest that the SPR biosensor with angular modulation presented in this article can perform real-time monitoring of biofilm formation and has the potential to be used as a platform to test the efficiency of disinfectants.
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Affiliation(s)
- Sandrine Filion-Côté
- The Photonic Systems Group, Dept. Electrical and Computer Engineering, McGill University, McConnell Engineering Building, Montréal, H3A 0E9, Canada
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19
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Modena MM, Chawla K, Misun PM, Hierlemann A. Smart Cell Culture Systems: Integration of Sensors and Actuators into Microphysiological Systems. ACS Chem Biol 2018; 13:1767-1784. [PMID: 29381325 PMCID: PMC5959007 DOI: 10.1021/acschembio.7b01029] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Technological advances in microfabrication techniques in combination with organotypic cell and tissue models have enabled the realization of microphysiological systems capable of recapitulating aspects of human physiology in vitro with great fidelity. Concurrently, a number of analysis techniques has been developed to probe and characterize these model systems. However, many assays are still performed off-line, which severely compromises the possibility of obtaining real-time information from the samples under examination, and which also limits the use of these platforms in high-throughput analysis. In this review, we focus on sensing and actuation schemes that have already been established or offer great potential to provide in situ detection or manipulation of relevant cell or tissue samples in microphysiological platforms. We will first describe methods that can be integrated in a straightforward way and that offer potential multiplexing and/or parallelization of sensing and actuation functions. These methods include electrical impedance spectroscopy, electrochemical biosensors, and the use of surface acoustic waves for manipulation and analysis of cells, tissue, and multicellular organisms. In the second part, we will describe two sensor approaches based on surface-plasmon resonance and mechanical resonators that have recently provided new characterization features for biological samples, although technological limitations for use in high-throughput applications still exist.
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Affiliation(s)
- Mario M. Modena
- ETH Zürich, Department of Biosystems Science and Engineering,
Bio Engineering Laboratory, Basel, Switzerland
| | - Ketki Chawla
- ETH Zürich, Department of Biosystems Science and Engineering,
Bio Engineering Laboratory, Basel, Switzerland
| | - Patrick M. Misun
- ETH Zürich, Department of Biosystems Science and Engineering,
Bio Engineering Laboratory, Basel, Switzerland
| | - Andreas Hierlemann
- ETH Zürich, Department of Biosystems Science and Engineering,
Bio Engineering Laboratory, Basel, Switzerland
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20
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Ahn H, Song H, Choi JR, Kim K. A Localized Surface Plasmon Resonance Sensor Using Double-Metal-Complex Nanostructures and a Review of Recent Approaches. SENSORS (BASEL, SWITZERLAND) 2017; 18:E98. [PMID: 29301238 PMCID: PMC5795798 DOI: 10.3390/s18010098] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 12/21/2017] [Accepted: 12/29/2017] [Indexed: 12/14/2022]
Abstract
From active developments and applications of various devices to acquire outside and inside information and to operate based on feedback from that information, the sensor market is growing rapidly. In accordance to this trend, the surface plasmon resonance (SPR) sensor, an optical sensor, has been actively developed for high-sensitivity real-time detection. In this study, the fundamentals of SPR sensors and recent approaches for enhancing sensing performance are reported. In the section on the fundamentals of SPR sensors, a brief description of surface plasmon phenomena, SPR, SPR-based sensing applications, and several configuration types of SPR sensors are introduced. In addition, advanced nanotechnology- and nanofabrication-based techniques for improving the sensing performance of SPR sensors are proposed: (1) localized SPR (LSPR) using nanostructures or nanoparticles; (2) long-range SPR (LRSPR); and (3) double-metal-layer SPR sensors for additional performance improvements. Consequently, a high-sensitivity, high-biocompatibility SPR sensor method is suggested. Moreover, we briefly describe issues (miniaturization and communication technology integration) for future SPR sensors.
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Affiliation(s)
- Heesang Ahn
- Department of Cogno-Mechatronics Engineering, Pusan National University, Busan 46241, Korea.
| | - Hyerin Song
- Department of Cogno-Mechatronics Engineering, Pusan National University, Busan 46241, Korea.
| | - Jong-Ryul Choi
- Medical Device Development Center, Daegu-Gyeongbuk Medical Innovation Foundation (DGMIF), Daegu 41061, Korea.
| | - Kyujung Kim
- Department of Cogno-Mechatronics Engineering, Pusan National University, Busan 46241, Korea.
- Department of Optics and Mechatronics Engineering, Pusan National University, Busan 46241, Korea.
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21
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Hou C, Galvan DD, Meng G, Yu Q. Long-range surface plasmon resonance and surface-enhanced Raman scattering on X-shaped gold plasmonic nanohole arrays. Phys Chem Chem Phys 2017; 19:24126-24134. [DOI: 10.1039/c7cp04564f] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
X-shaped gold plasmonic nanohole arrays embedded in refractive index-matched dielectric media are designed and optimized as a long-range SERS substrate.
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Affiliation(s)
- Chao Hou
- Department of Chemical Engineering
- University of Washington
- Seattle
- USA
- University of Science and Technology of China
| | | | - Guowen Meng
- Key Laboratory of Materials Physics
- and Anhui Key Laboratory of Nanomaterials and Nanotechnology
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei
| | - Qiuming Yu
- Department of Chemical Engineering
- University of Washington
- Seattle
- USA
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22
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Wang Y, Luo Z, Liu K, Wang J, Duan Y. In situ targeting TEM8 via immune response and polypeptide recognition by wavelength-modulated surface plasmon resonance biosensor. Sci Rep 2016; 6:20006. [PMID: 26822761 PMCID: PMC4731803 DOI: 10.1038/srep20006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Accepted: 12/22/2015] [Indexed: 12/12/2022] Open
Abstract
There is an increasing interest in real-time and in situ monitoring of living cell activities in life science and medicine. This paper reports a whole cell sensing protocol over the interface of Au film coupled in a wavelength-modulated surface plasmon resonance (WMSPR) biosensor. With dual parabolic mirrors integrated in the sensor, the compact and miniaturized instrument shows satisfactory refractive index sensitivity (2220 nm/RIU) and a high resolution of resonance wavelength shift of 0.3 nm to liquid samples. The affinity interactions between the biomarker of human tumor endothelial marker 8 (TEM8) and antibody (Ab) or specific polypeptide (PEP) were firstly introduced to WMSPR biosensor analysis. Both the interaction events of Ab-cell and PEP-cell over the Au film interface can be recognized by the sensor and the balance time of interactions is about 20 min. The concentration range of Ab for quantitative monitoring of the TEM8 expression on human colon carcinoma SW620 cells was investigated. The present low-cost and time-saving method provides a time resolution of binding specificity between Ab/PEP and TEM8 for real-time analysis of antigen on living tumor cell surface.
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Affiliation(s)
- Yimin Wang
- Research Center of Analytical Instrumentation, Key Laboratory of Bio-resource and Eco-environment, Ministry of Education, College of Life Science, Sichuan University, Chengdu 610065, PR China
| | - Zewei Luo
- Research Center of Analytical Instrumentation, Key Laboratory of Bio-resource and Eco-environment, Ministry of Education, College of Life Science, Sichuan University, Chengdu 610065, PR China
| | - Kunping Liu
- Research Center of Analytical Instrumentation, Key Laboratory of Bio-resource and Eco-environment, Ministry of Education, College of Life Science, Sichuan University, Chengdu 610065, PR China.,Faculty of biotechnology industry, Chengdu University, Chengdu, 610106, PR China
| | - Jie Wang
- School of Manufacturing Science and Engineering, Sichuan University, Chengdu, 610065, PR China
| | - Yixiang Duan
- Research Center of Analytical Instrumentation, Key Laboratory of Bio-resource and Eco-environment, Ministry of Education, College of Life Science, Sichuan University, Chengdu 610065, PR China
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23
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Das D, Shiladitya K, Biswas K, Dutta PK, Parekh A, Mandal M, Das S. Wavelet-based multiscale analysis of bioimpedance data measured by electric cell-substrate impedance sensing for classification of cancerous and normal cells. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2015; 92:062702. [PMID: 26764722 DOI: 10.1103/physreve.92.062702] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Indexed: 06/05/2023]
Abstract
The paper presents a study to differentiate normal and cancerous cells using label-free bioimpedance signal measured by electric cell-substrate impedance sensing. The real-time-measured bioimpedance data of human breast cancer cells and human epithelial normal cells employs fluctuations of impedance value due to cellular micromotions resulting from dynamic structural rearrangement of membrane protrusions under nonagitated condition. Here, a wavelet-based multiscale quantitative analysis technique has been applied to analyze the fluctuations in bioimpedance. The study demonstrates a method to classify cancerous and normal cells from the signature of their impedance fluctuations. The fluctuations associated with cellular micromotion are quantified in terms of cellular energy, cellular power dissipation, and cellular moments. The cellular energy and power dissipation are found higher for cancerous cells associated with higher micromotions in cancer cells. The initial study suggests that proposed wavelet-based quantitative technique promises to be an effective method to analyze real-time bioimpedance signal for distinguishing cancer and normal cells.
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Affiliation(s)
- Debanjan Das
- Department of Electrical Engineering, IIT Kharagpur, India
| | | | - Karabi Biswas
- Department of Electrical Engineering, IIT Kharagpur, India
| | | | - Aditya Parekh
- School of Medical Science and Technology, IIT Kharagpur, India
| | - Mahitosh Mandal
- School of Medical Science and Technology, IIT Kharagpur, India
| | - Soumen Das
- School of Medical Science and Technology, IIT Kharagpur, India
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24
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Chen T, Hong Y, Reinhard BM. Probing DNA Stiffness through Optical Fluctuation Analysis of Plasmon Rulers. NANO LETTERS 2015; 15:5349-57. [PMID: 26121062 PMCID: PMC4624404 DOI: 10.1021/acs.nanolett.5b01725] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The distance-dependent plasmon coupling between biopolymer tethered gold or silver nanoparticles forms the foundation for the so-called plasmon rulers. While conventional plasmon ruler applications focus on the detection of singular events in the far-field spectrum, we perform in this Letter a ratiometric analysis of the continuous spectral fluctuations arising from thermal interparticle separation variations in plasmon rulers confined to fluid lipid membranes. We characterized plasmon rulers with different DNA tethers and demonstrate the ability to detect and quantify differences in the plasmon ruler potential and tether stiffness. The influence of the nature of the tether (single-stranded versus double-stranded DNA) and the length of the tether is analyzed. The characterization of the continuous variation of the interparticle separation in individual plasmon rulers through optical fluctuation analysis provides additional information about the conformational flexibility of the tether molecule(s) located in the confinement of the deeply subdiffraction limit interparticle gap and enhances the versatility of plasmon rulers as a tool in Biophysics and Nanotechnology.
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Affiliation(s)
- Tianhong Chen
- Department of Chemistry and the Photonics Center, Boston University, Boston, MA 02215, United States
| | - Yan Hong
- Department of Chemistry and the Photonics Center, Boston University, Boston, MA 02215, United States
| | - Björn M. Reinhard
- Department of Chemistry and the Photonics Center, Boston University, Boston, MA 02215, United States
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