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Dai C, Jia H, Wu W, Yin B, Wang H, Wang L, Zhong Y, Wang Z, Zhang C, Yao J. Optically Triggering and Monitoring Single-Cell-Level Metabolism Using Ormosil-Decorated Ultrathin Fibers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:9844-9852. [PMID: 35926220 DOI: 10.1021/acs.langmuir.2c00915] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The integration of biological components and artificial devices requires a bio-machine interface that can simultaneously trigger and monitor the activities in biosystems. Herein, we use an organically modified silicate (ormosil) composite coating containing a light-responsive nanocapsule and a fluorescent bioprobe for reactive oxygen species (ROS) to decorate ultrathin optical fibers, namely, ormosil-decorated ultrathin fibers (OD-UFs), and demonstrate that these OD-UFs can optically trigger and monitor the intracellular metabolism activities in living cells. The sizes and shapes of UF tips were finely controlled to match the dimension and mechanical properties of living cells. The increased elasticity of the ormosil coating of OD-UFs reduces possible mechanical damage during the cell membrane penetration. The light-responsive nanocapsule was physically absorbed on the surface of the ormosil coating and could release a stimulant to trigger the metabolism activities in cells upon the guided laser through OD-UFs. The fluorescent bioprobe was covalently linked with the ormosil matrix for monitoring the intracellular ROS generation, which was verified by the in vitro experiments on the microdroplets of a hydrogen peroxide solution. Finally, we found that the living cells could maintain most of their viability after being inserted with OD-UFs, and the intracellular metabolism activities were successfully triggered and monitored at the single-cell level. The OD-UF provides a new platform for the investigation of intracellular behaviors for drug stimulations and represents a new proof of concept for a bio-machine interface based on the optical and chemical activities of organic functional molecules.
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Affiliation(s)
- Chenghu Dai
- Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- School of Integrated Circuits, Anhui University, Hefei 230601, China
| | - Hao Jia
- Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Wubin Wu
- Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Baipeng Yin
- Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hong Wang
- Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ling Wang
- Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yeteng Zhong
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing 100190, China
| | - Zihua Wang
- Fujian Provincial Key Laboratory of Brain Aging and Neurodegenerative Diseases, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, Fujian 350122, China
| | - Chuang Zhang
- Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Jiannian Yao
- Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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Wen Y, Xie D, Liu Z. Advances in protein analysis in single live cells: principle, instrumentation and applications. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116619] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Chen J, Wang J, Geng Y, Yue J, Shi W, Liang C, Xu W, Xu S. Single-Cell Oxidative Stress Events Revealed by a Renewable SERS Nanotip. ACS Sens 2021; 6:1663-1670. [PMID: 33784081 DOI: 10.1021/acssensors.1c00395] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A nanotip sensitive to reactive oxygen species (ROS) and NAD+/NADH (oxidized/reduced forms of nicotinamide adenine dinucleotide) was designed and prepared to identify the redox events in a single living cell by surface-enhanced Raman scattering (SERS) spectroscopy. The nanotips were prepared by the one-step laser-induced Ag growth and deposition. A redox-reversible Raman reporter, 4-mercaptophenol (4-MP), was employed for the nanotip decoration along with the Ag deposition. 4-MP can be converted to SERS-inactive 4-mercaptocyclohexa-2,5-dienone (4-MC) by Fe3+ ions to complete signal rezeroing for multiple oxidative stress event loops. The SERS signal conversion from 4-MC to 4-MP provides a cue for the reduction process that is NADH-dependent. In contrast, by the conversion from 4-MP to 4-MC, the oxidative stress events and the signal transduction mechanism of cells stimulated by drugs (phorbol 12-myristate 13-acetate and H2O2) can be explored by SERS. This sensor is easy to fabricate and can be recycled. This tip-typed SERS nanosensor can be extendedly available for tracing other key markers in other NAD+/NADH-mediated respiratory chain and glycolysis, e.g., lactic acid, pyruvic acid, adenosine triphosphate, and antioxidants. It will be useful for investigating the diseases of abnormal oxidative stress and mitochondrial metabolism at the single-cell level.
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Affiliation(s)
- Jiamin Chen
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130012, People’s Republic of China
| | - Jiaqi Wang
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130012, People’s Republic of China
| | - Yijia Geng
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130012, People’s Republic of China
| | - Jing Yue
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130012, People’s Republic of China
| | - Wei Shi
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences, Jilin University, Changchun 130012, People’s Republic of China
| | - Chongyang Liang
- Institute of Frontier Medical Science, Jilin University, Changchun 130021, People’s Republic of China
| | - Weiqing Xu
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130012, People’s Republic of China
| | - Shuping Xu
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130012, People’s Republic of China
- Department of Molecular Sciences, ARC Centre of Excellence for Nanoscale BioPhotonics (CNBP), Macquarie University, Sydney, New South Wales 2109, Australia
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Shen Y, Yue J, Xu W, Xu S. Recent progress of surface-enhanced Raman spectroscopy for subcellular compartment analysis. Theranostics 2021; 11:4872-4893. [PMID: 33754033 PMCID: PMC7978302 DOI: 10.7150/thno.56409] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Accepted: 01/25/2021] [Indexed: 12/14/2022] Open
Abstract
Organelles are involved in many cell life activities, and their metabolic or functional disorders are closely related to apoptosis, neurodegenerative diseases, cardiovascular diseases, and the development and metastasis of cancers. The explorations of subcellular structures, microenvironments, and their abnormal conditions are conducive to a deeper understanding of many pathological mechanisms, which are expected to achieve the early diagnosis and the effective therapy of diseases. Organelles are also the targeted locations of drugs, and they play significant roles in many targeting therapeutic strategies. Surface-enhanced Raman spectroscopy (SERS) is a powerful analytical tool that can provide the molecular fingerprint information of subcellular compartments and the real-time cellular dynamics in a non-invasive and non-destructive way. This review aims to summarize the recent advances of SERS studies on subcellular compartments, including five parts. The introductions of SERS and subcellular compartments are given. SERS is promising in subcellular compartment studies due to its molecular specificity and high sensitivity, and both of which highly match the high demands of cellular/subcellular investigations. Intracellular SERS is mainly cataloged as the labeling and label-free methods. For subcellular targeted detections and therapies, how to internalize plasmonic nanoparticles or nanostructure in the target locations is a key point. The subcellular compartment SERS detections, SERS measurements of isolated organelles, investigations of therapeutic mechanisms from subcellular compartments and microenvironments, and integration of SERS diagnosis and treatment are sequentially presented. A perspective view of the subcellular SERS studies is discussed from six aspects. This review provides a comprehensive overview of SERS applications in subcellular compartment researches, which will be a useful reference for designing the SERS-involved therapeutic systems.
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Affiliation(s)
- Yanting Shen
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China
- School of Pharmaceutical Sciences, Key Laboratory of Innovative Drug Development and Evaluation, Hebei Medical University, Shijiazhuang, 050017, China
| | - Jing Yue
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China
| | - Weiqing Xu
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China
| | - Shuping Xu
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China
- Department of Molecular Sciences, ARC Centre of Excellence for Nanoscale BioPhotonics (CNBP), Macquarie University, Sydney, New South Wales 2109, Australia
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Manimaran K, Murugesan S, Ragavendran C, Balasubramani G, Natarajan D, Ganesan A, Seedevi P. Biosynthesis of TiO2 Nanoparticles Using Edible Mushroom (Pleurotus djamor) Extract: Mosquito Larvicidal, Histopathological, Antibacterial and Anticancer Effect. J CLUST SCI 2020. [DOI: 10.1007/s10876-020-01888-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Zhang J, Gonzalez Y, Sany R, Ruediger A. A facile fabrication procedure for platinum nanoprobes with high-aspect-ratio and low tip radii via electrochemical etching. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2020; 91:033702. [PMID: 32259920 DOI: 10.1063/1.5128653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 12/22/2019] [Indexed: 06/11/2023]
Abstract
Herein, we propose a facile fabrication procedure for platinum (Pt) nanoprobes. Our approach consists in performing a one-step electrochemical etching using a mixture of DI water, acetone, and CaCl2. Our technique is self-terminated and thus does not necessitate a cut-off circuit nor other sophisticated equipment or set-up commonly used in the fabrication process of Pt nanoprobes. The Pt nanoprobes thereby manufactured demonstrate small tip radii, a high aspect-ratio, no detectable surface contamination, and good reproducibility.
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Affiliation(s)
- J Zhang
- Centre Énergie Matériaux Télécommunications, Institut National de la Recherche Scientifique (INRS-EMT), Université du Québec, 1650, Blvd. Lionel-Boulet, Varennes, Québec J3X 1S2, Canada
| | - Y Gonzalez
- Centre Énergie Matériaux Télécommunications, Institut National de la Recherche Scientifique (INRS-EMT), Université du Québec, 1650, Blvd. Lionel-Boulet, Varennes, Québec J3X 1S2, Canada
| | - R Sany
- CESI, Toulouse, 16 Rue Magellan, 31670 Labège, France
| | - A Ruediger
- Centre Énergie Matériaux Télécommunications, Institut National de la Recherche Scientifique (INRS-EMT), Université du Québec, 1650, Blvd. Lionel-Boulet, Varennes, Québec J3X 1S2, Canada
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7
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Optical Properties of Buffers and Cell Culture Media for Optofluidic and Sensing Applications. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9061145] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Interactions between light and various cells in cultures, such as bacteria or mammalian cells, are widely applied for optical sensors and optofluidic systems. These microorganisms need to be kept in proper aqueous media, referred to as buffers or cell culture media, that are required, respectively, for stable storage or delivering biochemical nutrients for their growth. When experiments or numerical analyses on optical devices are performed, the properties of these media are usually considered to be similar to those of pure water, with negligible influence of biochemical compounds on the medium’s optical properties. In this work, we investigated the transmission, material dispersion, and scattering properties of selected and widely used buffers and cell culture media. We show that the optical properties of these media may significantly vary from those of water. Well-defined properties of buffers and cell culture media are essential for proper design of various optical sensing or future optofluidic systems dealing with biological structures.
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8
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Optical fiber tips for biological applications: From light confinement, biosensing to bioparticles manipulation. Biochim Biophys Acta Gen Subj 2018; 1862:1209-1246. [DOI: 10.1016/j.bbagen.2018.02.008] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 01/26/2018] [Accepted: 02/13/2018] [Indexed: 12/15/2022]
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9
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Chen S, Yang Q, Xiao H, Shi H, Ma Y. Local pH Monitoring of Small Cluster of Cells using a Fiber-Optic Dual-Core Micro-Probe. SENSORS AND ACTUATORS. B, CHEMICAL 2017; 241:398-405. [PMID: 28533632 PMCID: PMC5438087 DOI: 10.1016/j.snb.2016.10.079] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Biological studies of tissues and cells have enabled numerous discoveries, but these studies still bear potential risks of invalidation because of cell heterogeneity. Through high-accuracy techniques, recent studies have demonstrated that discrepancies do exist between the results from low-number-cell studies and cell-population-based results. Thus the urgent need to re-evaluate key principles on limited number of cells has been provoked. In this study, a novel designed dual-core fiber-optic pH micro-probe was fabricated and demonstrated for niche environment pH sensing with high spatial resolution. An organic-modified silicate (OrMoSils) sol-gel thin layer was functionalized by entrapping a pH indicator, 2', 7'-Bis (2-carbonylethyl)-5(6)-carboxyfluorescein (BCECF), on a ~70 μm sized probe tip. Good linear correlation between fluorescence ratio of I560 nm/I640 nm and intercellular pH values was obtained within a biological-relevant pH range from 6.20 to 7.92 (R2 = 0.9834), and with a pH resolution of 0.035 ± 0.005 pH units. The probe's horizontal spatial resolution was demonstrated to be less than 2mm. Moreover, the probe was evaluated by measuring the localized extracellular pH changes of cultured human lung cancer cells (A549) when exposed to titanium dioxide nanoparticles (TiO2 NPs). Results showed that the probe has superior capability for fast, local, and continual monitoring of a small cluster of cells, which provides researchers a fast and accurate technique to conduct local pH measurements for cell heterogeneity-related studies.
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Affiliation(s)
- Sisi Chen
- Department of Chemistry, Missouri University of Science and Technology, Rolla, MO, 65409, USA
- Center for Single Nanoparticle, Single Cell, and Single Molecule Monitoring, Missouri University of Science and Technology, Rolla, MO, 65409, USA
| | - Qingbo Yang
- Department of Chemistry, Missouri University of Science and Technology, Rolla, MO, 65409, USA
- Center for Single Nanoparticle, Single Cell, and Single Molecule Monitoring, Missouri University of Science and Technology, Rolla, MO, 65409, USA
| | - Hai Xiao
- Department of Electrical and Computer Engineering, Clemson University, Clemson, SC, 29634, USA
- Center for Single Nanoparticle, Single Cell, and Single Molecule Monitoring, Missouri University of Science and Technology, Rolla, MO, 65409, USA
| | - Honglan Shi
- Department of Chemistry, Missouri University of Science and Technology, Rolla, MO, 65409, USA
- Center for Single Nanoparticle, Single Cell, and Single Molecule Monitoring, Missouri University of Science and Technology, Rolla, MO, 65409, USA
| | - Yinfa Ma
- Department of Chemistry, Missouri University of Science and Technology, Rolla, MO, 65409, USA
- Center for Single Nanoparticle, Single Cell, and Single Molecule Monitoring, Missouri University of Science and Technology, Rolla, MO, 65409, USA
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10
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Martan T, Nemecek T, Komanec M, Ahmad R, Zvanovec S. Refractometric detection of liquids using tapered optical fiber and suspended core microstructured fiber: a comparison of methods. APPLIED OPTICS 2017; 56:2388-2396. [PMID: 28375342 DOI: 10.1364/ao.56.002388] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Detecting explosive, flammable, or toxic industrial liquids reliably and accurately is a matter of civic responsibility that cannot be treated lightly. Tapered optical fibers (TOFs) and suspended core microstructured optical fibers (SC MOFs) were separately used as sensors of liquids without being compared to each other. We present a highly sensitive time-stable TOF sensor incorporated in the pipeline system for the in-line regime of measurement. This paper is furthermore focused on the comparison of this TOF and SC MOF of similar parameters for the detection of selected liquids. A validated method that incorporates TOF and SC MOF of small core (waist) diameter for refractometric detection is presented. The principle of detection is based on the overlap of an enhanced evanescent wave with a liquid analyte that either fills the cladding holes of the SC MOF or surrounds the waist area of the TOF. Optical power within the evanescent wave for both sensing structures and selected liquid analytes is analyzed. Measurement results concerning TOF and SC MOF are compared. Calculations to ascertain the limit of detection (LOD) for each sensor and the sensitivity (S) to refractive indices of liquid analytes in the range of 1.4269 to 1.4361 were performed at a wavelength of 1550 nm with the lowest refractive index step of 0.0007. Results affirming that S=600.96 dB/RIU and LOD=0.0733 RIU for the SC MOF and S=1143.2 dB/RIU and LOD of 0.0026 RIU for the TOF sensor were achieved, clearly illustrating that TOF-based sensors can reach close to two times greater sensitivity and 30 times higher limit of detection. This paper extends the comparison of the fiber sensors by discussing the potential applications.
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11
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Altunbek M, Kuku G, Culha M. Gold Nanoparticles in Single-Cell Analysis for Surface Enhanced Raman Scattering. Molecules 2016; 21:E1617. [PMID: 27897986 PMCID: PMC6273107 DOI: 10.3390/molecules21121617] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 11/17/2016] [Accepted: 11/22/2016] [Indexed: 01/24/2023] Open
Abstract
The need for new therapeutic approaches in the treatment of challenging diseases such as cancer, which often consists of a highly heterogeneous and complex population of cells, brought up the idea of analyzing single cells. The development of novel techniques to analyze single cells has been intensively studied to fully understand specific alternations inducing abnormalities in cellular function. One of the techniques used for single cell analysis is surface-enhanced Raman spectroscopy (SERS) in which a noble metal nanoparticle is used to enhance Raman scattering. Due to its low toxicity and biocompatibility, gold nanoparticles (AuNPs) are commonly preferred as SERS substrates in single cell analysis. The intracellular uptake, localization and toxicity issues of AuNPs are the critical points for interpretation of data since the obtained SERS signals originate from molecules in close vicinity to AuNPs that are taken up by the cells. In this review, the AuNP-living cell interactions, cellular uptake and toxicity of AuNPs in relation to their physicochemical properties, and surface-enhanced Raman scattering from single cells are discussed.
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Affiliation(s)
- Mine Altunbek
- Department of Genetics and Bioengineering, Faculty of Engineering, Yeditepe University, Atasehir, Istanbul 34755, Turkey.
| | - Gamze Kuku
- Department of Genetics and Bioengineering, Faculty of Engineering, Yeditepe University, Atasehir, Istanbul 34755, Turkey.
| | - Mustafa Culha
- Department of Genetics and Bioengineering, Faculty of Engineering, Yeditepe University, Atasehir, Istanbul 34755, Turkey.
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Liang F, Zhang Y, Hong W, Dong Y, Xie Z, Quan Q. Direct Tracking of Amyloid and Tu Dynamics in Neuroblastoma Cells Using Nanoplasmonic Fiber Tip Probes. NANO LETTERS 2016; 16:3989-94. [PMID: 27266855 PMCID: PMC5145310 DOI: 10.1021/acs.nanolett.6b00320] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Amyloid plaques and neurofibrillary tangles are the pathological hallmarks of Alzheimer's disease. However, there has been a long-standing discussion on the dynamic relations between Aβ and tau proteins, partially due to the lack of a tool to track protein dynamics in individual live neurons at the early stage of Aβ generation and tau phosphorylation. Here, we developed nanoplasmonic fiber tip probe (nFTP) technology to simultaneously monitor Aβ42 generation and tau phosphorylation (at serine 262) in living, single neuroblastoma cells over 12 h. We observed that Aβ42 generation, under clinically relevant anesthetic treatment, preceded tau phosphorylation, which then facilitated Aβ42 generation. This observation is also supported by measuring proteins in cell lysates using the ultrasensitive label-free photonic crystal nanosensors. nFTP therefore provides an advanced method to investigate protein expression and post-translational modification in live cells and determine outcomes of intervention of Alzheimer's disease and other neurodegenerative disorders.
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Affiliation(s)
- Feng Liang
- Rowland Institute at Harvard University, Cambridge, Massachusetts 02142, United States
| | - Yiying Zhang
- Geriatric Anesthesia Research Unit, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Charlestown, Massachusetts 02129, United States
| | - Wooyoung Hong
- Rowland Institute at Harvard University, Cambridge, Massachusetts 02142, United States
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Yuanlin Dong
- Geriatric Anesthesia Research Unit, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Charlestown, Massachusetts 02129, United States
| | - Zhongcong Xie
- Geriatric Anesthesia Research Unit, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Charlestown, Massachusetts 02129, United States
- Corresponding Authors (Q.Q). (Z.X)
| | - Qimin Quan
- Rowland Institute at Harvard University, Cambridge, Massachusetts 02142, United States
- Corresponding Authors (Q.Q). (Z.X)
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Thomas A, Heinemann L, Ramírez A, Zehe A. Options for the Development of Noninvasive Glucose Monitoring: Is Nanotechnology an Option to Break the Boundaries? J Diabetes Sci Technol 2016; 10:782-9. [PMID: 26581879 PMCID: PMC5038528 DOI: 10.1177/1932296815616133] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Nowadays nanotechnology has many applications in products used in various areas of daily life; however, this technology has also an option in modern medicine and pharmacy. Therefore, this technology is also an attractive option for the field of diagnosis and treatment of diabetes. Many people with diabetes measure their blood glucose levels regularly to determine the insulin dose. Ideally glucose values would be measured noninvasively (NI). However, none of all the NI approaches studied in the past decades enabled reliable NI measurements under all daily life conditions. Particularly an unfavorable signal-to-noise ratio turned out to be problematic. Based on the known physical possibilities for NI glucose monitoring the focus of this review is on nanotechnology approaches. Functional prototypes exist for some of these that showed promising results under defined laboratory conditions, indicating a good sensitivity and selectivity for glucose. On the second hand is to optimize the technological process of manufacturing. In view of the rapid progress in micro- and nanoelectronics hopefully NI glucose monitoring systems can be developed in the near future.
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Affiliation(s)
| | | | - Araceli Ramírez
- Laboratorio de Nanotrónica, Benemérita Universidad Autónoma de Puebla (BUAP), Ciudad Universitaria, Puebla, México
| | - Alfred Zehe
- Laboratorio de Nanotrónica, Benemérita Universidad Autónoma de Puebla (BUAP), Ciudad Universitaria, Puebla, México
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Zeidan E, Kepley CL, Sayes C, Sandros MG. Surface plasmon resonance: a label-free tool for cellular analysis. Nanomedicine (Lond) 2016; 10:1833-46. [PMID: 26080702 DOI: 10.2217/nnm.15.31] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Surface plasmon resonance (SPR) is a popular technique that allows for sensitive, specific, label-free and real-time assessment of biomolecular interactions. SPR is a nondestructive, modular and flexible tool for various applications in biomedical sciences ranging from cell sorting, cell surface characterization and drug discovery. In this review, we will discuss more specifically how SPR is used to monitor the dynamics of various types of cellular binding events and morphological adherence changes in response to external stimuli.
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Affiliation(s)
- Effat Zeidan
- University of North Carolina at Greensboro, Department of Nanoscience, 2907 E Lee Street, Greensboro, NC, 27401, USA
| | - Christopher L Kepley
- University of North Carolina at Greensboro, Department of Nanoscience, 2907 E Lee Street, Greensboro, NC, 27401, USA
| | - Christie Sayes
- University of North Carolina at Greensboro, Department of Nanoscience, 2907 E Lee Street, Greensboro, NC, 27401, USA
| | - Marinella G Sandros
- University of North Carolina at Greensboro, Department of Nanoscience, 2907 E Lee Street, Greensboro, NC, 27401, USA
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15
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Dumitru L, Irimia-Vladu M, Sariciftci N. Biocompatible Integration of Electronics Into Food Sensors. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/bs.coac.2016.04.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
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16
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Pospíšilová M, Kuncová G, Trögl J. Fiber-Optic Chemical Sensors and Fiber-Optic Bio-Sensors. SENSORS (BASEL, SWITZERLAND) 2015; 15:25208-59. [PMID: 26437407 PMCID: PMC4634516 DOI: 10.3390/s151025208] [Citation(s) in RCA: 126] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2015] [Revised: 09/08/2015] [Accepted: 09/14/2015] [Indexed: 02/06/2023]
Abstract
This review summarizes principles and current stage of development of fiber-optic chemical sensors (FOCS) and biosensors (FOBS). Fiber optic sensor (FOS) systems use the ability of optical fibers (OF) to guide the light in the spectral range from ultraviolet (UV) (180 nm) up to middle infrared (IR) (10 μm) and modulation of guided light by the parameters of the surrounding environment of the OF core. The introduction of OF in the sensor systems has brought advantages such as measurement in flammable and explosive environments, immunity to electrical noises, miniaturization, geometrical flexibility, measurement of small sample volumes, remote sensing in inaccessible sites or harsh environments and multi-sensing. The review comprises briefly the theory of OF elaborated for sensors, techniques of fabrications and analytical results reached with fiber-optic chemical and biological sensors.
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Affiliation(s)
- Marie Pospíšilová
- Czech Technical University, Faculty of Biomedical Engeneering, Nám. Sítná 3105, 27201 Kladno, Czech Republic.
| | - Gabriela Kuncová
- Institute of Chemical Process Fundamentals, ASCR, Rozvojová 135, 16500 Prague, Czech Republic.
| | - Josef Trögl
- Faculty of Environment, Jan Evangelista Purkyně University in Ústí nad Labem, KrálovaVýšina 3132/7, 40096 Ústí nad Labem, Czech Republic.
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Optical fiber nanotips coated with molecular beacons for DNA detection. SENSORS 2015; 15:9666-80. [PMID: 25919369 PMCID: PMC4481987 DOI: 10.3390/s150509666] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Revised: 04/02/2015] [Accepted: 04/20/2015] [Indexed: 12/20/2022]
Abstract
Optical fiber sensors, thanks to their compactness, fast response and real-time measurements, have a large impact in the fields of life science research, drug discovery and medical diagnostics. In recent years, advances in nanotechnology have resulted in the development of nanotools, capable of entering the single cell, resulting in new nanobiosensors useful for the detection of biomolecules inside living cells. In this paper, we provide an application of a nanotip coupled with molecular beacons (MBs) for the detection of DNA. The MBs were characterized by hybridization studies with a complementary target to prove their functionality both free in solution and immobilized onto a solid support. The solid support chosen as substrate for the immobilization of the MBs was a 30 nm tapered tip of an optical fiber, fabricated by chemical etching. With this set-up promising results were obtained and a limit of detection (LOD) of 0.57 nM was reached, opening up the possibility of using the proposed nanotip to detect mRNAs inside the cytoplasm of living cells.
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18
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Yang Q, Wang H, Lan X, Cheng B, Chen S, Shi H, Xiao H, Ma Y. Reflection-mode micro-spherical fiber-optic probes for in vitro real-time and single-cell level pH sensing. SENSORS AND ACTUATORS. B, CHEMICAL 2015; 207:571-580. [PMID: 25530670 PMCID: PMC4267056 DOI: 10.1016/j.snb.2014.10.107] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
pH sensing at the single-cell level without negatively affecting living cells is very important but still a remaining issue in the biomedical studies. A 70 μm reflection-mode fiber-optic micro-pH sensor was designed and fabricated by dip-coating thin layer of organically modified aerogel onto a tapered spherical probe head. A pH sensitive fluorescent dye 2', 7'-Bis (2-carbonylethyl)-5(6)-carboxyfluorescein (BCECF) was employed and covalently bonded within the aerogel networks. By tuning the alkoxide mixing ratio and adjusting hexamethyldisilazane (HMDS) priming procedure, the sensor can be optimized to have high stability and pH sensing ability. The in vitro real-time sensing capability was then demonstrated in a simple spectroscopic way, and showed linear measurement responses with a pH resolution up to an average of 0.049 pH unit within a narrow, but biological meaningful pH range of 6.12-7.81. Its novel characterizations of high spatial resolution, reflection mode operation, fast response and high stability, great linear response within biological meaningful pH range and high pH resolutions, make this novel pH probe a very cost-effective tool for chemical/biological sensing, especially within the single cell level research field.
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Affiliation(s)
- Qingbo Yang
- Department of Chemistry, Missouri University of Science and Technology, Rolla, MO 65409, USA
- Center of Biological Science and Engineering, Research Center, Missouri University of Science and Technology, Rolla, MO 65409, USA
| | - Hanzheng Wang
- Department of Electrical and Computer Engineering, Clemson University, Clemson, SC 29634, USA
| | - Xinwei Lan
- Department of Electrical and Computer Engineering, Clemson University, Clemson, SC 29634, USA
| | - Baokai Cheng
- Department of Electrical and Computer Engineering, Clemson University, Clemson, SC 29634, USA
| | - Sisi Chen
- Department of Chemistry, Missouri University of Science and Technology, Rolla, MO 65409, USA
- Center of Biological Science and Engineering, Research Center, Missouri University of Science and Technology, Rolla, MO 65409, USA
| | - Honglan Shi
- Department of Chemistry, Missouri University of Science and Technology, Rolla, MO 65409, USA
- Center of Biological Science and Engineering, Research Center, Missouri University of Science and Technology, Rolla, MO 65409, USA
| | - Hai Xiao
- Department of Electrical and Computer Engineering, Clemson University, Clemson, SC 29634, USA
| | - Yinfa Ma
- Department of Chemistry, Missouri University of Science and Technology, Rolla, MO 65409, USA
- Center of Biological Science and Engineering, Research Center, Missouri University of Science and Technology, Rolla, MO 65409, USA
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19
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Abstract
In this paper, a novel high sensitive nanobiosensor based on the combination of F0F1-ATPase molecular motor and Φ100nm tapered optical fiber is described, which as we known has never been reported before. Since the tapered optical fiber tip is well matched with the F0F1-ATPase complex in size, a superb sensitivity is theoretically expected. Experimental results show that this nanobiosensor’s sensitivity is about 3.5 times higher than the result of the experiment conducted on a F0F1-ATPase modified ordinary Φ50μm multimode fiber biosensor. The detecting time could be decreased correspondingly. Therefore a cheap, high sensitivity ,fast response, single molecule detection of biomolecules such as epidemic viruses would be achievable using this tapered optical fiber-based F0F1-ATPase nanobiosensor.
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Hong W, Liang F, Schaak D, Loncar M, Quan Q. Nanoscale label-free bioprobes to detect intracellular proteins in single living cells. Sci Rep 2014; 4:6179. [PMID: 25154394 PMCID: PMC4143788 DOI: 10.1038/srep06179] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Accepted: 07/09/2014] [Indexed: 01/26/2023] Open
Abstract
Fluorescent labeling techniques have been widely used in live cell studies; however, the labeling processes can be laborious and challenging for use in non-transfectable cells, and labels can interfere with protein functions. While label-free biosensors have been realized by nanofabrication, a method to track intracellular protein dynamics in real-time, in situ and in living cells has not been found. Here we present the first demonstration of label-free detection of intracellular p53 protein dynamics through a nanoscale surface plasmon-polariton fiber-tip-probe (FTP).
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Affiliation(s)
- Wooyoung Hong
- 1] Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, USA [2] Rowland Institute at Harvard University, Cambridge, MA 02142, USA
| | - Feng Liang
- Rowland Institute at Harvard University, Cambridge, MA 02142, USA
| | - Diane Schaak
- Rowland Institute at Harvard University, Cambridge, MA 02142, USA
| | - Marko Loncar
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
| | - Qimin Quan
- Rowland Institute at Harvard University, Cambridge, MA 02142, USA
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21
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Lu G, De Keersmaecker H, Su L, Kenens B, Rocha S, Fron E, Chen C, Van Dorpe P, Mizuno H, Hofkens J, Hutchison JA, Uji-i H. Live-cell SERS endoscopy using plasmonic nanowire waveguides. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:5124-8. [PMID: 24866811 DOI: 10.1002/adma.201401237] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Revised: 04/30/2014] [Indexed: 05/22/2023]
Abstract
Live-cell surface-enhanced Raman spectroscopy (SERS) endoscopy is developed by using plasmonic nanowire waveguides as endoscopic probes. It is demonstrated that the probe insertion does not stress the cell. Opposed to conventional SERS endoscopy, with excitation at the hotspot within the cell, the remote excitation method yields low-background SERS spectra from specific cell compartments with minimal associated photodamage.
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Affiliation(s)
- Gang Lu
- KU Leuven, Departement Chemie, Celestijnenlaan 200G-F, B-3001, Heverlee, Belgium
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22
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ul Haque A, Chatni MR, Li G, Porterfield DM. Biochips and other microtechnologies for physiomics. Expert Rev Proteomics 2014; 4:553-63. [PMID: 17705712 DOI: 10.1586/14789450.4.4.553] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
This paper presents a review of microtechnologies relevant to applications in cellular physiology, including biochips, electrochemical sensors and optrodic sensing techniques. Microelectrodes have been the main tools for measuring cellular electrophysiology, oxygen, nitric oxide, neurotransmitters, pH and various ions. Optical fiber sensing methods, such as indicator-based optrodes, with fluorescence lifetime measurement, are now emerging as viable alternatives to electroanalytical chemistry. These new optrode techniques are possible because of recent advances in the optoelectronics industry and are comparably easier to miniaturize, have faster response times, do not consume the analyte and have lower operational costs. This review serves as a summary and predicts future trends for both electrochemical and optical luminescence lifetime sensing as components in lab-on-a-chip devices for physiological sensing.
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Affiliation(s)
- Aeraj ul Haque
- Purdue University, Department of Agricultural & Biological Engineering, Physiological Sensing Facility, Bindley Bioscience Research Center, West Lafayette, IN 47907, USA.
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Ladanov M, Cheemalapati S, Pyayt A. Optimization of light delivery by a nanowire-based single cell optical endoscope. OPTICS EXPRESS 2013; 21:28001-28009. [PMID: 24514313 DOI: 10.1364/oe.21.028001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Here we present a new design and FDTD simulations of light delivery by a nanowire-based intracellular endoscope. Nanowires can be used for minimally invasive and very local light delivery inside cells. One of the main challenges is coupling of light into the nanowire. We propose a new plasmonic coupler interface between cleaved optical fiber and a nanowire, and optimize light coupling efficiency and contrast.
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24
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Kašík I, Podrazký O, Mrázek J, Martan T, Matějec V, Hoyerová K, Kamínek M. In vivo optical detection of pH in microscopic tissue samples of Arabidopsis thaliana. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:4809-15. [PMID: 24094191 DOI: 10.1016/j.msec.2013.07.045] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Revised: 06/26/2013] [Accepted: 07/30/2013] [Indexed: 11/15/2022]
Abstract
Minimally invasive in vivo measurement of pH in microscopic biological samples of μm or μl size, e.g. plant cells, tissues and saps, may help to explain complex biological processes. Consequently, techniques to achieve such measurements are a focus of interest for botanists. This paper describes a technique for the in vivo measurement of pH in the range pH5.0 to pH7.8 in microscopic plant tissue samples of Arabidopsis thaliana based on a ratiometric fluorescence method using low-loss robust tapered fiber probes. For this purpose tapered fiber probes were prepared and coated with a detection layer containing ion-paired fluorescent pH-transducer 8-hydroxypyrene-1,3,6-trisulfonic acid trisodium salt (c-HPTS). A fluorescence ratiometric approach was employed based on excitation at 415 nm and 450 nm and on the comparison of the fluorescence response at 515 nm. The suitability of tapered fiber probes for local detection of pH between 5.0 and 7.8 was demonstrated. A pH sensitivity of 0.15 pH units was achieved within the pH ranges 5.0-5.9 and 7.1-7.8, and this was improved to 0.04 pH units within the pH range 5.9-7.1. Spatial resolution of the probes was better than 20 μm and a time response within 15-20s was achieved. Despite the minute dimensions of the tapered fiber probes the setup developed was relatively robust and compact in construction and performed reliably. It has been successfully employed for the in vivo local determination of pH of mechanically resistant plant tissues of A. thaliana of microscopic scale. The detection of momentary pH gradients across the intact plant seems to be a good tool for the determination of changes in pH in response to experimental treatments affecting for example enzyme activities, availability of mineral nutrients, hormonal control of plant development and plant responses to environmental cues.
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Affiliation(s)
- Ivan Kašík
- Institute of Photonics and Electronics, AS CR, v.v.i., Chaberska 57, Prague 8 182 51, Czech Republic.
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Vo-Dinh T, Scaffidi J, Gregas M, Zhang Y, Seewaldt V. Applications of fiber-optics-based nanosensors to drug discovery. Expert Opin Drug Discov 2013; 4:889-900. [PMID: 23496274 DOI: 10.1517/17460440903085112] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Fiber-optic nanosensors are fabricated by heating and pulling optical fibers to yield sub-micron diameter tips and have been used for in vitro analysis of individual living mammalian cells. Immobilization of bioreceptors (e.g., antibodies, peptides, DNA) selective to targeting analyte molecules of interest provides molecular specificity. Excitation light can be launched into the fiber, and the resulting evanescent field at the tip of the nanofiber can be used to excite target molecules bound to the bioreceptor molecules. The fluorescence or surface-enhanced Raman scattering produced by the analyte molecules is detected using an ultra-sensitive photodetector. OBJECTIVE This article provides an overview of the development and application of fiber-optic nanosensors for drug discovery. CONCLUSIONS The nanosensors provide minimally invasive tools to probe subcellular compartments inside single living cells for health effect studies (e.g., detection of benzopyrene adducts) and medical applications (e.g., monitoring of apoptosis in cells treated with anticancer drugs).
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Affiliation(s)
- Tuan Vo-Dinh
- Duke University, Fitzpatrick Institute for Photonics, 305 Teer Building, Box 90271, Durham, NC 27708, USA +1 919 660 8520 ; +1 919 613 9145 ;
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26
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Lee YEK, Kopelman R. Nanobiotechnology: checking out the insides of cells. NATURE NANOTECHNOLOGY 2012; 7:148-149. [PMID: 22388660 DOI: 10.1038/nnano.2012.25] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
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27
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Farajzadeh MA, Djozan D, Mogaddam MRA, Norouzi J. Determination of phthalate esters in cow milk samples using dispersive liquid-liquid microextraction coupled with gas chromatography followed by flame ionization and mass spectrometric detection. J Sep Sci 2012; 35:742-9. [PMID: 22271644 DOI: 10.1002/jssc.201100853] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2011] [Revised: 12/04/2011] [Accepted: 12/04/2011] [Indexed: 11/10/2022]
Abstract
A simple and economic method for the analysis of phthalate esters, dimethyl phthalate, diethyl phthalate, di-iso-butyl phthalate, di-n-butyl phthalate, and di-2-ethylhexyl phthalate in cow milk samples by means of gas chromatography-flame ionization detection and gas chromatography-mass spectrometry has been developed. In this work, NaCl and ACN were added to 5 mL of the milk sample as the salting out agent and extraction solvent, respectively. After manual shaking, the mixture was centrifuged. In the presence of NaCl, a two-phase system was formed: upper phase - acetonitrile containing phthalate esters -and lower phase - aqueous phase containing soluble compounds and the precipitated proteins. After the extraction of phthalate esters from milk, a portion of supernatant phase (acetonitrile) was removed, mixed with 1,2-dibromoethane at microliter level and injected by syringe into NaCl solution. After the extraction of the selected phthalate esters into 1,2-dibromoethane, phase separation was performed by centrifugation and the enriched analytes in the sedimented phase were determined by gas chromatography-flame ionization detection and gas chromatography-mass spectrometry. Under the optimum extraction conditions, low limits of detection and quantification between 1.5-3 and 2.5-11 ng/mL, respectively was observed. Enrichment factors were in the range of 397-499. The relative standard deviations for the extraction of 100 ng/mL of each phthalate ester were in the range of 3-4% (n = 6). Finally, some milk samples were successfully analyzed using the proposed method and two analytes, di-n-butyl phthalate and di-2-ethylhyxel phthalate, were determined in them in nanogram per milliliter level.
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Affiliation(s)
- Mir Ali Farajzadeh
- Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran.
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28
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Yan R, Park JH, Choi Y, Heo CJ, Yang SM, Lee LP, Yang P. Nanowire-based single-cell endoscopy. NATURE NANOTECHNOLOGY 2011; 7:191-6. [PMID: 22179570 DOI: 10.1038/nnano.2011.226] [Citation(s) in RCA: 188] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2011] [Accepted: 11/18/2011] [Indexed: 05/20/2023]
Abstract
One-dimensional smart probes based on nanowires and nanotubes that can safely penetrate the plasma membrane and enter biological cells are potentially useful in high-resolution and high-throughput gene and drug delivery, biosensing and single-cell electrophysiology. However, using such probes for optical communication across the cellular membrane at the subwavelength level remains limited. Here, we show that a nanowire waveguide attached to the tapered tip of an optical fibre can guide visible light into intracellular compartments of a living mammalian cell, and can also detect optical signals from subcellular regions with high spatial resolution. Furthermore, we show that through light-activated mechanisms the endoscope can deliver payloads into cells with spatial and temporal specificity. Moreover, insertion of the endoscope into cells and illumination of the guided laser did not induce any significant toxicity in the cells.
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Affiliation(s)
- Ruoxue Yan
- Department of Chemistry, University of California, and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
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29
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Zhang Y, Dhawan A, Vo-Dinh T. Design and Fabrication of Fiber-Optic Nanoprobes for Optical Sensing. NANOSCALE RESEARCH LETTERS 2011; 6:18. [PMID: 27502642 PMCID: PMC3211233 DOI: 10.1007/s11671-010-9744-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2010] [Accepted: 08/05/2010] [Indexed: 05/13/2023]
Abstract
This paper describes the design and fabrication of fiber-optic nanoprobes developed for optical detection in single living cells. It is critical to fabricate probes with well-controlled nanoapertures for optimized spatial resolution and optical transmission. The detection sensitivity of fiber-optic nanoprobe depends mainly on the extremely small excitation volume that is determined by the aperture sizes and penetration depths. We investigate the angle dependence of the aperture in shadow evaporation of the metal coating onto the tip wall. It was found that nanoaperture diameters of approximately 50 nm can be achieved using a 25° tilt angle. On the other hand, the aperture size is sensitive to the subtle change of the metal evaporation angle and could be blocked by irregular metal grains. Through focused ion beam (FIB) milling, optical nanoprobes with well-defined aperture size as small as 200 nm can be obtained. Finally, we illustrate the use of the nanoprobes by detecting a fluorescent species, benzo[a]pyrene tetrol (BPT), in single living cells. A quantitative estimation of the numbers of BPT molecules detected using fiber-optic nanoprobes for BPT solutions shows that the limit of detection was approximately 100 molecules.
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Affiliation(s)
- Yan Zhang
- Fitzpatrick Institute for Photonics, Duke University, Durham, NC, 27708, USA
- Department of Biomedical Engineering, Duke University, Durham, NC, 27708, USA
| | - Anuj Dhawan
- Fitzpatrick Institute for Photonics, Duke University, Durham, NC, 27708, USA
- Department of Biomedical Engineering, Duke University, Durham, NC, 27708, USA
| | - Tuan Vo-Dinh
- Fitzpatrick Institute for Photonics, Duke University, Durham, NC, 27708, USA.
- Department of Biomedical Engineering, Duke University, Durham, NC, 27708, USA.
- Department of Chemistry, Duke University, Durham, NC, 27708, USA.
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Abstract
In the past decade, the tendency to move from a global, one-size-fits-all treatment philosophy to personalized medicine is based, in part, on the nuanced differences and sub-classifications of disease states. Our knowledge of these varied states stems from not only the ability to diagnose, classify, and perform experiments on cell populations as a whole, but also from new technologies that allow interrogation of cell populations at the individual cell level. Such departures from conventional thinking are driven by the recognition that clonal cell populations have numerous activities that manifest as significant levels of non-genetic heterogeneity. Clonal populations by definition originate from a single genetic origin so are regarded as having a high level of homogeneity as compared to genetically distinct cell populations. However, analysis at the single cell level has revealed a different phenomenon; cells and organisms require an inherent level of non-genetic heterogeneity to function properly, and in some cases, to survive. The growing understanding of this occurrence has lead to the development of methods to monitor, analyze, and better characterize the heterogeneity in cell populations. Following the trend of DNA- and protein microarrays, platforms capable of simultaneously monitoring each cell in a population have been developed. These cellular microarray platforms and other related formats allow for continuous monitoring of single live cells and simultaneously generate individual cell and average population data that are more descriptive and information-rich than traditional bulk methods. These technological advances have helped develop a better understanding of the intricacies associated with biological processes and afforded greater insight into complex biological systems. The associated instruments, techniques, and reagents now allow for highly multiplexed analyses, which enable multiple cellular activities, processes, or pathways to be monitored simultaneously. This critical review will discuss the paradigm shift associated with cellular heterogeneity, speak to the key developments that have lead to our better understanding of systems biology, and detail the future directions of the discipline (281 references).
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Affiliation(s)
- Maureen A Walling
- Department of Chemistry, University at Albany, SUNY, 1400 Washington Ave., Albany, NY 12222, USA
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In vivo simultaneous intra- and extracellular potassium recordings using a micro-optrode. J Neurosci Methods 2010; 194:206-17. [PMID: 20951737 DOI: 10.1016/j.jneumeth.2010.10.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2010] [Revised: 09/28/2010] [Accepted: 10/07/2010] [Indexed: 01/30/2023]
Abstract
This technique proposes a new approach to correlate intra- and extracellular variations of the ionic concentrations in vivo by means of tapered optical waveguides coupled to standard electrophysiological electrodes to monitor in vivo simultaneously the intracellular and extracellular K(+) concentration as well as the neighboring field potential. The optical fibers were tapered to a final diameter of approximately 10 μm and were used to guide the excitation light deep into the tissue and to collect the fluorescence emanating from the intracellular milieu. This fiber was coupled to a double barrel ion-sensitive electrode forming a micro-optrode with a final diameter around 15 μm. The method was successfully used to record the intracellular K(+) evolution with the fluorescent indicator PBFI during three states: normal sleep-like patterns, paroxysmal seizures, and coma. While we could not disclose any phasic fluctuations of the intracellular K(+) during normal sleep patterns, they were clearly present during seizures and coma. In the majority of cases (58%), paroxysmal discharges were associated with positive variations of the intracellular fluorescence of 62±5% corresponding to extracellular K(+) increases of 2.04±0.4 mM. In the remaining cases (42%) intracellular K(+) dropped by 44.4±12% for an extracellular K(+) increase of 2.62±0.47 mM. We suggest that this differential behavior might reflect different cellular populations (glia vs. neurons, respectively). Comatose states were accompanied by an extracellular drop of K(+) of 1.31±0.13 mM, which was reflected, in all cases, by an intracellular K(+) increase of 39±4%.
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Fiber-optic pH detection in small volumes of biosamples. Anal Bioanal Chem 2010; 398:1883-9. [PMID: 20835818 DOI: 10.1007/s00216-010-4130-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2010] [Revised: 08/13/2010] [Accepted: 08/15/2010] [Indexed: 10/19/2022]
Abstract
Determining the pH values of microscopic plant samples may help to explain complex processes in plants, so it is an area of interest to botanists. Fiber-optic probes with small dimensions can be used for this purpose. This paper deals with the fiber-optic detection of the pH values of droplets of plant xylem exudate based on ratiometric fluorescence intensity measurements with an internal reference. For this purpose, novel V-taper sensing probes with a minimum diameter of around 8 μm were prepared that enable the delivery of fluorescence signal from the detection site on the taper tip to the detector. The taper tips were coated with pH-sensitive transducer (8-hydroxypyrene-1,3,6-trisulfonic acid trisodium salt; HPTS) and a reference [dichlorotris-(1,10-phenanthroline) ruthenium (II) hydrate (Ru-phen dichloride)] immobilized in a xerogel layer of propyltriethoxysilane and (3-glycidoxy)propyl trimethoxysilane. The prepared probes were sensitive to pH values mainly in the range from 6.0 to 9.0. In the pH range 6-9, the results were limited by measurement errors of about 0.2 pH units, and in the pH range 5-6 by measurement errors of about 0.5 pH units. Using the developed V-taper sensing probes, the pH values of in vivo and in vitro samples of small volumes (~6 μl) of exudate were measured. The results were validated by comparison with conventional electrochemical pH measurements.
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Vo‐Dinh T, Zhang Y. Single‐cell monitoring using fiberoptic nanosensors. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2010; 3:79-85. [DOI: 10.1002/wnan.112] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Tuan Vo‐Dinh
- Fitzpatrick Institute for Photonics, Departments of Biomedical Engineering and Chemistry, Duke University, Durham, NC, USA
| | - Yan Zhang
- Fitzpatrick Institute for Photonics, Departments of Biomedical Engineering and Chemistry, Duke University, Durham, NC, USA
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Mitik-Dineva N, Wang J, Truong VK, Stoddart PR, Alexander MR, Albutt DJ, Fluke C, Crawford RJ, Ivanova EP. Bacterial attachment on optical fibre surfaces. BIOFOULING 2010; 26:461-471. [PMID: 20358429 DOI: 10.1080/08927011003753399] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Optical fibres have received considerable attention as high-density sensor arrays suitable for both in vitro and in vivo measurements of biomolecules and biological processes in living organisms and/or nano-environments. The fibre surface was chemically modified by exposure to a selective etchant that preferentially erodes the fibre cores relative to the surrounding cladding material, thus producing a regular pattern of cylindrical wells of approximately 2.5 mum in diameter and 2.5 mum deep. The surface hydrophobicity of the etched and non-etched optical fibres was analysed using the sessile pico-drop method. The surface topography was characterised by atomic force microscopy (AFM), while the surface chemistry was probed by time-of-flight secondary ion mass spectrometry (ToF-SIMS). Six taxonomically different bacterial strains showed a consistent preference for attachment to the nano-scale smoother (R(q) = 273 nm), non-etched fibre surfaces (water contact angle, theta = 106 degrees +/- 4 degrees). In comparison, the surfaces of the etched optical fibres (water contact angle, theta = 96 degrees +/- 10 degrees) were not found to be amenable to bacterial attachment. Bacterial attachment on the non-etched optical fibre substrata varied among different strains.
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Affiliation(s)
- N Mitik-Dineva
- Faculty of Life and Social Sciences, Swinburne University of Technology, Hawthorn, Victoria, Australia
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Brient-Litzler E, Plückthun A, Bedouelle H. Knowledge-based design of reagentless fluorescent biosensors from a designed ankyrin repeat protein. Protein Eng Des Sel 2009; 23:229-41. [DOI: 10.1093/protein/gzp074] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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Elder JB, Hoh DJ, Oh BC, Heller AC, Liu CY, Apuzzo ML. THE FUTURE OF CEREBRAL SURGERY. Neurosurgery 2008; 62:1555-79; discussion 1579-82. [DOI: 10.1227/01.neu.0000333820.33143.0d] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Elder JB, Liu CY, Apuzzo MLJ. Neurosurgery in the realm of 10(-9), part 1: stardust and nanotechnology in neuroscience. Neurosurgery 2008; 62:1-20. [PMID: 18300888 DOI: 10.1227/01.neu.0000311058.80249.6b] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Nanotechnology as a science has evolved from notions and speculation to emerge as a prominent combination of science and engineering that stands to impact innumerable aspects of technology. Medicine in general and neurosurgery in particular will benefit greatly in terms of improved diagnostic and therapeutic capabilities. The recent explosion in nanotechnology products, including diverse applications such as beauty products and medical contrast agents, has been accompanied by an ever increasing volume of literature. Recent articles from our institution provided an historical and scientific background of nanotechnology, with a purposeful focus on nanomedicine. Future applications of nanotechnology to neuroscience and neurosurgery were briefly addressed. The present article is the first of two that will further this discussion by providing specific details of current nanotechnology applications and research related to neuroscience and clinical neurosurgery. This article also provides relevant perspective in scale, history, economics, and toxicology. Topics of specific importance to developments or advances of technologies used by neuroscientists and neurosurgeons are presented. In addition, advances in the field of microelectromechanical systems technology are discussed. Although larger than nanoscale, microelectromechanical systems technologies will play an important role in the future of medicine and neurosurgery. The second article will discuss current nanotechnologies that are being, or will be in the near future, incorporated into the armamentarium of the neurosurgeon. The goal of these articles is to keep the neuroscience community abreast of current developments in nanotechnology, nanomedicine, and, in particular, nanoneurosurgery, and to present possibilities for future applications of nanotechnology. As applications of nanotechnology permeate all forms of scientific and medical research, clinical applications will continue to emerge. Physicians of the present and future must take an active role in shaping the design and research of nanotechnologies to ensure maximal clinical relevance and patient benefit.
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Affiliation(s)
- James B Elder
- Department of Neurological Surgery, Keck School of Medicine, University of Southern California, Los Angeles, California 90033, USA.
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Martínez-Otero A, Evangelio E, Alibés R, Bourdelande JL, Ruiz-Molina D, Busqué F, Hernando J. Surface-structured molecular sensor for the optical detection of acidity. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:2963-2966. [PMID: 18315025 DOI: 10.1021/la704072z] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
In this letter, we report on the development of a surface molecular sensor for the detection of acidity. Lithographically controlled wetting deposition has been applied to form the nanostructure of a new fluorescent compound with three protonation states featuring different optical properties on a glass substrate. Atomic force microscopy demonstrates the functionalization of the surface with ordered arrays of the sensor molecules. The fluorescence properties of the resulting nanopattern at different pH values have been investigated by confocal fluorescene microsopy, thus revealing the fast, sensitive, reversible response of the prepared nanosensor to gas flows of varying acidity.
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Affiliation(s)
- Alberto Martínez-Otero
- Institut Català de Nanotecnologia, Esfera UAB, 08193 Cerdanyola del Vallès, Spain, Institut de Ciència de Materials de Barcelona (CSIC), 08193 Cerdanyola del Vallès, Spain
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Chopra N, Gavalas VG, Bachas LG, Hinds BJ, Bachas LG. Functional One‐Dimensional Nanomaterials: Applications in Nanoscale Biosensors. ANAL LETT 2007. [DOI: 10.1080/00032710701567170] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Piper JD, Clarke RW, Korchev YE, Ying L, Klenerman D. A Renewable Nanosensor Based on a Glass Nanopipette. J Am Chem Soc 2006; 128:16462-3. [PMID: 17177370 DOI: 10.1021/ja0650899] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A fluorescent nanosensor based on reporter dye molecules trapped in the tip of a nanopipette has been developed. This 100 nm sized nanosensor has been shown to be capable of measuring local pH and mapping sodium concentration with a temporal resolution of a few milliseconds.
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Affiliation(s)
- Joe D Piper
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
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Abstract
Cell transplantation to treat diseases characterised by tissue and cell dysfunction, ranging from diabetes to spinal cord injury, has made great strides preclinically and towards clinical efficacy. In order to enhance clinical outcomes, research needs to continue in areas including the development of a universal cell source that can be differentiated into specific cellular phenotypes, methods to protect the transplanted allogeneic or xenogeneic cells from rejection by the host immune system, techniques to enhance cellular integration of the transplant within the host tissue, strategies for in vivo detection and monitoring of the cellular implants, and new techniques to deliver genes to cells without eliciting a host immune response. Overcoming these obstacles will be of considerable benefit, as it allows understanding, visualising and controlling cellular interactions at a submicron level. Nanotechnology is a multidisciplinary field that allows us to manipulate materials, tissues, cells and DNA at the level of and within the individual cell. As such, nanotechnology may be well suited to optimise the generally encouraging results already achieved in cell transplantation. This review presents some of the ways that nanotechnology can directly contribute to cell transplantation.
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Affiliation(s)
- Craig Halberstadt
- Carolinas Medical Center, Department of General Surgery, Cannon Research Building, P.O. Box 32861, Charlotte, NC 28232-2861, USA.
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Affiliation(s)
- Otto S Wolfbeis
- Institute of Analytical Chemistry, University of Regensburg, D-93040 Regensburg, Germany
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