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Pileri T, Sinibaldi A, Occhicone A, Danz N, Giordani E, Allegretti M, Sonntag F, Munzert P, Giacomini P, Michelotti F. Direct competitive assay for HER2 detection in human plasma using Bloch surface wave-based biosensors. Anal Biochem 2024; 684:115374. [PMID: 37914005 DOI: 10.1016/j.ab.2023.115374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 10/13/2023] [Accepted: 10/29/2023] [Indexed: 11/03/2023]
Abstract
The overexpression and/or amplification of the HER2/neu oncogene has been proposed as a prognostic marker in breast cancer. The detection of the related peptide HER2 remains a grand challenge in cancer diagnosis and for therapeutic decision-making. Here, we used a biosensing device based on Bloch Surface Waves excited on a one-dimensional photonic crystal (1DPC) as valid alternative to standard techniques. The 1DPC was optimized to operate in the visible spectrum and the biosensor optics has been designed to combine label-free and fluorescence operation modes. This feature enables a real-time monitoring of a direct competitive assay using detection mAbs conjugated with quantum dots for an accurate discrimination in fluorescence mode between HER2-positive/negative human plasma samples. Such a competitive assay was implemented using patterned alternating areas where HER2-Fc chimera and reference molecules were bio-conjugated and monitored in a multiplexed way. By combining Label-Free and fluorescence detection analysis, we were able to tune the parameters of the assay and provide an HER2 detection in human plasma in less than 20 min, allowing for a cost-effective assay and rapid turnaround time. The proposed approach offers a promising technique capable of performing combined label-free and fluorescence detection for both diagnosis and therapeutic monitoring of diseases.
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Affiliation(s)
- Tommaso Pileri
- SAPIENZA Università di Roma, Department of Basic and Applied Sciences for Engineering, Via A. Scarpa, 16, 00161, Roma, Italy
| | - Alberto Sinibaldi
- SAPIENZA Università di Roma, Department of Basic and Applied Sciences for Engineering, Via A. Scarpa, 16, 00161, Roma, Italy; Center for Life Nano and Neuro Science, Italian Institute of Technology (IIT), Viale Regina Elena 291, 00161, Rome, Italy.
| | - Agostino Occhicone
- SAPIENZA Università di Roma, Department of Basic and Applied Sciences for Engineering, Via A. Scarpa, 16, 00161, Roma, Italy; Center for Life Nano and Neuro Science, Italian Institute of Technology (IIT), Viale Regina Elena 291, 00161, Rome, Italy
| | - Norbert Danz
- Fraunhofer Institute for Applied Optics and Precision Engineering, A.-Einstein-Str. 7, 07745, Jena, Germany
| | - Elena Giordani
- Translational Oncology Research Unit, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Matteo Allegretti
- Translational Oncology Research Unit, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Frank Sonntag
- Fraunhofer Institute for Material and Beam Technology IWS, Winterbergstr. 28, 01277, Dresden, Germany
| | - Peter Munzert
- Fraunhofer Institute for Applied Optics and Precision Engineering, A.-Einstein-Str. 7, 07745, Jena, Germany
| | - Patrizio Giacomini
- Translational Oncology Research Unit, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - Francesco Michelotti
- SAPIENZA Università di Roma, Department of Basic and Applied Sciences for Engineering, Via A. Scarpa, 16, 00161, Roma, Italy; Center for Life Nano and Neuro Science, Italian Institute of Technology (IIT), Viale Regina Elena 291, 00161, Rome, Italy
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2
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Nie Y, Sanna U, Sipola T, Kokkonen A, Päkkilä I, Sumen J, Rahkamaa-Tolonen K, Tkachenko V, Vespini V, Coppola S, Ferraro P, Grilli S, Ottevaere H. Miniaturized, high numerical aperture confocal fluorescence detection enhanced with pyroelectric droplet accumulation for sub-attomole analyte diagnosis. BIOMEDICAL OPTICS EXPRESS 2023; 14:6138-6150. [PMID: 38420309 PMCID: PMC10898570 DOI: 10.1364/boe.504757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 10/27/2023] [Accepted: 10/27/2023] [Indexed: 03/02/2024]
Abstract
To meet the growing demand for early fatal disease screening among large populations, current fluorescence detection instruments aiming at point-of-care diagnosis have the tendency to be low cost and high sensitivity, with a high potential for the analysis of low-volume, multiplex analytes with easy operation. In this work, we present the development of a miniaturized, high numerical aperture confocal fluorescence scanner for sub-micro-liter fluid diagnosis. It is enhanced with high-rate analyte accumulation using a pyroelectro-hydrodynamic dispensing system for generating tiny, stable sample droplets. The simplified confocal fluorescence scanner (numerical aperture 0.79, working distance 7.3 mm) uses merely off-the-shelf mass-production optical components. Experimental results show that it can achieve a high-sensitive, cost-efficient detection for sub-micro-liter, low-abundant (0.04 µL, 0.67 attomoles) fluid diagnosis, promising for point-of-care diagnosis.
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Affiliation(s)
- Yunfeng Nie
- Vrije Universiteit Brussel and Flanders Make, Brussel Photonics, Dept. of Applied Physics and Photonics, Pleinlaan 2, 1050 Brussels, Belgium
| | - Uusitalo Sanna
- VTT Technical Research Centre of Finland Ltd, Kaitoväylä 1, FI-90571 Oulu, Finland
| | - Teemu Sipola
- VTT Technical Research Centre of Finland Ltd, Kaitoväylä 1, FI-90571 Oulu, Finland
| | - Annukka Kokkonen
- VTT Technical Research Centre of Finland Ltd, Kaitoväylä 1, FI-90571 Oulu, Finland
| | - Inka Päkkilä
- VTT Technical Research Centre of Finland Ltd, Kaitoväylä 1, FI-90571 Oulu, Finland
| | - Juha Sumen
- VTT Technical Research Centre of Finland Ltd, Kaitoväylä 1, FI-90571 Oulu, Finland
| | | | - Volodymyr Tkachenko
- Institute of Applied Sciences and Intelligent Systems, National Council of Research (CNR-ISASI), Via Campi Flegrei 34, 80078 Pozzuoli, Italy
| | - Veronica Vespini
- Institute of Applied Sciences and Intelligent Systems, National Council of Research (CNR-ISASI), Via Campi Flegrei 34, 80078 Pozzuoli, Italy
| | - Sara Coppola
- Institute of Applied Sciences and Intelligent Systems, National Council of Research (CNR-ISASI), Via Campi Flegrei 34, 80078 Pozzuoli, Italy
| | - Pietro Ferraro
- Institute of Applied Sciences and Intelligent Systems, National Council of Research (CNR-ISASI), Via Campi Flegrei 34, 80078 Pozzuoli, Italy
| | - Simonetta Grilli
- Institute of Applied Sciences and Intelligent Systems, National Council of Research (CNR-ISASI), Via Campi Flegrei 34, 80078 Pozzuoli, Italy
| | - Heidi Ottevaere
- Vrije Universiteit Brussel and Flanders Make, Brussel Photonics, Dept. of Applied Physics and Photonics, Pleinlaan 2, 1050 Brussels, Belgium
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Xiang X, Song M, Xu X, Lu J, Chen Y, Chen S, He Y, Shang Y. Microfluidic Biosensor Integrated with Signal Transduction and Enhancement Mechanism for Ultrasensitive Noncompetitive Assay of Multiple Mycotoxins. Anal Chem 2023; 95:7993-8001. [PMID: 37156096 DOI: 10.1021/acs.analchem.3c00813] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
To achieve high-throughput ultrasensitive detection of mycotoxins in food, a functional DNA-guided transition-state CRISPR/Cas12a microfluidic biosensor (named FTMB) was successfully constructed. The signal transduction CRISPR/Cas12a strategy in FTMB has utilized DNA sequences with a specific recognition function and activators to form trigger switches. Meanwhile, the transition-state CRISPR/Cas12a system was constructed by adjusting the composition ratio of crRNA and activator to achieve a high response for low concentrations of target mycotoxins. On the other hand, the signal enhancement of FTMB has efficiently integrated the signal output of quantum dots (QDs) with the fluorescence enhancement effect of photonic crystals (PCs). The construction of universal QDs for the CRISPR/Cas12a system and PC films matching the photonic bandgap produced a significant signal enhancement by a factor of 45.6. Overall, FTMB exhibited a wide analytic range (10-5-101 ng·mL-1), low detection of limit (fg·mL-1), short detection period (∼40 min), high specificity, good precision (coefficients of variation <5%), and satisfactory practical sample analysis capacity (the consistency with HPLC at 88.76%-109.99%). It would provide a new and reliable solution for the rapid detection of multiple small molecules in the fields of clinical diagnosis and food safety.
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Affiliation(s)
- Xinran Xiang
- Jiangsu Key Laboratory for Food Safety & Nutrition Function Evaluation, Jiangsu Key Laboratory for Eco-Agricultural Biotechnology Around Hongze Lake, School of Life Science, Huaiyin Normal University, Huai'an 223300, China
| | - Minghui Song
- Jiangsu Key Laboratory for Food Safety & Nutrition Function Evaluation, Jiangsu Key Laboratory for Eco-Agricultural Biotechnology Around Hongze Lake, School of Life Science, Huaiyin Normal University, Huai'an 223300, China
| | - Xiaowei Xu
- Jiangsu Key Laboratory for Food Safety & Nutrition Function Evaluation, Jiangsu Key Laboratory for Eco-Agricultural Biotechnology Around Hongze Lake, School of Life Science, Huaiyin Normal University, Huai'an 223300, China
| | - Jiaran Lu
- Jiangsu Key Laboratory for Food Safety & Nutrition Function Evaluation, Jiangsu Key Laboratory for Eco-Agricultural Biotechnology Around Hongze Lake, School of Life Science, Huaiyin Normal University, Huai'an 223300, China
| | - Yuanyuan Chen
- Jiangsu Key Laboratory for Food Safety & Nutrition Function Evaluation, Jiangsu Key Laboratory for Eco-Agricultural Biotechnology Around Hongze Lake, School of Life Science, Huaiyin Normal University, Huai'an 223300, China
| | - Shuhan Chen
- Jiangsu Key Laboratory for Food Safety & Nutrition Function Evaluation, Jiangsu Key Laboratory for Eco-Agricultural Biotechnology Around Hongze Lake, School of Life Science, Huaiyin Normal University, Huai'an 223300, China
| | - Yinglong He
- Jiangsu Key Laboratory for Food Safety & Nutrition Function Evaluation, Jiangsu Key Laboratory for Eco-Agricultural Biotechnology Around Hongze Lake, School of Life Science, Huaiyin Normal University, Huai'an 223300, China
| | - Yuting Shang
- Jiangsu Key Laboratory for Food Safety & Nutrition Function Evaluation, Jiangsu Key Laboratory for Eco-Agricultural Biotechnology Around Hongze Lake, School of Life Science, Huaiyin Normal University, Huai'an 223300, China
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Liu B, Monshat H, Gu Z, Lu M, Zhao X. Recent advances in merging photonic crystals and plasmonics for bioanalytical applications. Analyst 2019; 143:2448-2458. [PMID: 29748684 DOI: 10.1039/c8an00144h] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Photonic crystals (PhCs) and plasmonic nanostructures offer the unprecedented capability to control the interaction of light and biomolecules at the nanoscale. Based on PhC and plasmonic phenomena, a variety of analytical techniques have been demonstrated and successfully implemented in many fields, such as biological sciences, clinical diagnosis, drug discovery, and environmental monitoring. During the past decades, PhC and plasmonic technologies have progressed in parallel with their pros and cons. The merging of photonic crystals with plasmonics will significantly improve biosensor performances and enlarge the linear detection range of analytical targets. Here, we review the state-of-the-art biosensors that combine PhC and plasmonic nanomaterials for quantitative analysis. The optical mechanisms of PhCs, plasmonic crystals, and metal nanoparticles (NPs) are presented, along with their integration and potential applications. By explaining the optical coupling of photonic crystals and plasmonics, the review manifests how PhC-plasmonic hybrid biosensors can achieve the advantages, including high sensitivity, low cost, and short assay time as well. The review also discusses the challenges and future opportunities in this fascinating field.
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Affiliation(s)
- Bing Liu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China.
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5
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Ma L, Le P, Kohli M, Smith AM. Nanomedicine in Cancer. Bioanalysis 2019. [DOI: 10.1007/978-3-030-01775-0_4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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6
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Ranjan R, Esimbekova EN, Kratasyuk VA. Rapid biosensing tools for cancer biomarkers. Biosens Bioelectron 2016; 87:918-930. [PMID: 27664412 DOI: 10.1016/j.bios.2016.09.061] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 09/06/2016] [Accepted: 09/17/2016] [Indexed: 12/14/2022]
Abstract
The present review critically discusses the latest developments in the field of smart diagnostic systems for cancer biomarkers. A wide coverage of recent biosensing approaches involving aptamers, enzymes, DNA probes, fluorescent probes, interacting proteins and antibodies in vicinity to transducers such as electrochemical, optical and piezoelectric is presented. Recent advanced developments in biosensing approaches for cancer biomarker owes much credit to functionalized nanomaterials due to their unique opto-electronic properties and enhanced surface to volume ratio. Biosensing methods for a plenty of cancer biomarkers has been summarized emphasizing the key principles involved.
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Affiliation(s)
- Rajeev Ranjan
- Laboratory of Bioluminescent Biotechnologies, Department of Biophysics, Institute of Fundamental Biology and Biotechnology, Siberian Federal University, 79 Svobodny prospect, Krasnoyarsk 660041, Russia
| | - Elena N Esimbekova
- Laboratory of Bioluminescent Biotechnologies, Department of Biophysics, Institute of Fundamental Biology and Biotechnology, Siberian Federal University, 79 Svobodny prospect, Krasnoyarsk 660041, Russia; Institute of Biophysics SB RAS, Akademgorodok 50/50, Krasnoyarsk 660036, Russia.
| | - Valentina A Kratasyuk
- Laboratory of Bioluminescent Biotechnologies, Department of Biophysics, Institute of Fundamental Biology and Biotechnology, Siberian Federal University, 79 Svobodny prospect, Krasnoyarsk 660041, Russia; Institute of Biophysics SB RAS, Akademgorodok 50/50, Krasnoyarsk 660036, Russia
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7
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Cunningham B, Zhang M, Zhuo Y, Kwon L, Race C. Recent Advances in Biosensing With Photonic Crystal Surfaces: A Review. IEEE SENSORS JOURNAL 2016; 16:3349-3366. [PMID: 27642265 PMCID: PMC5021450 DOI: 10.1109/jsen.2015.2429738] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Photonic crystal surfaces that are designed to function as wavelength-selective optical resonators have become a widely adopted platform for label-free biosensing, and for enhancement of the output of photon-emitting tags used throughout life science research and in vitro diagnostics. While some applications, such as analysis of drug-protein interactions, require extremely high resolution and the ability to accurately correct for measurement artifacts, others require sensitivity that is high enough for detection of disease biomarkers in serum with concentrations less than 1 pg/ml. As the analysis of cells becomes increasingly important for studying the behavior of stem cells, cancer cells, and biofilms under a variety of conditions, approaches that enable high resolution imaging of live cells without cytotoxic stains or photobleachable fluorescent dyes are providing new tools to biologists who seek to observe individual cells over extended time periods. This paper will review several recent advances in photonic crystal biosensor detection instrumentation and device structures that are being applied towards direct detection of small molecules in the context of high throughput drug screening, photonic crystal fluorescence enhancement as utilized for high sensitivity multiplexed cancer biomarker detection, and label-free high resolution imaging of cells and individual nanoparticles as a new tool for life science research and single-molecule diagnostics.
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Affiliation(s)
- B.T. Cunningham
- Dept. of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign
- Dept. of Bioengineering, University of Illinois at Urbana-Champaign
- Micro and Nanotechnology Laboratory, University of Illinois at Urbana-Champaign
| | - M. Zhang
- Dept. of Physics, University of Illinois at Urbana-Champaign
| | - Y. Zhuo
- Dept. of Bioengineering, University of Illinois at Urbana-Champaign
- Micro and Nanotechnology Laboratory, University of Illinois at Urbana-Champaign
| | - L. Kwon
- Dept. of Bioengineering, University of Illinois at Urbana-Champaign
| | - C. Race
- Dept. of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign
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8
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Smart detection of microRNAs through fluorescence enhancement on a photonic crystal. Talanta 2016; 150:699-704. [DOI: 10.1016/j.talanta.2016.01.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 12/28/2015] [Accepted: 01/02/2016] [Indexed: 02/01/2023]
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9
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Frascella F, Ricciardi S, Pasquardini L, Potrich C, Angelini A, Chiadò A, Pederzolli C, De Leo N, Rivolo P, Pirri CF, Descrovi E. Enhanced fluorescence detection of miRNA-16 on a photonic crystal. Analyst 2016; 140:5459-63. [PMID: 26140547 DOI: 10.1039/c5an00889a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a novel sensing method for fluorescence-labelled microRNAs (miRNAs) spotted on an all-dielectric photonic structure. Such a photonic structure provides an enhanced excitation and a directional beaming of the emitted fluorescence, resulting in a significant improvement of the overall signal collected. As a result, the Limit of Detection (LoD) is demonstrated to decrease by a factor of about 50. A compact read-out system allows a wide-field imaging-based detection, with little or no optical alignment issues, which makes this approach particularly interesting for further development for example in microarray-type bioassays.
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Affiliation(s)
- F Frascella
- Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129 Torino, Italy.
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Tan Y, Halsey JF, Tang T, Wetering SV, Taine E, Cleve MV, Cunningham BT. Application of photonic crystal enhanced fluorescence to detection of low serum concentrations of human IgE antibodies specific for a purified cat allergen (Fel D1). Biosens Bioelectron 2015; 77:194-201. [PMID: 26406461 DOI: 10.1016/j.bios.2015.08.071] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Revised: 07/23/2015] [Accepted: 08/31/2015] [Indexed: 01/21/2023]
Abstract
We demonstrate the detection of low concentrations of allergen-specific Immunoglobulin E (IgE) in human sera using a Photonic Crystal Enhanced Fluorescence (PCEF) microarray platform. The Photonic Crystal (PC) surface, designed to provide optical resonances for the excitation wavelength and emission wavelength of Cy5, was used to amplify the fluorescence signal intensity measured from a multiplexed allergen microarray. Surface-based sandwich immunoassays were used to detect and quantify specific IgE antibodies against a highly purified cat allergen (Fel d1). A comparison of the lowest detectable concentration of IgE measured by the PC microarray system and a commercially available clinical analyzer demonstrated that the PCEF microarray system provides higher sensitivity. The PCEF system was able to detect low concentrations of specific IgE (~0.02 kU/L), which is 5-17-fold more sensitive than the commercially available FDA-approved analyzers. In preliminary experiments using multi-allergen arrays, we demonstrate selective simultaneous detection of IgE antibodies to multiple allergens.
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Affiliation(s)
- Yafang Tan
- Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, United states
| | - John F Halsey
- Exalt Diagnostics, Urbana-Champaign, IL, United States
| | - Tiantian Tang
- Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, United states
| | | | - Elaine Taine
- Hycor Biomedical, Indianapolis, IN, United States
| | | | - Brian T Cunningham
- Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, United states; Department of Bioengineering, University of Illinois at Urbana-Champaign, United States.
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Jones SI, Tan Y, Shamimuzzaman M, George S, Cunningham BT, Vodkin L. Direct detection of transcription factors in cotyledons during seedling development using sensitive silicon-substrate photonic crystal protein arrays. PLANT PHYSIOLOGY 2015; 167:639-49. [PMID: 25635113 PMCID: PMC4348770 DOI: 10.1104/pp.114.253666] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Accepted: 01/27/2015] [Indexed: 05/04/2023]
Abstract
Transcription factors control important gene networks, altering the expression of a wide variety of genes, including those of agronomic importance, despite often being expressed at low levels. Detecting transcription factor proteins is difficult, because current high-throughput methods may not be sensitive enough. One-dimensional, silicon-substrate photonic crystal (PC) arrays provide an alternative substrate for printing multiplexed protein microarrays that have greater sensitivity through an increased signal-to-noise ratio of the fluorescent signal compared with performing the same assay upon a traditional aminosilanized glass surface. As a model system to test proof of concept of the silicon-substrate PC arrays to directly detect rare proteins in crude plant extracts, we selected representatives of four different transcription factor families (zinc finger GATA, basic helix-loop-helix, BTF3/NAC [for basic transcription factor of the NAC family], and YABBY) that have increasing transcript levels during the stages of seedling cotyledon development. Antibodies to synthetic peptides representing the transcription factors were printed on both glass slides and silicon-substrate PC slides along with antibodies to abundant cotyledon proteins, seed lectin, and Kunitz trypsin inhibitor. The silicon-substrate PC arrays proved more sensitive than those performed on glass slides, detecting rare proteins that were below background on the glass slides. The zinc finger transcription factor was detected on the PC arrays in crude extracts of all stages of the seedling cotyledons, whereas YABBY seemed to be at the lower limit of their sensitivity. Interestingly, the basic helix-loop-helix and NAC proteins showed developmental profiles consistent with their transcript patterns, indicating proof of concept for detecting these low-abundance proteins in crude extracts.
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Affiliation(s)
- Sarah I Jones
- Departments of Crop Sciences (S.I.J., M.S., L.V.) andElectrical and Computer Engineering (Y.T., S.G., B.T.C.), University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
| | - Yafang Tan
- Departments of Crop Sciences (S.I.J., M.S., L.V.) andElectrical and Computer Engineering (Y.T., S.G., B.T.C.), University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
| | - Md Shamimuzzaman
- Departments of Crop Sciences (S.I.J., M.S., L.V.) andElectrical and Computer Engineering (Y.T., S.G., B.T.C.), University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
| | - Sherine George
- Departments of Crop Sciences (S.I.J., M.S., L.V.) andElectrical and Computer Engineering (Y.T., S.G., B.T.C.), University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
| | - Brian T Cunningham
- Departments of Crop Sciences (S.I.J., M.S., L.V.) andElectrical and Computer Engineering (Y.T., S.G., B.T.C.), University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
| | - Lila Vodkin
- Departments of Crop Sciences (S.I.J., M.S., L.V.) andElectrical and Computer Engineering (Y.T., S.G., B.T.C.), University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
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Reddington AP, Trueb JT, Freedman DS, Tuysuzoglu A, Daaboul GG, Lopez CA, Karl WC, Connor JH, Fawcett H, Ünlu MS. An interferometric reflectance imaging sensor for point of care viral diagnostics. IEEE Trans Biomed Eng 2014; 60:3276-83. [PMID: 24271115 DOI: 10.1109/tbme.2013.2272666] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The use of in vitro diagnostic devices is transitioning from the laboratory to the primary care setting to address early disease detection needs. Time critical viral diagnoses are often made without support due to the experimental time required in today's standard tests. Available rapid point of care (POC) viral tests are less reliable, requiring a follow-on confirmatory test before conclusions can be drawn. The development of a reliable POC viral test for the primary care setting would decrease the time for diagnosis leading to a lower chance of transmission and improve recovery. The single particle interferometric reflectance imaging sensor (SP-IRIS) has been shown to be a sensitive and specific-detection platform in serum and whole blood. This paper presents a step towards a POC viral assay through a SP-IRIS prototype with automated data acquisition and analysis and a simple, easy-to-use software interface. Decreasing operation complexity highlights the potential of SP-IRIS as a sensitive and specific POC diagnostic tool. With the integration of a microfluidic cartridge, this automated instrument will allow an untrained user to run a sample-to-answer viral assay in the POC setting.
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Zhang Y, Li X, Gao L, Qiu J, Heng L, Tang BZ, Jiang L. Silole-Infiltrated Photonic Crystal Films as Effective Fluorescence Sensor for Fe3+and Hg2+. Chemphyschem 2014; 15:507-13. [DOI: 10.1002/cphc.201300949] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2013] [Revised: 12/18/2013] [Indexed: 11/08/2022]
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Giri B, Dutta D. Improvement in the sensitivity of microfluidic ELISA through field amplified stacking of the enzyme reaction product. Anal Chim Acta 2013; 810:32-8. [PMID: 24439502 DOI: 10.1016/j.aca.2013.12.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Revised: 12/02/2013] [Accepted: 12/03/2013] [Indexed: 11/19/2022]
Abstract
In this article, we demonstrate a novel approach to enhancing the sensitivity of enzyme-linked immunosorbent assays (ELISA) through pre-concentration of the enzyme reaction product (resorufin/4-methylumbelliferone) in free solution. The reported pre-concentration was accomplished by transporting the resorufin/4-methylumbelliferone molecules produced in the ELISA process towards a high ionic-strength buffer stream in a microfluidic channel while applying a voltage drop across this merging region. A sharp change in the electric field around the junction of the two liquid streams was observed to abruptly slow down the negatively charged resorufin/4-methylumbelliferone species leading to the reported pre-concentration effect based on the field amplified stacking (FAS) technique. It has been shown that the resulting enhancement in the detectability of the enzyme reaction product significantly improves the signal-to-noise ratio in the system thereby reducing the smallest detectable analyte concentration in the ELISA method. Applying the above-described approach, we were able to detect mouse anti-BSA and human TNF-α at concentrations nearly 60-fold smaller than that possible on commercial microwell plates. For the human TNF-α sample, this improvement in assay sensitivity corresponded to a limit of detection (LOD) of 0.102pg mL(-1) using the FAS based microfluidic ELISA method as compared to 7.03pg mL(-1) obtained with the traditional microwell plate based approach. Moreover, because our ELISAs were performed in micrometer sized channels, they required sample volumes about two orders of magnitude smaller than that consumed in the latter case (1μL versus 100μL).
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Affiliation(s)
- Basant Giri
- Department of Chemistry, University of Wyoming, Laramie, WY 82071, USA
| | - Debashis Dutta
- Department of Chemistry, University of Wyoming, Laramie, WY 82071, USA.
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Grepstad JO, Greve MM, Holst B, Johansen IR, Solgaard O, Sudbø A. Finite-size limitations on Quality factor of guided resonance modes in 2D photonic crystals. OPTICS EXPRESS 2013; 21:23640-23654. [PMID: 24104276 DOI: 10.1364/oe.21.023640] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
High-Q guided resonance modes in two-dimensional photonic crystals, enable high field intensity in small volumes that can be exploited to realize high performance sensors. We show through simulations and experiments how the Q-factor of guided resonance modes varies with the size of the photonic crystal, and that this variation is due to loss caused by scattering of in-plane propagating modes at the lattice boundary and coupling of incident light to fully guided modes that exist in the homogeneous slab outside the lattice boundary. A photonic crystal with reflecting boundaries, realized by Bragg mirrors with a band gap for in-plane propagating modes, has been designed to suppress these edge effects. The new design represents a way around the fundamental limitation on Q-factors for guided resonances in finite photonic crystals. Results are presented for both simulated and fabricated structures.
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Petryayeva E, Algar WR, Medintz IL. Quantum dots in bioanalysis: a review of applications across various platforms for fluorescence spectroscopy and imaging. APPLIED SPECTROSCOPY 2013; 67:215-52. [PMID: 23452487 DOI: 10.1366/12-06948] [Citation(s) in RCA: 298] [Impact Index Per Article: 27.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Semiconductor quantum dots (QDs) are brightly luminescent nanoparticles that have found numerous applications in bioanalysis and bioimaging. In this review, we highlight recent developments in these areas in the context of specific methods for fluorescence spectroscopy and imaging. Following a primer on the structure, properties, and biofunctionalization of QDs, we describe select examples of how QDs have been used in combination with steady-state or time-resolved spectroscopic techniques to develop a variety of assays, bioprobes, and biosensors that function via changes in QD photoluminescence intensity, polarization, or lifetime. Some special attention is paid to the use of Förster resonance energy transfer-type methods in bioanalysis, including those based on bioluminescence and chemiluminescence. Direct chemiluminescence, electrochemiluminescence, and charge transfer quenching are similarly discussed. We further describe the combination of QDs and flow cytometry, including traditional cellular analyses and spectrally encoded barcode-based assay technologies, before turning our attention to enhanced fluorescence techniques based on photonic crystals or plasmon coupling. Finally, we survey the use of QDs across different platforms for biological fluorescence imaging, including epifluorescence, confocal, and two-photon excitation microscopy; single particle tracking and fluorescence correlation spectroscopy; super-resolution imaging; near-field scanning optical microscopy; and fluorescence lifetime imaging microscopy. In each of the above-mentioned platforms, QDs provide the brightness needed for highly sensitive detection, the photostability needed for tracking dynamic processes, or the multiplexing capacity needed to elucidate complex systems. There is a clear synergy between advances in QD materials and spectroscopy and imaging techniques, as both must be applied in concert to achieve their full potential.
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Affiliation(s)
- Eleonora Petryayeva
- Department of Chemistry, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
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A fluorescent one-dimensional photonic crystal for label-free biosensing based on BLOCH surface waves. SENSORS 2013; 13:2011-22. [PMID: 23385414 PMCID: PMC3649429 DOI: 10.3390/s130202011] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2012] [Revised: 01/29/2013] [Accepted: 02/04/2013] [Indexed: 12/27/2022]
Abstract
A one-dimensional photonic crystal (1DPC) based on a planar stack of dielectric layers is used as an optical transducer for biosensing, upon the coupling of TE-polarized Bloch Surface Waves (BSW). The structure is tailored with a polymeric layer providing a chemical functionality facilitating the covalent binding of orienting proteins needed for a subsequent grafting of antibodies in an immunoassay detection scheme. The polymeric layer is impregnated with Cy3 dye, in such a way that the photonic structure can exhibit an emissive behavior. The BSW-coupled fluorescence shift is used as a means for detecting refractive index variations occurring at the 1DPC surface, according to a label-free concept. The proposed working principle is successfully demonstrated in real-time tracking of protein G covalent binding on the 1DPC surface within a fluidic cell.
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Schwarz M, Pahlow S, Bocklitz T, Steinbrücker C, Cialla D, Weber K, Popp J. Convenient detection of E. coli in Ringer's solution. Analyst 2013; 138:5866-70. [DOI: 10.1039/c3an01240a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Zhang Y, Gao L, Wen L, Heng L, Song Y. Highly sensitive, selective and reusable mercury(ii) ion sensor based on a ssDNA-functionalized photonic crystal film. Phys Chem Chem Phys 2013; 15:11943-9. [DOI: 10.1039/c3cp51324f] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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