1
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Sharda D, Kaur P, Choudhury D. Protein-modified nanomaterials: emerging trends in skin wound healing. DISCOVER NANO 2023; 18:127. [PMID: 37843732 PMCID: PMC10579214 DOI: 10.1186/s11671-023-03903-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Accepted: 09/23/2023] [Indexed: 10/17/2023]
Abstract
Prolonged inflammation can impede wound healing, which is regulated by several proteins and cytokines, including IL-4, IL-10, IL-13, and TGF-β. Concentration-dependent effects of these molecules at the target site have been investigated by researchers to develop them as wound-healing agents by regulating signaling strength. Nanotechnology has provided a promising approach to achieve tissue-targeted delivery and increased effective concentration by developing protein-functionalized nanoparticles with growth factors (EGF, IGF, FGF, PDGF, TGF-β, TNF-α, and VEGF), antidiabetic wound-healing agents (insulin), and extracellular proteins (keratin, heparin, and silk fibroin). These molecules play critical roles in promoting cell proliferation, migration, ECM production, angiogenesis, and inflammation regulation. Therefore, protein-functionalized nanoparticles have emerged as a potential strategy for improving wound healing in delayed or impaired healing cases. This review summarizes the preparation and applications of these nanoparticles for normal or diabetic wound healing and highlights their potential to enhance wound healing.
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Affiliation(s)
- Deepinder Sharda
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, Patiala, Punjab, 147004, India
| | - Pawandeep Kaur
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, Patiala, Punjab, 147004, India
| | - Diptiman Choudhury
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, Patiala, Punjab, 147004, India.
- Thapar Institute of Engineering and Technology-Virginia Tech Centre of Excellence for Emerging Materials, Thapar Institute of Engineering and Technology, Patiala, Punjab, 147004, India.
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2
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Wang T, Chen L, Chikkanna A, Chen S, Brusius I, Sbuh N, Veedu RN. Development of nucleic acid aptamer-based lateral flow assays: A robust platform for cost-effective point-of-care diagnosis. Theranostics 2021; 11:5174-5196. [PMID: 33859741 PMCID: PMC8039946 DOI: 10.7150/thno.56471] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 01/29/2021] [Indexed: 02/07/2023] Open
Abstract
Lateral flow assay (LFA) has made a paradigm shift in the in vitro diagnosis field due to its rapid turnaround time, ease of operation and exceptional affordability. Currently used LFAs predominantly use antibodies. However, the high inter-batch variations, error margin and storage requirements of the conventional antibody-based LFAs significantly impede its applications. The recent progress in aptamer technology provides an opportunity to combine the potential of aptamer and LFA towards building a promising platform for highly efficient point-of-care device development. Over the past decades, different forms of aptamer-based LFAs have been introduced for broad applications ranging from disease diagnosis, agricultural industry to environmental sciences, especially for the detection of antibody-inaccessible small molecules such as toxins and heavy metals. But commercial aptamer-based LFAs are still not used widely compared with antibodies. In this work, by analysing the key issues of aptamer-based LFA design, including immobilization strategies, signalling methods, and target capturing approaches, we provide a comprehensive overview about aptamer-based LFA design strategies to facilitate researchers to develop optimised aptamer-based LFAs.
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Affiliation(s)
- Tao Wang
- Centre for Molecular Medicine and Innovative Therapeutics, Murdoch University, Perth 6150, Australia
- Perron Institute for Neurological and Translational Science, Perth 6009, Australia
| | - Lanmei Chen
- Centre for Molecular Medicine and Innovative Therapeutics, Murdoch University, Perth 6150, Australia
- Guangdong Key Laboratory for Research and Development of Nature Drugs, School of Pharmacy, Guangdong Medical University, Zhanjiang 524023, China
| | - Arpitha Chikkanna
- Centre for Molecular Medicine and Innovative Therapeutics, Murdoch University, Perth 6150, Australia
| | - Suxiang Chen
- Centre for Molecular Medicine and Innovative Therapeutics, Murdoch University, Perth 6150, Australia
| | - Isabell Brusius
- Centre for Molecular Medicine and Innovative Therapeutics, Murdoch University, Perth 6150, Australia
| | - Nabayet Sbuh
- Centre for Molecular Medicine and Innovative Therapeutics, Murdoch University, Perth 6150, Australia
| | - Rakesh N. Veedu
- Centre for Molecular Medicine and Innovative Therapeutics, Murdoch University, Perth 6150, Australia
- Perron Institute for Neurological and Translational Science, Perth 6009, Australia
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3
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Bannai H, Niwa F, Sakuragi S, Mikoshiba K. Inhibitory synaptic transmission tuned by Ca 2+ and glutamate through the control of GABA A R lateral diffusion dynamics. Dev Growth Differ 2020; 62:398-406. [PMID: 32329058 PMCID: PMC7496684 DOI: 10.1111/dgd.12667] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 04/08/2020] [Accepted: 04/18/2020] [Indexed: 11/30/2022]
Abstract
The GABAergic synapses, a primary inhibitory synapse in the mammalian brain, is important for the normal development of brain circuits, and for the regulation of the excitation‐inhibition balance critical for brain function from the developmental stage throughout life. However, the molecular mechanism underlying the formation, maintenance, and modulation of GABAergic synapses is less understood compared to that of excitatory synapses. Quantum dot‐single particle tracking (QD‐SPT), a super‐resolution imaging technique that enables the analysis of membrane molecule dynamics at single‐molecule resolution, is a powerful tool to analyze the behavior of proteins and lipids on the plasma membrane. In this review, we summarize the recent application of QD‐SPT in understanding of GABAergic synaptic transmission. Here we introduce QD‐SPT experiments that provide further insights into the molecular mechanism supporting GABAergic synapses. QD‐SPT studies revealed that glutamate and Ca2+ signaling is involved in (a) the maintenance of GABAergic synapses, (b) GABAergic long‐term depression, and GABAergic long‐term potentiation, by specifically activating signaling pathways unique to each phenomenon. We also introduce a novel Ca2+ imaging technique to describe the diversity of Ca2+ signals that may activate the downstream signaling pathways that induce specific biological output.
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Affiliation(s)
- Hiroko Bannai
- School of Advanced Science and Engineering, Department of Electrical Engineering and Biosciences, Waseda University, Tokyo, Japan.,Department of Neurophysiology, Keio University School of Medicine, Tokyo, Japan.,Japan Science and Technology Agency, PRESTO, Kawaguchi, Saitama, Japan.,Laboratory for Developmental Neurobiology, RIKEN Center for Brain Science, Wako, Japan
| | - Fumihiro Niwa
- Laboratory for Developmental Neurobiology, RIKEN Center for Brain Science, Wako, Japan.,Institut de Biologie de l'ENS (IBENS), École Normale Supérieure, PSL Research University, INSERM, CNRS, Paris, France
| | - Shigeo Sakuragi
- School of Advanced Science and Engineering, Department of Electrical Engineering and Biosciences, Waseda University, Tokyo, Japan.,Department of Pharmacology, Faculty of Medicine, Yamagata University, Yamagata, Japan
| | - Katsuhiko Mikoshiba
- Laboratory for Developmental Neurobiology, RIKEN Center for Brain Science, Wako, Japan.,Shanghai Institute for Advanced Immunochemical Studies (SIAIS), ShanghaiTech University, Shanghai, China.,Department of Biomolecular Science, Faculty of Science, Toho University, Funabashi, Japan
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4
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Hottechamps J, Noblet T, Brans A, Humbert C, Dreesen L. How Quantum Dots Aggregation Enhances Förster Resonant Energy Transfer. Chemphyschem 2020; 21:853-862. [DOI: 10.1002/cphc.202000067] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Indexed: 11/08/2022]
Affiliation(s)
- Julie Hottechamps
- GRASP-BiophotonicsCESAMUniversity of LiegeInstitute of Physics Allée du 6 août 17 4000 Liège Belgium
| | - Thomas Noblet
- GRASP-BiophotonicsCESAMUniversity of LiegeInstitute of Physics Allée du 6 août 17 4000 Liège Belgium
| | - Alain Brans
- Center for Protein Engineering (CIP)InBioSUniversity of Liege, Quartier Agora Allée du six Août 13, B6a 4000 Liège Belgium
| | - Christophe Humbert
- Université Paris-SaclayCNRSInstitut de Chimie Physique UMR 8000 91405 Orsay France
| | - Laurent Dreesen
- GRASP-BiophotonicsCESAMUniversity of LiegeInstitute of Physics Allée du 6 août 17 4000 Liège Belgium
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5
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Xavier M, García-Hevia L, Amado IR, Pastrana L, Gonçalves C. In Vitro Intestinal Uptake And Permeability Of Fluorescently-Labelled Hyaluronic Acid Nanogels. Int J Nanomedicine 2019; 14:9077-9088. [PMID: 31819420 PMCID: PMC6877450 DOI: 10.2147/ijn.s224255] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 10/04/2019] [Indexed: 12/28/2022] Open
Abstract
Background Oral administration remains the most common mode of drug delivery. However, orally administered bioactive compounds must first survive digestion and then be absorbed at the intestine in order to reach other tissues or organs. The efficiency of both processes can be improved by encapsulation or conjugation with polymeric nanoparticles. Here we report the synthesis of amphiphilic hyaluronic acid (HyA) nanogels as nanocarriers for drug delivery. Methods HyA nanogels were prepared by self-assembly from amphiphilic HyA conjugates produced by grafting hydrophobic alkyl chains to the HyA backbone. The dye Cy5.5 was covalently bonded and used for tracking. The nanogels were characterised according to their structure, size and zeta potential, as well as biocompatibility towards an intestinal epithelial cell line. The uptake and intestinal permeability of the nanogels were assessed using in vitro models, which physiological relevance was verified regarding the morphology of the epithelium, the production of mucus, the expression of occludin and the transepithelial electrical resistance. Results The covalent binding of Cy5.5 did not affect significantly the size and surface charge of the nanogels at 125.1 ± 3.2 nm and -57.6 ± 6.2 mV respectively after labelling. Studies of biocompatibility showed that the nanogels were non-toxic to Caco-2 cells up to the concentration of 0.1 mg∙mL-1. The presence of mucus affected the nanogel uptake and highlighted the importance of considering mucus-producing cells in in vitro intestinal models. The uptake or adsorption to a Caco-2/HT29-MTX co-culture (8.1%) was higher than with single Caco-2 cell cultures (4.3%). Interestingly, both models led to minute (<0.5%) permeation of the nanogels across the intestinal barrier. Conclusion The HyA nanogels demonstrated to be mucoadhesive and effectively uptaken by intestinal cells. Both are determinant features for sustained release, but if systemic delivery is envisaged further modification with targeting moieties could be important to improve the nanogel permeability.
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Affiliation(s)
- Miguel Xavier
- Department of Life Sciences, International Iberian Nanotechnology Laboratory, Braga 4715-330, Portugal
| | - Lorena García-Hevia
- Department of Life Sciences, International Iberian Nanotechnology Laboratory, Braga 4715-330, Portugal
| | - Isabel R Amado
- Department of Life Sciences, International Iberian Nanotechnology Laboratory, Braga 4715-330, Portugal.,Department of Food and Analytical Chemistry, Faculty of Sciences, University of Vigo, Ourense 32004, Spain
| | - Lorenzo Pastrana
- Department of Life Sciences, International Iberian Nanotechnology Laboratory, Braga 4715-330, Portugal
| | - Catarina Gonçalves
- Department of Life Sciences, International Iberian Nanotechnology Laboratory, Braga 4715-330, Portugal
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6
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Wilhelm MJ, Dai HL. Molecule-Membrane Interactions in Biological Cells Studied with Second Harmonic Light Scattering. Chem Asian J 2019; 15:200-213. [PMID: 31721448 DOI: 10.1002/asia.201901406] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 11/12/2019] [Indexed: 12/13/2022]
Abstract
The nonlinear optical phenomenon second harmonic light scattering (SHS) can be used for detecting molecules at the membrane surfaces of living biological cells. Over the last decade, SHS has been developed for quantitatively monitoring the adsorption and transport of small and medium size molecules (both neutral and ionic) across membranes in living cells. SHS can be operated with both time and spatial resolution and is even capable of isolating molecule-membrane interactions at specific membrane surfaces in multi-membrane cells, such as bacteria. In this review, we discuss select examples from our lab employing time-resolved SHS to study real-time molecular interactions at the plasma membranes of biological cells. We first demonstrate the utility of this method for determining the transport rates at each membrane/interface in a Gram-negative bacterial cell. Next, we show how SHS can be used to characterize the molecular mechanism of the century old Gram stain protocol for classifying bacteria. Additionally, we examine how membrane structures and molecular charge and polarity affect adsorption and transport, as well as how antimicrobial compounds alter bacteria membrane permeability. Finally, we discuss adaptation of SHS as an imaging modality to quantify molecular adsorption and transport in sub-cellular regions of individual living cells.
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Affiliation(s)
- Michael J Wilhelm
- Department of Chemistry, Temple University, 1901 N. 13th Street, Philadelphia, PA 19122, USA
| | - Hai-Lung Dai
- Department of Chemistry, Temple University, 1901 N. 13th Street, Philadelphia, PA 19122, USA
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7
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Cluster binding studies with two anti-Thomsen-Friedenreich (anti-core-1, CD176, TF) antibodies: Evidence for a multiple TF epitope. Int Immunopharmacol 2019; 72:186-194. [PMID: 30999209 DOI: 10.1016/j.intimp.2019.03.058] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Revised: 03/04/2019] [Accepted: 03/28/2019] [Indexed: 11/21/2022]
Abstract
Antibodies to carbohydrate epitopes are often of the IgM isotype and require multiple binding for sufficient avidity. Therefore clusters of epitopes are preferred antigenic sites in these cases. We have examined the type of clusters recognized by two anti-Thomsen-Friedenreich (TF, core-1, CD176) IgM antibodies, NM-TF1 and NM-TF2, using several different sets of TF-carrying synthetic glycoconjugates in ELISA experiments. To our surprise, the single most important factor determining binding strength was a close vicinity of several TF glycans at distances of ≤1 nm. Considering the known dimensions of IgM antibodies, our data strongly suggest that a cluster of up to four TF moieties, presenting as a "multiple epitope", is required to attach to a single combining site in order to result in adequate binding strength. This effect can also be achieved by "surrogate-multiple epitopes" consisting of separate TF-carrying molecules in close vicinity. In addition, it was found that serine-linked TFs are stronger bound than threonine-linked TFs by both antibodies. This peculiar type of cluster recognition may contribute to improved avidity and explicit tumor specificity.
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8
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Piestrzyńska M, Dominik M, Kosiel K, Janczuk-Richter M, Szot-Karpińska K, Brzozowska E, Shao L, Niedziółka-Jonsson J, Bock WJ, Śmietana M. Ultrasensitive tantalum oxide nano-coated long-period gratings for detection of various biological targets. Biosens Bioelectron 2019; 133:8-15. [PMID: 30903939 DOI: 10.1016/j.bios.2019.03.006] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 03/04/2019] [Accepted: 03/05/2019] [Indexed: 11/28/2022]
Abstract
In this work we discussed a label-free biosensing application of long-period gratings (LPGs) optimized in refractive index (RI) sensitivity by deposition of thin tantalum oxide (TaOx) overlays. Comparing to other thin film and materials already applied for maximizing the RI sensitivity, TaOx offers good chemical and mechanical stability during its surface functionalization and other biosensing experiments. It was shown theoretically and experimentally that when RI of the overlay is as high as 2 in IR spectral range, for obtaining LPGs ultrasensitive to RI, the overlay's thickness must be determined with subnanometer precision. In this experiment the TaOx overlays were deposited using Atomic Layer Deposition method that allowed for achieving overlays with exceptionally well-defined thickness and optical properties. The TaOx nano-coated LPGs show RI sensitivity determined for a single resonance exceeding 11,500 nm/RIU in RI range nD= 1.335-1.345 RIU, as expected for label-free biosensing applications. Capability for detection of various in size biological targets, i.e., proteins (avidin) and bacteria (Escherichia coli), with TaOx-coated LPGs was verified using biotin and bacteriophage adhesin as recognition elements, respectively. It has been shown that functionalization process, as well as type of recognition elements and target analyte must be taken into consideration when the LPG sensitivity is optimized. In this work optimized approach made possible detection of small in size biological targets such as proteins with sensitivity reaching 10.21 nm/log(ng/ml).
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Affiliation(s)
- Monika Piestrzyńska
- Warsaw University of Technology, Institute of Microelectronics and Optoelectronics, Warsaw, Koszykowa 75, Poland
| | - Magdalena Dominik
- Warsaw University of Technology, Institute of Microelectronics and Optoelectronics, Warsaw, Koszykowa 75, Poland
| | - Kamil Kosiel
- Institute of Electron Technology, Al. Lotników 32/46, 02-668 Warsaw, Poland
| | - Marta Janczuk-Richter
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Katarzyna Szot-Karpińska
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Ewa Brzozowska
- Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Rudolfa Weigla 12, 53-114 Wrocław, Poland
| | - Liyang Shao
- Southern University of Science and Technology, Department of Electrical and Electronic Engineering, Shenzhen 518055, China
| | | | - Wojtek J Bock
- Université du Québec en Outaouais, Centre de Recherche en Photonique, 101 Rue Saint-Jean-Bosco, Gatineau, QC, Canada J8X 3X7
| | - Mateusz Śmietana
- Warsaw University of Technology, Institute of Microelectronics and Optoelectronics, Warsaw, Koszykowa 75, Poland; Southern University of Science and Technology, Department of Electrical and Electronic Engineering, Shenzhen 518055, China.
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9
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Gagni P, Romanato A, Bergamaschi G, Bettotti P, Vanna R, Piotto C, Morasso CF, Chiari M, Cretich M, Gori A. A self-assembling peptide hydrogel for ultrarapid 3D bioassays. NANOSCALE ADVANCES 2019; 1:490-497. [PMID: 36132256 PMCID: PMC9473263 DOI: 10.1039/c8na00158h] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Accepted: 10/22/2018] [Indexed: 05/08/2023]
Abstract
Biosensing analytical platforms rely on the intimate structure-function relationship of immobilized probes. In this context, hydrogels are appealing semi-wet systems to locally confine biomolecules while preserving their structural integrity and function. Yet, limitations imposed by biomolecule diffusion rates or fabrication difficulties still hamper their broad application. Here, using a self-assembling peptide, a printable and self-adhesive hydrogel was obtained and applied to fabricate arrays of localized bio-functional 3D microenvironments on analytical interfaces. This soft matrix represents a robust and versatile material, allowing fast and selective tuning of analyte diffusion, which is exploited here to run in-gel immunoassays under solution-like conditions in an unprecedented (<10 min) time frame. The developed material overcomes major limitations associated with hydrogels for bioassays, widening the prospects for easy fabrication of multifunctional bio-interfaces for high-throughput, molecular recognition assays.
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Affiliation(s)
- Paola Gagni
- National Research Council of Italy, Istituto di Chimica del Riconoscimento Molecolare (ICRM) Via Mario Bianco, 9 20131-Milano Italy
| | - Alessandro Romanato
- National Research Council of Italy, Istituto di Chimica del Riconoscimento Molecolare (ICRM) Via Mario Bianco, 9 20131-Milano Italy
| | - Greta Bergamaschi
- National Research Council of Italy, Istituto di Chimica del Riconoscimento Molecolare (ICRM) Via Mario Bianco, 9 20131-Milano Italy
| | - Paolo Bettotti
- Nanoscience Laboratory, Department of Physics, University of Trento Via Sommarive 14 38123 Povo Italy
| | - Renzo Vanna
- Istituti Clinici Scientifici Maugeri IRCCS Via Maugeri 4 27100 Pavia Italy
| | - Chiara Piotto
- Nanoscience Laboratory, Department of Physics, University of Trento Via Sommarive 14 38123 Povo Italy
| | - Carlo F Morasso
- Istituti Clinici Scientifici Maugeri IRCCS Via Maugeri 4 27100 Pavia Italy
| | - Marcella Chiari
- National Research Council of Italy, Istituto di Chimica del Riconoscimento Molecolare (ICRM) Via Mario Bianco, 9 20131-Milano Italy
| | - Marina Cretich
- National Research Council of Italy, Istituto di Chimica del Riconoscimento Molecolare (ICRM) Via Mario Bianco, 9 20131-Milano Italy
| | - Alessandro Gori
- National Research Council of Italy, Istituto di Chimica del Riconoscimento Molecolare (ICRM) Via Mario Bianco, 9 20131-Milano Italy
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10
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Choi H, Lee JM, Jung Y. Monomeric Covalent-Avidin for Rapid and Covalent Labeling of Quantum Dots to Cell Surface Proteins. ACTA ACUST UNITED AC 2019; 3:e1800288. [PMID: 32627405 DOI: 10.1002/adbi.201800288] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 11/26/2018] [Indexed: 01/25/2023]
Abstract
With high brightness and photostability, quantum dots (QDs) are potent probes for long-term imaging of dynamic cell surface proteins, but practical methods to covalently label QDs to target proteins for stable imaging are largely lacking. Here, a small covalent-bond forming protein (Covalent-avidin)/peptide pair is introduced, which provides a recombinant protein-based rapid and covalent QD labeling strategy. Covalent-avidin is constructed by optimized fusion of circular permuted monomeric avidin to SpyCatcher, which forms an isopeptide bond with the SpyTag peptide. Covalent-avidin-conjugated QDs allow for strong and irreversible QD labeling to the biotinylated SpyTag-fused adrenergic receptor on live cells in 2 min. In addition, QDs with only a minimum number of conjugated Covalent-avidin show more stable receptor labeling than commercially available streptavidin-conjugated QDs, also with minimal unwanted clustering of labeled receptors. Monomeric Covalent-avidin will be a valuable protein linker for diverse other nanolabeling structures with beneficial properties such as covalent linkages and facile valency control.
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Affiliation(s)
- Hyeokjune Choi
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, South Korea
| | - Jeong Min Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, South Korea
| | - Yongwon Jung
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, South Korea
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11
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Labouta HI, Gomez-Garcia MJ, Sarsons CD, Nguyen T, Kennard J, Ngo W, Terefe K, Iragorri N, Lai P, Rinker KD, Cramb DT. Surface-grafted polyethylene glycol conformation impacts the transport of PEG-functionalized liposomes through a tumour extracellular matrix model. RSC Adv 2018; 8:7697-7708. [PMID: 35539117 PMCID: PMC9078461 DOI: 10.1039/c7ra13438j] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Accepted: 02/13/2018] [Indexed: 12/29/2022] Open
Abstract
The effect of surface PEGylation on nanoparticle transport through an extracellular matrix (ECM) is an important determinant for tumor targeting success. Fluorescent stealth liposomes (base lipid DOPC) were prepared incorporating different proportions of PEG-grafted lipids (2.5, 5 and 10% of the total lipid content) for a series of PEG molecular weights (1000, 2000 and 5000 Da). The ECM was modelled using a collagen matrix. The kinetics of PEGylated liposome adhesion to and transport in collagen matrices were tracked using fluorescence correlation spectroscopy (FCS) and confocal microscopy, respectively. Generalized least square regressions were used to determine the temporal correlations between PEG molecular weight, surface density and conformation, and the liposome transport in a collagen hydrogel over 15 hours. PEG conformation determined the interaction of liposomes with the collagen hydrogel and their transport behaviour. Interestingly, liposomes with mushroom PEG conformation accumulated on the interface of the collagen hydrogel, creating a dense liposomal front with short diffusion distances into the hydrogels. On the other hand, liposomes with dense brush PEG conformation interacted to a lesser extent with the collagen hydrogel and diffused to longer distances. In conclusion, a better understanding of PEG surface coating as a modifier of transport in a model ECM matrix has resulted. This knowledge will improve design of future liposomal drug carrier systems. The effect of surface PEGylation on nanoparticle transport through an extracellular matrix (ECM) is an important determinant for tumor targeting success.![]()
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Affiliation(s)
- Hagar I. Labouta
- Department of Chemistry
- Faculty of Science
- University of Calgary
- Canada
- Biomedical Engineering
| | | | | | - Trinh Nguyen
- Department of Chemistry
- Faculty of Science
- University of Calgary
- Canada
| | | | - Wayne Ngo
- Department of Chemistry
- Faculty of Science
- University of Calgary
- Canada
| | | | - Nicolas Iragorri
- Health Technology Assessment Unit
- Department of Community Health Sciences
- Cumming School of Medicine
- University of Calgary
- Canada
| | - Patrick Lai
- Department of Biological Sciences
- University of Calgary
- Canada
| | - Kristina D. Rinker
- Biomedical Engineering
- University of Calgary
- Canada
- Department of Physiology and Pharmacology
- University of Calgary
| | - David T. Cramb
- Department of Chemistry
- Faculty of Science
- University of Calgary
- Canada
- Department of Physiology and Pharmacology
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12
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Zhang R, Deng T, Wang J, Wu G, Li S, Gu Y, Deng D. Organic-to-aqueous phase transfer of Zn–Cu–In–Se/ZnS quantum dots with multifunctional multidentate polymer ligands for biomedical optical imaging. NEW J CHEM 2017. [DOI: 10.1039/c7nj00573c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
ZnCuInSe/ZnS QDs with widely tunable PL emissions were synthesized and water-solubilized with cRGD modified multifunctional multidentate polymer (cRGD-PME) for bioimaging.
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Affiliation(s)
- Rong Zhang
- Department of Biomedical Engineering
- School of Engineering
- China Pharmaceutical University
- Nanjing
- China
| | - Tao Deng
- Department of Pharmaceutical Engineering
- School of Engineering
- China Pharmaceutical University
- Nanjing
- China
| | - Jie Wang
- Department of Pharmaceutical Engineering
- School of Engineering
- China Pharmaceutical University
- Nanjing
- China
| | - Gang Wu
- Department of Biology
- School of Life Science and Technology
- China Pharmaceutical University
- Nanjing
- China
| | - Sirui Li
- Department of Pharmaceutical Engineering
- School of Engineering
- China Pharmaceutical University
- Nanjing
- China
| | - Yueqing Gu
- Department of Biomedical Engineering
- School of Engineering
- China Pharmaceutical University
- Nanjing
- China
| | - Dawei Deng
- Department of Biomedical Engineering
- School of Engineering
- China Pharmaceutical University
- Nanjing
- China
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13
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Ma L, Tu C, Le P, Chitoor S, Lim SJ, Zahid MU, Teng KW, Ge P, Selvin PR, Smith AM. Multidentate Polymer Coatings for Compact and Homogeneous Quantum Dots with Efficient Bioconjugation. J Am Chem Soc 2016; 138:3382-94. [PMID: 26863113 DOI: 10.1021/jacs.5b12378] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Quantum dots are fluorescent nanoparticles used to detect and image proteins and nucleic acids. Compared with organic dyes and fluorescent proteins, these nanocrystals have enhanced brightness, photostability, and wavelength tunability, but their larger size limits their use. Recently, multidentate polymer coatings have yielded stable quantum dots with small hydrodynamic dimensions (≤10 nm) due to high-affinity, compact wrapping around the nanocrystal. However, this coating technology has not been widely adopted because the resulting particles are frequently heterogeneous and clustered, and conjugation to biological molecules is difficult to control. In this article we develop new polymeric ligands and optimize coating and bioconjugation methodologies for core/shell CdSe/Cd(x)Zn(1-x)S quantum dots to generate homogeneous and compact products. We demonstrate that "ligand stripping" to rapidly displace nonpolar ligands with hydroxide ions allows homogeneous assembly with multidentate polymers at high temperature. The resulting aqueous nanocrystals are 7-12 nm in hydrodynamic diameter, have quantum yields similar to those in organic solvents, and strongly resist nonspecific interactions due to short oligoethylene glycol surfaces. Compared with a host of other methods, this technique is superior for eliminating small aggregates identified through chromatographic and single-molecule analysis. We also demonstrate high-efficiency bioconjugation through azide-alkyne click chemistry and self-assembly with hexa-histidine-tagged proteins that eliminate the need for product purification. The conjugates retain specificity of the attached biomolecules and are exceptional probes for immunofluorescence and single-molecule dynamic imaging. These results are expected to enable broad utilization of compact, biofunctional quantum dots for studying crowded macromolecular environments such as the neuronal synapse and cellular cytoplasm.
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Affiliation(s)
| | - Chunlai Tu
- School of Physical Science and Technology, ShanghaiTech University , 100 Haike Rd., Pudong New Area, Shanghai, 201210, China
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14
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Johnston HJ, Mouras R, Brown DM, Elfick A, Stone V. Exploring the cellular and tissue uptake of nanomaterials in a range of biological samples using multimodal nonlinear optical microscopy. NANOTECHNOLOGY 2015; 26:505102. [PMID: 26584818 DOI: 10.1088/0957-4484/26/50/505102] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The uptake of nanomaterials (NMs) by cells is critical in determining their potential biological impact, whether beneficial or detrimental. Thus, investigation of NM internalization by cells is a common consideration in hazard and efficacy studies. There are currently a number of approaches that are routinely used to investigate NM-cell interactions, each of which have their own advantages and limitations. Ideally, imaging modalities used to investigate NM uptake by cells should not require the NM to be labelled (e.g. with fluorophores) to facilitate its detection. We present a multimodal imaging approach employing a combination of label-free microscopies that can be used to investigate NM-cell interactions. Coherent anti-Stokes Raman scattering microscopy was used in combination with either two-photon photoluminescence or four-wave mixing (FWM) to visualize the uptake of gold or titanium dioxide NMs respectively. Live and fixed cell imaging revealed that NMs were internalized by J774 macrophage and C3A hepatocyte cell lines (15-31 μg ml(-1)). Sprague Dawley rats were exposed to NMs (intratracheal instillation, 62 μg) and NMs were detected in blood and lung leucocytes, lung and liver tissue, demonstrating that NMs could translocate from the exposure site. Obtained data illustrate that multimodal nonlinear optical microscopy may help overcome current challenges in the assessment of NM cellular uptake and biodistribution. It is therefore a powerful tool that can be used to investigate unlabelled NM cellular and tissue uptake in three dimensions, requires minimal sample preparation, and is applicable to live and fixed cells.
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Affiliation(s)
- Helinor J Johnston
- Nano Safety Research Group, School of Life Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK
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15
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Liu N, Moumanis K, Dubowski JJ. Selective Area Modification of Silicon Surface Wettability by Pulsed UV Laser Irradiation in Liquid Environment. J Vis Exp 2015:e52720. [PMID: 26575362 PMCID: PMC4692702 DOI: 10.3791/52720] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
The wettability of silicon (Si) is one of the important parameters in the technology of surface functionalization of this material and fabrication of biosensing devices. We report on a protocol of using KrF and ArF lasers irradiating Si (001) samples immersed in a liquid environment with low number of pulses and operating at moderately low pulse fluences to induce Si wettability modification. Wafers immersed for up to 4 hr in a 0.01% H2O2/H2O solution did not show measurable change in their initial contact angle (CA) ~75°. However, the 500-pulse KrF and ArF lasers irradiation of such wafers in a microchamber filled with 0.01% H2O2/H2O solution at 250 and 65 mJ/cm(2), respectively, has decreased the CA to near 15°, indicating the formation of a superhydrophilic surface. The formation of OH-terminated Si (001), with no measurable change of the wafer's surface morphology, has been confirmed by X-ray photoelectron spectroscopy and atomic force microscopy measurements. The selective area irradiated samples were then immersed in a biotin-conjugated fluorescein-stained nanospheres solution for 2 hr, resulting in a successful immobilization of the nanospheres in the non-irradiated area. This illustrates the potential of the method for selective area biofunctionalization and fabrication of advanced Si-based biosensing architectures. We also describe a similar protocol of irradiation of wafers immersed in methanol (CH3OH) using ArF laser operating at pulse fluence of 65 mJ/cm(2) and in situ formation of a strongly hydrophobic surface of Si (001) with the CA of 103°. The XPS results indicate ArF laser induced formation of Si-(OCH3)x compounds responsible for the observed hydrophobicity. However, no such compounds were found by XPS on the Si surface irradiated by KrF laser in methanol, demonstrating the inability of the KrF laser to photodissociate methanol and create -OCH3 radicals.
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Affiliation(s)
- Neng Liu
- Laboratory for Quantum Semiconductors and Photon-based BioNanotechnology, Interdisciplinary Institute for Technological Innovation, Laboratoire Nanotechnologies Nanosystèmes (LN2)- CNRS UMI-3463, Faculty of Engineering, Université de Sherbrooke;
| | - Khalid Moumanis
- Laboratory for Quantum Semiconductors and Photon-based BioNanotechnology, Interdisciplinary Institute for Technological Innovation, Laboratoire Nanotechnologies Nanosystèmes (LN2)- CNRS UMI-3463, Faculty of Engineering, Université de Sherbrooke
| | - Jan J Dubowski
- Laboratory for Quantum Semiconductors and Photon-based BioNanotechnology, Interdisciplinary Institute for Technological Innovation, Laboratoire Nanotechnologies Nanosystèmes (LN2)- CNRS UMI-3463, Faculty of Engineering, Université de Sherbrooke
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16
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Stability of fluorescent labels in PLGA polymeric nanoparticles: Quantum dots versus organic dyes. Int J Pharm 2015; 494:471-8. [DOI: 10.1016/j.ijpharm.2015.08.050] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2015] [Revised: 08/15/2015] [Accepted: 08/17/2015] [Indexed: 11/22/2022]
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17
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Choi HW, Sakata Y, Ooya T, Takeuchi T. Reflectometric interference spectroscopy-based immunosensing using immobilized antibody via His-tagged recombinant protein A. J Biosci Bioeng 2015; 119:195-9. [DOI: 10.1016/j.jbiosc.2014.06.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Revised: 05/28/2014] [Accepted: 06/25/2014] [Indexed: 11/16/2022]
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18
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Wängler C, Chowdhury S, Höfner G, Djurova P, Purisima EO, Bartenstein P, Wängler B, Fricker G, Wanner KT, Schirrmacher R. Shuttle-cargo fusion molecules of transport peptides and the hD2/3 receptor antagonist fallypride: a feasible approach to preserve ligand-receptor binding? J Med Chem 2014; 57:4368-81. [PMID: 24779610 DOI: 10.1021/jm5004123] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
To determine if the conjugation of a small receptor ligand to a peptidic carrier to potentially facilitate transport across the blood-brain barrier (BBB) by "molecular Trojan horse" transcytosis is feasible, we synthesized several transport peptide-fallypride fusion molecules as model systems and determined their binding affinities to the hD2 receptor. Although they were affected by conjugation, the binding affinities were found to be still in the nanomolar range (between 1.5 and 64.2 nM). In addition, homology modeling of the receptor and docking studies for the most potent compounds were performed, elucidating the binding modes of the fusion molecules and the structure elements contributing to the observed high receptor binding. Furthermore, no interaction between the hybrid compounds and P-gp, the main excretory transporter of the BBB, was found. From these results, it can be inferred that the approach to deliver small neuroreceptor ligands across the BBB by transport peptide carriers is feasible.
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Affiliation(s)
- Carmen Wängler
- McConnell Brain Imaging Centre, Montreal Neurological Institute, McGill University , Montreal H3A 2B4, Canada
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19
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Application of DNA Aptamers and Quantum Dots to Lateral Flow Test Strips for Detection of Foodborne Pathogens with Improved Sensitivity versus Colloidal Gold. Pathogens 2014; 3:341-55. [PMID: 25437803 PMCID: PMC4243449 DOI: 10.3390/pathogens3020341] [Citation(s) in RCA: 132] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Revised: 03/30/2014] [Accepted: 04/01/2014] [Indexed: 12/18/2022] Open
Abstract
Preliminary studies aimed at improving the sensitivity of foodborne pathogen detection via lateral flow (LF) test strips by use of high affinity DNA aptamers for capture and reporter functions when coupled to red-emitting quantum dots (Qdot 655) are reported. A variety of DNA aptamers developed against Escherichia coli, Listeria monocytogenes, and Salmonella enterica were paired in capture and reporter combinations to determine which yielded the strongest detection of their cognate bacteria using a colloidal gold screening system. Several promising sandwich combinations were identified for each of the three bacterial LF strip systems. The best E. coli aptamer-LF system was further studied and yielded a visible limit of detection (LOD) of ~3,000 E. coli 8739 and ~6,000 E. coli O157:H7 in buffer. These LODs were reduced to ~300–600 bacterial cells per test respectively by switching to a Qdot 655 aptamer-LF system. Novel aspects of these assays such as the use of high levels of detergents to avoid quantum dot agglutination and enhance migration in analytical membranes, identification of optimal analytical membrane types, UV-immobilization of capture aptamers, and novel dual biotin/digoxigenin-end labeled aptamer streptavidin-colloidal gold or -Qdot 655 conjugates plus anti-digoxigenin antibody control lines are also discussed. In general, this work provides proof-of-principle for highly sensitive aptamer-Qdot LF strip assays for rapid foodborne pathogen detection.
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20
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Lin J, Wei Z, Zhang H, Shao M. Sensitive immunosensor for the label-free determination of tumor marker based on carbon nanotubes/mesoporous silica and graphene modified electrode. Biosens Bioelectron 2013; 41:342-7. [DOI: 10.1016/j.bios.2012.08.051] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2012] [Revised: 08/06/2012] [Accepted: 08/23/2012] [Indexed: 01/04/2023]
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21
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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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22
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Liu DS, Phipps WS, Loh KH, Howarth M, Ting AY. Quantum dot targeting with lipoic acid ligase and HaloTag for single-molecule imaging on living cells. ACS NANO 2012; 6:11080-11087. [PMID: 23181687 PMCID: PMC3528850 DOI: 10.1021/nn304793z] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We present a methodology for targeting quantum dots to specific proteins on living cells in two steps. In the first step, Escherichia coli lipoic acid ligase (LplA) site-specifically attaches 10-bromodecanoic acid onto a 13 amino acid recognition sequence that is genetically fused to a protein of interest. In the second step, quantum dots derivatized with HaloTag, a modified haloalkane dehalogenase, react with the ligated bromodecanoic acid to form a covalent adduct. We found this targeting method to be specific, fast, and fully orthogonal to a previously reported and analogous quantum dot targeting method using E. coli biotin ligase and streptavidin. We used these two methods in combination for two-color quantum dot visualization of different proteins expressed on the same cell or on neighboring cells. Both methods were also used to track single molecules of neurexin, a synaptic adhesion protein, to measure its lateral diffusion in the presence of neuroligin, its trans-synaptic adhesion partner.
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23
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Zhang P, Liu S, Gao D, Hu D, Gong P, Sheng Z, Deng J, Ma Y, Cai L. Click-Functionalized Compact Quantum Dots Protected by Multidentate-Imidazole Ligands: Conjugation-Ready Nanotags for Living-Virus Labeling and Imaging. J Am Chem Soc 2012; 134:8388-91. [DOI: 10.1021/ja302367s] [Citation(s) in RCA: 117] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Pengfei Zhang
- CAS Key
Laboratory of Health Informatics, Institute
of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced
Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
| | - Shuhui Liu
- CAS Key
Laboratory of Health Informatics, Institute
of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced
Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
| | - Duyang Gao
- CAS Key
Laboratory of Health Informatics, Institute
of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced
Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
| | - Dehong Hu
- CAS Key
Laboratory of Health Informatics, Institute
of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced
Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
| | - Ping Gong
- CAS Key
Laboratory of Health Informatics, Institute
of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced
Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
| | - Zonghai Sheng
- CAS Key
Laboratory of Health Informatics, Institute
of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced
Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
| | - Jizhe Deng
- CAS Key
Laboratory of Health Informatics, Institute
of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced
Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
| | - Yifan Ma
- CAS Key
Laboratory of Health Informatics, Institute
of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced
Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
| | - Lintao Cai
- CAS Key
Laboratory of Health Informatics, Institute
of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced
Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
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24
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Fu L, Li B, Zhang Y. Label-free fluorescence method for screening G-quadruplex ligands. Anal Biochem 2012; 421:198-202. [DOI: 10.1016/j.ab.2011.10.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2011] [Revised: 10/10/2011] [Accepted: 10/13/2011] [Indexed: 01/26/2023]
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25
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Lin J, Wei Z, Chu P. A label-free immunosensor by controlled fabrication of monoclonal antibodies and gold nanoparticles inside the mesopores. Anal Biochem 2012; 421:97-102. [DOI: 10.1016/j.ab.2011.10.018] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Revised: 09/20/2011] [Accepted: 10/11/2011] [Indexed: 12/30/2022]
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26
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Köster DM, Haselbach D, Lehrach H, Seitz H. A DNAzyme based label-free detection system for miniaturized assays. MOLECULAR BIOSYSTEMS 2011; 7:2882-9. [PMID: 21792453 DOI: 10.1039/c1mb05132f] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Sensitive detection assays are a prerequisite for the analysis of small amounts of samples derived from biological material. There is a great demand for highly sensitive and robust detection techniques to analyze biomolecules. The combination of catalytic active DNA (DNAzyme) with a peroxidase activity with rolling circle amplification (RCA) is a promising alternative to common detection systems. The rolling circle amplification leads to a product with tandemly linked copies of DNAzymes. The continuous signal generation of the amplified DNAzymes results in an increased sensitivity. The combination of two amplification reactions, namely RCA and DNAzymes, results in increased signal intensity by a factor of 10(6). With this approach the labeling of samples can be avoided. The advantage of the introduced assay is the usage of nucleic acids as biosensors for the detection of biomolecules. Coupling of the analyte molecule to the detection molecules allows the direct detection of the analyte molecule. The described label-free hotpot assay has a broad potential field of applications. The hotpot assay can be adapted to detect and analyze RNA, DNA and proteins down to femtomolar concentrations in a miniaturized platform with a total reaction solution of 50 nl. The applicability of the assay for diagnostics and research will be shown with a focus on high throughput systems using a nano-well platform.
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Affiliation(s)
- Daniela M Köster
- Max Planck Institute for Molecular Genetics, Vertebrate Genomics, Ihnestraße 63-73, 14195 Berlin, Germany
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27
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Lam JD, Culbertson MJ, Skinner NP, Barton ZJ, Burden DL. Information Content in Fluorescence Correlation Spectroscopy: Binary Mixtures and Detection Volume Distortion. Anal Chem 2011; 83:5268-74. [DOI: 10.1021/ac200641y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jonathan D. Lam
- Chemistry Department, Wheaton College, Wheaton, Illinois 60187, United States
| | | | - Nathan P. Skinner
- Chemistry Department, Wheaton College, Wheaton, Illinois 60187, United States
| | - Zachary J. Barton
- Chemistry Department, Wheaton College, Wheaton, Illinois 60187, United States
| | - Daniel L. Burden
- Chemistry Department, Wheaton College, Wheaton, Illinois 60187, United States
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28
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Islam MS, Kang SH. Chemiluminescence detection of label-free C-reactive protein based on catalytic activity of gold nanoparticles. Talanta 2011; 84:752-8. [DOI: 10.1016/j.talanta.2011.02.001] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2010] [Revised: 01/31/2011] [Accepted: 02/01/2011] [Indexed: 11/29/2022]
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29
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Gaster RS, Xu L, Han SJ, Wilson RJ, Hall DA, Osterfeld SJ, Yu H, Wang SX. Quantification of protein interactions and solution transport using high-density GMR sensor arrays. NATURE NANOTECHNOLOGY 2011; 6:314-20. [PMID: 21478869 PMCID: PMC3089684 DOI: 10.1038/nnano.2011.45] [Citation(s) in RCA: 145] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2010] [Accepted: 03/08/2011] [Indexed: 05/19/2023]
Abstract
Monitoring the kinetics of protein interactions on a high-density sensor array is vital to drug development and proteomic analysis. Label-free kinetic assays based on surface plasmon resonance are the current gold standard, but they have poor detection limits, suffer from non-specific binding, and are not amenable to high-throughput analyses. Here, we show that magnetically responsive nanosensors that have been scaled to over 100,000 sensors per cm² can be used to measure the binding kinetics of various proteins with high spatial and temporal resolution. We present an analytical model that describes the binding of magnetically labelled antibodies to proteins that are immobilized on the sensor surface. This model is able to quantify the kinetics of antibody-antigen binding at sensitivities as low as 20 zeptomoles of solute.
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Affiliation(s)
- Richard S. Gaster
- Department of Bioengineering, Stanford University, CA 94305, USA
- Medical Scientist Training Program, School of Medicine, Stanford University, CA 94305, USA
| | - Liang Xu
- Department of Materials Science and Engineering, Stanford University, CA 94305, USA
| | - Shu-Jen Han
- IBM T.J. Watson Research Center, Yorktown Heights, NY 10598
| | - Robert J. Wilson
- Department of Materials Science and Engineering, Stanford University, CA 94305, USA
| | - Drew A. Hall
- Department of Electrical Engineering, Stanford University, CA 94305, USA
| | | | - Heng Yu
- MagArray Inc., Sunnyvale, CA 94089
| | - Shan X. Wang
- Department of Materials Science and Engineering, Stanford University, CA 94305, USA
- Department of Electrical Engineering, Stanford University, CA 94305, USA
- Correspondence and requests for materials should be addressed to: Shan X. Wang (), Stanford Center for Magnetic Nanotechnology, Phone: 650-723-8671, Mail address: Geballe Laboratory for Advanced Materials, McCullough Building, Room 351, 476 Lomita Mall, Stanford University, Stanford, CA 94305-4045
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30
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Clarke S, Tamang S, Reiss P, Dahan M. A simple and general route for monofunctionalization of fluorescent and magnetic nanoparticles using peptides. NANOTECHNOLOGY 2011; 22:175103. [PMID: 21411925 DOI: 10.1088/0957-4484/22/17/175103] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Nanoparticles are now utilized in many diverse biological and medical applications. Despite this, it remains challenging to tailor their surface for specific molecular targeting while maintaining high biocompatibility. To address this problem, we evaluate a phytochelatin-related peptide surface coating to produce functional and biocompatible nanoparticles (NPs) based on fluorescent InP/ZnS and CdSe/ZnS or superparamagnetic FePt and Fe(3)O(4). Using a combination of transmission electron microscopy, size-exclusion chromatography and gel electrophoresis (GE), we demonstrate the excellent colloidal properties of the peptide-coated NPs (pNPs) and the compact nature of the coating (∼4 nm thickness). We develop a simple protocol for the monofunctionalization of the pNPs with targeting biomolecules, by combining covalent conjugation with GE purification. We then employ functionalized InP/ZnS pNPs in a live-cell, single-molecule imaging application to specifically target and detect individual proteins in the cell membrane. These findings showcase the versatility of the peptides for preparing compact NPs of various compositions and sizes, which are easily functionalized, and suitable for a broad range of biomedical applications.
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Affiliation(s)
- Samuel Clarke
- Laboratoire Kastler Brossel, CNRS UMR 8552, Département de Physique et Institut de Biologie, Ecole Normale Supérieure, Université Pierre et Marie Curie (Paris6), 46 rue d'Ulm 75005 Paris, France.
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31
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Abstract
Quantum dots are semiconductor nanocrystals that have broad excitation spectra, narrow emission spectra, tunable emission peaks, long fluorescence lifetimes, negligible photobleaching, and ability to be conjugated to proteins, making them excellent probes for bioimaging applications. Here the author reviews the advantages and disadvantages of using quantum dots in bioimaging applications, such as single-particle tracking and fluorescence resonance energy transfer, to study receptor-mediated transport.
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Affiliation(s)
- Margarida M Barroso
- Center for Cardiovascular Sciences, Albany Medical College, 47 New Scotland Avenue, Albany, NY 12208, USA.
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32
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Liu HY, Gao X. Engineering Monovalent Quantum Dot−Antibody Bioconjugates with a Hybrid Gel System. Bioconjug Chem 2011; 22:510-7. [DOI: 10.1021/bc200004z] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Hong Yan Liu
- Department of Bioengineering, University of Washington, William H. Foege Building N530M, Seattle, Washington 98195, United States
| | - Xiaohu Gao
- Department of Bioengineering, University of Washington, William H. Foege Building N530M, Seattle, Washington 98195, United States
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33
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Clarke S, Pinaud F, Beutel O, You C, Piehler J, Dahan M. Covalent monofunctionalization of peptide-coated quantum dots for single-molecule assays. NANO LETTERS 2010; 10:2147-2154. [PMID: 20433164 DOI: 10.1021/nl100825n] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Fluorescent probes for biological imaging of single molecules (SM) have many stringent design requirements. In the case of quantum dot (QD) probes, it remains a challenge to control their functional properties with high precision. Here, we describe the simple preparation of QDs with reduced size and monovalency. Our approach combines a peptide surface coating, stable covalent conjugation of targeting units and purification by gel electrophoresis. We precisely characterize these probes by ensemble and SM techniques and apply them to tracking individual proteins in living cells.
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Affiliation(s)
- Samuel Clarke
- Laboratoire Kastler Brossel, CNRS UMR 8552, Département de Physique et Biologie, Ecole Normale Supérieure, Université Pierre et Marie Curie (Paris6), 46 rue d'Ulm 75005 Paris, France
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Pinaud F, Clarke S, Sittner A, Dahan M. Probing cellular events, one quantum dot at a time. Nat Methods 2010; 7:275-85. [DOI: 10.1038/nmeth.1444] [Citation(s) in RCA: 338] [Impact Index Per Article: 24.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Measuring properties of nanoparticles in embryonic blood vessels: Towards a physicochemical basis for nanotoxicity. Chem Phys Lett 2010. [DOI: 10.1016/j.cplett.2010.02.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Dif A, Boulmedais F, Pinot M, Roullier V, Baudy-Floc'h M, Coquelle FM, Clarke S, Neveu P, Vignaux F, Le Borgne R, Dahan M, Gueroui Z, Marchi-Artzner V. Small and stable peptidic PEGylated quantum dots to target polyhistidine-tagged proteins with controlled stoichiometry. J Am Chem Soc 2010; 131:14738-46. [PMID: 19788248 DOI: 10.1021/ja902743u] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The use of the semiconductor quantum dots (QD) as biolabels for both ensemble and single-molecule tracking requires the development of simple and versatile methods to target individual proteins in a controlled manner, ideally in living cells. To address this challenge, we have prepared small and stable QDs (QD-ND) using a surface coating based on a peptide sequence containing a tricysteine, poly(ethylene glycol) (PEG), and an aspartic acid ligand. These QDs, with a hydrodynamic diameter of 9 +/- 1.5 nm, can selectively bind to polyhistidine-tagged (histag) proteins in vitro or in living cells. We show that the small and monodisperse size of QD-ND allows for the formation of QD-ND/histag protein complexes of well-defined stoichiometry and that the 1:1 QD/protein complex can be isolated and purified by gel electrophoresis without any destabilization in the nanomolar concentration range. We also demonstrate that QD-ND can be used to specifically label a membrane receptor with an extracellular histag expressed in living HeLa cells. Here, cytotoxicity tests reveal that cell viability remains high under the conditions required for cellular labeling with QD-ND. Finally, we apply QD-ND complexed with histag end binding protein-1 (EB1), a microtubule associated protein, to single-molecule tracking in Xenopus extracts. Specific colocalization of QD-ND/EB1 with microtubules during the mitotic spindle formation demonstrates that QD-ND and our labeling strategy provide an efficient approach to monitor the dynamic behavior of proteins involved in complex biological functions.
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Affiliation(s)
- Aurélien Dif
- Université de Rennes 1, CNRS UMR 6226, Sciences Chimiques de Rennes, Rennes, France
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Heider EC, Barhoum M, Peterson EM, Schaefer J, Harris JM. Identification of single fluorescent labels using spectroscopic microscopy. APPLIED SPECTROSCOPY 2010; 64:37-45. [PMID: 20132596 DOI: 10.1366/000370210790572034] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Detection of single, fluorescently labeled biomolecules is providing a powerful approach to measuring molecular transport, biomolecular interactions, and localization in biological systems. Because the biological molecules of interest rarely exhibit sufficient intrinsic fluorescence to allow observation of individual molecules, they are usually labeled with fluorescent dye molecules, fluorescent proteins, semiconductor nanocrystals or quantum dots, or fluorescently doped silica or polymer nanospheres to allow their detection. Differences in the photophysical and spectral properties of different labels allow one to identify individual molecules by distinguishing their corresponding labels. A simple approach to measuring fluorescence spectra of individual fluorescent labels can be implemented in a standard wide-field fluorescence microscope, where a grating or prism is incorporated into the path from the microscope to an imaging detector to disperse the emission spectrum. In this work, principal components and cluster analysis are applied to the identification of fluorescence spectra from single fluorescent labels, with statistical tests of the classification results. Spectra are determined from diffracted images of fluorescent nanospheres labels, where emission maxima are separated by less than 20 nm, and of single dye-molecule labels with 30 nm separation. Clusters of points in an eigenvector representation of the spectra correctly classify known labels (both nanospheres and single molecules) and unambiguously identify unknown labels in mixtures.
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Affiliation(s)
- Emily C Heider
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850, USA
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Soukka T, Härmä H. Lanthanide Nanoparticules as Photoluminescent Reporters. LANTHANIDE LUMINESCENCE 2010. [DOI: 10.1007/4243_2010_11] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Qi Y, Li B, Zhang Z. Label-free and homogeneous DNA hybridization detection using gold nanoparticles-based chemiluiminescence system. Biosens Bioelectron 2009; 24:3581-6. [DOI: 10.1016/j.bios.2009.05.021] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2009] [Revised: 05/14/2009] [Accepted: 05/19/2009] [Indexed: 11/26/2022]
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Swift JL, Burger MC, Cramb DT. A quantum dot-labeled ligand-receptor binding assay for G protein-coupled receptors contained in minimally purified membrane nanopatches. Methods Mol Biol 2009; 552:329-41. [PMID: 19513661 DOI: 10.1007/978-1-60327-317-6_24] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A robust method to directly measure ligand-receptor binding interactions using fluorescence cross-correlation spectroscopy (FCCS) is described. The example receptor systems demonstrated here are the human micro-opioid receptor, a representative G protein-coupled receptor (GPCR), and Streptavidin, but these general protocols can be extended for the analysis of many membrane receptors. We present methods for the preparation of GPCR-containing membrane nanopatches that appear to have the shapes of nanovesicles, labeling of proteins in membrane vesicles, in addition to the coupling of quantum dots (QDs) to peptide ligands. Further, we demonstrate that reliable binding information can be obtained from these partially purified receptors.
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Affiliation(s)
- Jody L Swift
- Department of Chemistry, McGill University, Montreal, QC, Canada
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Sanyal A, Bala T, Ahmed S, Singh A, Piterina AV, McGloughlin TM, Laffir FR, Ryan KM. Water dispersible semiconductor nanorod assemblies via a facile phase transfer and their application as fluorescent biomarkers. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b913476j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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