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Preeyanka N, Akhuli A, Dey H, Chakraborty D, Rahaman A, Sarkar M. Realization of a Model-Free Pathway for Quantum Dot-Protein Interaction Beyond Classical Protein Corona or Protein Complex. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:10704-10715. [PMID: 35970517 DOI: 10.1021/acs.langmuir.2c01789] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Although in recent times nanoparticles (NPs) are being used in various biological applications, their mechanism of binding interactions still remains hazy. Usually, the binding mechanism is perceived to be mediated through either the protein corona (PC) or protein complex (PCx). Herein, we report that the nanoparticle (NP)-protein interaction can also proceed via a different pathway without forming the commonly observed PC or PCx. In the present study, the NP-protein interaction between less-toxic zinc-silver-indium-sulfide (ZAIS) quantum dots (QDs) and bovine serum albumin (BSA) was investigated by employing spectroscopic and microscopic techniques. Although the analyses of data obtained from fluorescence and thermodynamic studies do indicate the binding between QDs and BSA, they do not provide clear experimental evidence in favor of PC or PCx. Quite interestingly, high-resolution transmission electron microscopy (HRTEM) studies have shown the formation of a new type of species where BSA protein molecules are adsorbed onto some portion of a QD surface rather than the entire surface. To the best of our knowledge, we believe that this is the first direct experimental evidence in favor of a model-free pathway for NP-protein interaction events. Thus, the outcome of the present study, through experimental evidence, clearly suggests that NP-protein interaction can proceed by following a pathway that is different from classical PC and PCx.
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Affiliation(s)
- Naupada Preeyanka
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Jatni, Khurda, Bhubaneswar, 752050 Odisha, India
- Centre for Interdisciplinary Sciences (CIS), NISER, Jatni, Khurda, Bhubaneswar, 752050 Odisha, India
| | - Amit Akhuli
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Jatni, Khurda, Bhubaneswar, 752050 Odisha, India
- Centre for Interdisciplinary Sciences (CIS), NISER, Jatni, Khurda, Bhubaneswar, 752050 Odisha, India
| | - Himani Dey
- School of Biological Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Jatni, Khurda, Bhubaneswar, 752050 Odisha, India
- Centre for Interdisciplinary Sciences (CIS), NISER, Jatni, Khurda, Bhubaneswar, 752050 Odisha, India
| | - Debabrata Chakraborty
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Jatni, Khurda, Bhubaneswar, 752050 Odisha, India
- Centre for Interdisciplinary Sciences (CIS), NISER, Jatni, Khurda, Bhubaneswar, 752050 Odisha, India
| | - Abdur Rahaman
- School of Biological Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Jatni, Khurda, Bhubaneswar, 752050 Odisha, India
- Centre for Interdisciplinary Sciences (CIS), NISER, Jatni, Khurda, Bhubaneswar, 752050 Odisha, India
| | - Moloy Sarkar
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Jatni, Khurda, Bhubaneswar, 752050 Odisha, India
- Centre for Interdisciplinary Sciences (CIS), NISER, Jatni, Khurda, Bhubaneswar, 752050 Odisha, India
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Razavi M, Kompany-Zareh M, Khoshkam M. PARAFAC study of L-cys@CdTe QDs interaction to BSA, cytochrome c and trypsin: An approach through electrostatic and covalent bonds. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 246:119016. [PMID: 33038854 DOI: 10.1016/j.saa.2020.119016] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 09/23/2020] [Accepted: 09/25/2020] [Indexed: 06/11/2023]
Abstract
Utilizing fluorescence spectroscopy, non-covalent and covalent interactions of L-cys@CdTe quantum dots to bovine serum albumin (BSA), cytochrome c and trypsin were investigated. L-cys@CdTe QDs with the emission maximum at 530 nm and an average diameter of 2.6 nm were synthesized in the aqueous medium. Formaldehyde, N-(3-dimethylaminopropyl)-N-ethylcarbodiimide hydrochloride (EDC) with N-hydroxysuccinimide (NHS), and glutaraldehyde was applied as cross-linkers. In the case of both electrostatic and covalent strategies PARAFAC, as a powerful multi-way chemometrics technique, was utilized to analyze fluorescence excitation-emission (EEM) spectra. For non-covalent and covalent bonding, two and three significant components composed the PARAFAC models. Resolved EEM shows that in the presence of formaldehyde, a new component with an emission peak similar to BSA was obtained. Using EDC-NHS cross-linker, the fluorescence peak of the newly formed component was in a distinct wavelength with similar emission intensity, compared to L-cys@CdTe QDs and BSA. Employing glutaraldehyde, a distinguished component was easily detected at emission wavelengths higher than that of L-cys@CdTe QDs and proteins. It was concluded that the choice of cross-linker is a critical step to create different emission spectra when dealing with nano-bio-conjugations. This study shows that glutaraldehyde cross-linker leads to increase sensitivity, selectivity, and accuracy of protein analysis.
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Affiliation(s)
- Mehri Razavi
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences, Zanjan 45137-66731, Iran
| | - Mohsen Kompany-Zareh
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences, Zanjan 45137-66731, Iran; Department of Chemistry, Dalhousie University, 6274 Coburg Road, P.O. Box 1500, Halifax, NS B3H 4R2, Canada.
| | - Maryam Khoshkam
- Department of Chemistry, ّFaculty of Science, University of Mohaghegh Ardabili, 56199-11367, Ardabil, Iran
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3
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Banerjee S, Kistwal T, Sajeevan A, Datta A. Release of Warfarin from Human Serum Albumin by Water‐soluble CdSe Nanotetrapods. Chemphyschem 2020; 21:2709-2714. [DOI: 10.1002/cphc.202000292] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 09/27/2020] [Indexed: 01/03/2023]
Affiliation(s)
- Sucheta Banerjee
- Department of Chemistry Indian Institute of Technology Bombay Powai, Mumbai 400 076 India
| | - Tanuja Kistwal
- Department of Chemistry Indian Institute of Technology Bombay Powai, Mumbai 400 076 India
| | - Amritha Sajeevan
- Department of Chemical Sciences Indian Institute of Science Education and Research Kolkata Campus Rd Mohanpur, West Bengal 741246 India
| | - Anindya Datta
- Department of Chemistry Indian Institute of Technology Bombay Powai, Mumbai 400 076 India
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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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Basiri H, Abouei Mehrizi A, Ghaee A, Farokhi M, Chekini M, Kumacheva E. Carbon Dots Conjugated with Vascular Endothelial Growth Factor for Protein Tracking in Angiogenic Therapy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:2893-2900. [PMID: 32125865 DOI: 10.1021/acs.langmuir.9b03980] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
One of the challenges of using growth factors for tissue regeneration is to monitor their biodistributions and delivery to injured tissues for minimally invasive detection. In the present study, tracking of human vascular endothelial growth factor (VEGF) was achieved by chemically linking it to photoluminescent carbon dots (CDs). Carbon dots were synthesized by the hydrothermal method and, subsequently, conjugated with VEGF using carbodiimide coupling. ELISA and western blot analysis revealed that VEGF-conjugated CDs preserve the binding affinity of VEGF to its antibodies. We also show that VEGF-conjugated CDs maintain the functionality of VEGF for tube formation and cell migration. The VEGF-conjugated CDs were also used for in vitro imaging of human umbilical vein endothelial cells. The results of this work suggest that cell-penetrating VEGF-conjugated CDs can be used for growth factor protein tracking in therapeutic and tissue engineering applications.
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Affiliation(s)
- Hamideh Basiri
- Faculty of New Sciences and Technologies, Department of Life Science Engineering, University of Tehran, Tehran 1439957131, Iran
- Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada
| | - Ali Abouei Mehrizi
- Faculty of New Sciences and Technologies, Department of Life Science Engineering, University of Tehran, Tehran 1439957131, Iran
| | - Azadeh Ghaee
- Faculty of New Sciences and Technologies, Department of Life Science Engineering, University of Tehran, Tehran 1439957131, Iran
| | - Mehdi Farokhi
- National Cell Bank of Iran, Pasteur Institute of Iran, Tehran 1316943551, Iran
| | - Mahshid Chekini
- Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada
| | - Eugenia Kumacheva
- Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, 4 Taddle Creek Road, Toronto, Ontario M5S 3G9, Canada
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario M5S 3E5, Canada
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Akshath US, Bhatt P, Singh SA. Differential Interaction of Metal Ions with Gold Nanoclusters and Application in Detection of Cobalt and Cadmium. J Fluoresc 2020; 30:537-545. [PMID: 32185584 DOI: 10.1007/s10895-020-02509-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Accepted: 02/14/2020] [Indexed: 01/01/2023]
Abstract
Interest in biosensing platforms using protein fluorescent gold nanoclusters (FGNCs) has grown significantly in the past due to the unique optical properties they offer. This study investigates the interaction of metal ions with FGNCs, and the structural modifications brought about by the interaction resulting in fluorescence changes of the cluster and its successful application in the detection of two heavy metals, cobalt and cadmium. The binding of cobalt and cadmium to FGNCs synthesized from BSA significantly altered the secondary structure of the protein, causing a change in its hydrophobicity. It also resulted in a change in fluorescence properties of FGNCs by intersystem crossing (ICT) and fluorescence resonance energy transfer (FRET). Cobalt and cadmium could successfully be detected in the range of 5-165 ng/mL (R2 = 0.95) and 20-1000 ng/ mL (R2 = 0.91), respectively, with appreciable sensitivity. The principle was also applied for the detection of Vitamin B12 in commercially available ampoules, validating the proposed method. Graphical Abstract Proposed detection method of cadmium and cobalt using FGNCs.
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Affiliation(s)
- Uchangi Satyaprasad Akshath
- Academy of Scientific and Innovative Research (AcSIR), New Delhi, India
- Microbiology & Fermentation Technology Department, Central Food Technological Research Institute, Mysore, 570020, India
| | - Praveena Bhatt
- Academy of Scientific and Innovative Research (AcSIR), New Delhi, India.
- Microbiology & Fermentation Technology Department, Central Food Technological Research Institute, Mysore, 570020, India.
| | - Sridevi Annapurna Singh
- Academy of Scientific and Innovative Research (AcSIR), New Delhi, India
- Department of Protein Chemistry & Technology, CSIR- Central Food Technological Research Institute (CFTRI), Mysuru, 570020, India
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7
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Oviedo MJ, Quester K, Hirata GA, Vazquez-Duhalt R. Determination of conjugated protein on nanoparticles by an adaptation of the Coomassie blue dye method. MethodsX 2019; 6:2134-2140. [PMID: 31667112 PMCID: PMC6812394 DOI: 10.1016/j.mex.2019.09.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 09/12/2019] [Indexed: 12/30/2022] Open
Abstract
A new accurate spectrophotometric method for protein determination on nanoparticles is described. The method is based on the Coomassie blue dye that binds to the basic and aromatic amino acid residues of proteins, especially arginine and lysine. A known amount of reagent dye was mixed with a variety of protein-loaded nanoparticles. Thereafter the unconjugated reagent was mixed with excess protein (bovine serum albumin) and titrated. In this method, the reacted dye on the protein coating of nanoparticle is directly determined, in opposite to the conventional method, in which the conjugated protein is determined as the difference between the non-conjugated protein found in the supernatant after centrifugation, and the total amount of protein originally used. This method is able to measure amounts of coated protein lower than 1 ppm. Simple and accurate method especially adapted for protein-coated nanoparticles. The amino acid residues of protein in the nanoparticle surface react with Coomassie brilliant blue dye. The unreacted dye is titrated with an excess of a standard protein.
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Affiliation(s)
- Mariana J Oviedo
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Km 107 Carretera Ensenada-Tijuana, CP 22800, Ensenada, Baja California, Mexico
| | - Katrin Quester
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Km 107 Carretera Ensenada-Tijuana, CP 22800, Ensenada, Baja California, Mexico
| | - Gustavo A Hirata
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Km 107 Carretera Ensenada-Tijuana, CP 22800, Ensenada, Baja California, Mexico
| | - Rafael Vazquez-Duhalt
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Km 107 Carretera Ensenada-Tijuana, CP 22800, Ensenada, Baja California, Mexico
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8
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Guerrini L, Alvarez-Puebla RA, Pazos-Perez N. Surface Modifications of Nanoparticles for Stability in Biological Fluids. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E1154. [PMID: 29986436 PMCID: PMC6073273 DOI: 10.3390/ma11071154] [Citation(s) in RCA: 236] [Impact Index Per Article: 39.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 06/29/2018] [Accepted: 07/02/2018] [Indexed: 02/06/2023]
Abstract
Due to the high surface: volume ratio and the extraordinary properties arising from the nanoscale (optical, electric, magnetic, etc.), nanoparticles (NPs) are excellent candidates for multiple applications. In this context, nanoscience is opening a wide range of modern technologies in biological and biomedical fields, among others. However, one of the main drawbacks that still delays its fast evolution and effectiveness is related to the behavior of nanomaterials in the presence of biological fluids. Unfortunately, biological fluids are characterized by high ionic strengths which usually induce NP aggregation. Besides this problem, the high content in biomacromolecules—such as lipids, sugars, nucleic acids and, especially, proteins—also affects NP stability and its viability for some applications due to, for example, the formation of the protein corona around the NPs. Here, we will review the most common strategies to achieve stable NPs dispersions in high ionic strength fluids and, also, antifouling strategies to avoid the protein adsorption.
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Affiliation(s)
- Luca Guerrini
- Departamento de Quimica Fisica e Inorganica and EMaS, Universitat Rovira i Virgili Carrer de Marcel•lí Domingo s/n, 43007 Tarragona, Spain.
| | - Ramon A Alvarez-Puebla
- Departamento de Quimica Fisica e Inorganica and EMaS, Universitat Rovira i Virgili Carrer de Marcel•lí Domingo s/n, 43007 Tarragona, Spain.
- Institución Catalana de Investigación y Estudios Avanzados, Passeig Lluís Companys 23, 08010 Barcelona, Spain.
| | - Nicolas Pazos-Perez
- Departamento de Quimica Fisica e Inorganica and EMaS, Universitat Rovira i Virgili Carrer de Marcel•lí Domingo s/n, 43007 Tarragona, Spain.
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Hong S, Lee C. The Current Status and Future Outlook of Quantum Dot-Based Biosensors for Plant Virus Detection. THE PLANT PATHOLOGY JOURNAL 2018; 34:85-92. [PMID: 29628814 PMCID: PMC5880352 DOI: 10.5423/ppj.rw.08.2017.0184] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 01/14/2018] [Accepted: 01/18/2018] [Indexed: 05/23/2023]
Abstract
Enzyme-linked immunosorbent assay (ELISA) and polymerase chain reaction (PCR), widely used for the detection of plant viruses, are not easily performed, resulting in a demand for an innovative and more efficient diagnostic method. This paper summarizes the characteristics and research trends of biosensors focusing on the physicochemical properties of both interface elements and bioconjugates. In particular, the topological and photophysical properties of quantum dots (QDs) are discussed, along with QD-based biosensors and their practical applications. The QD-based Fluorescence Resonance Energy Transfer (FRET) genosensor, most widely used in the biomolecule detection fields, and QD-based nanosensor for Rev-RRE interaction assay are presented as examples. In recent years, QD-based biosensors have emerged as a new class of sensor and are expected to open opportunities in plant virus detection, but as yet there have been very few practical applications (Table 3). In this article, the details of those cases and their significance for the future of plant virus detection will be discussed.
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Affiliation(s)
| | - Cheolho Lee
- Corresponding author. Phone) +82-2-940-7188, E-mail)
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10
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Metal-enhanced luminescence: Current trend and future perspectives- A review. Anal Chim Acta 2017; 971:1-13. [DOI: 10.1016/j.aca.2017.03.051] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 03/22/2017] [Accepted: 03/23/2017] [Indexed: 01/06/2023]
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Zhou C, Chen Q, Wang G, Guan A, Xu J, Liu X, Shi Z, Zhou L. One-pot synthesis of CdSe@CdS core@shell quantum dots and their photovoltaics application in quantum-dot-sensitized ZnO nanorods. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2016.08.035] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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12
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Kotresh MG, Inamdar LS, Shivkumar MA, Adarsh KS, Jagatap BN, Mulimani BG, Advirao GM, Inamdar SR. Interaction and energy transfer studies between bovine serum albumin and CdTe quantum dots conjugates: CdTe QDs as energy acceptor probes. LUMINESCENCE 2016; 32:631-639. [DOI: 10.1002/bio.3231] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 09/06/2016] [Accepted: 09/08/2016] [Indexed: 12/23/2022]
Affiliation(s)
- M. G. Kotresh
- Laser Spectroscopy Programme, Department of Physics and UGC-Centre with Potential for Excellence (CPEPA); Karnatak University; Dharwad India
| | - L. S. Inamdar
- Molecular Endocrinology and Development Laboratory, Department of Zoology, and UGC-CPEPA; Karnatak University; Dharwad India
| | - M. A. Shivkumar
- Laser Spectroscopy Programme, Department of Physics and UGC-Centre with Potential for Excellence (CPEPA); Karnatak University; Dharwad India
| | - K. S. Adarsh
- Laser Spectroscopy Programme, Department of Physics and UGC-Centre with Potential for Excellence (CPEPA); Karnatak University; Dharwad India
| | - B. N. Jagatap
- Chemistry Division; Bhabha Atomic Research Centre; Trombay Mumbai India
| | | | - G. M. Advirao
- Department of Biochemistry; Davangere University; Davangere India
| | - S. R. Inamdar
- Laser Spectroscopy Programme, Department of Physics and UGC-Centre with Potential for Excellence (CPEPA); Karnatak University; Dharwad India
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13
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Qiu Z, Shu J, He Y, Lin Z, Zhang K, Lv S, Tang D. CdTe/CdSe quantum dot-based fluorescent aptasensor with hemin/G-quadruplex DNzyme for sensitive detection of lysozyme using rolling circle amplification and strand hybridization. Biosens Bioelectron 2016; 87:18-24. [PMID: 27504793 DOI: 10.1016/j.bios.2016.08.003] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 07/29/2016] [Accepted: 08/02/2016] [Indexed: 12/12/2022]
Abstract
Lysozyme with a small monomeric globular enzymatic protein is part of the innate immune system, and its deficiency can cause the increased incidence of disease. Herein, we devise a new signal-enhanced fluorescence aptasensing platform for quantitative screening of lysozyme by coupling with rolling circle amplification (RCA) and strand hybridization reaction, accompanying the assembly of CdTe/CdSe quantum dots (QDs) and hemin/G-quadruplex DNzyme. Initially, target-triggered release of the primer was carried out from DNA duplex via the reaction of the aptamer with the analyte, and the released primer could be then utilized as the template to produce numerous repeated oligonucleotide sequences by the RCA reaction. Following that, the formed long-stranded DNA simultaneously hybridized with the CdTe/CdSe QD-labeled probe and hemin/G-quadruplex DNzyme strand in the system, thereby resulting in the quenching of QD fluorescent signal through the proximity hemin/G-quadruplex DNzyme on the basis of transferring photoexcited conduction band electrons of quantum dots to Fe(III)/Fe(II)-protoporphyrin IX (hemin) complex. Under optimal conditions, the fluorescent signal decreased with the increasing target lysozyme within the dynamic range from 5.0 to 500nM with a detection limit (LOD) of 2.6nM at the 3sblank criterion. Intra-assay and interassay coefficients of variation (CVs) were below 8.5% and 11.5%, respectively. Finally, the system was applied to analyze spiked human serum samples, and the recoveries in all cases were 85-111.9%.
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Affiliation(s)
- Zhenli Qiu
- Key Laboratory of Analysis and Detection for Food Safety (MOE & Fujian Province), Institute of Nanomedicine and Nanobiosensing, Department of Chemistry, Fuzhou University, Fuzhou, 350108 People's Republic of China
| | - Jian Shu
- Key Laboratory of Analysis and Detection for Food Safety (MOE & Fujian Province), Institute of Nanomedicine and Nanobiosensing, Department of Chemistry, Fuzhou University, Fuzhou, 350108 People's Republic of China
| | - Yu He
- Key Laboratory of Analysis and Detection for Food Safety (MOE & Fujian Province), Institute of Nanomedicine and Nanobiosensing, Department of Chemistry, Fuzhou University, Fuzhou, 350108 People's Republic of China.
| | - Zhenzhen Lin
- Key Laboratory of Analysis and Detection for Food Safety (MOE & Fujian Province), Institute of Nanomedicine and Nanobiosensing, Department of Chemistry, Fuzhou University, Fuzhou, 350108 People's Republic of China
| | - Kangyao Zhang
- Key Laboratory of Analysis and Detection for Food Safety (MOE & Fujian Province), Institute of Nanomedicine and Nanobiosensing, Department of Chemistry, Fuzhou University, Fuzhou, 350108 People's Republic of China
| | - Shuzhen Lv
- Key Laboratory of Analysis and Detection for Food Safety (MOE & Fujian Province), Institute of Nanomedicine and Nanobiosensing, Department of Chemistry, Fuzhou University, Fuzhou, 350108 People's Republic of China
| | - Dianping Tang
- Key Laboratory of Analysis and Detection for Food Safety (MOE & Fujian Province), Institute of Nanomedicine and Nanobiosensing, Department of Chemistry, Fuzhou University, Fuzhou, 350108 People's Republic of China.
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Pandey SK, Rishi P, Suri CR, Vinayaka AC. Anodic stripping voltammetry of anti-Vi antibody functionalized CdTe quantum dots for the specific monitoring of Salmonella enterica serovar Typhi. RSC Adv 2015. [DOI: 10.1039/c5ra13465j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
CdTe QD based stripping voltammetry for Vi capsular polysaccharide detection. The technique has provided an insight into the competence of CdTe QD and GNP immuno-conjugates. This is a novel approach to characterize the efficiency of immuno-conjugates of QDs and GNPs.
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Affiliation(s)
- Satish K. Pandey
- CSIR-Institute of Microbial Technology
- Chandigarh-160036
- India
- Department of Microbiology
- Panjab University
| | - Praveen Rishi
- Department of Microbiology
- Panjab University
- Chandigarh-160014
- India
| | - C. Raman Suri
- CSIR-Institute of Microbial Technology
- Chandigarh-160036
- India
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15
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Study of the bioconjugation of ternary alloyed ZnCdTe nanocrystals to Concanavalin A. J Photochem Photobiol A Chem 2014. [DOI: 10.1016/j.jphotochem.2014.09.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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16
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Alibolandi M, Abnous K, Ramezani M, Hosseinkhani H, Hadizadeh F. Synthesis of AS1411-aptamer-conjugated CdTe quantum dots with high fluorescence strength for probe labeling tumor cells. J Fluoresc 2014; 24:1519-29. [PMID: 25172439 DOI: 10.1007/s10895-014-1437-5] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Accepted: 08/11/2014] [Indexed: 12/28/2022]
Abstract
In this paper, we report microwave-assisted, one-stage synthesis of high-quality functionalized water-soluble cadmium telluride (CdTe) quantum dots (QDs). By selecting sodium tellurite as the Te source, cadmium chloride as the Cd source, mercaptosuccinic acid (MSA) as the capping agent, and a borate-acetic acid buffer solution with a pH range of 5-8, CdTe nanocrystals with four colors (blue to orange) were conveniently prepared at 100 °C under microwave irradiation in less than one hour (reaction time: 10-60 min). The influence of parameters such as the pH, Cd:Te molar ratio, and reaction time on the emission range and quantum yield percentage (QY%) was investigated. The structures and compositions of the prepared CdTe QDs were characterized by transmission electron microscopy, energy-dispersive X-ray spectroscopy, selective area electron diffraction, and X-ray powder diffraction experiments. The formation mechanism of the QDs is discussed in this paper. Furthermore, AS1141-aptamer-conjugated CdTe QDs in the U87MG glioblastoma cell line were assessed with a fluorescence microscope. The obtained results showed that the best conditions for obtaining a high QY of approximately 87% are a pH of 6, a Cd:Te molar ratio of 5:1, and a 30-min reaction time at 100 °C under microwave irradiation. The results showed that AS1141-aptamer-conjugated CdTe QDs could enter tumor cells efficiently. It could be concluded that a facile high-fluorescence-strength QD conjugated with a DNA aptamer, AS1411, which can recognize the extracellular matrix protein nucleolin, can specifically target U87MG human glioblastoma cells. The qualified AS1411-aptamer-conjugated QDs prepared in this study showed excellent capabilities as nanoprobes for cancer targeting and molecular imaging.
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Affiliation(s)
- Mona Alibolandi
- Biotechnology Research Center, School of Pharmacy, Mashhad University of Medical Sciences, P.O.Box 9196773117, Mashhad, Iran
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Quantum dots as optical labels for ultrasensitive detection of polyphenols. Biosens Bioelectron 2014; 57:317-23. [DOI: 10.1016/j.bios.2014.01.038] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Revised: 12/20/2013] [Accepted: 01/20/2014] [Indexed: 11/21/2022]
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Pang L, Xu J, Shu C, Guo J, Ma X, Liu Y, Zhong W. Characterization and cancer cell targeted imaging properties of human antivascular endothelial growth factor monoclonal antibody conjugated CdTe/ZnS quantum dots. LUMINESCENCE 2014; 29:1177-82. [DOI: 10.1002/bio.2679] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Revised: 02/27/2014] [Accepted: 03/21/2014] [Indexed: 12/31/2022]
Affiliation(s)
- Lili Pang
- Department of Analytical Chemistry; China Pharmaceutical University; Nanjing 210009 People's Republic of China
| | - Jian Xu
- Department of Biochemistry; School of Life Science and Technology; China Pharmaceutical University; Nanjing 210009 People's Republic of China
| | - Chang Shu
- Department of Analytical Chemistry; China Pharmaceutical University; Nanjing 210009 People's Republic of China
| | - Jin Guo
- Department of Analytical Chemistry; China Pharmaceutical University; Nanjing 210009 People's Republic of China
| | - Xiaona Ma
- Department of Analytical Chemistry; China Pharmaceutical University; Nanjing 210009 People's Republic of China
| | - Yu Liu
- Department of Biochemistry; School of Life Science and Technology; China Pharmaceutical University; Nanjing 210009 People's Republic of China
| | - Wenying Zhong
- Department of Analytical Chemistry; China Pharmaceutical University; Nanjing 210009 People's Republic of China
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Silva ACA, da Silva SW, Morais PC, Dantas NO. Shell thickness modulation in ultrasmall CdSe/CdS(x)Se(1-x)/CdS core/shell quantum dots via 1-thioglycerol. ACS NANO 2014; 8:1913-1922. [PMID: 24460449 DOI: 10.1021/nn406478f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this study, we report on the synthesis of CdSe/CdS core-shell ultrasmall quantum dots (CS-USQDs) using an aqueous-based wet chemistry protocol. The proposed chemical route uses increasing concentration of 1-thioglycerol to grow the CdS shell on top of the as-precipitated CdSe core in a controllable way. We found that lower concentration of 1-thioglycerol (3 mmol) added into the reaction medium limits the growth of the CdSe core, and higher and increasing concentration (5-11 mmol) of 1-thioglycerol promotes the growth of CdS shell on top of the CdSe core in a very controllable way, with an increase from 0.50 to 1.25 nm in shell thickness. The growth of CS-USQDs of CdSe/CdS was confirmed by using different experimental techniques, such as optical absorption (OA) spectroscopy, fluorescence spectroscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and Raman spectroscopy. Data collected from OA were used to obtain the average values of the CdSe core diameter, whereas Raman data were used to assess the average values of the CdSe core diameter and CdS shell thicknesses.
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Affiliation(s)
- Anielle Christine A Silva
- Laboratório de Novos Materiais Isolantes e Semicondutores (LNMIS), Institute of Physics, Federal University of Uberlândia , CP 593, Uberlândia MG 38400-902, Brazil
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Thakur MS, Ragavan KV. Biosensors in food processing. JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2013; 50:625-41. [PMID: 24425965 PMCID: PMC3671056 DOI: 10.1007/s13197-012-0783-z] [Citation(s) in RCA: 116] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 07/06/2012] [Accepted: 07/17/2012] [Indexed: 11/28/2022]
Abstract
Optical based sensing systems that measure luminescence, fluorescence, reflectance and absorbance, etc., are some of the areas of applications of optical immunosensors. Immunological methods rely on specific binding of an antibody (monoclonal, polyclonal or engineered) to an antigen. Detection of specific microorganisms and microbial toxins requires immobilization of specific antibodies onto a given transducer that can produce signal upon attachment of typical microbe/microbial toxins. Inherent features of immunosensors such as specificity, sensitivity, speed, ease and on-site analysis can be made use for various applications. Safety of food and environment has been a major concern of food technologists and health scientists in recent years. There exists a strong need for rapid and sensitive detection of different components of foods and beverages along with the food borne and water borne pathogens, toxins and pesticide residues with high specificity. Biosensors present attractive, efficient alternative techniques by providing quick and reliable performances. There is a very good potential for application of biosensors for monitoring food quality and safety in food and bioprocessing industries in India.
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Affiliation(s)
- M. S. Thakur
- Fermentation Technology and Bioengineering Department, CSIR - Central Food Technological Research Institute, Mysore, 570020 India
| | - K. V. Ragavan
- Fermentation Technology and Bioengineering Department, CSIR - Central Food Technological Research Institute, Mysore, 570020 India
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Zhang Y, Yang D, Weng L, Wang L. Early lung cancer diagnosis by biosensors. Int J Mol Sci 2013; 14:15479-509. [PMID: 23892596 PMCID: PMC3759869 DOI: 10.3390/ijms140815479] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Revised: 06/29/2013] [Accepted: 07/04/2013] [Indexed: 12/20/2022] Open
Abstract
Lung cancer causes an extreme threat to human health, and the mortality rate due to lung cancer has not decreased during the last decade. Prognosis or early diagnosis could help reduce the mortality rate. If microRNA and tumor-associated antigens (TAAs), as well as the corresponding autoantibodies, can be detected prior to clinical diagnosis, such high sensitivity of biosensors makes the early diagnosis and prognosis of cancer realizable. This review provides an overview of tumor-associated biomarker identifying methods and the biosensor technology available today. Laboratorial researches utilizing biosensors for early lung cancer diagnosis will be highlighted.
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Affiliation(s)
- Yuqian Zhang
- Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 210023, China; E-Mails: (Y.Z.); (D.Y.)
| | - Dongliang Yang
- Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 210023, China; E-Mails: (Y.Z.); (D.Y.)
| | - Lixing Weng
- College of Geography and Biological Information, Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| | - Lianhui Wang
- Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 210023, China; E-Mails: (Y.Z.); (D.Y.)
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Avian Antibodies for Staphylococcal Enterotoxin B as an Efficient Tool for FRET-Based Fluoroimmunosensor. BIONANOSCIENCE 2013. [DOI: 10.1007/s12668-013-0101-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Vinayaka AC, Thakur MS. Facile synthesis and photophysical characterization of luminescent CdTe quantum dots for Forster resonance energy transfer based immunosensing of staphylococcal enterotoxin B. LUMINESCENCE 2012. [DOI: 10.1002/bio.2440] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Aaydha C. Vinayaka
- Fermentation Technology & Bioengineering Department; Central Food Technological Research Institute; Mysore 570020 India
| | - Munna S. Thakur
- Fermentation Technology & Bioengineering Department; Central Food Technological Research Institute; Mysore 570020 India
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Wang YQ, Liu Y, He XW, Li WY, Zhang YK. Highly sensitive synchronous fluorescence determination of mercury (II) based on the denatured ovalbumin coated CdTe QDs. Talanta 2012; 99:69-74. [DOI: 10.1016/j.talanta.2012.04.064] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2012] [Revised: 04/19/2012] [Accepted: 04/30/2012] [Indexed: 11/15/2022]
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Vinayaka AC, Thakur MS. An immunoreactor-based competitive fluoroimmunoassay for monitoring staphylococcal enterotoxin B using bioconjugated quantum dots. Analyst 2012; 137:4343-8. [PMID: 22858836 DOI: 10.1039/c2an35760g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Extensive research on avian systems has proved hens as an alternate source for polyclonal antibody generation necessary for immunosensing applications. Herein, we present the immobilization of avian antibody raised against staphylococcal enterotoxin B (SEB) and its applicability for a competitive fluoroimmunoassay technique. White leghorn hens immunized with SEB generated high affinity antibodies with a highest yield of 3.2 mg ml(-1) having affinity constant of 0.976 × 10(10) M l(-1). A competitive fluoroimmunoassay format was developed comprising CdTe(557) as a fluorescence detector for monitoring SEB, a bacterial super-antigen. CdTe(557) was bioconjugated to SEB according to the carbodiimide protocol and confirmed by absorption spectral analysis. An immunoreactor column was designed by immobilizing anti-SEB antibodies and was successfully employed as an efficient bio-recognition tool. An immuno-affinity reaction involving competitive binding between free SEB and CdTe(557)-bioconjugated SEB for immobilized antibody was relied upon to attain assay specificity and sensitivity. It was possible to quantify SEB from 1000 to 10 ng based on the integrated fluorescence of the SEB-CdTe(557) bioconjugate eluted from the immunoreactor column with a limit of detection of 8.15 ng and a regression coefficient R(2) = 0.9925. Thus, integration of QDs with immuno-affinity reactions revealed the versatility of nanoparticles as a potential fluorescence label for bioanalytical applications.
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Affiliation(s)
- Aaydha C Vinayaka
- Fermentation Technology & Bioengineering Department, CSIR-Central Food Technological Research Institute, New Delhi, India
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Quantum dots as nano plug-in's for efficient NADH resonance energy routing. Biosens Bioelectron 2012; 38:411-5. [PMID: 22651966 DOI: 10.1016/j.bios.2012.05.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Revised: 04/17/2012] [Accepted: 05/07/2012] [Indexed: 11/20/2022]
Abstract
The routing of fluorescent signals from NADH to quantum dots (QDs) has been a subject of extensive research for FRET based applications. In the present study, the spectral cross talk of NAD(+)/NADH with QDs was used to monitor the reaction of NAD(+)-dependent dehydrogenase enzyme. CdTe QD may undergo dipolar interaction with NADH as a result of broad spectral absorption due to multiple excitonic states resulting from quantum confinement effects. Thus, non-radiative energy transfer can take place from NADH to CdTe QD enhancing QDs fluorescence. Energy routing assay of NADH-QD was applied for detection of formaldehyde as a model analyte in the range 1000-0.01 ng/mL by the proposed technique. We observed proportionate quenching of CdTe QD fluorescence by NAD(+) and enhancement in the presence of NADH formed by various concentrations of enzyme (0.028-0.4 U). Hence, it was possible to detect formaldehyde in the range 1000-0.01 ng/mL with a limit of detection (LOD) at 0.01 ng/mL and regression coefficient R(2)=0.9982. Therefore, a unique optical sensor was developed for the detection of the formaldehyde in sensitive level based on the above mechanism. This method can be used to follow the activity of NAD(+)-dependent enzymes and detection of dehydrogenases in general.
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Liu JM, Lin LP, Wang XX, Lin SQ, Cai WL, Zhang LH, Zheng ZY. Highly selective and sensitive detection of Cu2+ with lysine enhancing bovine serum albumin modified-carbon dots fluorescent probe. Analyst 2012; 137:2637-42. [DOI: 10.1039/c2an35130g] [Citation(s) in RCA: 179] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Song Y, Luo D, Ye S, Huang M, Zhong D, Huang Z, Hou H, Wang L. Spectroscopic studies on the interaction between EcoRI and CdS QDs and conformation of EcoRI in EcoRI-CdS QDs bioconjugates. Phys Chem Chem Phys 2012; 14:16258-66. [DOI: 10.1039/c2cp42562a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Overview of stabilizing ligands for biocompatible quantum dot nanocrystals. SENSORS 2011; 11:11036-55. [PMID: 22247651 PMCID: PMC3251968 DOI: 10.3390/s111211036] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2011] [Revised: 11/21/2011] [Accepted: 11/22/2011] [Indexed: 11/17/2022]
Abstract
Luminescent colloidal quantum dots (QDs) possess numerous advantages as fluorophores in biological applications. However, a principal challenge is how to retain the desirable optical properties of quantum dots in aqueous media while maintaining biocompatibility. Because QD photophysical properties are directly related to surface states, it is critical to control the surface chemistry that renders QDs biocompatible while maintaining electronic passivation. For more than a decade, investigators have used diverse strategies for altering the QD surface. This review summarizes the most successful approaches for preparing biocompatible QDs using various chemical ligands.
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