1
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Kofod N, Henrichsen MJ, Sørensen TJ. Mapping the distribution of electronic states within the 5D 4 and 7F 6 levels of Tb 3+ complexes with optical spectroscopy. Dalton Trans 2024; 53:4461-4470. [PMID: 38372338 DOI: 10.1039/d3dt03657j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2024]
Abstract
The Tb(III) ion has the most intense luminescence of the trivalent lanthanide(III) ions. In contrast to Eu(III), where the two levels only include a single state, the high number of electronic states in the ground (7F6) and emitting (5D4) levels makes detailed interpretations of the electronic structure-the crystal field-difficult. Here, luminescence emission and excitation spectra of Tb(III) complexes with 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid (DOTA, [Tb(DOTA)(H2O)]-), ethylenediaminetetraacetic acid (EDTA, [Tb(EDTA)(H2O)3]-) and diethylenetriaminepentaacetic acid (DTPA, [Tb(DTPA)(H2O)]2-) as well as the Tb(III) aqua ion ([Tb(H2O)9]3+) were recorded at room temperature and in frozen solution. Using these data the electronic structure of the 5D4 multiplets of Tb(III) was mapped by considering the transitions to the singly degenerate 7F0 state. A detailed spectroscopic investigation was performed and it was found that the 5D4 multiplet could accurately be described as a single band for [Tb(H2O)9]3+, [Tb(DOTA)(H2O)]- and [Tb(EDTA)(H2O)3]-. In contrast, for [Tb(DTPA)(H2O)]2- two bands were needed. These results demonstrated the ability of describing the electronic structure of the emitting 5D4 multiplet using emission spectra. This offers an avenue for investigating the relationship between molecular structure and luminescent properties in detailed photophysical studies of Tb(III) ion complexes.
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Affiliation(s)
- Nicolaj Kofod
- Department of Chemistry & Nano-Science Center, University of Copenhagen, Universitetsparken 5, 2100 København Ø, Denmark.
| | - Margrete Juel Henrichsen
- Department of Chemistry & Nano-Science Center, University of Copenhagen, Universitetsparken 5, 2100 København Ø, Denmark.
| | - Thomas Just Sørensen
- Department of Chemistry & Nano-Science Center, University of Copenhagen, Universitetsparken 5, 2100 København Ø, Denmark.
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2
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Datta S, Xu J. Recent Advances in Organic Molecular-to-Supramolecular Self-Assembled Room-Temperature Phosphorescent Materials for Biomedical Applications. ACS APPLIED BIO MATERIALS 2023; 6:4572-4585. [PMID: 37883786 DOI: 10.1021/acsabm.3c00677] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2023]
Abstract
This minireview focuses on recent advancements in organic molecular-to-supramolecular self-assembled room-temperature phosphorescent (RTP) materials and their prospective biomedical applications. RTP materials, having their unique capacity to emit long-lasting phosphorescence at ambient temperature, have piqued researchers' interest in various biological applications, including biosensing, bioimaging, drug delivery, and photodynamic therapy (PDT). These materials have several benefits, including high sensitivity, remarkable photostability, and low cytotoxicity. RTP materials' self-assembly into supramolecular structures improves their performance and broadens their uses. Researchers have built organic RTP systems with long-lasting phosphorescence by leveraging weak noncovalent interactions in aquatic conditions. These materials have demonstrated incredible promise as biosensors that enable sensitive analyte detection and as photosensitizers in PDT that target and sensitize specific cell types. The review also outlines future directions and challenges in developing and utilizing pure organic RTP materials for biological imaging purposes, providing valuable guidelines for their future design and application.
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Affiliation(s)
- Saptarshi Datta
- Department of Chemistry and Biochemistry, University of Missouri─St. Louis (UMSL), St. Louis, Missouri 63121, United States
| | - Jinjia Xu
- Department of Chemistry and Biochemistry, University of Missouri─St. Louis (UMSL), St. Louis, Missouri 63121, United States
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3
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Tsai HY, Robidillo CJT, Matharu GK, O'Connor K, Cheong IT, Ni C, Veinot JGC, Algar WR. Spectrotemporal characterization of photoluminescent silicon nanocrystals and their energy transfer to dyes. NANOSCALE 2023. [PMID: 37449921 DOI: 10.1039/d3nr02461j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
Silicon nanocrystals (SiNCs) are a promising material for applications in bioanalysis and imaging. Compared to other types of semiconductor nanocrystals, the development and characterization of energy transfer (ET) configurations with SiNCs has been far more limited, resulting in an equally limited understanding of this process and its SiNC-specific nuances. Here, we present a systematic and detailed study of ET between SiNCs and dyes. A combination of spectroelectrophoresis and time-gated and time-resolved photoluminescence measurements were used to characterize the photophysical properties of ensembles of SiNCs and gain insight into how these properties varied as a function of nanocrystal size. ET between SiNC donors and a series of non-fluorescent Black Hole Quencher (BHQ) dyes and fluorescent sulfo-Cyanine 5.5 dye acceptors was evaluated in terms of spectral properties, wavelength-resolved efficiencies, trends with spectral overlap integral, and differences between two methods of BHQ association with the SiNCs. The overall results were consistent with a Förster resonance energy transfer (FRET) mechanism where the polydispersity of the SiNCs had a significant impact on the observed ET: the choice of wavelength and timing parameters were important, and ensemble measurements represented an average of heterogeneous ET behaviors. Prospective advantages and disadvantages of SiNCs as ET donors are discussed. This study serves as a foundation for the continued and optimized development of ET configurations with SiNCs.
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Affiliation(s)
- Hsin-Yun Tsai
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada, V6T 1Z1.
| | - Christopher Jay T Robidillo
- Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
- Department of Physical Sciences and Mathematics, University of the Philippines Manila, P. Faura Street, Ermita, Manila 1000, Philippines
| | - Gunwant K Matharu
- Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
| | - Kevin O'Connor
- Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
| | - I Teng Cheong
- Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
| | - Chuyi Ni
- Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
| | - Jonathan G C Veinot
- Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
| | - W Russ Algar
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada, V6T 1Z1.
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4
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Kofod N, Sørensen TJ. Tb 3+ Photophysics: Mapping Excited State Dynamics of [Tb(H 2O) 9] 3+ Using Molecular Photophysics. J Phys Chem Lett 2022; 13:11968-11973. [PMID: 36534789 DOI: 10.1021/acs.jpclett.2c03506] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The study of optical transitions in lanthanide(III) ions has evolved separately from molecular photophysics, but the framework still applies to these forbidden transitions. In this study, a detailed photophysical characterization of the [Tb(H2O)9]3+ aqua ion was performed. The luminescence quantum yield (Φlum), excited state lifetime (τobs), radiative (kr ≡ A) and nonradiative (knr) rate constants, and oscillator strength (f) were determined for Tb(CF3SO3)3 in H2O/D2O mixtures in order to map the radiative and nonradiative transition probabilities. It was shown that the intense luminescence observed from Tb3+ compared to other Ln3+ ions is not due to a higher transition probability of emission but rather due to a lack of quenching, quantified by quenching to O-H oscillators in the aqua ion of kq(OH) = 2090 s-1 for terbium and kq(OH) = 8840 s-1 for europium. In addition, the Horrocks method of determining inner-sphere solvent molecules has been revisited, and it was concluded that the Tb3+ is 9-coordinated in aqueous solution.
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Affiliation(s)
- Nicolaj Kofod
- Department of Chemistry & Nano-Science Center, University of Copenhagen, Universitetsparken 5, DK2100København Ø, Denmark
| | - Thomas Just Sørensen
- Department of Chemistry & Nano-Science Center, University of Copenhagen, Universitetsparken 5, DK2100København Ø, Denmark
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5
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Wang L, Nawrocki P, Nielsen LG, Grenier L, Sørensen TJ. A europium(III)-based nanooptode for bicarbonate sensing - a multicomponent approach to sensor materials. Chem Commun (Camb) 2022; 58:9198-9201. [PMID: 35894692 DOI: 10.1039/d2cc02956a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Lanthanide luminescence contains detailed chemical information and can be used to report on several chemical analytes. This has been exploited through elaborate synthesis of responsive lanthanide complexes. Here, we report on a less elaborate approach and assemble four different nanooptodes. Europium(III) is used to sense the bicarbonate concentration. The signal from the optode was enhanced 100 times using antenna chromophore and the response was modulated by the addition of lipophilic cations.
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Affiliation(s)
- Lu Wang
- Nano-Science Center & Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark.
| | - Patrick Nawrocki
- Nano-Science Center & Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark.
| | - Lea G Nielsen
- Nano-Science Center & Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark.
| | - Laura Grenier
- Nano-Science Center & Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark.
| | - Thomas Just Sørensen
- Nano-Science Center & Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark.
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6
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Wang J, Jin Y, Li M, Liu S, Lo KKW, Zhao Q. Time-Resolved Luminescent Sensing and Imaging for Enzyme Catalytic Activity Based on Responsive Probes. Chem Asian J 2022; 17:e202200429. [PMID: 35819359 DOI: 10.1002/asia.202200429] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Revised: 07/11/2022] [Indexed: 11/07/2022]
Abstract
Enzymes, as a kind of biomacromolecules, play an important role in many physiological processes and relate directly to various diseases. Developing an efficient detection method for enzyme activity is important to achieve early diagnosis of enzyme-relevant diseases and high throughput screening of potential enzyme-relevant drugs. Time-resolved luminescence assay provide a high accuracy and signal-to-noise ratios detection methods for enzyme activity, which has been widely used in high throughput screening of enzyme-relevant drugs and diagnosis of enzyme-relevant diseases. Inspired by these advantages, various responsive probes based on metal complexes and metal-free organic compounds have been developed for time-resolved bioimaging and biosensing of enzyme activity owing to their long luminescence lifetimes, high quantum yields and photostability. In this review, we comprehensively reviewed metal complex- and metal-free organic compound-based responsive probes applied to detect enzyme activity through time-resolved imaging, including their design strategies and sensing principles. Current challenges and future prospects in this rapidly growing field are also discussed.
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Affiliation(s)
- Jiawei Wang
- Nanjing University of Posts and Telecommunications, Institute of Advanced Materials, 9 Wenyuan Road, 210023, Nanjing, CHINA
| | - Yibiao Jin
- Nanjing University of Posts and Telecommunications, Institute of Advanced Materials, 9 Wenyuan Road, 210023, Nanjing, CHINA
| | - Mingdang Li
- Nanjing University of Posts and Telecommunications, Institute of Advanced Materials, 9 Wenyuan Road, 210023, Nanjing, CHINA
| | - Shujuan Liu
- Nanjing University of Posts and Telecommunications, Institute of Advanced Materials, 9 Wenyuan Road, 210023, Nanjing, CHINA
| | - Kenneth Kam-Wing Lo
- City University of Hong Kong, Department of Chemistry, Tat Chee Avenue, Hong Kong, CHINA
| | - Qiang Zhao
- Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, 210023, Nanjing, CHINA
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7
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Pilch-Wrobel A, Kotulska AM, Lahtinen S, Soukka T, Bednarkiewicz A. Engineering the Compositional Architecture of Core-Shell Upconverting Lanthanide-Doped Nanoparticles for Optimal Luminescent Donor in Resonance Energy Transfer: The Effects of Energy Migration and Storage. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2200464. [PMID: 35355389 DOI: 10.1002/smll.202200464] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Indexed: 05/08/2023]
Abstract
Förster Resonance Energy Transfer (FRET) between single molecule donor (D) and acceptor (A) is well understood from a fundamental perspective and is widely applied in biology, biotechnology, medical diagnostics, and bio-imaging. Lanthanide doped upconverting nanoparticles (UCNPs) have demonstrated their suitability as alternative donor species. Nevertheless, while they solve most disadvantageous features of organic donor molecules, such as photo-bleaching, spectral cross-excitation, and emission bleed-through, the fundamental understanding and practical realizations of bioassays with UCNP donors remain challenging. Among others, the interaction between many donor ions (in donor UCNP) and many acceptors anchored on the NP surface and the upconversion itself within UCNPs, complicate the decay-based analysis of D-A interaction. In this work, the assessment of designed virtual core-shell NP (VNP) models leads to the new designs of UCNPs, such as …@Er, Yb@Er, Yb@YbEr, which are experimentally evaluated as donor NPs and compared to the simulations. Moreover, the luminescence rise and decay kinetics in UCNP donors upon RET is discussed in newly proposed disparity measurements. The presented studies help to understand the role of energy-transfer and energy migration between lanthanide ion dopants and how the architecture of core-shell UCNPs affects their performance as FRET donors to organic acceptor dyes.
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Affiliation(s)
- Aleksandra Pilch-Wrobel
- Division of Biomedical Physicochemistry, Institute of Low Temperature and Structure Research, PAN, ul.Okolna 2, Wrocław, 50-422, Poland
| | - Agata Maria Kotulska
- Division of Biomedical Physicochemistry, Institute of Low Temperature and Structure Research, PAN, ul.Okolna 2, Wrocław, 50-422, Poland
| | - Satu Lahtinen
- Department of Life Technologies/Biotechnology, University of Turku, Kiinamyllynkatu 10, Turku, 20520, Finland
| | - Tero Soukka
- Department of Life Technologies/Biotechnology, University of Turku, Kiinamyllynkatu 10, Turku, 20520, Finland
| | - Artur Bednarkiewicz
- Division of Biomedical Physicochemistry, Institute of Low Temperature and Structure Research, PAN, ul.Okolna 2, Wrocław, 50-422, Poland
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8
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Fu HJ, Su R, Luo L, Chen ZJ, Sørensen TJ, Hildebrandt N, Xu ZL. Rapid and Wash-Free Time-Gated FRET Histamine Assays Using Antibodies and Aptamers. ACS Sens 2022; 7:1113-1121. [PMID: 35312279 DOI: 10.1021/acssensors.2c00085] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Histamine (HA) is an indicator of food freshness and quality. However, high concentrations of HA can cause food poisoning. Simple, rapid, sensitive, and specific quantification can enable efficient screening of HA in food and beverages. However, conventional assays are complicated and time-consuming, as they require multiple incubation, washing, and separation steps. Here, we demonstrate that time-gated Förster resonance energy transfer (TG-FRET) between terbium (Tb) complexes and organic dyes can be implemented in both immunosensors and aptasensors for simple HA quantification using a rapid, single-step, mix-and-measure assay format. Both biosensors could quantify HA at concentrations relevant in food poisoning with limits of detection of 0.19 μg/mL and 0.03 μg/mL, respectively. Excellent specificity was documented against the structurally similar food components tryptamine and l-histidine. Direct applicability of the TG-FRET assays was demonstrated by quantifying HA in spiked fish and wine samples with both excellent concentration recovery and agreement with conventional multistep enzyme-linked immunosorbent assays (ELISAs). Our results show that the simplicity and rapidity of TG-FRET assays do not compromise sensitivity, specificity, and reliability, and both immunosensors and aptasensors have a strong potential for their implementation in advanced food safety screening.
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Affiliation(s)
- Hui-Jun Fu
- nanoFRET.com, Laboratoire COBRA (Chimie Organique, Bioorganique, Réactivité et Analyse - UMR6014 & FR3038), Université de Rouen Normandie, CNRS, INSA, Normandie Université, 76000 Rouen, France
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Laboratory of Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Ruifang Su
- nanoFRET.com, Laboratoire COBRA (Chimie Organique, Bioorganique, Réactivité et Analyse - UMR6014 & FR3038), Université de Rouen Normandie, CNRS, INSA, Normandie Université, 76000 Rouen, France
- Nano-Science Center & Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark
| | - Lin Luo
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Laboratory of Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Zi-Jian Chen
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Laboratory of Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China
| | - Thomas Just Sørensen
- Nano-Science Center & Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark
| | - Niko Hildebrandt
- nanoFRET.com, Laboratoire COBRA (Chimie Organique, Bioorganique, Réactivité et Analyse - UMR6014 & FR3038), Université de Rouen Normandie, CNRS, INSA, Normandie Université, 76000 Rouen, France
- Department of Chemistry, Seoul National University, Seoul 08826, South Korea
- Université Paris-Saclay, 91405 Orsay, France
| | - Zhen-Lin Xu
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Guangdong Laboratory of Lingnan Modern Agriculture, South China Agricultural University, Guangzhou 510642, China
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9
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Qiu X, Xu J, Cardoso Dos Santos M, Hildebrandt N. Multiplexed Biosensing and Bioimaging Using Lanthanide-Based Time-Gated Förster Resonance Energy Transfer. Acc Chem Res 2022; 55:551-564. [PMID: 35084817 DOI: 10.1021/acs.accounts.1c00691] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The necessity to scrutinize more and more biological molecules and interactions both in solution and on the cellular level has led to an increasing demand for sensitive and specific multiplexed diagnostic analysis. Photoluminescence (PL) detection is ideally suited for multiplexed biosensing and bioimaging because it is rapid and sensitive and there is an almost unlimited choice of fluorophores that provide a large versatility of photophysical properties, including PL intensities, spectra, and lifetimes.The most frequently used technique to detect multiple parameters from a single sample is spectral (or color) multiplexing with different fluorophores, such as organic dyes, fluorescent proteins, quantum dots, or lanthanide nanoparticles and complexes. In conventional PL biosensing approaches, each fluorophore requires a distinct detection channel and excitation wavelength. This drawback can be overcome by Förster resonance energy transfer (FRET) from lanthanide donors to other fluorophore acceptors. The lanthanides' multiple and spectrally narrow emission bands over a broad spectral range can overlap with several different acceptors at once, thereby allowing FRET from one donor to multiple acceptors. The lanthanides' extremely long PL lifetimes provide two important features. First, time-gated (TG) detection allows for efficient suppression of background fluorescence from the biological environment or directly excited acceptors. Second, temporal multiplexing, for which the PL lifetimes are adjusted by the interaction with the FRET acceptor, can be used to determine specific biomolecules and/or their conformation via distinct PL decays. The high signal-to-background ratios, reproducible and precise ratiometric and homogeneous (washing-free) sensing formats, and higher-order multiplexing capabilities of lanthanide-based TG-FRET have resulted in significant advances in the analysis of biomolecular recognition. Applications range from fundamental analysis of biomolecular interactions and conformations to high-throughput and point-of-care in vitro diagnostics and DNA sequencing to advanced optical encoding, using both liquid and solid samples and in situ, in vitro, and in vivo detection with high sensitivity and selectivity.In this Account, we discuss recent advances in lanthanide-based TG-FRET for the development and application of advanced immunoassays, nucleic acid sensing, and fluorescence imaging. In addition to the different spectral and temporal multiplexing approaches, we highlight the importance of the careful design and combination of different biological, organic, and inorganic molecules and nanomaterials for an adjustable FRET donor-acceptor distance that determines the ultimate performance of the diagnostic assays and conformational sensors in their physiological environment. We conclude by sharing our vision on how progress in the development of new sensing concepts, material combinations, and instrumentation can further advance TG-FRET multiplexing and accelerate its translation into routine clinical practice and the investigation of challenging biological systems.
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Affiliation(s)
- Xue Qiu
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Jingyue Xu
- nanofret.com, Laboratoire COBRA, Université de Rouen Normandie, Normandie Université, CNRS, INSA Rouen, 76000 Rouen, France
| | - Marcelina Cardoso Dos Santos
- Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, CEA, CNRS, 91198 Gif-sur-Yvette, France
| | - Niko Hildebrandt
- nanofret.com, Laboratoire COBRA, Université de Rouen Normandie, Normandie Université, CNRS, INSA Rouen, 76000 Rouen, France
- Department of Chemistry, Seoul National University, Seoul 08826, South Korea
- Université Paris-Saclay, 91405 Orsay Cedex, France
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10
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Leygue N, Picard C, Faure P, Bourrier E, Lamarque L, Zwier JM, Galaup C. Design of novel tripyridinophane-based Eu(III) complexes as efficient luminescent labels for bioassay applications. Org Biomol Chem 2021; 20:182-195. [PMID: 34878481 DOI: 10.1039/d1ob02092g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
In this work, the development of highly luminescent europium(III) complexes in water solution is reported, including their syntheses, analyses of their photophysical properties and applications in bioassays. Three Eu(III) complexes are derived from new ligands based on a tripyridinophane platform. There are four distinct sections in the structure of these ligands: an 18-membered polyaminocarboxylic macrocycle to bind efficiently lanthanide ions in aqueous solutions, three chromophoric subunits (4-(phenylethynyl)pyridine moieties) to effectively sensitize the emission of the metal, two peripheral moieties to solubilise the complex in aqueous media (sulfonate, sulfobetaine or glucose groups) and a free NH2 group available for grafting or bioconjugation. In our synthetic procedure, a pivotal macrocyclic platform is obtained with a high yield in the crucial macrocyclization step due to a metal template ion effect (74% yield). In Tris aqueous buffer (pH 7.4), the Eu(III) complexes show a maximum excitation wavelength at 320 nm, a suitable overall quantum yield (14%), a relatively long lifetime (0.80 ms) and a one-photon brightness in the range of 10 000 M-1 cm-1. Importantly, these photophysical properties are retained at dilute concentrations, even in the presence of a very large excess of potentially competing species, such as EDTA or Mg2+ ions. Furthermore, we report the bioconjugation of a Eu(III) complex labelled by an N-hydroxysuccinimide ester reactive group with an antibody (anti-glutathione-S-transferase) and the successful application of the corresponding antibody conjugate in the detection of GST-biotin in a fluoroimmunoassay. These new complexes provide a solution for high sensitivity in Homogeneous Time-Resolved Fluorescence (HTRF®) bioassays.
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Affiliation(s)
- Nadine Leygue
- SPCMIB, UMR5068 CNRS-Université Paul Sabatier-Toulouse III, 118 Route de Narbonne, F-31062 Toulouse, France.
| | - Claude Picard
- SPCMIB, UMR5068 CNRS-Université Paul Sabatier-Toulouse III, 118 Route de Narbonne, F-31062 Toulouse, France.
| | - Pamela Faure
- Cisbio Bioassays, BP 84175, 30200 Codolet, France.
| | | | | | | | - Chantal Galaup
- SPCMIB, UMR5068 CNRS-Université Paul Sabatier-Toulouse III, 118 Route de Narbonne, F-31062 Toulouse, France.
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11
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Payne NC, Kalyakina AS, Singh K, Tye MA, Mazitschek R. Bright and stable luminescent probes for target engagement profiling in live cells. Nat Chem Biol 2021; 17:1168-1177. [PMID: 34675420 PMCID: PMC8555866 DOI: 10.1038/s41589-021-00877-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 08/11/2021] [Indexed: 01/18/2023]
Abstract
The pace of progress in biomedical research directly depends on techniques that enable the quantitative interrogation of interactions between proteins and other biopolymers, or with their small-molecule ligands. Time-resolved Förster resonance energy transfer (TR-FRET) assay platforms offer high sensitivity and specificity. However, the paucity of accessible and biocompatible luminescent lanthanide complexes, which are essential reagents for TR-FRET-based approaches, and their poor cellular permeability have limited broader adaptation of TR-FRET beyond homogeneous and extracellular assay applications. Here, we report the development of CoraFluors, a new class of macrotricyclic terbium complexes, which are synthetically readily accessible, stable in biological media and exhibit photophysical and physicochemical properties that are desirable for biological studies. We validate the performance of CoraFluors in cell-free systems, identify cell-permeable analogs and demonstrate their utility in the quantitative domain-selective characterization of Keap1 ligands, as well as in isoform-selective target engagement profiling of HDAC1 inhibitors in live cells.
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Affiliation(s)
- N Connor Payne
- Center for Systems Biology, Massachusetts General Hospital, Boston, MA, USA
- Department of Chemistry & Chemical Biology, Harvard University, Cambridge, MA, USA
| | - Alena S Kalyakina
- Center for Systems Biology, Massachusetts General Hospital, Boston, MA, USA
- Karlsruhe Institute of Technology, Institute of Organic Chemistry, Karlsruhe, Germany
| | - Kritika Singh
- Center for Systems Biology, Massachusetts General Hospital, Boston, MA, USA
- Department of Bioengineering, Northeastern University, Boston, MA, USA
| | - Mark A Tye
- Center for Systems Biology, Massachusetts General Hospital, Boston, MA, USA
- Harvard Graduate School of Arts and Sciences, Cambridge, MA, USA
| | - Ralph Mazitschek
- Center for Systems Biology, Massachusetts General Hospital, Boston, MA, USA.
- Harvard T.H. Chan School of Public Health, Boston, MA, USA.
- Broad Institute of MIT and Harvard, Cambridge, MA, USA.
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12
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A 15-min non-competitive homogeneous assay for microcystin and nodularin based on time-resolved Förster resonance energy transfer (TR-FRET). Anal Bioanal Chem 2021; 413:6159-6170. [PMID: 34080035 PMCID: PMC8440290 DOI: 10.1007/s00216-021-03375-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 04/19/2021] [Accepted: 04/26/2021] [Indexed: 11/25/2022]
Abstract
Simple and rapid methods are required for screening and analysis of water samples to detect cyanobacterial cyclic peptide hepatotoxins: microcystin/nodularin. Previously, we reported a highly sensitive non-competitive heterogeneous assay for microcystin/nodularin utilizing a generic anti-immunocomplex (anti-IC) single-chain fragment of antibody variable domains (scFv) isolated from a synthetic antibody library together with a generic adda ((2S,3S,4E,6E,8S,9S)-3-amino-9-methoxy-2,6,8-trimethyl-10-phenyldeca-4,6-dienoic acid)-specific monoclonal antibody (Mab) recognizing the common adda part of the microcystin/nodularin. Using the same antibody pair, here we report a homogeneous non-competitive assay for microcystin/nodularin based on TR-FRET (time-resolved Förster resonance energy transfer) measurement. The anti-IC scFv labeled with Alexa Fluor 680 and the Mab labeled with europium enabled the FRET process to occur in the presence of microcystin/nodularin. The TR-FRET signal is proportional to the toxin concentration in the sample. The rapid (15 min) homogeneous assay without requiring any washing step detected all the tested nine toxin variants (microcystin-LR, -dmLR, -RR, -dmRR, -YR, -LY, -LF -LW, and nodularin-R). Very good signal to blank ratio (~13) was achieved using microcystin-LR and the sample detection limit (blank+3SD of blank) for microcystin-LR was ~0.3 μg/L (~0.08 μg/L in 80-μL reaction well). The practical application of the TR-FRET assay was demonstrated with water samples spiked with microcystin-LR as well as with environmental water. The average recoveries of microcystin-LR from spiked water ranged from 65 to 123%. Good correlation (r2 = 0.73 to 0.99) with other methods (liquid chromatography-mass spectrometry and previously reported heterogeneous assay) was found when environmental samples were analyzed. The developed wash-free assay has the potential to play as a quick screening tool to detect microcystin/nodularin from water below the World Health Organization’s guideline limit (1 μg/L of microcystin-LR).
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Charpentier C, Cifliku V, Goetz J, Nonat A, Cheignon C, Cardoso Dos Santos M, Francés‐Soriano L, Wong K, Charbonnière LJ, Hildebrandt N. Ultrabright Terbium Nanoparticles for FRET Biosensing and in Situ Imaging of Epidermal Growth Factor Receptors**. Chemistry 2020; 26:14602-14611. [DOI: 10.1002/chem.202002007] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 06/04/2020] [Indexed: 12/16/2022]
Affiliation(s)
- Cyrille Charpentier
- Equipe de synthèse pour l'analyse (SynPA), Institut Pluridisciplinaire Hubert Curien (IPHC), UMR 7178, CNRS Université de Strasbourg 67087 Strasbourg Cedex France
| | - Vjona Cifliku
- Institute for Integrative Biology of the Cell (I2BC) Université Paris-Saclay, CNRS, CEA 91405 Orsay Cedex France
- nanoFRET.com Laboratoire COBRA (Chimie Organique, Bioorganique, Réactivité et Analyse) Université de Rouen Normandie, CNRS, INSA 76821 Mont-Saint-Aignan Cedex France
| | - Joan Goetz
- Equipe de synthèse pour l'analyse (SynPA), Institut Pluridisciplinaire Hubert Curien (IPHC), UMR 7178, CNRS Université de Strasbourg 67087 Strasbourg Cedex France
- Department of Chemistry Hong Kong Baptist University Hong Kong P. R. China
| | - Aline Nonat
- Equipe de synthèse pour l'analyse (SynPA), Institut Pluridisciplinaire Hubert Curien (IPHC), UMR 7178, CNRS Université de Strasbourg 67087 Strasbourg Cedex France
| | - Clémence Cheignon
- Equipe de synthèse pour l'analyse (SynPA), Institut Pluridisciplinaire Hubert Curien (IPHC), UMR 7178, CNRS Université de Strasbourg 67087 Strasbourg Cedex France
| | - Marcelina Cardoso Dos Santos
- Institute for Integrative Biology of the Cell (I2BC) Université Paris-Saclay, CNRS, CEA 91405 Orsay Cedex France
| | - Laura Francés‐Soriano
- nanoFRET.com Laboratoire COBRA (Chimie Organique, Bioorganique, Réactivité et Analyse) Université de Rouen Normandie, CNRS, INSA 76821 Mont-Saint-Aignan Cedex France
| | - Ka‐Leung Wong
- Department of Chemistry Hong Kong Baptist University Hong Kong P. R. China
| | - Loïc J. Charbonnière
- Equipe de synthèse pour l'analyse (SynPA), Institut Pluridisciplinaire Hubert Curien (IPHC), UMR 7178, CNRS Université de Strasbourg 67087 Strasbourg Cedex France
| | - Niko Hildebrandt
- Institute for Integrative Biology of the Cell (I2BC) Université Paris-Saclay, CNRS, CEA 91405 Orsay Cedex France
- nanoFRET.com Laboratoire COBRA (Chimie Organique, Bioorganique, Réactivité et Analyse) Université de Rouen Normandie, CNRS, INSA 76821 Mont-Saint-Aignan Cedex France
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14
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Hallaj T, Amjadi M, Qiu X, Susumu K, Medintz IL, Hildebrandt N. Terbium-to-quantum dot Förster resonance energy transfer for homogeneous and sensitive detection of histone methyltransferase activity. NANOSCALE 2020; 12:13719-13730. [PMID: 32573632 DOI: 10.1039/d0nr03383a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The development of rapid, simple, and versatile biosensors for monitoring the activity of histone modifying enzymes (HMEs) is needed for the improvement of diagnostic assays, screening of HME inhibitors, and a better understanding of HME kinetics in different environments. Nanoparticles can play an important role in this regard by improving or complementing currently available enzyme detection technologies. Here, we present the development and application of a homogeneous methyltransferase (SET7/9) assay based on time-gated Förster resonance energy transfer (TG-FRET) between terbium complexes (Tb) and luminescent semiconductor quantum dots (QDs). Specific binding of a Tb-antibody conjugate to a SET7/9-methylated Lys4 on a histone H3(1-21) peptide substrate attached to the QD surface resulted in efficient FRET and provided the mechanism for monitoring the SET7/9 activity. Two common peptide-QD attachment strategies (biotin-streptavidin and polyhistidine-mediated self-assembly), two different QD colors (625 and 705 nm), and enzyme sensing with post- or pre-assembled QD-peptide conjugates demonstrated the broad applicability of this assay design. Limits of detection in the low picomolar concentration range, high selectivity tested against non-specific antibodies, enzymes, and co-factors, determination of the inhibition constants of the SET7/9 inhibitors SAH and (R)-PFI-2, and analysis of the co-factor (SAM) concentration-dependent enzyme kinetics of SET7/9 which followed the Michaelis-Menten model highlighted the excellent performance of this TG-FRET HME activity assay.
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Affiliation(s)
- Tooba Hallaj
- Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz 5166616471, Iran. and Cellular and Molecular Research Center, Cellular and Molecular Medicine Institute, Urmia University of Medical Sciences, Urmia 5714783734, Iran
| | - Mohammad Amjadi
- Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz 5166616471, Iran.
| | - Xue Qiu
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198 Gif-sur-Yvette, France and School of Medicine and Pharmacy, Ocean University of China. 5, Yushan Road, 266003 Qingdao, Shandong, China
| | - Kimihiro Susumu
- Optical Sciences Division, Code 5600, U.S. Naval Research Laboratory, Washington, D.C. 20375, USA and KeyW Corporation, Hanover, Maryland 21076, USA
| | - Igor L Medintz
- Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, USA
| | - Niko Hildebrandt
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198 Gif-sur-Yvette, France and nanoFRET.com, Laboratoire COBRA (Chimie Organique, Bioorganique, Réactivité et Analyse), Université de Rouen Normandie, CNRS, INSA, 76821 Mont-Saint-Aignan, France.
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15
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Chen C, Corry B, Huang L, Hildebrandt N. FRET-Modulated Multihybrid Nanoparticles for Brightness-Equalized Single-Wavelength Barcoding. J Am Chem Soc 2019; 141:11123-11141. [DOI: 10.1021/jacs.9b03383] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Chi Chen
- NanoBioPhotonics (nanofret.com), Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, Université Paris-Sud, CNRS, CEA, 91405 Orsay Cedex, France
| | - Ben Corry
- Research School of Biology, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Liang Huang
- College of Chemical Engineering, Zhejiang University of Technology, 310014, Hangzhou, People’s Republic of China
| | - Niko Hildebrandt
- NanoBioPhotonics (nanofret.com), Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, Université Paris-Sud, CNRS, CEA, 91405 Orsay Cedex, France
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16
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Guo J, Mingoes C, Qiu X, Hildebrandt N. Simple, Amplified, and Multiplexed Detection of MicroRNAs Using Time-Gated FRET and Hybridization Chain Reaction. Anal Chem 2019; 91:3101-3109. [DOI: 10.1021/acs.analchem.8b05600] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Jiajia Guo
- NanoBioPhotonics (nanofret.com), Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, Université Paris-Sud, CNRS, CEA, 91400 Orsay, France
| | - Carlos Mingoes
- NanoBioPhotonics (nanofret.com), Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, Université Paris-Sud, CNRS, CEA, 91400 Orsay, France
| | - Xue Qiu
- NanoBioPhotonics (nanofret.com), Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, Université Paris-Sud, CNRS, CEA, 91400 Orsay, France
| | - Niko Hildebrandt
- NanoBioPhotonics (nanofret.com), Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, Université Paris-Sud, CNRS, CEA, 91400 Orsay, France
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17
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Junker AKR, Sørensen TJ. Shining light on the excited state energy cascade in kinetically inert Ln(iii) complexes of a coumarin-appended DO3A ligand. Dalton Trans 2019; 48:964-970. [DOI: 10.1039/c8dt04464c] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Lanthanide based molecular probes for bioimaging relies on the antenna effect, here we are unravelling the excited state energy cascade that results in sensitized lanthanide luminescence.
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Affiliation(s)
- Anne Kathrine R. Junker
- Nano-Science Center & Department of Chemistry
- University of Copenhagen
- 2100 København Ø
- Denmark
| | - Thomas Just Sørensen
- Nano-Science Center & Department of Chemistry
- University of Copenhagen
- 2100 København Ø
- Denmark
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18
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Chen C, Ao L, Wu Y, Cifliku V, Cardoso Dos Santos M, Bourrier E, Delbianco M, Parker D, Zwier JM, Huang L, Hildebrandt N. Single-Nanoparticle Cell Barcoding by Tunable FRET from Lanthanides to Quantum Dots. Angew Chem Int Ed Engl 2018; 57:13686-13690. [PMID: 30084526 PMCID: PMC6391968 DOI: 10.1002/anie.201807585] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 08/06/2018] [Indexed: 12/19/2022]
Abstract
Fluorescence barcoding based on nanoparticles provides many advantages for multiparameter imaging. However, creating different concentration-independent codes without mixing various nanoparticles and by using single-wavelength excitation and emission for multiplexed cellular imaging is extremely challenging. Herein, we report the development of quantum dots (QDs) with two different SiO2 shell thicknesses (6 and 12 nm) that are coated with two different lanthanide complexes (Tb and Eu). FRET from the Tb or Eu donors to the QD acceptors resulted in four distinct photoluminescence (PL) decays, which were encoded by simple time-gated (TG) PL intensity detection in three individual temporal detection windows. The well-defined single-nanoparticle codes were used for live cell imaging and a one-measurement distinction of four different cells in a single field of view. This single-color barcoding strategy opens new opportunities for multiplexed labeling and tracking of cells.
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Affiliation(s)
- Chi Chen
- NanoBioPhotonicsInstitute for Integrative Biology of the Cell (I2BC)Université Paris-Saclay, Université Paris-Sud, CNRS, CEA91400OrsayFrance
| | - Lijiao Ao
- Institute of Biomedicine and BiotechnologyShenzhen Institutes of Advanced TechnologyChinese Academy of Sciences518055ShenzhenP. R. China
| | - Yu‐Tang Wu
- NanoBioPhotonicsInstitute for Integrative Biology of the Cell (I2BC)Université Paris-Saclay, Université Paris-Sud, CNRS, CEA91400OrsayFrance
| | - Vjona Cifliku
- NanoBioPhotonicsInstitute for Integrative Biology of the Cell (I2BC)Université Paris-Saclay, Université Paris-Sud, CNRS, CEA91400OrsayFrance
| | - Marcelina Cardoso Dos Santos
- NanoBioPhotonicsInstitute for Integrative Biology of the Cell (I2BC)Université Paris-Saclay, Université Paris-Sud, CNRS, CEA91400OrsayFrance
| | | | - Martina Delbianco
- Department of ChemistryDurham UniversitySouth RoadDH13LEDurhamUK
- Current affiliation: Max Planck Institute of Colloids and InterfacesPotsdamGermany
| | - David Parker
- Department of ChemistryDurham UniversitySouth RoadDH13LEDurhamUK
| | | | - Liang Huang
- College of Chemical EngineeringZhejiang University of Technology310014HangzhouP. R. China
| | - Niko Hildebrandt
- NanoBioPhotonicsInstitute for Integrative Biology of the Cell (I2BC)Université Paris-Saclay, Université Paris-Sud, CNRS, CEA91400OrsayFrance
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19
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Chen C, Ao L, Wu YT, Cifliku V, Cardoso Dos Santos M, Bourrier E, Delbianco M, Parker D, Zwier JM, Huang L, Hildebrandt N. Einzelnanopartikel-Strichkodierung von Zellen mittels durchstimmbarem FRET von Lanthanoiden auf Quantenpunkte. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201807585] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Chi Chen
- NanoBioPhotonics; Institute for Integrative Biology of the Cell (I2BC); Université Paris-Saclay, Université Paris-Sud, CNRS, CEA; 91400 Orsay Frankreich
| | - Lijiao Ao
- Institute of Biomedicine and Biotechnology; Shenzhen Institutes of Advanced Technology; Chinese Academy of Sciences; 518055 Shenzhen P. R. China
| | - Yu-Tang Wu
- NanoBioPhotonics; Institute for Integrative Biology of the Cell (I2BC); Université Paris-Saclay, Université Paris-Sud, CNRS, CEA; 91400 Orsay Frankreich
| | - Vjona Cifliku
- NanoBioPhotonics; Institute for Integrative Biology of the Cell (I2BC); Université Paris-Saclay, Université Paris-Sud, CNRS, CEA; 91400 Orsay Frankreich
| | - Marcelina Cardoso Dos Santos
- NanoBioPhotonics; Institute for Integrative Biology of the Cell (I2BC); Université Paris-Saclay, Université Paris-Sud, CNRS, CEA; 91400 Orsay Frankreich
| | | | - Martina Delbianco
- Department of Chemistry; Durham University; South Road DH13LE Durham Großbritannien
- Derzeitige Adresse: Max-Planck-Institut für Kolloide und Grenzflächen; Potsdam Deutschland
| | - David Parker
- Department of Chemistry; Durham University; South Road DH13LE Durham Großbritannien
| | | | - Liang Huang
- College of Chemical Engineering; Zhejiang University of Technology; 310014 Hangzhou P. R. China
| | - Niko Hildebrandt
- NanoBioPhotonics; Institute for Integrative Biology of the Cell (I2BC); Université Paris-Saclay, Université Paris-Sud, CNRS, CEA; 91400 Orsay Frankreich
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20
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Wu YT, Qiu X, Lindbo S, Susumu K, Medintz IL, Hober S, Hildebrandt N. Quantum Dot-Based FRET Immunoassay for HER2 Using Ultrasmall Affinity Proteins. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1802266. [PMID: 30079524 DOI: 10.1002/smll.201802266] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 07/02/2018] [Indexed: 05/20/2023]
Abstract
Engineered scaffold affinity proteins are used in many biological applications with the aim of replacing natural antibodies. Although their very small sizes are beneficial for multivalent nanoparticle conjugation and efficient Förster resonance energy transfer (FRET), the application of engineered affinity proteins in such nanobiosensing formats has been largely neglected. Here, it is shown that very small (≈6.5 kDa) histidine-tagged albumin-binding domain-derived affinity proteins (ADAPTs) can efficiently self-assemble to zwitterionic ligand-coated quantum dots (QDs). These ADAPT-QD conjugates are significantly smaller than QD-conjugates based on IgG, Fab', or single-domain antibodies. Immediate applicability by the quantification of the human epidermal growth factor receptor 2 (HER2) in serum-containing samples using time-gated Tb-to-QD FRET detection on the clinical benchtop immunoassay analyzer KRYPTOR is demonstrated here. Limits of detection down to 40 × 10-12 m (≈8 ng mL-1 ) are in a relevant clinical concentration range and outperform previously tested assays with antibodies, antibody fragments, and nanobodies.
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Affiliation(s)
- Yu-Tang Wu
- NanoBioPhotonics (nanofret.com), Institute for Integrative Biology of the Cell, Université Paris-Saclay, Université Paris-Sud, CNRS, CEA, Orsay, France
| | - Xue Qiu
- NanoBioPhotonics (nanofret.com), Institute for Integrative Biology of the Cell, Université Paris-Saclay, Université Paris-Sud, CNRS, CEA, Orsay, France
| | - Sarah Lindbo
- Department of Protein Science, KTH - Royal Institute of Technology, Stockholm, Sweden
| | - Kimihiro Susumu
- Optical Sciences Division, Code 5600, U.S. Naval Research Laboratory, Washington, DC, USA
- KeyW Corporation, Hanover, MD, 21076, USA
| | - Igor L Medintz
- Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, DC, USA
| | - Sophia Hober
- Department of Protein Science, KTH - Royal Institute of Technology, Stockholm, Sweden
| | - Niko Hildebrandt
- NanoBioPhotonics (nanofret.com), Institute for Integrative Biology of the Cell, Université Paris-Saclay, Université Paris-Sud, CNRS, CEA, Orsay, France
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21
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Arppe‐Tabbara R, Carro‐Temboury MR, Hempel C, Vosch T, Sørensen TJ. Luminescence from Lanthanide(III) Ions Bound to the Glycocalyx of Chinese Hamster Ovary Cells. Chemistry 2018; 24:11885-11889. [DOI: 10.1002/chem.201802799] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 06/25/2018] [Indexed: 12/26/2022]
Affiliation(s)
- Riikka Arppe‐Tabbara
- Nano-Science Center & Department of ChemistryUniversity of Copenhagen Universitetsparken 5 2100 København Ø Denmark
| | - Miguel R. Carro‐Temboury
- Nano-Science Center & Department of ChemistryUniversity of Copenhagen Universitetsparken 5 2100 København Ø Denmark
| | - Casper Hempel
- Department of Micro- and NanotechnologyTechnical University of Denmark Kgs Lyngby Denmark
| | - Tom Vosch
- Nano-Science Center & Department of ChemistryUniversity of Copenhagen Universitetsparken 5 2100 København Ø Denmark
| | - Thomas Just Sørensen
- Nano-Science Center & Department of ChemistryUniversity of Copenhagen Universitetsparken 5 2100 København Ø Denmark
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22
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Junker AKR, Hill LR, Thompson AL, Faulkner S, Sørensen TJ. Shining light on the antenna chromophore in lanthanide based dyes. Dalton Trans 2018; 47:4794-4803. [PMID: 29560975 DOI: 10.1039/c7dt04788f] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Lanthanide based dyes and assays exploit the antenna effect, where a sensitiser-chromophore is used as a light harvesting antenna and subsequent excited state energy transfer populates the emitting lanthanide centred excited state. A rudimentary understanding of the design criteria for designing efficient dyes and assays based on the antenna effect is in place. By preparing kinetically inert lanthanide complexes based on the DO3A scaffold, we are able to study the excited state energy transfer from a 7-methoxy-coumarin antenna chromophore to europium(iii) and terbium(iii) centred excited states. By contrasting the photophysical properties of complexes of metal centres with and without accessible excited states, we are able to separate the contributions from the heavy atom effect, photoinduced electron transfer quenching, excited state energy transfer and molecular conformations. Furthermore, by studying the photophysical properties of the antenna chromophore, we can directly monitor the solution structure and are able to conclude that excited state energy transfer from the chromophore singlet state to the lanthanide centre does occur.
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Affiliation(s)
- Anne Kathrine R Junker
- Nano-Science Center & Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 København Ø, Denmark.
| | - Leila R Hill
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, UK.
| | - Amber L Thompson
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, UK.
| | - Stephen Faulkner
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, UK.
| | - Thomas Just Sørensen
- Nano-Science Center & Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 København Ø, Denmark.
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23
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Nielsen LG, Junker AKR, Sørensen TJ. Composed in the f-block: solution structure and function of kinetically inert lanthanide(iii) complexes. Dalton Trans 2018; 47:10360-10376. [DOI: 10.1039/c8dt01501e] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
An induction to the wonders of lanthanides, and a call for standardised methods for characterisation of lanthanide complexes in solution.
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Affiliation(s)
- Lea Gundorff Nielsen
- Nano-Science Center & Department of Chemistry
- University of Copenhagen
- 2100 København Ø
- Denmark
| | - Anne Kathrine R. Junker
- Nano-Science Center & Department of Chemistry
- University of Copenhagen
- 2100 København Ø
- Denmark
| | - Thomas Just Sørensen
- Nano-Science Center & Department of Chemistry
- University of Copenhagen
- 2100 København Ø
- Denmark
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