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Nucera A, Macchia ML, Baranyai Z, Carniato F, Tei L, Ravera M, Botta M. Comprehensive Investigation of [Fe(EDTA)] --Functionalized Derivatives and their Supramolecular Adducts with Human Serum Albumin. Inorg Chem 2024; 63:12992-13004. [PMID: 38949627 DOI: 10.1021/acs.inorgchem.4c01715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/02/2024]
Abstract
In recent years, the coordination chemistry of high-spin Fe(III) complexes has increasingly attracted interest due to their potential as effective alternatives to Gd(III)-based MRI contrast agents. This paper discusses the results from our study on Fe(III) complexes with two EDTA derivatives, each modified with either one (EDTA-BOM) or two (EDTA-BOM2) benzyloxymethylene (BOM) groups on the acetic arm(s). These pendant hydrophobic groups enable the complexes to form noncovalent adducts with human serum albumin (HSA), leading to an observed increase in relaxivity due to the reduction in molecular tumbling. Our research involved detailed relaxometric measurements and analyses of both 1H and 17O NMR data at varying temperatures and magnetic field strengths, which is conducted with and without the presence of a protein. A significant finding of this study is the effect of electronic relaxation time on the effectiveness of [Fe(EDTA-BOM)(H2O)]- and [Fe(EDTA-BOM2)(H2O)]- as diagnostic MRI probes. By integrating these relaxometric results with comprehensive thermodynamic, kinetic, and electrochemical data, we have thoroughly characterized how structural modifications to the EDTA base ligand influence the properties of the complexes.
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Affiliation(s)
- Alessandro Nucera
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale Teresa Michel 11, Alessandria 15121, Italy
| | - Maria Ludovica Macchia
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale Teresa Michel 11, Alessandria 15121, Italy
| | - Zsolt Baranyai
- Bracco Imaging SpA, CRB Trieste, AREA Science Park, Basovizza, TS 34149, Italy
| | - Fabio Carniato
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale Teresa Michel 11, Alessandria 15121, Italy
- Magnetic Resonance Platform (PRISMA-UPO), Università del Piemonte Orientale, Viale Teresa Michel 11, Alessandria 15121, Italy
| | - Lorenzo Tei
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale Teresa Michel 11, Alessandria 15121, Italy
| | - Mauro Ravera
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale Teresa Michel 11, Alessandria 15121, Italy
| | - Mauro Botta
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale Teresa Michel 11, Alessandria 15121, Italy
- Magnetic Resonance Platform (PRISMA-UPO), Università del Piemonte Orientale, Viale Teresa Michel 11, Alessandria 15121, Italy
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How to avoid protein aggregation to improve cellular uptake of albumin-based conjugates: towards the rational design of cell-penetrable phosphorescent probes. Colloid Polym Sci 2018. [DOI: 10.1007/s00396-018-4412-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Ranasinghe K, Handunnetti S, Perera IC, Perera T. Synthesis and characterization of novel rhenium(I) complexes towards potential biological imaging applications. Chem Cent J 2016; 10:71. [PMID: 27942267 PMCID: PMC5123207 DOI: 10.1186/s13065-016-0218-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Accepted: 11/10/2016] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Re(I) tricarbonyl complexes exhibit immense potential as fluorescence imaging agents. However, only a handful of rhenium complexes have been utilized in biological imaging. The present study describes the synthesis of four novel rhenium complexes, their characterization and preliminary biological studies to assess their potential as biological imaging agents. RESULTS Four facial rhenium tricarbonyl complexes containing a pyridyl triazine core, (L1 = 5,5'(3-(2-pyridyl)-1,2,4-triazine-5,6-diyl)-bis-2-furansulfonic acid disodium salt and L2 = (3-(2- pyridyl)-5,6-diphenyl-1,2,4-triazine-4',4''-disulfonic acid sodium salt) have been synthesized by utililzing two different Re metal precursors, Re(CO)5Br and [Re(CO)3(H2O)3]OTf in an organic solvent mixture and water, respectively. The rhenium complexes [Re(CO)3(H2O)L1]+ (1), Re(CO)3L1Br (2), [Re(CO)3(H2O)L2]+ (3), and Re(CO)3L2Br (4), were obtained in 70-85% yield and characterized by 1H NMR, IR, UV, and luminescence spectroscopy. In both H2O and acetonitrile, complexes display a weak absorption band in the visible region which can be assigned to a metal to ligand charge transfer excitation and fluorescent emission lying in the 650-710 nm range. Cytotoxicity assays of complexes 1, 3, and 4 were carried out for rat peritoneal cells. Both plant cells (Allium cepa bulb cells) and rat peritoneal cells were stained using the maximum non-toxic concentration levels of the compounds, 20.00 mg ml-1 for 1 and 3 and 5.00 mg ml-1 for 4 to observe under the epifluorescence microscope. In both cell lines, compound concentrated specifically in the nuclei region. Hence, nuclei showed red fluorescence upon excitation at 550 nm. CONCLUSIONS Four novel rhenium complexes have been synthesized and characterized. Remarkable enhancement of fluorescence upon binding with cells and visible range excitability demonstrates the possibility of using the new complexes in biological applications.Graphical abstractMicrograph of rat peritoneal cells incubated with novel rhenium complex under epifluorescence microscope.
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Affiliation(s)
- Kokila Ranasinghe
- Department of Chemistry, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
| | - Shiroma Handunnetti
- Institute of Biochemistry, Molecular Biology and Biotechnology, University of Colombo, Colombo, Sri Lanka
| | - Inoka C. Perera
- Department of Zoology and Environmental Sciences, University of Colombo, Colombo, Sri Lanka
| | - Theshini Perera
- Department of Chemistry, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
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Tang TSM, Liu HW, Lo KKW. Structural Manipulation of Ruthenium(II) Polypyridine Nitrone Complexes to Generate Phosphorogenic Bioorthogonal Reagents for Selective Cellular Labeling. Chemistry 2016; 22:9649-59. [DOI: 10.1002/chem.201601332] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Indexed: 12/12/2022]
Affiliation(s)
- Tommy Siu-Ming Tang
- Department of Biology and Chemistry; City University of Hong Kong; Tat Chee Avenue, Kowloon Hong Kong P.R. China
| | - Hua-Wei Liu
- Department of Biology and Chemistry; City University of Hong Kong; Tat Chee Avenue, Kowloon Hong Kong P.R. China
| | - Kenneth Kam-Wing Lo
- Department of Biology and Chemistry; City University of Hong Kong; Tat Chee Avenue, Kowloon Hong Kong P.R. China
- State Key Laboratory of Millimeter Waves; City University of Hong Kong; Tat Chee Avenue, Kowloon Hong Kong P.R. China
- Center for Functional Photonics; City University of Hong Kong; Tat Chee Avenue, Kowloon Hong Kong P.R. China
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Hasheminasab A, Dawadi MB, Mehr HS, Herrick RS, Ziegler CJ. Re(CO)3 Metallopolymers with Complete Metal Monomer Incorporation: Synthetic, Spectroscopic, Electrochemical, and Computational Studies. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00343] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Abed Hasheminasab
- Department
of Chemistry, The University of Akron, Akron, Ohio 44325-3601, United States
| | - Mahesh B. Dawadi
- Department
of Chemistry, The University of Akron, Akron, Ohio 44325-3601, United States
| | - Hamideh Shokouhi Mehr
- Department
of Chemistry, The University of Akron, Akron, Ohio 44325-3601, United States
| | - Richard S. Herrick
- Department
of Chemistry, College of the Holy Cross, Box C, Worcester, Massachusetts 01610- 2395, United States
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Belyaev AA, Krupenya DV, Grachova EV, Gurzhiy VV, Melnikov AS, Serdobintsev PY, Sinitsyna ES, Vlakh EG, Tennikova TB, Tunik SP. Supramolecular AuI–CuI Complexes as New Luminescent Labels for Covalent Bioconjugation. Bioconjug Chem 2015; 27:143-50. [DOI: 10.1021/acs.bioconjchem.5b00563] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Andrei A. Belyaev
- St. Petersburg State University, Institute of
Chemistry, Universitesky
pr. 26, 198504 St.
Petersburg, Russia
| | - Dmitrii V. Krupenya
- St. Petersburg State University, Institute of
Chemistry, Universitesky
pr. 26, 198504 St.
Petersburg, Russia
| | - Elena V. Grachova
- St. Petersburg State University, Institute of
Chemistry, Universitesky
pr. 26, 198504 St.
Petersburg, Russia
| | - Vladislav V. Gurzhiy
- St. Petersburg State University, Institute of
Earth Sciences, 199034 St. Petersburg, Russia
| | - Alexei S. Melnikov
- St. Petersburg State University, Department
of Physics, 198504 St. Petersburg, Russia
- Institute
of Nanobiotechnologies, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia
| | - Pavel Yu. Serdobintsev
- St. Petersburg State University, Department
of Physics, 198504 St. Petersburg, Russia
- Institute
of Nanobiotechnologies, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia
| | - Ekaterina S. Sinitsyna
- St. Petersburg State University, Institute of
Chemistry, Universitesky
pr. 26, 198504 St.
Petersburg, Russia
| | - Evgenia G. Vlakh
- St. Petersburg State University, Institute of
Chemistry, Universitesky
pr. 26, 198504 St.
Petersburg, Russia
| | - Tatiana B. Tennikova
- St. Petersburg State University, Institute of
Chemistry, Universitesky
pr. 26, 198504 St.
Petersburg, Russia
| | - Sergey P. Tunik
- St. Petersburg State University, Institute of
Chemistry, Universitesky
pr. 26, 198504 St.
Petersburg, Russia
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Tang TSM, Leung KK, Louie MW, Liu HW, Cheng SH, Lo KKW. Phosphorescent biscyclometallated iridium(iii) ethylenediamine complexes functionalised with polar ester or carboxylate groups as bioimaging and visualisation reagents. Dalton Trans 2015; 44:4945-56. [DOI: 10.1039/c4dt02890b] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four new phosphorescent biscyclometallated iridium(iii) ethylenediamine complexes were designed as bioimaging and visualization reagents.
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Affiliation(s)
- Tommy Siu-Ming Tang
- Centre for Functional Photonics and Department of Biology and Chemistry
- City University of Hong Kong
- Kowloon
- People's Republic of China
| | - Kam-Keung Leung
- Centre for Functional Photonics and Department of Biology and Chemistry
- City University of Hong Kong
- Kowloon
- People's Republic of China
| | - Man-Wai Louie
- Centre for Functional Photonics and Department of Biology and Chemistry
- City University of Hong Kong
- Kowloon
- People's Republic of China
| | - Hua-Wei Liu
- Centre for Functional Photonics and Department of Biology and Chemistry
- City University of Hong Kong
- Kowloon
- People's Republic of China
| | - Shuk Han Cheng
- Centre for Functional Photonics and Department of Biomedical Sciences
- City University of Hong Kong
- Kowloon
- People's Republic of China
| | - Kenneth Kam-Wing Lo
- Centre for Functional Photonics and Department of Biology and Chemistry
- City University of Hong Kong
- Kowloon
- People's Republic of China
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Krupenya DV, Snegurov PA, Grachova EV, Gurzhiy VV, Tunik SP, Melnikov AS, Serdobintsev PY, Vlakh EG, Sinitsyna ES, Tennikova TB. New Supramolecular AuI–CuI Complex as Potential Luminescent Label for Proteins. Inorg Chem 2013; 52:12521-8. [DOI: 10.1021/ic401569n] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- D. V. Krupenya
- Department
of Chemistry, St. Petersburg State University, Universitesky pr. 26, 198504 St. Petersburg, Russia
| | - P. A. Snegurov
- Department
of Chemistry, St. Petersburg State University, Universitesky pr. 26, 198504 St. Petersburg, Russia
| | - E. V. Grachova
- Department
of Chemistry, St. Petersburg State University, Universitesky pr. 26, 198504 St. Petersburg, Russia
| | - V. V. Gurzhiy
- Department
of Chemistry, St. Petersburg State University, Universitesky pr. 26, 198504 St. Petersburg, Russia
| | - S. P. Tunik
- Department
of Chemistry, St. Petersburg State University, Universitesky pr. 26, 198504 St. Petersburg, Russia
| | - A. S. Melnikov
- Department of Physics, St. Petersburg State University, Ulianovskaya st. 3, 198504 St. Petersburg, Russia
| | - P. Yu. Serdobintsev
- Department of Physics, St. Petersburg State University, Ulianovskaya st. 3, 198504 St. Petersburg, Russia
| | - E. G. Vlakh
- Department of Chemistry, St. Petersburg State University, Universitesky
pr. 26, 198504 St.
Petersburg, Russia
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. 31, 199004 St. Petersburg, Russia
| | - E. S. Sinitsyna
- Department of Chemistry, St. Petersburg State University, Universitesky
pr. 26, 198504 St.
Petersburg, Russia
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. 31, 199004 St. Petersburg, Russia
| | - T. B. Tennikova
- Department of Chemistry, St. Petersburg State University, Universitesky
pr. 26, 198504 St.
Petersburg, Russia
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoy pr. 31, 199004 St. Petersburg, Russia
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Smith SJ, Du K, Radford RJ, Tezcan FA. Functional, metal-based crosslinkers for α-helix induction in short peptides. Chem Sci 2013; 4:3740-3747. [PMID: 24156013 PMCID: PMC3800689 DOI: 10.1039/c3sc50858g] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Many protein-protein interactions that play a central role in cellular processes involve α-helical domains. Consequently, there has been great interest in developing strategies for stabilizing short peptides in α-helical conformations toward the inhibition and interrogation of protein-protein interactions. Here, we show that tridentate Hybrid Coordination Motifs (HCMs), which consist of a natural (histidine, His) and an unnatural (8-hydroxyquinoline, Quin) metal binding functionality, can bind divalent metal ions with high affinity and thereby induce/stabilize an α-helical configuration in short peptide sequences. The Quin functionality is readily introduced onto peptide platforms both during or after solid-state peptide synthesis, demonstrating the preparative versatility of HCMs. A systematic study involving a series of HCM-bearing peptides has revealed the critical importance of the length of the linkage between the Quin moiety and the peptide backbone as well as the metal coordination geometry in determining the extent of α-helix induction. Through ZnII coordination or modification with ReI(Quin)(CO)3, the HCM-bearing peptides can be rendered luminescent in the visible region, thus showing that HCMs can be exploited to simultaneously introduce structure and functionality into short peptides.
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Affiliation(s)
- Sarah J Smith
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Dr., La Jolla, California 92093-0356
| | - Kang Du
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Dr., La Jolla, California 92093-0356
| | - Robert J Radford
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Dr., La Jolla, California 92093-0356
| | - F Akif Tezcan
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Dr., La Jolla, California 92093-0356
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Bingöl B, Durrell AC, Keller GE, Palmer JH, Grubbs RH, Gray HB. Electron transfer triggered by optical excitation of phenothiazine-tris(meta-phenylene-ethynylene)-(tricarbonyl)(bpy)(py)rhenium(I). J Phys Chem B 2012; 117:4177-82. [PMID: 22533820 DOI: 10.1021/jp3010053] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have investigated excited-state electron transfer in a donor-bridge-acceptor complex containing phenothiazine (PTZ) linked via tris(meta-phenylene-ethynylene) to a tricarbonyl(bipyridine)(pyridine)Re(I) unit. Time-resolved luminescence experiments reveal two excited-state (*Re) decay regimes, a multiexponential component with a mean lifetime of 2.7 ns and a longer monoexponential component of 530 ns in dichloromethane solution. The faster decay is attributed to PTZ → *Re electron transfer in a C-shaped PTZ-bridge-Re conformer (PTZ-Re ≈ 7.5 Å). We assign the longer lifetime, which is virtually identical to that of free *Re, to an extended conformer (PTZ-Re > 20 Å). The observed biexponential *Re decay requires that interconversion of PTZ-bridge-Re conformers be slower than 10(6) s(-1).
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Affiliation(s)
- Bahar Bingöl
- The Arnold and Mabel Beckman Laboratory of Chemical Synthesis, Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA
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Lo KKW, Choi AWT, Law WHT. Applications of luminescent inorganic and organometallic transition metal complexes as biomolecular and cellular probes. Dalton Trans 2012; 41:6021-47. [DOI: 10.1039/c2dt11892k] [Citation(s) in RCA: 321] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Synthesis and electrochemiluminescence studies of tricarbonylrhenium(I) complexes with a cationic 2,2′-bipyridyl ligand. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2011.08.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Rajkumar M, Bhuvaneswari J, Velayudham M, Rajkumar E, Rajagopal S. Photoluminescence Electron-Transfer Quenching of Rhenium(I) Complexes with Organic Sulfides. J Fluoresc 2011; 21:1729-37. [DOI: 10.1007/s10895-011-0868-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2010] [Accepted: 02/13/2011] [Indexed: 11/24/2022]
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Lo KKW, Louie MW, Zhang KY. Design of luminescent iridium(III) and rhenium(I) polypyridine complexes as in vitro and in vivo ion, molecular and biological probes. Coord Chem Rev 2010. [DOI: 10.1016/j.ccr.2010.01.014] [Citation(s) in RCA: 292] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Organometallic derivatizing agents in bioanalysis. Anal Bioanal Chem 2010; 397:3483-94. [DOI: 10.1007/s00216-010-3611-1] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2010] [Revised: 02/22/2010] [Accepted: 02/22/2010] [Indexed: 01/27/2023]
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Fernández-Moreira V, Thorp-Greenwood FL, Coogan MP. Application of d6 transition metal complexes in fluorescence cell imaging. Chem Commun (Camb) 2010; 46:186-202. [DOI: 10.1039/b917757d] [Citation(s) in RCA: 638] [Impact Index Per Article: 45.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Lo KKW. Exploitation of Luminescent Organometallic Rhenium(I) and Iridium(III) Complexes in Biological Studies. TOP ORGANOMETAL CHEM 2010. [DOI: 10.1007/3418_2009_3] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Amoroso AJ, Banu A, Coogan MP, Edwards PG, Hossain G, Malik KMA. Functionalisation of terpyridine complexes containing the Re(CO)3+ moiety. Dalton Trans 2010; 39:6993-7003. [DOI: 10.1039/c0dt00174k] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Tormo L, Organero JÁ, Cohen B, Martin C, Santos L, Douhal A. Dynamical and Structural Changes of an Anesthetic Analogue in Chemical and Biological Nanocavities. J Phys Chem B 2008; 112:13641-7. [DOI: 10.1021/jp803083y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Laura Tormo
- Departamento de Química Física, Sección de Químicas, Facultad de Ciencias del Medio Ambiente, Universidad de Castilla-La Mancha, Avda. Carlos III, s/n, 45071 Toledo, Spain, and Departamento de Química Física, Facultad de Ciencias, Avda Camilo José Cela 13071, Ciudad Real, Spain
| | - Juan Ángel Organero
- Departamento de Química Física, Sección de Químicas, Facultad de Ciencias del Medio Ambiente, Universidad de Castilla-La Mancha, Avda. Carlos III, s/n, 45071 Toledo, Spain, and Departamento de Química Física, Facultad de Ciencias, Avda Camilo José Cela 13071, Ciudad Real, Spain
| | - Boiko Cohen
- Departamento de Química Física, Sección de Químicas, Facultad de Ciencias del Medio Ambiente, Universidad de Castilla-La Mancha, Avda. Carlos III, s/n, 45071 Toledo, Spain, and Departamento de Química Física, Facultad de Ciencias, Avda Camilo José Cela 13071, Ciudad Real, Spain
| | - Cristina Martin
- Departamento de Química Física, Sección de Químicas, Facultad de Ciencias del Medio Ambiente, Universidad de Castilla-La Mancha, Avda. Carlos III, s/n, 45071 Toledo, Spain, and Departamento de Química Física, Facultad de Ciencias, Avda Camilo José Cela 13071, Ciudad Real, Spain
| | - Lucia Santos
- Departamento de Química Física, Sección de Químicas, Facultad de Ciencias del Medio Ambiente, Universidad de Castilla-La Mancha, Avda. Carlos III, s/n, 45071 Toledo, Spain, and Departamento de Química Física, Facultad de Ciencias, Avda Camilo José Cela 13071, Ciudad Real, Spain
| | - Abderrazzak Douhal
- Departamento de Química Física, Sección de Químicas, Facultad de Ciencias del Medio Ambiente, Universidad de Castilla-La Mancha, Avda. Carlos III, s/n, 45071 Toledo, Spain, and Departamento de Química Física, Facultad de Ciencias, Avda Camilo José Cela 13071, Ciudad Real, Spain
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Banerjee SR, Foss CA, Castanares M, Mease RC, Byun Y, Fox JJ, Hilton J, Lupold SE, Kozikowski AP, Pomper MG. Synthesis and evaluation of technetium-99m- and rhenium-labeled inhibitors of the prostate-specific membrane antigen (PSMA). J Med Chem 2008; 51:4504-17. [PMID: 18637669 DOI: 10.1021/jm800111u] [Citation(s) in RCA: 187] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The prostate-specific membrane antigen (PSMA) is increasingly recognized as a viable target for imaging and therapy of cancer. We prepared seven (99m)Tc/Re-labeled compounds by attaching known Tc/Re chelating agents to an amino-functionalized PSMA inhibitor (lys-NHCONH-glu) with or without a variable length linker moiety. K i values ranged from 0.17 to 199 nM. Ex vivo biodistribution and in vivo imaging demonstrated the degree of specific binding to engineered PSMA+ PC3 PIP tumors. PC3-PIP cells are derived from PC3 that have been transduced with the gene for PSMA. Despite demonstrating nearly the lowest PSMA inhibitory potency of this series, [(99m)Tc(CO)3( L1)] (+) ( L1 = (2-pyridylmethyl)2N(CH2) 4CH(CO2H)NHCO-(CH2) 6CO-NH-lys-NHCONH-glu) showed the highest, most selective PIP tumor uptake, at 7.9 +/- 4.0% injected dose per gram of tissue at 30 min postinjection. Radioactivity cleared from nontarget tissues to produce a PIP to flu (PSMA-PC3) ratio of 44:1 at 120 min postinjection. PSMA can accommodate the steric requirements of (99m)Tc/Re complexes within PSMA inhibitors, the best results achieved with a linker moiety between the epsilon amine of the urea lysine and the chelator.
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Affiliation(s)
- Sangeeta R Banerjee
- Russell H Morgan Department of Radiology and Radiological Sciences, Johns Hopkins Medical Institutions, Baltimore, Maryland 21231, USA
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Amoroso AJ, Arthur RJ, Coogan MP, Court JB, Fernández-Moreira V, Hayes AJ, Lloyd D, Millet C, Pope SJA. 3-Chloromethylpyridyl bipyridine fac-tricarbonyl rhenium: a thiol-reactive luminophore for fluorescence microscopy accumulates in mitochondria. NEW J CHEM 2008. [DOI: 10.1039/b802215a] [Citation(s) in RCA: 135] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Albertino A, Garino C, Ghiani S, Gobetto R, Nervi C, Salassa L, Rosenberg E, Sharmin A, Viscardi G, Buscaino R, Croce G, Milanesio M. Photophysical properties and computational investigations of tricarbonylrhenium(I)[2-(4-methylpyridin-2-yl)benzo[d]-X-azole]L and tricarbonylrhenium(I)[2-(benzo[d]-X-azol-2-yl)-4-methylquinoline]L derivatives (X=N–CH3, O, or S; L=Cl−, pyridine). J Organomet Chem 2007. [DOI: 10.1016/j.jorganchem.2006.11.004] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Avedano S, Tei L, Lombardi A, Giovenzana GB, Aime S, Longo D, Botta M. Maximizing the relaxivity of HSA-bound gadolinium complexes by simultaneous optimization of rotation and water exchange. Chem Commun (Camb) 2007:4726-8. [DOI: 10.1039/b714438e] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Organometallic Chemistry of Polypyridine Ligands II. ADVANCES IN HETEROCYCLIC CHEMISTRY 2007. [DOI: 10.1016/s0065-2725(06)94002-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
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29
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Piszczek G. Luminescent metal-ligand complexes as probes of macromolecular interactions and biopolymer dynamics. Arch Biochem Biophys 2006; 453:54-62. [PMID: 16603119 DOI: 10.1016/j.abb.2006.03.007] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2006] [Accepted: 03/05/2006] [Indexed: 11/26/2022]
Abstract
The knowledge of microsecond dynamics is important for an understanding of the mechanism and function of biological systems. Fluorescent techniques are well established in biophysical studies, but their applicability to probe microsecond timescale processes is limited. Luminescent metal-ligand complexes (MLCs) have created interest mainly due to their unique luminescent properties, such as the exceptionally long decay times and large fundamental anisotropy values, allowing examination of microsecond dynamics by fluorescence methods. MLC properties also greatly simplify instrumentation requirements and enable the use of light emitting diode excitation for time-resolved measurements. Recent literature illustrates how MLC labels take full advantage of well developed fluorescence techniques and how those methods can be extended to timescales not easily accessible with nanosecond probes. MLCs are now commercially available as reactive labels which give researchers access to methods that previously required more complex approaches. The present paper gives an overview of the applications of MLC probes to studies of molecular dynamics and interactions of proteins, membranes and nucleic acids.
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Affiliation(s)
- Grzegorz Piszczek
- Laboratory of Biochemistry, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA.
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Palusiak M, Rudolf B, Zakrzewski J, Pfitzner A, Zabel M, Grabowski SJ. Intramolecular carbonyl⋯carbonyl interactions in W, Mo and Fe complexes containing the η1-N-maleimidato ligand: X-ray, DFT and AIM studies. J Organomet Chem 2006. [DOI: 10.1016/j.jorganchem.2006.03.035] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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31
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Banerjee SR, Babich JW, Zubieta J. A new bifunctional amino acid chelator targeting the glucose transporter. Inorganica Chim Acta 2006. [DOI: 10.1016/j.ica.2005.11.022] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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32
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Lo KKW, Tsang KHK, Sze KS. Utilization of the Highly Environment-Sensitive Emission Properties of Rhenium(I) Amidodipyridoquinoxaline Biotin Complexes in the Development of Biological Probes. Inorg Chem 2006; 45:1714-22. [PMID: 16471984 DOI: 10.1021/ic051266f] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report the synthesis and characterization of luminescent rhenium(I) amidodipyridoquinoxaline biotin complexes [Re(CO)3(dpqa)(L)](PF6) (dpqa = 2-(n-butylamido)dipyrido[3,2-f:2',3'-h]quinoxaline; L = 4-(biotinamidomethyl)pyridine (py-4-CH2-NH-biotin) (1), 3-(N-((2-biotinamido)ethyl)amido)pyridine (py-3-CO-NH-en-NH-biotin) (2), 4-(N-((6-biotinamido)hexanoyl)aminomethyl)pyridine (py-4-CH2-NH-cap-NH-biotin) (3)), and their biotin-free counterpart [Re(CO)3(dpqa)(py)](PF6) (py = pyridine (4)). Upon irradiation, these complexes exhibited intense triplet metal-to-ligand charge-transfer (3MLCT) (dpi(Re) --> pi(dpqa)) emission in fluid solutions at 298 K and in alcohol glass at 77 K. However, the emission became much weaker in aqueous buffer, probably due to the interactions of water molecules with the amide substituent of the dpqa ligand. These properties render the complexes good candidates as luminescent probes for hydrophobic media, such as the substrate-binding sites of proteins. The avidin-binding properties of the new biotin complexes have been studied by 4'-hydroxyazobenzene-2-carboxylic acid (HABA) assays, emission titrations, and competitive association and dissociation assays. Most importantly, the complexes showed a profound increase in emission intensities upon binding to avidin. Additionally, we found that the fluorescence of anthracene was quenched by these rhenium(I) complexes, and the 3MLCT emission of the complexes was also quenched by anthracene. On the basis of these findings, new homogeneous assays for biotin using these complexes, avidin, and anthracene-labeled avidin have been designed.
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Affiliation(s)
- Kenneth Kam-Wing Lo
- Department of Biology and Chemistry, City University of Hong Kong, PR China.
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Lo KKW. Luminescent Transition Metal Complexes as Biological Labels and Probes. PHOTOFUNCTIONAL TRANSITION METAL COMPLEXES 2006. [DOI: 10.1007/430_2006_040] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Zhang Z, Greenfield MT, Spiller M, McMurry TJ, Lauffer RB, Caravan P. Multilocus Binding Increases the Relaxivity of Protein-Bound MRI Contrast Agents. Angew Chem Int Ed Engl 2005. [DOI: 10.1002/ange.200502245] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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35
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Zhang Z, Greenfield MT, Spiller M, McMurry TJ, Lauffer RB, Caravan P. Multilocus Binding Increases the Relaxivity of Protein-Bound MRI Contrast Agents. Angew Chem Int Ed Engl 2005; 44:6766-9. [PMID: 16173108 DOI: 10.1002/anie.200502245] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Zhaoda Zhang
- EPIX Pharmaceuticals, Inc. 67 Rogers Street, Cambridge, MA 02142, USA
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36
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Garino C, Ghiani S, Gobetto R, Nervi C, Salassa L, Ancarani V, Neyroz P, Franklin L, Alexander Ross JB, Seibert E. [Os(bpy)2(CO)(enIA)][OTf]2: A Novel Sulfhydryl−Specific Metal−Ligand Complex. Inorg Chem 2005; 44:3875-9. [PMID: 15907113 DOI: 10.1021/ic048452q] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis and physical-chemical characterization of the metal-ligand complex [Os(bpy)2(CO)(enIA)][OTf]2 (where enIA = ethylenediamine iodoacetamide) with a sulfhydryl-specific functional group is described. The UV and visible absorption and luminescence emission, including lifetime and steady-state anisotropy, are reported for the free probe and the probe covalently linked to two test proteins. The spectroscopic properties of the probe are unaffected by chemical modification and subsequent covalent linkage to the proteins. The luminescence lifetime in aqueous buffer is approximately 200 ns and the limiting anisotropy is greater than 0.125, suggesting a potentially useful probe for biophysical investigations.
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Affiliation(s)
- Claudio Garino
- Dipartimento di Chimica IFM, Università di Torino, Via P. Giuria 7, 10125 Torino, Italy
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Tleugabulova D, Sui J, Ayers PW, Brennan JD. Evidence for Rigid Binding of Rhodamine 6G to Silica Surfaces in Aqueous Solution Based on Fluorescence Anisotropy Decay Analysis. J Phys Chem B 2005; 109:7850-8. [PMID: 16851914 DOI: 10.1021/jp045569r] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Strong ionic binding of the cationic probe rhodamine 6G (R6G) to the anionic surface of silica particles in water provides a convenient labeling procedure to study both particle growth kinetics and surface modification by time-resolved fluorescence anisotropy (TRFA). The decays for R6G dispersed in diluted Ludox silica sols usually fit to a sum of picosecond and nanosecond decay components, along with a significant residual anisotropy component. The origin of the nanosecond decay component (phi2) is not fully understood, and has been ascribed to wobbling of the probe on the silica surface, the presence of a subpopulation of small nanoparticles in the Ludox sol, or rapid exchange between free and bound R6G. To elucidate the physical meaning of phi2, measurements were performed in various silica-based colloidal systems using different concentrations of silica. We found that the fraction of phi2 was generally higher in Ludox than in aqueous sodium silicate and decreased with increasing silica concentration; phi2 vanished upon gelation of sodium silicate at pH 7 leading to a total loss of R6G depolarization (r(t) = const). These results rule out the presence of local R6G wobbling when bound ionically to colloidal silica and support the rigid sphere model to describe the TRFA decays for R6G-Ludox. This conclusion is entirely supported by steady-state anisotropy data and structural considerations for the R6G molecule and the silica surface.
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Affiliation(s)
- Dina Tleugabulova
- Department of Chemistry, McMaster University, Hamilton, ON, L8S 4M1, Canada
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38
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Wei L, Babich J, Eckelman WC, Zubieta J. Rhenium Tricarbonyl Core Complexes of Thymidine and Uridine Derivatives. Inorg Chem 2005; 44:2198-209. [PMID: 15792454 DOI: 10.1021/ic048301n] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Thymidine and uridine were modified at the C2' and C5' ribose positions to form amine analogues of the nucleosides (1 and 4). Direct amination with NaBH(OAc)3 in DCE with the appropriate aldehydes yielded 1-{5-[(bis(pyridin-2-ylmethyl)amino)methyl]-4-hydroxytetrahydrofuran-2-yl}-5-methyl-1H-pyrimidine-2,4-dione (L1), 1-{5-[(bis(quinolin-2-ylmethyl)amino)methyl]-4-hydroxytetrahydrofuran-2-yl}-5-methyl-1H-pyrimidine-2,4-dione (L2), and 1-[3-(bis(pyridin-2-ylmethyl)amino)-4-hydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl]-1H-pyrimidine-2,4-dione (L5), while standard coupling procedures of 1 and 4 with 5-(bis(pyridin-2-ylmethyl)amino)pentanoic acid (2) and 5-(bis(quinolin-2-ylmethyl)amino)pentanoic acid (3) in the presence of HOBT-EDCI in DMF provided a second novel series of bifunctional chelators: 5-(bis(pyridin-2-ylmethyl)amino)pentanoic acid [(3-hydroxy-5-(5-methyl-4-oxo-3,4-dihydro-2H-pyrimidin-1-yl)tetrahydrofuran-2-yl)methyl] amide (L3), 5-(bis(quinolin-2-ylmethyl)amino)pentanoic acid [(3-hydroxy-5-(5-methyl-4-oxo-3,4-dihydro-2H-pyrimidin-1-yl)tetrahydrofuran-2-yl)methyl] amide (L4), 5-(bis(pyridin-2-ylmethyl)amino)pentanoic acid [2-(2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-4-hydroxy-5-(hydroxymethyl)tetrahydrofuran-3-yl] amide (L6), and 5-(bis(quinolin-2-ylmethyl)amino)pentanoic acid [2-(2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-4-hydroxy-5-(hydroxymethyl)tetrahydrofuran-3-yl] amide (L7). The rhenium tricarbonyl complexes of L1-L4, L6, and L7, [Re(CO)3(LX)]Br (X=1-4, 6, 7: compounds 5-10, respectively), have been prepared by reacting the appropriate ligand with [NEt4][Re(CO)3Br3] in methanol. The ligands and their rhenium complexes were obtained in good yields and characterized by common spectroscopic techniques including 1D and 2D NMR, HRMS, IR, cyclic voltammetry, UV, and luminescence spectroscopy and X-ray crystallography. The crystal structure of complex 6.0.5NaPF6 displays a facial geometry of the carbonyl ligands. The nitrogen donors of the tridentate ligand complete the distorted octahedral spheres of the complex. Crystal data: monoclinic, C2, a = 24.618(3) A, b = 11.4787(11) A, c = 15.5902(15) A, beta = 112.422(4) degrees , Z = 4, D(calc) = 1.562 g/cm3.
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Affiliation(s)
- Lihui Wei
- Department of Chemistry, Syracuse University, Syracuse, New York 13244, USA
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Banerjee SR, Schaffer P, Babich JW, Valliant JF, Zubieta J. Design and synthesis of site directed maleimide bifunctional chelators for technetium and rhenium. Dalton Trans 2005:3886-97. [PMID: 16311643 DOI: 10.1039/b507096a] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new family of heterobifunctional linkers (L1-L9) containing a terminus consisting of a tridentate donor set for coordination of the {M(CO)(3)}(+) core (M = Tc, Re), and a thiol reactive maleimide group has been prepared conveniently and in high yield under Mitsunobu reaction conditions by the coupling of an appropriate alcohol derivative with maleimide. The rhenium complexes [Re(CO)(3)(Lx)]Br (x= 1-9) were prepared in good yields from the reactions of the ligands and (NEt(4))(2)[Re(CO)(3)Br(3)] in refluxing methanol. The ligands and their Re complexes were characterized by (1)H and (13)C NMR, IR, and ESI-MS. Ligand L4 and [Re(CO)(3)(L5)]Br have been structurally characterized by X-ray crystallography. Photoexcitation of solutions of the complexes [Re(CO)(3)(Lx)]Br (x= 4-6) gives rise to intense and prolonged luminescence at room temperature (fluorescence lifetimes of ca. 16 micros). The ligands and their Re complexes react smoothly at the maleimide linker with sulfhydryl groups of peptides and proteins at room temperature in phosphate-buffered saline (PBS, pH 7.4) to form stable thioether bioconjugates. The photoluminescence properties of the labeled conjugates are similar to those of the parent complexes, but with even longer lifetimes. The ligands can also be labeled at room temperature with (99m)Tc to give chemically robust complexes. The corresponding hydrazinonicotinamide derivative N-[5-(6'-hydrazinopyridine-3'-carbonyl)aminopentyl]maleimide (L10) was also prepared. While coupling of L10 to cysteine ethylester and synthesis of the rhenium derivative [ReCl(3)(HYNIC-maleimide)(2)] were successfully accomplished, attempts to couple [ReCl(3)(HYNIC-maleimide)(2)] to glutathione or BSA yielded intractable mixtures.
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Lo KKW, Lau JSY, Fong VWY, Zhu N. Electrochemical, Photophysical, and Anion-Binding Properties of a Luminescent Rhenium(I) Polypyridine Anthraquinone Complex with a Thiourea Receptor. Organometallics 2004. [DOI: 10.1021/om034224c] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kenneth Kam-Wing Lo
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, People's Republic of China
| | - Jason Shing-Yip Lau
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, People's Republic of China
| | - Vivian Wai-Yin Fong
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, People's Republic of China
| | - Nianyong Zhu
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, People's Republic of China
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41
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Perry JL, Il'ichev YV, Kempf VR, McClendon J, Park G, Manderville RA, Rüker F, Dockal M, Simon JD. Binding of Ochratoxin A Derivatives to Human Serum Albumin. J Phys Chem B 2003. [DOI: 10.1021/jp034284w] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jennifer L. Perry
- Department of Chemistry, Duke University, Durham, North Carolina 27708; Department of Chemistry, Wake Forest University, Winston-Salem, North Carolina 27109; Institute of Applied Microbiology, BOKU University of Natural Resources and Applied Life Sciences, Muthgasse 18, A-1190 Vienna, Austria; and Department of Biochemistry, Duke University Medical Center, Durham, North Carolina 27710
| | - Yuri V. Il'ichev
- Department of Chemistry, Duke University, Durham, North Carolina 27708; Department of Chemistry, Wake Forest University, Winston-Salem, North Carolina 27109; Institute of Applied Microbiology, BOKU University of Natural Resources and Applied Life Sciences, Muthgasse 18, A-1190 Vienna, Austria; and Department of Biochemistry, Duke University Medical Center, Durham, North Carolina 27710
| | - Valerie R. Kempf
- Department of Chemistry, Duke University, Durham, North Carolina 27708; Department of Chemistry, Wake Forest University, Winston-Salem, North Carolina 27109; Institute of Applied Microbiology, BOKU University of Natural Resources and Applied Life Sciences, Muthgasse 18, A-1190 Vienna, Austria; and Department of Biochemistry, Duke University Medical Center, Durham, North Carolina 27710
| | - Jamal McClendon
- Department of Chemistry, Duke University, Durham, North Carolina 27708; Department of Chemistry, Wake Forest University, Winston-Salem, North Carolina 27109; Institute of Applied Microbiology, BOKU University of Natural Resources and Applied Life Sciences, Muthgasse 18, A-1190 Vienna, Austria; and Department of Biochemistry, Duke University Medical Center, Durham, North Carolina 27710
| | - Gyungse Park
- Department of Chemistry, Duke University, Durham, North Carolina 27708; Department of Chemistry, Wake Forest University, Winston-Salem, North Carolina 27109; Institute of Applied Microbiology, BOKU University of Natural Resources and Applied Life Sciences, Muthgasse 18, A-1190 Vienna, Austria; and Department of Biochemistry, Duke University Medical Center, Durham, North Carolina 27710
| | - Richard A. Manderville
- Department of Chemistry, Duke University, Durham, North Carolina 27708; Department of Chemistry, Wake Forest University, Winston-Salem, North Carolina 27109; Institute of Applied Microbiology, BOKU University of Natural Resources and Applied Life Sciences, Muthgasse 18, A-1190 Vienna, Austria; and Department of Biochemistry, Duke University Medical Center, Durham, North Carolina 27710
| | - Florian Rüker
- Department of Chemistry, Duke University, Durham, North Carolina 27708; Department of Chemistry, Wake Forest University, Winston-Salem, North Carolina 27109; Institute of Applied Microbiology, BOKU University of Natural Resources and Applied Life Sciences, Muthgasse 18, A-1190 Vienna, Austria; and Department of Biochemistry, Duke University Medical Center, Durham, North Carolina 27710
| | - Michael Dockal
- Department of Chemistry, Duke University, Durham, North Carolina 27708; Department of Chemistry, Wake Forest University, Winston-Salem, North Carolina 27109; Institute of Applied Microbiology, BOKU University of Natural Resources and Applied Life Sciences, Muthgasse 18, A-1190 Vienna, Austria; and Department of Biochemistry, Duke University Medical Center, Durham, North Carolina 27710
| | - John D. Simon
- Department of Chemistry, Duke University, Durham, North Carolina 27708; Department of Chemistry, Wake Forest University, Winston-Salem, North Carolina 27109; Institute of Applied Microbiology, BOKU University of Natural Resources and Applied Life Sciences, Muthgasse 18, A-1190 Vienna, Austria; and Department of Biochemistry, Duke University Medical Center, Durham, North Carolina 27710
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Lo KKW, Hui WK, Ng DCM, Cheung KK. Synthesis, characterization, photophysical properties, and biological labeling studies of a series of luminescent rhenium(I) polypyridine maleimide complexes. Inorg Chem 2002; 41:40-6. [PMID: 11782142 DOI: 10.1021/ic010602z] [Citation(s) in RCA: 82] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report the synthesis, characterization, and photophysical properties of a series of rhenium(I) polypyridine maleimide complexes [Re(N-N)(CO)(3)(py-3-mal)](CF(3)SO(3)) [N-N = 1,10-phenanthroline, phen (1), 2,9-dimethyl-1,10-phenanthroline, 2,9-Me(2)-phen (2), 3,4,7,8-tetramethyl-1,10-phenanthroline, 3,4,7,8-Me(4)-phen (3), 4,7-diphenyl-1,10-phenanthroline, 4,7-Ph(2)-phen (4), 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline, 2,9-Me(2)-4,7-Ph(2)-phen (5), 2,2'-biquinonine, biq (6); py-3-mal = N-(3-pyridyl)maleimide]. The X-ray crystal structure of complex 2 has been investigated. Upon excitation, the complexes exhibit intense and long-lived photoluminescence in fluid solutions at 298 K. The emission wavelengths range from 514 to 654 nm, and the emission lifetimes fall in the microsecond time scale. The luminescence is assigned to originate from a metal-to-ligand charge-transfer MLCT [dpi(Re) --> pi*(diimine)] triplet excited state. As the maleimide group can react with the sulfhydryl group to form a stable thioether moiety, these complexes have been used as thiol-specific luminescent labels for a thiolated oligonucleotide, glutathione, and bovine serum albumin and human serum albumin. The photoluminescence properties of the labeled biological species have also been investigated.
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Affiliation(s)
- Kenneth Kam-Wing Lo
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, PR China.
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Malecki M, Hsu A, Truong L, Sanchez S. Molecular immunolabeling with recombinant single-chain variable fragment (scFv) antibodies designed with metal-binding domains. Proc Natl Acad Sci U S A 2002; 99:213-8. [PMID: 11756693 PMCID: PMC117541 DOI: 10.1073/pnas.261567298] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2001] [Indexed: 11/18/2022] Open
Abstract
To study the molecular structure and function of gene products in situ, we developed a molecular immunolabeling technology. Starting with cDNA from hybridomas producing monoclonal antibodies against biotin, catalase, and superoxide dismutase, we bioengineered recombinant single-chain variable fragment antibodies (scFv) and their derivatives containing metal-binding domains (scFv:MBD). As tested with surface plasmon resonance and enzyme-linked immunosorbent assay, affinity binding constants of the scFv (5.21 x 10(6) M(-1)) and scFv:MBD (4.17 x 10(6) M(-1)) were close to those of Fab proteolytic fragments (9.78 x 10(6) M(-1)) derived from the parental IgG antibodies. After saturation of MBD with nickel or cobalt, scFv:MBD was imaged with electron spectroscopic imaging at each element's specific energy loss, thus generating the element's map. Immunolabeling with scFv:MBD resulted in a significant improvement of the labeling fidelity over that obtained with Fab or IgG derivatives, as it produced a much heavier specific labeling and label-free background. As determined with radioimmunoassay, labeling effectiveness with scFv:MBD was nearly the same as with scFv, but much higher than with scFv conjugated to colloidal gold, Nanogold, or horseradish peroxidase. This technology opens possibilities for simultaneous imaging of multiple molecules labeled with scFv:MBD at the molecular resolution within the same sample with electron spectroscopic imaging. Moreover, the same scFv:MBD can also be imaged with fluorescence resonance energy transfer and lifetime imaging as well as positron emission tomography and magnetic resonance imaging. Therefore, this technology may serve as an integrative factor in life science endeavors.
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Affiliation(s)
- Marek Malecki
- Molecular Imaging Laboratories, University of California at San Diego, La Jolla, CA 92093, USA.
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44
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Il'ichev YV, Perry JL, Simon JD. Interaction of Ochratoxin A with Human Serum Albumin. Preferential Binding of the Dianion and pH Effects. J Phys Chem B 2001. [DOI: 10.1021/jp012314u] [Citation(s) in RCA: 189] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yuri V. Il'ichev
- Department of Chemistry, Duke University, Durham, North Carolina 27708, and Department of Biochemistry, Duke University Medical Center, Durham, North Carolina 27710
| | - Jennifer L. Perry
- Department of Chemistry, Duke University, Durham, North Carolina 27708, and Department of Biochemistry, Duke University Medical Center, Durham, North Carolina 27710
| | - John D. Simon
- Department of Chemistry, Duke University, Durham, North Carolina 27708, and Department of Biochemistry, Duke University Medical Center, Durham, North Carolina 27710
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Lo KKW, Ng DCM, Chung CK. First Examples of Luminescent Cyclometalated Iridium(III) Complexes as Labeling Reagents for Biological Substrates. Organometallics 2001. [DOI: 10.1021/om010652b] [Citation(s) in RCA: 147] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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