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Alshamrani AF, Prior TJ, Burke BP, Roberts DP, Archibald SJ, Higham LJ, Stasiuk G, Redshaw C. Water-Soluble Rhenium Phosphine Complexes Incorporating the Ph 2C(X) Motif (X = O -, NH -): Structural and Cytotoxicity Studies. Inorg Chem 2020; 59:2367-2378. [PMID: 31984731 DOI: 10.1021/acs.inorgchem.9b03239] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Reaction of [ReOCl3(PPh3)2] or [ReO2I(PPh3)2] with 2,2'-diphenylglycine (dpgH2) in refluxing ethanol afforded the air-stable complex [ReO(dpgH)(dpg)(PPh3)] (1). Treatment of [ReO(OEt)I2(PPh3)2] with 1,2,3-triaza-7-phosphaadamantane (PTA) afforded the complex [ReO(OEt)I2(PTA)2] (2). Reaction of [ReOI2(PTA)3] with dpgH2 led to the isolation of the complex [Re(NCPh2)I2(PTA)3]·0.5EtOH (3·0.5EtOH). A similar reaction but using [ReOX2(PTA)3] (X = Cl, Br) resulted in the analogous halide complexes [Re(NCPh2)Cl2(PTA)3]·2EtOH (4·2EtOH) and [Re(NCPh2)(PTA)3Br2]·1.6EtOH (5·1.6EtOH). Using benzilic acid (2,2'-diphenylglycolic acid, benzH) with 2 afforded the complex [ReO(benz)2(PTA)][PTAH]·EtOH (6·EtOH). The potential for the formation of complexes using radioisotopes with relatively short half-lives suitable for nuclear medicine applications by developing conditions for [Re(NCPh2)(dpg)I(PTA)3] (7)[ReO4]- in a 4 h time scale was investigated. A procedure for the technetium analog of complex [Re(NCPh2)I2(PTA)3] (3) from 99mTc[TcO4]- was then investigated. The molecular structures of 1-7 are reported; complexes 3-7 have been studied using in vitro cell assays (HeLa, HCT116, HT-29, and HEK 293) and were found to have IC50 values in the range of 29-1858 μM.
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Affiliation(s)
- Abdullah F Alshamrani
- Department of Chemistry & Biochemistry , University of Hull , Cottingham Road , Hull HU6 7RX , U.K.,Department of Biomedical Sciences , University of Hull , Cottingham Road , Hull HU6 7RX , U.K
| | - Timothy J Prior
- Department of Chemistry & Biochemistry , University of Hull , Cottingham Road , Hull HU6 7RX , U.K
| | - Benjamin P Burke
- Positron Emission Tomography Research Centre , University of Hull , Cottingham Road , Hull HU6 7RX , U.K
| | - David P Roberts
- Positron Emission Tomography Research Centre , University of Hull , Cottingham Road , Hull HU6 7RX , U.K
| | - Stephen J Archibald
- Department of Biomedical Sciences , University of Hull , Cottingham Road , Hull HU6 7RX , U.K.,Positron Emission Tomography Research Centre , University of Hull , Cottingham Road , Hull HU6 7RX , U.K
| | - Lee J Higham
- School of Natural & Environmental Sciences , Newcastle University , Newcastle upon Tyne NE1 7RU , U.K
| | - Graeme Stasiuk
- Department of Biomedical Sciences , University of Hull , Cottingham Road , Hull HU6 7RX , U.K
| | - Carl Redshaw
- Department of Chemistry & Biochemistry , University of Hull , Cottingham Road , Hull HU6 7RX , U.K
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Stasiuk GJ, Minuzzi F, Sae-Heng M, Rivas C, Juretschke HP, Piemonti L, Allegrini PR, Laurent D, Duckworth AR, Beeby A, Rutter GA, Long NJ. Dual-modal magnetic resonance/fluorescent zinc probes for pancreatic β-cell mass imaging. Chemistry 2015; 21:5023-33. [PMID: 25736590 PMCID: PMC4464533 DOI: 10.1002/chem.201406008] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Indexed: 11/11/2022]
Abstract
Despite the contribution of changes in pancreatic β-cell mass to the development of all forms of diabetes mellitus, few robust approaches currently exist to monitor these changes prospectively in vivo. Although magnetic-resonance imaging (MRI) provides a potentially useful technique, targeting MRI-active probes to the β cell has proved challenging. Zinc ions are highly concentrated in the secretory granule, but they are relatively less abundant in the exocrine pancreas and in other tissues. We have therefore developed functional dual-modal probes based on transition-metal chelates capable of binding zinc. The first of these, Gd⋅1, binds Zn(II) directly by means of an amidoquinoline moiety (AQA), thus causing a large ratiometric Stokes shift in the fluorescence from λem =410 to 500 nm with an increase in relaxivity from r1 =4.2 up to 4.9 mM(-1) s(-1) . The probe is efficiently accumulated into secretory granules in β-cell-derived lines and isolated islets, but more poorly by non-endocrine cells, and leads to a reduction in T1 in human islets. In vivo murine studies of Gd⋅1 have shown accumulation of the probe in the pancreas with increased signal intensity over 140 minutes.
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Affiliation(s)
- Graeme J Stasiuk
- Department of Chemistry, Imperial College LondonSouth Kensington Campus, London SW7 2AZ (UK)
| | - Florencia Minuzzi
- Section of Cell Biology and Functional Genomics, Division of Diabetes, Endocrinology and Metabolism, Department of MedicineImperial College London, Hammersmith Hospital, London W12 0NN (UK)
| | - Myra Sae-Heng
- Department of Chemistry, Imperial College LondonSouth Kensington Campus, London SW7 2AZ (UK)
| | - Charlotte Rivas
- Department of Chemistry, Imperial College LondonSouth Kensington Campus, London SW7 2AZ (UK)
| | - Hans-Paul Juretschke
- Sanofi-Aventis Deutschland GmbH, R&D DSAR/BiomakersBiom & Biol Ass, FF, Industriepark Hoechst, Building H825, 65926 Frankfurt (Germany)
| | - Lorenzo Piemonti
- Diabetes Research Institute, IRCCS San Raffaele Scientific InstituteVia Olgettina 60, 20132 Milano (Italy)
| | | | - Didier Laurent
- Novartis Institute for Biomedical Research, Fabrikstrasse10-2.40.4, 4056, Basel (Switzerland)
| | - Andrew R Duckworth
- Department of Chemistry, Durham University, South RoadDurham, DH1 3LE (UK)
| | - Andrew Beeby
- Department of Chemistry, Durham University, South RoadDurham, DH1 3LE (UK)
| | - Guy A Rutter
- Section of Cell Biology and Functional Genomics, Division of Diabetes, Endocrinology and Metabolism, Department of MedicineImperial College London, Hammersmith Hospital, London W12 0NN (UK)
| | - Nicholas J Long
- Department of Chemistry, Imperial College LondonSouth Kensington Campus, London SW7 2AZ (UK)
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Moula Karimdjy M, Tallec G, Fries PH, Imbert D, Mazzanti M. Confinement of a tris-aqua Gd(iii) complex in silica nanoparticles leads to high stability and high relaxivity and supresses anion binding. Chem Commun (Camb) 2015; 51:6836-8. [DOI: 10.1039/c5cc01352f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Confinement of [Gd(dhqN-SO3)(H2O)3]3− in silica nanoparticles prevents transmetallation or anion binding, yielding high relaxivity over a range of magnetic fields.
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Affiliation(s)
| | | | | | - Daniel Imbert
- Univ. Grenoble Alpes
- INAC-LCIB
- RICC
- F-38000 Grenoble
- France
| | - Marinella Mazzanti
- Institut des Sciences et Ingénierie Chimiques
- Ecole Polytechnique Fédérale de Lausanne (EPFL)
- CH-1015 Lausanne
- Switzerland
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Bernhard Y, Winckler P, Perrier-Cornet JM, Decréau RA. Harnessing medically relevant metals onto water-soluble subphthalocyanines: towards bimodal imaging and theranostics. Dalton Trans 2015; 44:3200-8. [DOI: 10.1039/c4dt03536d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Water-soluble subphthalocyanine (SubPc) - chelating ligands (DOTA, DTPA) conjugates were complexed with six metals relevant to medical imaging/therapies (MRI, PET, SPECT, RIT, NCT). Magneto-optical properties of the ditopic Gd complex and cellular microscopy studies were reported.
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Affiliation(s)
- Yann Bernhard
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB)
- UMR 6302 CNRS-Université de Bourgogne
- Dijon Cedex
- France
| | - Pascale Winckler
- Université de Bourgogne
- AgroSup Dijon
- Dimacell Imaging Ressource Center
- UMR A 02.102 PAM
- F-21000 Dijon
| | | | - Richard A. Decréau
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB)
- UMR 6302 CNRS-Université de Bourgogne
- Dijon Cedex
- France
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