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Sidorenko GV, Miroslavov AE, Tyupina MY. Technetium(I) carbonyl complexes for nuclear medicine: Coordination-chemical aspect. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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2
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Brandt F, Ullrich M, Laube M, Kopka K, Bachmann M, Löser R, Pietzsch J, Pietzsch HJ, van den Hoff J, Wodtke R. "Clickable" Albumin Binders for Modulating the Tumor Uptake of Targeted Radiopharmaceuticals. J Med Chem 2021; 65:710-733. [PMID: 34939412 DOI: 10.1021/acs.jmedchem.1c01791] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The intentional binding of radioligands to albumin gains increasing attention in the context of radiopharmaceutical cancer therapy as it can lead to an enhanced radioactivity uptake into the tumor lesions and, thus, to a potentially improved therapeutic outcome. However, the influence of the radioligand's albumin-binding affinity on the time profile of tumor uptake has been only partly addressed so far. Based on the previously identified Nε-4-(4-iodophenyl)butanoyl-lysine scaffold, we designed "clickable" lysine-derived albumin binders (cLABs) and determined their dissociation constants toward albumin by novel assay methods. Structure-activity relationships were derived, and selected cLABs were applied for the modification of the somatostatin receptor subtype 2 ligand (Tyr3)octreotate. These novel conjugates were radiolabeled with copper-64 and subjected to a detailed in vitro and in vivo radiopharmacological characterization. Overall, the results of this study provide an incentive for further investigations of albumin binders for applications in endoradionuclide therapies.
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Affiliation(s)
- Florian Brandt
- Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany.,Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Mommsenstraße 4, 01069 Dresden, Germany
| | - Martin Ullrich
- Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Markus Laube
- Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Klaus Kopka
- Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany.,Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Mommsenstraße 4, 01069 Dresden, Germany
| | - Michael Bachmann
- Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany.,National Center for Tumor Diseases (NCT) Dresden, University Hospital Carl Gustav Carus, Fetscherstraße 74, 01307 Dresden, Germany
| | - Reik Löser
- Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany.,Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Mommsenstraße 4, 01069 Dresden, Germany
| | - Jens Pietzsch
- Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany.,Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Mommsenstraße 4, 01069 Dresden, Germany
| | - Hans-Jürgen Pietzsch
- Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany.,Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Mommsenstraße 4, 01069 Dresden, Germany
| | - Jörg van den Hoff
- Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany.,Technische Universität Dresden, Department of Nuclear Medicine, University Hospital Carl Gustav Carus, Fetscherstraße 74, 01307 Dresden, Germany
| | - Robert Wodtke
- Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
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3
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Towards Optimized Bioavailability of 99mTc-Labeled Barbiturates for Non-invasive Imaging of Matrix Metalloproteinase Activity. Mol Imaging Biol 2021; 24:434-443. [PMID: 34750717 PMCID: PMC9085681 DOI: 10.1007/s11307-021-01668-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 09/28/2021] [Accepted: 10/07/2021] [Indexed: 11/16/2022]
Abstract
Introduction
Dysregulated activity of matrix metalloproteinases (MMPs) drives a variety of pathophysiological conditions. Non-invasive imaging of MMP activity in vivo promises diagnostic and prognostic value. However, current targeting strategies by small molecules are typically limited with respect to the bioavailability of the labeled MMP binders in vivo. To this end, we here introduce and compare three chemical modifications of a recently developed barbiturate-based radiotracer with respect to bioavailability and potential to image MMP activity in vivo. Methods Barbiturate-based MMP inhibitors with an identical targeting unit but varying hydrophilicity were synthesized, labeled with technetium-99m, and evaluated in vitro and in vivo. Biodistribution and radiotracer elimination were determined in C57/BL6 mice by serial SPECT imaging. MMP activity was imaged in a MMP-positive subcutaneous xenograft model of human K1 papillary thyroid tumors. In vivo data were validated by scintillation counting, autoradiography, and MMP immunohistochemistry. Results We prepared three new 99mTc‐labeled MMP inhibitors, bearing either a glycine ([99mTc]MEA39), lysine ([99mTc]MEA61), or the ligand HYNIC with the ionic co-ligand TPPTS ([99mTc]MEA223) yielding gradually increasing hydrophilicity. [99mTc]MEA39 and [99mTc]MEA61 were rapidly eliminated via hepatobiliary pathways. In contrast, [99mTc]MEA223 showed delayed in vivo clearance and primary renal elimination. In a thyroid tumor xenograft model, only [99mTc]MEA223 exhibited a high tumor-to-blood ratio that could easily be delineated in SPECT images. Conclusion Introduction of HYNIC/TPPTS into the barbiturate lead structure ([99mTc]MEA223) results in delayed renal elimination and allows non-invasive MMP imaging with high signal-to-noise ratios in a papillary thyroid tumor xenograft model. Supplementary Information The online version contains supplementary material available at 10.1007/s11307-021-01668-z.
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Hausner SH, Bauer N, Davis RA, Ganguly T, Tang SYC, Sutcliffe JL. The Effects of an Albumin Binding Moiety on the Targeting and Pharmacokinetics of an Integrin α vβ 6-Selective Peptide Labeled with Aluminum [ 18F]Fluoride. Mol Imaging Biol 2021; 22:1543-1552. [PMID: 32383076 DOI: 10.1007/s11307-020-01500-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
PURPOSE The αvβ6-BP peptide selectively targets the integrin αvβ6, a cell surface receptor recognized as a prognostic indicator for several challenging malignancies. Given that the 4-[18F]fluorobenzoyl (FBA)-labeled peptide is a promising PET imaging agent, radiolabeling via aluminum [18F]fluoride chelation and introduction of an albumin binding moiety (ABM) have the potential to considerably simplify radiochemistry and improve the pharmacokinetics by increasing biological half-life. PROCEDURES The peptides NOTA-αvβ6-BP (1) and NOTA-K(ABM)-αvβ6-BP (2) were synthesized on solid phase, radiolabeled with aluminum [18F]fluoride, and evaluated in vitro (integrin ELISA, albumin binding, cell studies) and in vivo in mouse models bearing paired DX3puroβ6 [αvβ6(+)]/DX3puro [αvβ6(-)], and for [18F]AlF 2, BxPC-3 [αvβ6(+)] cell xenografts (PET imaging, biodistribution). RESULTS The peptides were radiolabeled in 23.0 ± 5.7 % and 22.1 ± 4.4 % decay-corrected radiochemical yield, respectively, for [18F]AlF 1 and [18F]AlF 2. Both demonstrated excellent affinity and selectivity for integrin αvβ6 by ELISA (IC50(αvβ6) = 3-7 nM vs IC50(αvβ3) > 10 μM) and in cell binding studies (51.0 ± 0.7 % and 47.2 ± 0.7 % of total radioactivity bound to DX3puroβ6 cells at 1 h, respectively, vs. ≤ 1.2 % to DX3puro for both compounds). The radiotracer [18F]AlF 1 bound to human serum at 16.3 ± 1.9 %, compared to 67.5 ± 1.0 % for the ABM-containing [18F]AlF 2. In vivo studies confirmed the effect of the ABM on blood circulation (≤ 0.1 % ID/g remaining in blood for [18F]AlF 1 as soon as 1 h p.i. vs. > 2 % ID/g for [18F]AlF 2 at 6 h p.i.) and higher αvβ6(+) tumor uptake (4 h: DX3puroβ6; [18F]AlF 1: 3.0 ± 0.7 % ID/g, [18F]AlF 2: 7.2 ± 0.7 % ID/g; BxPC-3; [18F]AlF 2: 10.2 ± 0.1 % ID/g). CONCLUSION Both compounds were prepared using standard chemistries; affinity and selectivity for integrin αvβ6 in vitro remained unaffected by the albumin binding moiety. In vivo, the albumin binding moiety resulted in prolonged circulation and higher αvβ6-targeted uptake.
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Affiliation(s)
- Sven H Hausner
- Division of Hematology/Oncology, Department of Internal Medicine, University of California Davis, Sacramento, CA, USA
| | - Nadine Bauer
- Division of Hematology/Oncology, Department of Internal Medicine, University of California Davis, Sacramento, CA, USA
| | - Ryan A Davis
- Department of Biomedical Engineering, University of California Davis, Davis, CA, USA
| | - Tanushree Ganguly
- Division of Hematology/Oncology, Department of Internal Medicine, University of California Davis, Sacramento, CA, USA
| | - Sarah Y C Tang
- Division of Hematology/Oncology, Department of Internal Medicine, University of California Davis, Sacramento, CA, USA
| | - Julie L Sutcliffe
- Division of Hematology/Oncology, Department of Internal Medicine, University of California Davis, Sacramento, CA, USA. .,Department of Biomedical Engineering, University of California Davis, Davis, CA, USA. .,Center for Molecular and Genomic Imaging, University of California Davis, Davis, CA, USA.
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5
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Sorbitol as a Polar Pharmacological Modifier to Enhance the Hydrophilicity of 99mTc-Tricarbonyl-Based Radiopharmaceuticals. Molecules 2020; 25:molecules25112680. [PMID: 32527027 PMCID: PMC7321340 DOI: 10.3390/molecules25112680] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 06/01/2020] [Accepted: 06/04/2020] [Indexed: 02/08/2023] Open
Abstract
The organometallic technetium-99m tricarbonyl core, [99mTc][Tc(CO)3(H2O)3]+, is a versatile precursor for the development of radiotracers for single photon emission computed tomography (SPECT). A drawback of the 99mTc-tricarbonyl core is its lipophilicity, which can influence the pharmacokinetic properties of the SPECT imaging probe. Addition of polar pharmacological modifiers to 99mTc-tricarbonyl conjugates holds the promise to counteract this effect and provide tumor-targeting radiopharmaceuticals with improved hydrophilicities, e.g., resulting in a favorable fast renal excretion in vivo. We applied the "Click-to-Chelate" strategy for the assembly of a novel 99mTc-tricarbonyl labeled conjugate made of the tumor-targeting, modified bombesin binding sequence [Nle14]BBN(7-14) and the carbohydrate sorbitol as a polar modifier. The 99mTc-radiopeptide was evaluated in vitro with PC-3 cells and in Fox-1nu mice bearing PC-3 xenografts including a direct comparison with a reference conjugate lacking the sorbitol moiety. The glycated 99mTc-tricarbonyl peptide conjugate exhibited an increased hydrophilicity as well as a retained affinity toward the Gastrin releasing peptide receptor and cell internalization properties. However, there was no significant difference in vivo in terms of pharmacokinetic properties. In particular, the rate and route of excretion was unaltered in comparison to the more lipophilic reference compound. This could be attributed to the intrinsic properties of the peptide and/or its metabolites. We report a novel glycated (sorbitol-containing) alkyne substrate for the "Click-to-Chelate" methodology, which is potentially of general applicability for the development of 99mTc-tricarbonyl based radiotracers displaying an enhanced hydrophilicity.
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6
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Novel 99mTc-2-arylimidazo[2,1-b]benzothiazole derivatives as SPECT imaging agents for amyloid-β plaques. Eur J Med Chem 2019; 175:149-161. [DOI: 10.1016/j.ejmech.2019.04.069] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 04/09/2019] [Accepted: 04/27/2019] [Indexed: 01/11/2023]
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7
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Brandt M, Cardinale J, Giammei C, Guarrochena X, Happl B, Jouini N, Mindt TL. Mini-review: Targeted radiopharmaceuticals incorporating reversible, low molecular weight albumin binders. Nucl Med Biol 2019; 70:46-52. [PMID: 30831342 DOI: 10.1016/j.nucmedbio.2019.01.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 01/18/2019] [Accepted: 01/21/2019] [Indexed: 12/20/2022]
Abstract
The combination of low molecular weight, reversible human serum albumin (HSA) binders with targeted radiopharmaceuticals in dual-targeted radioconjugates holds great promise, in particular for endoradiotherapy. Attachment of HSA-binders to radiopharmaceuticals extends their blood circulation time and results in an enhanced tumour uptake as well as often in an improved pharmacokinetic profile. In this mini-review, an overview of currently pursued approaches of this novel strategy is provided.
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Affiliation(s)
- Marie Brandt
- Ludwig Boltzmann Institute Applied Diagnostics, General Hospital of Vienna, Vienna, Austria; Department of Biomedical Imaging and Image Guided Therapy, Division of Nuclear Medicine, Medical University of Vienna, Vienna, Austria
| | - Jens Cardinale
- Ludwig Boltzmann Institute Applied Diagnostics, General Hospital of Vienna, Vienna, Austria; Department of Biomedical Imaging and Image Guided Therapy, Division of Nuclear Medicine, Medical University of Vienna, Vienna, Austria
| | - Carolina Giammei
- Ludwig Boltzmann Institute Applied Diagnostics, General Hospital of Vienna, Vienna, Austria; Department of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Vienna, Austria; Department of Biomedical Imaging and Image Guided Therapy, Division of Nuclear Medicine, Medical University of Vienna, Vienna, Austria
| | - Xabier Guarrochena
- Ludwig Boltzmann Institute Applied Diagnostics, General Hospital of Vienna, Vienna, Austria; Department of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Vienna, Austria; Department of Biomedical Imaging and Image Guided Therapy, Division of Nuclear Medicine, Medical University of Vienna, Vienna, Austria
| | - Barbara Happl
- Ludwig Boltzmann Institute Applied Diagnostics, General Hospital of Vienna, Vienna, Austria; Department of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Vienna, Austria; Department of Biomedical Imaging and Image Guided Therapy, Division of Nuclear Medicine, Medical University of Vienna, Vienna, Austria
| | - Nedra Jouini
- Ludwig Boltzmann Institute Applied Diagnostics, General Hospital of Vienna, Vienna, Austria; Department of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Vienna, Austria; Department of Biomedical Imaging and Image Guided Therapy, Division of Nuclear Medicine, Medical University of Vienna, Vienna, Austria
| | - Thomas L Mindt
- Ludwig Boltzmann Institute Applied Diagnostics, General Hospital of Vienna, Vienna, Austria; Department of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Vienna, Austria; Department of Biomedical Imaging and Image Guided Therapy, Division of Nuclear Medicine, Medical University of Vienna, Vienna, Austria.
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8
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Alkane oxidation reactivity of homogeneous and heterogeneous metal complex catalysts with mesoporous silica-immobilized (2-pyridylmethyl)amine type ligands. MOLECULAR CATALYSIS 2017. [DOI: 10.1016/j.mcat.2017.09.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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9
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Römhild K, Fischer CA, Mindt TL. Glycated 99m Tc-Tricarbonyl-Labeled Peptide Conjugates for Tumor Targeting by "Click-to-Chelate". ChemMedChem 2016; 12:66-74. [PMID: 27902882 DOI: 10.1002/cmdc.201600485] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 10/25/2016] [Indexed: 12/29/2022]
Abstract
Attaching polar pharmacological modifiers to molecular imaging probes is a common strategy to modulate their pharmacokinetic profiles to improve such parameters as the clearance rate of radiotracers and/or metabolites, and to enhance signal-to-background ratios. We combined the tumor-targeting peptide sequence of bombesin (BBN) with glucuronic acid and the single-photon emission computed tomography (SPECT) radionuclide 99m Tc by the "click-to-chelate" methodology. The 99m Tc-tricarbonyl-labeled glucuronated BBN conjugate was compared with a reference compound lacking the carbohydrate. The radiolabeled conjugates displayed similar characteristics in vitro (cell internalization, receptor affinity), but the hydrophilicity of the glycated version was significantly increased. While the tumor uptake of the two radioconjugates in xenografted mice was similar, the glycated peptide exhibited unexpected higher uptake in organs of the hepatobiliary excretion pathway than the more lipophilic reference compound. Control experiments suggest that this may be the result of unspecific accumulation of metabolites in which the glucuronic acid moiety does not act as an innocent pharmacological modifier.
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Affiliation(s)
- Karolin Römhild
- Division of Radiopharmaceutical Chemistry, University of Basel, Petersgraben 4, 4031, Basel, Switzerland
| | - Christiane A Fischer
- Division of Radiopharmaceutical Chemistry, University of Basel, Petersgraben 4, 4031, Basel, Switzerland
| | - Thomas L Mindt
- Division of Radiopharmaceutical Chemistry, University of Basel, Petersgraben 4, 4031, Basel, Switzerland.,Institute of Pharmaceutical Sciences, ETH Zurich, Vladimir-Prelog-Weg 4, 8093, Zurich, Switzerland.,Ludwig Boltzmann Institute Applied Diagnostics, General Hospital of Vienna, Währinger Gürtel 18-20, 1090, Vienna, Austria
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10
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Eychenne R, Guizani S, Wang J, Picard C, Malek N, Fabre P, Wolff M, Machura B, Saffon N, Lepareur N, Benoist E. Rhenium Complexes Based on an N
2
O Tridentate Click Scaffold: From Synthesis, Structural and Theoretical Characterization to a Radiolabelling Study. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600877] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Romain Eychenne
- CNRS, Laboratoire de Synthèse et Physico‐Chimie de Molécules d'Intérêt Biologique SPCMIB UMR 5068 118, route de Narbonne 31062 Toulouse Cedex 9 France
- Université de Toulouse UPS, Laboratoire de Synthèse et Physico‐Chimie de Molécules d'Intérêt Biologique SPCMIB UMR 5068 118, route de Narbonne 31062 Toulouse Cedex 9 France
| | - Sihem Guizani
- Radiopharmaceutical Unit Centre National des Sciences et Technologies Nucléaires 2020 Sidi Thabet Tunisia
| | - Jin‐Hui Wang
- CNRS, Laboratoire de Synthèse et Physico‐Chimie de Molécules d'Intérêt Biologique SPCMIB UMR 5068 118, route de Narbonne 31062 Toulouse Cedex 9 France
- Université de Toulouse UPS, Laboratoire de Synthèse et Physico‐Chimie de Molécules d'Intérêt Biologique SPCMIB UMR 5068 118, route de Narbonne 31062 Toulouse Cedex 9 France
| | - Claude Picard
- CNRS, Laboratoire de Synthèse et Physico‐Chimie de Molécules d'Intérêt Biologique SPCMIB UMR 5068 118, route de Narbonne 31062 Toulouse Cedex 9 France
- Université de Toulouse UPS, Laboratoire de Synthèse et Physico‐Chimie de Molécules d'Intérêt Biologique SPCMIB UMR 5068 118, route de Narbonne 31062 Toulouse Cedex 9 France
| | - Nadia Malek
- Radiopharmaceutical Unit Centre National des Sciences et Technologies Nucléaires 2020 Sidi Thabet Tunisia
| | - Paul‐Louis Fabre
- Université de Toulouse III UPS PHARMA‐DEV UMR 152 118 Route de Narbonne, 31062 9 Toulouse Cedex France
- IRD PHARMA‐DEV UMR 152 9 Toulouse Cedex France
| | - Mariusz Wolff
- Université catholique de Louvain Institut de la matière condensée et des nanosciences Place Louis Pasteur 1 1348 Louvain‐la‐Neuve Belgium
- University of Silesia Department of Crystallography Institute of Chemistry 40‐006 Katowice Poland
| | - Barbara Machura
- University of Silesia Department of Crystallography Institute of Chemistry 40‐006 Katowice Poland
| | - Nathalie Saffon
- Université de Toulouse UPS and CNRS Institut de Chimie de Toulouse FR2599 118, route de Narbonne 31062 Toulouse Cedex 9 France
| | - Nicolas Lepareur
- Centre Eugène Marquis Nuclear Medicine Department Avenue de la Bataille Flandres‐Dunkerque, CS 44229 35042 Rennes France
- INSERM Foie Métabolismes et Cancer, UMR‐S 991 35033 Rennes France
| | - Eric Benoist
- Université de Toulouse UPS, Laboratoire de Synthèse et Physico‐Chimie de Molécules d'Intérêt Biologique SPCMIB UMR 5068 118, route de Narbonne 31062 Toulouse Cedex 9 France
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11
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Kharissova OV, Méndez-Rojas MA, Kharisov BI, Méndez UO, Martínez PE. Metal complexes containing natural and and artificial radioactive elements and their applications. Molecules 2014; 19:10755-802. [PMID: 25061724 PMCID: PMC6272025 DOI: 10.3390/molecules190810755] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2014] [Revised: 07/09/2014] [Accepted: 07/11/2014] [Indexed: 12/13/2022] Open
Abstract
Recent advances (during the 2007–2014 period) in the coordination and organometallic chemistry of compounds containing natural and artificially prepared radionuclides (actinides and technetium), are reviewed. Radioactive isotopes of naturally stable elements are not included for discussion in this work. Actinide and technetium complexes with O-, N-, N,O, N,S-, P-containing ligands, as well π-organometallics are discussed from the view point of their synthesis, properties, and main applications. On the basis of their properties, several mono-, bi-, tri-, tetra- or polydentate ligands have been designed for specific recognition of some particular radionuclides, and can be used in the processes of nuclear waste remediation, i.e., recycling of nuclear fuel and the separation of actinides and fission products from waste solutions or for analytical determination of actinides in solutions; actinide metal complexes are also usefulas catalysts forcoupling gaseous carbon monoxide, as well as antimicrobial and anti-fungi agents due to their biological activity. Radioactive labeling based on the short-lived metastable nuclide technetium-99m (99mTc) for biomedical use as heart, lung, kidney, bone, brain, liver or cancer imaging agents is also discussed. Finally, the promising applications of technetium labeling of nanomaterials, with potential applications as drug transport and delivery vehicles, radiotherapeutic agents or radiotracers for monitoring metabolic pathways, are also described.
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Affiliation(s)
- Oxana V Kharissova
- Facultad de Ciencias Químicas, Universidad Autónoma de Nuevo León, Ciudad Universitaria, Monterrey, N.L. C.P. 66450, Mexico
| | - Miguel A Méndez-Rojas
- Departamento de Ciencias Químico-Biológicas, Universidad de las Américas Puebla, Sta. Catarina Mártir, Cholula, Puebla. C.P. 72810, Mexico
| | - Boris I Kharisov
- Facultad de Ciencias Químicas, Universidad Autónoma de Nuevo León, Ciudad Universitaria, Monterrey, N.L. C.P. 66450, Mexico.
| | - Ubaldo Ortiz Méndez
- Facultad de Ciencias Químicas, Universidad Autónoma de Nuevo León, Ciudad Universitaria, Monterrey, N.L. C.P. 66450, Mexico
| | - Perla Elizondo Martínez
- Facultad de Ciencias Químicas, Universidad Autónoma de Nuevo León, Ciudad Universitaria, Monterrey, N.L. C.P. 66450, Mexico
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12
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A bombesin-shepherdin radioconjugate designed for combined extra- and intracellular targeting. Pharmaceuticals (Basel) 2014; 7:662-75. [PMID: 24871806 PMCID: PMC4078514 DOI: 10.3390/ph7060662] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Revised: 05/17/2014] [Accepted: 05/20/2014] [Indexed: 12/28/2022] Open
Abstract
Radiolabeled peptides which target tumor-specific membrane structures of cancer cells represent a promising class of targeted radiopharmaceuticals for the diagnosis and therapy of cancer. A potential drawback of a number of reported radiopeptides is the rapid washout of a substantial fraction of the initially delivered radioactivity from cancer cells and tumors. This renders the initial targeting effort in part futile and results in a lower imaging quality and efficacy of the radiotracer than achievable. We are investigating the combination of internalizing radiopeptides with molecular entities specific for an intracellular target. By enabling intracellular interactions of the radioconjugate, we aim at reducing/decelerating the externalization of radioactivity from cancer cells. Using the “click-to-chelate” approach, the 99mTc-tricarbonyl core as a reporter probe for single-photon emission computed tomography (SPECT) was combined with the binding sequence of bombesin for extracellular targeting of the gastrin-releasing peptide receptor (GRP-r) and peptidic inhibitors of the cytosolic heat shock 90 protein (Hsp90) for intracellular targeting. Receptor-specific uptake of the multifunctional radioconjugate could be confirmed, however, the cellular washout of radioactivity was not improved. We assume that either endosomal trapping or lysosomal degradation of the radioconjugate is accountable for these observations.
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13
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Barandov A, Grünstein D, Apostolova I, Buchert R, Roger M, Brenner W, Abram U, Seeberger PH. A new bifunctional chelator enables facile biocoupling and radiolabeling as the basis for a bioconjugation kit. Chembiochem 2014; 15:986-94. [PMID: 24723504 DOI: 10.1002/cbic.201400001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2014] [Indexed: 12/24/2022]
Abstract
A new tridentate bifunctional chelator, N-(-2-picolyl)(-4-hydroxy)(-3-amino)benzoic acid (PHAB), was designed to efficiently coordinate the [(99m)Tc(CO)3](+) core and facilitate coupling reactions to biomolecules. The chelator can be procured in the form of the corresponding benzotriazole ester (PHAB-OBT), which can be stored and used as a bioconjugation kit. PHAB-OBT reacts with modified carbohydrates with high selectivity and efficiency in a single step in both aqueous and organic media. As is desirable for a kit, no complicated chemical bench work is required. Glycoconjugate postlabeling resulted in neutral radiolabeled glycans with high radiochemical yields. Prelabeling approaches were assessed by successive reaction of PHAB-OBT with the [(99m)Tc(CO)3](+) core and a modified galactose model. The radiolabeled galactose was obtained in 84% yield as defined by HPLC analysis. Biodistribution of the radioactive (99m)Tc-labeled chelator, as well as the glycoconjugates, were examined in mice. Noticeably different biodistribution patterns were observed that reflect trends in the uptake of carbohydrate analogues by various organs.
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Affiliation(s)
- Ali Barandov
- Max-Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam (Germany); Institute of Chemistry and Biochemistry, Freie Universität Berlin, Arnimallee 22, 14195 Berlin (Germany)
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Synthesis, characterization, and biological studies of emissive rhenium–glutamine conjugates. J Biol Inorg Chem 2013; 18:831-44. [DOI: 10.1007/s00775-013-1023-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Accepted: 07/03/2013] [Indexed: 12/23/2022]
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15
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Liu Z, Li Y, Lozada J, Wong MQ, Greene J, Lin KS, Yapp D, Perrin DM. Kit-like 18F-labeling of RGD-19F-arytrifluroborate in high yield and at extraordinarily high specific activity with preliminary in vivo tumor imaging. Nucl Med Biol 2013; 40:841-9. [PMID: 23810487 DOI: 10.1016/j.nucmedbio.2013.05.002] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Revised: 05/01/2013] [Accepted: 05/07/2013] [Indexed: 02/01/2023]
Abstract
INTRODUCTION Positron Emission Tomography (PET) is a rapidly expanding, cutting edge technology for preclinical evaluation, cancer diagnosis and staging, and patient management. A one-step aqueous (18)F-labeling method, which can be applied to peptides to provide functional in vivo images, has been a long-standing challenge in PET imaging. Over the past few years, we have sought a rapid and mild radiolabeling method based on the aqueous radiosynthesis of in vivo stable aryltrifluoroborate (ArBF(3)(-)) conjugates. Recent access to production levels of (18)F-Fluoride led to a fluorescent-(18)F-ArBF(3)(-) at unprecedentedly high specific activities of 15Ci/μmol. However, extending this method to labeling peptides as imaging agents has not been explored. METHODS In order to extend these results to a peptide of clinical interest in the context of production-level radiosynthesis, we applied this new technology for labeling RGD, measured its specific activity by standard curve analysis, and carried out a preliminary evaluation of its imaging properties. RESULTS RGD was labeled in excellent radiochemical yields at exceptionally high specific activity (~14Ci/μmol) (n = 3). Preliminary tumor-specific images corroborated by ex vivo biodistribution data with blocking controls show statistically significant albeit relatively low tumor uptake along with reasonably high tumor:blood ratios (n = 3). CONCLUSIONS Isotope exchange on a clinically useful (18)F-ArBF(3)(-) radiotracer leads to excellent radiochemical yields and exceptionally high specific activities while the anionic nature of the aryltrifluoroborate prosthetic results in very rapid clearance. Since rapid clearance of the radioactive tracer is generally desirable for tracer development, these results suggest new directions for varying linker arm composition to slightly retard clearance rather than enhancing it. ADVANCES IN KNOWLEDGE AND IMPLICATIONS FOR PATIENT CARE This work is the first to use production levels of (18)F-activity to directly label RGD at specific activities that are an order of magnitude higher than most reports and thereby increases the distribution window for radiotracer production and delivery.
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Affiliation(s)
- Zhibo Liu
- Chemistry Department, 2036 Main Mall, University of British Columbia, Vancouver, B.C., Canada
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16
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Nakazawa J, Hori T, Stack TDP, Hikichi S. Alkane Oxidation by an Immobilized Nickel Complex Catalyst: Structural and Reactivity Differences Induced by Surface-Ligand Density on Mesoporous Silica. Chem Asian J 2013; 8:1191-9. [DOI: 10.1002/asia.201300165] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2013] [Indexed: 11/06/2022]
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17
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Click-to-Chelate: development of technetium and rhenium-tricarbonyl labeled radiopharmaceuticals. Molecules 2013; 18:3206-26. [PMID: 23481882 PMCID: PMC6270534 DOI: 10.3390/molecules18033206] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Revised: 03/05/2013] [Accepted: 03/06/2013] [Indexed: 12/31/2022] Open
Abstract
The Click-to-Chelate approach is a highly efficient strategy for the radiolabeling of molecules of medicinal interest with technetium and rhenium-tricarbonyl cores. Reaction of azide-functionalized molecules with alkyne prochelators by the Cu(I)-catalyzed azide-alkyne cycloaddition (CuAAC; click reaction) enables the simultaneous synthesis and conjugation of tridentate chelating systems for the stable complexation of the radiometals. In many cases, the functionalization of (bio)molecules with the ligand system and radiolabeling can be achieved by convenient one-pot procedures. Since its first report in 2006, Click-to-Chelate has been applied to the development of numerous novel radiotracers with promising potential for translation into the clinic. This review summarizes the use of the Click-to-Chelate approach in radiopharmaceutical sciences and provides a perspective for future applications.
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18
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Kluba CA, Bauman A, Valverde IE, Vomstein S, Mindt TL. Dual-targeting conjugates designed to improve the efficacy of radiolabeled peptides. Org Biomol Chem 2012; 10:7594-602. [PMID: 22898743 DOI: 10.1039/c2ob26127h] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Radiolabeled regulatory peptides are useful tools in nuclear medicine for the diagnosis (imaging) and therapy of cancer. The specificity of the peptides towards GPC receptors, which are overexpressed by cancer cells, and their favorable pharmacokinetic profile make them ideal vectors to transport conjugated radionuclides to tumors and metastases. However, after internalization of the radiopeptide into cancer cells and tumors, a rapid washout of a substantial fraction of the delivered radioactivity is often observed. This phenomenon may represent a limitation of radiopeptides for clinical applications. Here, we report the synthesis, radiolabeling, stability, and in vitro evaluation of a novel, dual-targeting peptide radioconjugate designed to enhance the cellular retention of radioactivity. The described trifunctional conjugate is comprised of a Tc-99m SPECT reporter probe, a cell membrane receptor-specific peptide, and a second targeting entity directed towards mitochondria. While the specificity of the first generation of dual-targeting conjugates towards its extracellular target was demonstrated, intracellular targeting could not be confirmed probably due to non-specific binding or hindered passage through the membrane of the organelle. The work presented describes a novel approach with potential to improve the efficacy of radiopharmaceuticals by enhancing the intracellular retention of radioactivity.
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Affiliation(s)
- Christiane A Kluba
- University of Basel Hospital, Department of Radiology and Nuclear Medicine, Division of Radiological Chemistry, Petersgraben 4, 4031 Basel, Switzerland
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19
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Novel imaging chelates for drug discovery. Curr Opin Pharmacol 2012; 12:576-82. [PMID: 22884905 DOI: 10.1016/j.coph.2012.07.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2012] [Revised: 07/08/2012] [Accepted: 07/12/2012] [Indexed: 01/07/2023]
Abstract
The introduction of organic frameworks designed to coordinate metal ions or chelates to medical imaging has allowed for significant breakthroughs in the identification of many disease states. These identified disease states such as cancerous, cardiovascular and neurological, which provide excellent targets for novel drugs, and without the imaging chelates would certainly not have been discovered. In this article we will present a series of novel imaging chelates that have influenced drug discovery.
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20
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Morais GR, Paulo A, Santos I. Organometallic Complexes for SPECT Imaging and/or Radionuclide Therapy. Organometallics 2012. [DOI: 10.1021/om300501d] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Goreti Ribeiro Morais
- Unidade de Ciências
Quı́micas e Radiofarmacêuticas, Instituto
Tecnológico e Nuclear, Instituto Superior Técnico, Universidade Técnica de Lisboa, Estrada Nacional
10, 2686-953, Sacavém, Portugal
| | - António Paulo
- Unidade de Ciências
Quı́micas e Radiofarmacêuticas, Instituto
Tecnológico e Nuclear, Instituto Superior Técnico, Universidade Técnica de Lisboa, Estrada Nacional
10, 2686-953, Sacavém, Portugal
| | - Isabel Santos
- Unidade de Ciências
Quı́micas e Radiofarmacêuticas, Instituto
Tecnológico e Nuclear, Instituto Superior Técnico, Universidade Técnica de Lisboa, Estrada Nacional
10, 2686-953, Sacavém, Portugal
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Schmid F, Höltke C, Parker D, Faber C. Boosting19F MRI-SNR efficient detection of paramagnetic contrast agents using ultrafast sequences. Magn Reson Med 2012; 69:1056-62. [DOI: 10.1002/mrm.24341] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2012] [Revised: 04/24/2012] [Accepted: 04/26/2012] [Indexed: 01/26/2023]
Affiliation(s)
- Florian Schmid
- Department of Clinical Radiology; University Hospital Münster; Münster; Germany
| | - Carsten Höltke
- Department of Clinical Radiology; University Hospital Münster; Münster; Germany
| | - David Parker
- Department of Chemistry; Durham University; Durham; United Kingdom
| | - Cornelius Faber
- Department of Clinical Radiology; University Hospital Münster; Münster; Germany
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Crowley JD, McMorran DA. “Click-Triazole” Coordination Chemistry: Exploiting 1,4-Disubstituted-1,2,3-Triazoles as Ligands. TOPICS IN HETEROCYCLIC CHEMISTRY 2012. [DOI: 10.1007/7081_2011_67] [Citation(s) in RCA: 103] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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23
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Suchý M, Milne M, Li AX, McVicar N, Dodd DW, Bartha R, Hudson RHE. Mono- and Tetraalkyne Modified Ligands and Their Eu3+ Complexes - Utilizing “Click” Chemistry to Expand the Scope of Conjugation Chemistry. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100945] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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24
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Scott SØ, Gavey EL, Lind SJ, Gordon KC, Crowley JD. Self-assembled palladium(II) "click" cages: synthesis, structural modification and stability. Dalton Trans 2011; 40:12117-24. [PMID: 21792428 DOI: 10.1039/c1dt10551e] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Readily synthesised and functionalised di-1,2,3-triazole "click" ligands are shown to self-assemble into coordinatively saturated, quadruply stranded helical [Pd(2)L(4)](BF(4))(4) cages with Pd(II) ions. The cages have been fully characterised by elemental analysis, HR-ESMS, IR, (1)H, (13)C and DOSY NMR, DFT calculations, and in one case by X-ray crystallography. By exploiting the CuAAC "click" reaction we were able to rapidly generate a small family of di-1,2,3-triazole ligands with different core spacer units and peripheral substituents and examine how these structural modifications affected the formation of the [Pd(2)L(4)](BF(4))(4) cages. The use of both flexible (1,3-propyl) and rigid (1,3-phenyl) core spacer units led to the formation of discrete [Pd(2)L(4)](BF(4))(4) cage complexes. However, when the spacer unit of the di-1,2,3-triazole ligand was a 1,4-substituted-phenyl group steric interactions led to the formation of an oligomeric/polymeric species. By keeping the 1,3-phenyl core spacer constant the effect of altering the "click" ligands' peripheral substituents was also examined. It was shown that ligands with alkyl, phenyl, electron-rich and electron-poor benzyl substituents all quantitatively formed [Pd(2)L(4)](BF(4))(4) cage complexes. The results suggest that a wide range of functionalised palladium(II) "click" cages could be rapidly generated. These novel molecules may potentially find uses in catalysis, molecular recognition and drug delivery.
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Affiliation(s)
- Synøve Ø Scott
- Department of Chemistry, University of Otago, PO Box 56, Dunedin, New Zealand
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25
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Beck W. Metal Complexes of Biologically Important Ligands, CLXXVI.[1] Formation of Peptides within the Coordination Sphere of Metal Ions and of Classical and Organometallic Complexes and Some Aspects of Prebiotic Chemistry. Z Anorg Allg Chem 2011. [DOI: 10.1002/zaac.201100137] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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26
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Kilpin KJ, Gavey EL, McAdam CJ, Anderson CB, Lind SJ, Keep CC, Gordon KC, Crowley JD. Palladium(II) Complexes of Readily Functionalized Bidentate 2-Pyridyl-1,2,3-triazole “Click” Ligands: A Synthetic, Structural, Spectroscopic, and Computational Study. Inorg Chem 2011; 50:6334-46. [DOI: 10.1021/ic200789b] [Citation(s) in RCA: 101] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Kelly J. Kilpin
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin, New Zealand
| | - Emma L. Gavey
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin, New Zealand
| | - C. John McAdam
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin, New Zealand
| | | | - Samuel J. Lind
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin, New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology, New Zealand
| | - Courtney C. Keep
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin, New Zealand
| | - Keith C. Gordon
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin, New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology, New Zealand
| | - James D. Crowley
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin, New Zealand
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