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Hilton JBW, Kysenius K, Liddell JR, Mercer SW, Hare DJ, Buncic G, Paul B, Wang Y, Murray SS, Kilpatrick TJ, White AR, Donnelly PS, Crouch PJ. Evidence for decreased copper associated with demyelination in the corpus callosum of cuprizone-treated mice. Metallomics 2024; 16:mfad072. [PMID: 38178638 PMCID: PMC10797489 DOI: 10.1093/mtomcs/mfad072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 11/24/2023] [Indexed: 01/06/2024]
Abstract
Demyelination within the central nervous system (CNS) is a significant feature of debilitating neurological diseases such as multiple sclerosis and administering the copper-selective chelatorcuprizone to mice is widely used to model demyelination in vivo. Conspicuous demyelination within the corpus callosum is generally attributed to cuprizone's ability to restrict copper availability in this vulnerable brain region. However, the small number of studies that have assessed copper in brain tissue from cuprizone-treated mice have produced seemingly conflicting outcomes, leaving the role of CNS copper availability in demyelination unresolved. Herein we describe our assessment of copper concentrations in brain samples from mice treated with cuprizone for 40 d. Importantly, we applied an inductively coupled plasma mass spectrometry methodology that enabled assessment of copper partitioned into soluble and insoluble fractions within distinct brain regions, including the corpus callosum. Our results show that cuprizone-induced demyelination in the corpus callosum was associated with decreased soluble copper in this brain region. Insoluble copper in the corpus callosum was unaffected, as were pools of soluble and insoluble copper in other brain regions. Treatment with the blood-brain barrier permeant copper compound CuII(atsm) increased brain copper levels and this was most pronounced in the soluble fraction of the corpus callosum. This effect was associated with significant mitigation of cuprizone-induced demyelination. These results provide support for the involvement of decreased CNS copper availability in demyelination in the cuprizone model. Relevance to human demyelinating disease is discussed.
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Affiliation(s)
- James B W Hilton
- Department of Anatomy & Physiology, The University of Melbourne, Victoria 3010, Australia
| | - Kai Kysenius
- Department of Anatomy & Physiology, The University of Melbourne, Victoria 3010, Australia
- Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Victoria 3010, Australia
| | - Jeffrey R Liddell
- Department of Anatomy & Physiology, The University of Melbourne, Victoria 3010, Australia
| | - Stephen W Mercer
- Department of Anatomy & Physiology, The University of Melbourne, Victoria 3010, Australia
| | - Dominic J Hare
- Atomic Medicine Initiative, University of Technology Sydney, Sydney, New South Wales 2007, Australia
| | - Gojko Buncic
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Victoria 3010, Australia
| | - Bence Paul
- School of Earth Sciences, The University of Melbourne, Victoria 3010, Australia
| | - YouJia Wang
- Department of Anatomy & Physiology, The University of Melbourne, Victoria 3010, Australia
| | - Simon S Murray
- Department of Anatomy & Physiology, The University of Melbourne, Victoria 3010, Australia
- Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Victoria 3010, Australia
| | - Trevor J Kilpatrick
- Department of Anatomy & Physiology, The University of Melbourne, Victoria 3010, Australia
- Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Victoria 3010, Australia
| | - Anthony R White
- Queensland Institute of Medical Research Berghofer, Herston, Queensland 4006, Australia
| | - Paul S Donnelly
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Victoria 3010, Australia
| | - Peter J Crouch
- Department of Anatomy & Physiology, The University of Melbourne, Victoria 3010, Australia
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Zia NA, Cullinane C, Van Zuylekom JK, Waldeck K, McInnes LE, Buncic G, Haskali MB, Roselt PD, Hicks RJ, Donnelly PS. A Bivalent Inhibitor of Prostate Specific Membrane Antigen Radiolabeled with Copper‐64 with High Tumor Uptake and Retention. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Nicholas A. Zia
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute University of Melbourne Melbourne 3010 Vic. Australia
| | - Carleen Cullinane
- Sir Peter MacCallum Department of Oncology University of Melbourne Melbourne 3010 Vic. Australia
- Research Division Peter MacCallum Cancer Centre Melbourne Victoria 3000 Australia
| | | | - Kelly Waldeck
- Research Division Peter MacCallum Cancer Centre Melbourne Victoria 3000 Australia
| | - Lachlan E. McInnes
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute University of Melbourne Melbourne 3010 Vic. Australia
| | - Gojko Buncic
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute University of Melbourne Melbourne 3010 Vic. Australia
| | - Mohammad B. Haskali
- Centre for Cancer Imaging Peter MacCallum Cancer Centre Melbourne Victoria 3000 Australia
| | - Peter D. Roselt
- Centre for Cancer Imaging Peter MacCallum Cancer Centre Melbourne Victoria 3000 Australia
| | - Rodney J. Hicks
- Sir Peter MacCallum Department of Oncology University of Melbourne Melbourne 3010 Vic. Australia
- Research Division Peter MacCallum Cancer Centre Melbourne Victoria 3000 Australia
- Centre for Cancer Imaging Peter MacCallum Cancer Centre Melbourne Victoria 3000 Australia
| | - Paul S. Donnelly
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute University of Melbourne Melbourne 3010 Vic. Australia
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Zia NA, Cullinane C, Van Zuylekom JK, Waldeck K, McInnes LE, Buncic G, Haskali MB, Roselt PD, Hicks RJ, Donnelly PS. A Bivalent Inhibitor of Prostate Specific Membrane Antigen Radiolabeled with Copper‐64 with High Tumor Uptake and Retention. Angew Chem Int Ed Engl 2019; 58:14991-14994. [DOI: 10.1002/anie.201908964] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Nicholas A. Zia
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute University of Melbourne Melbourne 3010 Vic. Australia
| | - Carleen Cullinane
- Sir Peter MacCallum Department of Oncology University of Melbourne Melbourne 3010 Vic. Australia
- Research Division Peter MacCallum Cancer Centre Melbourne Victoria 3000 Australia
| | | | - Kelly Waldeck
- Research Division Peter MacCallum Cancer Centre Melbourne Victoria 3000 Australia
| | - Lachlan E. McInnes
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute University of Melbourne Melbourne 3010 Vic. Australia
| | - Gojko Buncic
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute University of Melbourne Melbourne 3010 Vic. Australia
| | - Mohammad B. Haskali
- Centre for Cancer Imaging Peter MacCallum Cancer Centre Melbourne Victoria 3000 Australia
| | - Peter D. Roselt
- Centre for Cancer Imaging Peter MacCallum Cancer Centre Melbourne Victoria 3000 Australia
| | - Rodney J. Hicks
- Sir Peter MacCallum Department of Oncology University of Melbourne Melbourne 3010 Vic. Australia
- Research Division Peter MacCallum Cancer Centre Melbourne Victoria 3000 Australia
- Centre for Cancer Imaging Peter MacCallum Cancer Centre Melbourne Victoria 3000 Australia
| | - Paul S. Donnelly
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute University of Melbourne Melbourne 3010 Vic. Australia
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Paterson BM, Buncic G, McInnes LE, Roselt P, Cullinane C, Binns DS, Jeffery CM, Price RI, Hicks RJ, Donnelly PS. Bifunctional (64)Cu-labelled macrobicyclic cage amine isothiocyanates for immuno-positron emission tomography. Dalton Trans 2015; 44:4901-9. [PMID: 25351329 DOI: 10.1039/c4dt02983f] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New macrobicyclic cage amine or "sarcophagine" (sar) bifunctional chelators have been synthesised that form copper complexes of exceptional in vivo stability and incorporate isothiocyanate (-NCS) functional groups for conjugation to an antibody. The chelators were synthesised from the methyl-capped complex [Mg(II)(CH3)(NH2)sar](2+). Coordination of Mg(II) within the cavity of the cage amine ligand protects the secondary amine atoms from reacting with the -NCS functional groups. Two different [Mg(II)(NCS-sar)](2+) derivatives were conjugated to the HER2/neu-targeting antibody trastuzumab and the progress of the reaction monitored by electrospray mass spectrometry. The Mg(II) ion was removed from the immunoconjugates under mild conditions (0.1 M citrate buffer, pH 6). Labelling of the (CH3)(p-NCS-Ph)sar-trastuzumab conjugate with (64)Cu(II), a radioisotope suitable for positron emission tomography (PET), was fast (∼5 min) and easily performed at room temperature with high radiochemical purity (>95%). Biodistribution and PET imaging studies in vivo showed that (64)Cu-labelled (CH3)(p-NCS-Ph)sar-trastuzumab maintained high stability under physiological conditions with high and selective uptake in a HER2-positive cancer cell line. The stability of the copper complex and the 12.7 h half-life of the radioisotope allows clear visualisation of tumours out to 48 h.
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Affiliation(s)
- Brett M Paterson
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, VIC, Australia.
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Hickey JL, James JL, Henderson CA, Price KA, Mot AI, Buncic G, Crouch PJ, White JM, White AR, Smith TA, Donnelly PS. Intracellular Distribution of Fluorescent Copper and Zinc Bis(thiosemicarbazonato) Complexes Measured with Fluorescence Lifetime Spectroscopy. Inorg Chem 2015; 54:9556-67. [DOI: 10.1021/acs.inorgchem.5b01599] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
| | - Janine L. James
- The Florey Institute of Neuroscience and Mental Health, Parkville, Melbourne, Victoria 3052, Australia
| | | | - Katherine A. Price
- The Florey Institute of Neuroscience and Mental Health, Parkville, Melbourne, Victoria 3052, Australia
| | - Alexandra I. Mot
- The Florey Institute of Neuroscience and Mental Health, Parkville, Melbourne, Victoria 3052, Australia
| | | | - Peter J. Crouch
- The Florey Institute of Neuroscience and Mental Health, Parkville, Melbourne, Victoria 3052, Australia
| | | | - Anthony R. White
- The Florey Institute of Neuroscience and Mental Health, Parkville, Melbourne, Victoria 3052, Australia
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Alt K, Paterson BM, Ardipradja K, Schieber C, Buncic G, Lim B, Poniger SS, Jakoby B, Wang X, O'Keefe GJ, Tochon-Danguy HJ, Scott AM, Ackermann U, Peter K, Donnelly PS, Hagemeyer CE. Single-chain antibody conjugated to a cage amine chelator and labeled with positron-emitting copper-64 for diagnostic imaging of activated platelets. Mol Pharm 2014; 11:2855-63. [PMID: 24999533 DOI: 10.1021/mp500209a] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Imaging of activated platelets using an activation specific anti-GPIIb/IIIa integrin single-chain antibody (scFvanti-LIBS) conjugated to a positron emitting copper-64 complex of a cage amine sarcophagine chelator (MeCOSar) is reported. This tracer was compared in vitro to a (64)Cu(II) complex of the scFv conjugated to another commonly used macrocycle, DOTA. The scFvanti-LIBS-MeCOSar conjugate was radiolabeled with (64)Cu(II) rapidly under mild conditions and with higher specific activity than scFvanti-LIBS-DOTA. The utility of scFvanti-LIBS-MeCOSar as a diagnostic agent was assessed in vivo in a mouse model of acute thrombosis. The uptake of scFvanti-LIBS-(64)CuMeCOSar in the injured vessel was significantly higher than the noninjured vessel. Positron emission tomography (PET) was used to show accumulation of scFvanti-LIBS-(64)CuMeCOSar with high and specific uptake in the injured vessel. ScFvanti-LIBS-(64)CuMeCOSar is an excellent tool for highly sensitive in vivo detection of activated platelets in PET and has the potential to be used for early diagnosis of acute thrombotic events.
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Affiliation(s)
- Karen Alt
- Vascular Biotechnology Laboratory, Baker IDI , Melbourne, Australia
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Buncic G, Xiao Z, Drew SC, White JM, Wedd AG, Donnelly PS. Copper complexes of a novel non-innocent quadridentate ligand. Chem Commun (Camb) 2012; 48:2570-2. [DOI: 10.1039/c2cc16658e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Buncic G, Hickey JL, Schieber C, White JM, Crouch PJ, White AR, Xiao Z, Wedd AG, Donnelly PS. Water-soluble Bis(thiosemicarbazonato)copper(II) Complexes. Aust J Chem 2011. [DOI: 10.1071/ch10463] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The synthesis of four new water-soluble bis(thiosemicarbazone) ligands and their copper(ii) complexes is presented and their potential to be new ligands for copper radiopharmaceuticals is discussed. The ligands and complexes have been characterized by a combination of NMR spectroscopy, mass spectrometry, and X-ray crystallography. The electrochemical behaviour of two of the copper(ii) complexes was investigated by cyclic voltammetry and revealed that both complexes exhibited a quasi-reversible redox process attributed to a CuII/CuI process. Two of the new ligands were radiolabelled with positron-emitting 64Cu with a view to assessing their potential as ligands that bind radioactive copper isotopes for application in diagnostic radiopharmaceuticals. The cellular uptake of the copper complexes was investigated in SH-SY5Y cells.
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Buncic G, Donnelly PS, Paterson BM, White JM, Zimmermann M, Xiao Z, Wedd AG. A Water-Soluble Bis(thiosemicarbazone) Ligand. A Sensitive Probe and Metal Buffer for Zinc. Inorg Chem 2010; 49:3071-3. [DOI: 10.1021/ic902370a] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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