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Dong T, Zhang Z, Li W, Zhuo W, Cui T, Li Z. Synthesis Principle and Practice with Radioactive Iodines and Astatine: Advances Made So Far. J Org Chem 2024; 89:11837-11863. [PMID: 39173032 DOI: 10.1021/acs.joc.4c00593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2024]
Abstract
Radioactive iodines and astatine, possessing distinct exploitable nuclear properties, play indispensable roles in the realms of nuclear imaging and therapy. Their analogous chemical characteristics shape the design, preparation, and substrate range for tracers labeled with these radiohalogens through interconnected radiosynthetic chemistry. This perspective systematically explores the labeling methods by types of halogenating reagents─nucleophilic and electrophilic─underpinning the rational design of such compounds. It delves into the rapidly evolving synthetic strategies and reactions in radioiodination and radioastatination over the past decade, comparing their intrinsic relationships and highlighting variations. This comparative analysis illuminates potential radiosynthetic methods for exploration. Moreover, stability concerns related to compounds labeled with radioactive iodines and astatine are addressed, offering valuable insights for radiochemists and physicians alike.
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Affiliation(s)
- Taotao Dong
- State Key Laboratory of Vaccines for Infectious Diseases, Center for Molecular Imaging and Translational Medicine, Xiang An Biomedicine Laboratory, School of Public Health, Xiamen University, Xiamen, Fujian 361102, China
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Innovation Platform for Industry-Education Integrations in Vaccine Research, Xiamen University, Xiamen, Fujian 361102, China
| | - Zhenru Zhang
- State Key Laboratory of Vaccines for Infectious Diseases, Center for Molecular Imaging and Translational Medicine, Xiang An Biomedicine Laboratory, School of Public Health, Xiamen University, Xiamen, Fujian 361102, China
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Innovation Platform for Industry-Education Integrations in Vaccine Research, Xiamen University, Xiamen, Fujian 361102, China
| | - Weicai Li
- State Key Laboratory of Vaccines for Infectious Diseases, Center for Molecular Imaging and Translational Medicine, Xiang An Biomedicine Laboratory, School of Public Health, Xiamen University, Xiamen, Fujian 361102, China
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Innovation Platform for Industry-Education Integrations in Vaccine Research, Xiamen University, Xiamen, Fujian 361102, China
| | - Weibin Zhuo
- Alpha Nuclide Co., Ltd., Ningbo, Zhejiang 315336, China
| | - Tongjiang Cui
- Alpha Nuclide Co., Ltd., Ningbo, Zhejiang 315336, China
| | - Zijing Li
- State Key Laboratory of Vaccines for Infectious Diseases, Center for Molecular Imaging and Translational Medicine, Xiang An Biomedicine Laboratory, School of Public Health, Xiamen University, Xiamen, Fujian 361102, China
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Innovation Platform for Industry-Education Integrations in Vaccine Research, Xiamen University, Xiamen, Fujian 361102, China
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2
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Lee DW, Kwon JI, Heo H, Woo CW, Yu NH, Kim KW, Woo DC. Cerebral Glutamate Alterations Using Chemical Exchange Saturation Transfer Imaging in a Rat Model of Lipopolysaccharide-Induced Sepsis. Metabolites 2023; 13:metabo13050636. [PMID: 37233677 DOI: 10.3390/metabo13050636] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 04/26/2023] [Accepted: 05/06/2023] [Indexed: 05/27/2023] Open
Abstract
Glutamate-weighted chemical exchange saturation transfer (GluCEST) is a useful imaging tool to detect glutamate signal alterations caused by neuroinflammation. This study aimed to visualize and quantitatively evaluate hippocampal glutamate alterations in a rat model of sepsis-induced brain injury using GluCEST and proton magnetic resonance spectroscopy (1H-MRS). Twenty-one Sprague Dawley rats were divided into three groups (sepsis-induced groups (SEP05, n = 7 and SEP10, n = 7) and controls (n = 7)). Sepsis was induced through a single intraperitoneal injection of lipopolysaccharide (LPS) at a dose of 5 mg/kg (SEP05) or 10 mg/kg (SEP10). GluCEST values and 1H-MRS concentrations in the hippocampal region were quantified using conventional magnetization transfer ratio asymmetry and a water scaling method, respectively. In addition, we examined immunohistochemical and immunofluorescence staining to observe the immune response and activity in the hippocampal region after LPS exposure. The GluCEST and 1H-MRS results showed that GluCEST values and glutamate concentrations were significantly higher in sepsis-induced rats than those in controls as the LPS dose increased. GluCEST imaging may be a helpful technique for defining biomarkers to estimate glutamate-related metabolism in sepsis-associated diseases.
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Affiliation(s)
- Do-Wan Lee
- Department of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul 05505, Republic of Korea
| | - Jae-Im Kwon
- Department of Medical Science, Asan Medical Institute of Convergence Science and Technology, University of Ulsan College of Medicine, Asan Medical Center, Seoul 05505, Republic of Korea
- Nonclinical Research Center, QuBEST BIO Inc., Giheung-gu, Yongin-si 17015, Gyeonggi-do, Republic of Korea
| | - Hwon Heo
- Department of Convergence Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul 05505, Republic of Korea
| | - Chul-Woong Woo
- Convergence Medicine Research Center, Asan Institute for Life Sciences, Asan Medical Center, Seoul 05505, Republic of Korea
| | - Na Hee Yu
- Nonclinical Research Center, QuBEST BIO Inc., Giheung-gu, Yongin-si 17015, Gyeonggi-do, Republic of Korea
| | - Kyung Won Kim
- Department of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul 05505, Republic of Korea
- Department of Medical Science, Asan Medical Institute of Convergence Science and Technology, University of Ulsan College of Medicine, Asan Medical Center, Seoul 05505, Republic of Korea
| | - Dong-Cheol Woo
- Department of Medical Science, Asan Medical Institute of Convergence Science and Technology, University of Ulsan College of Medicine, Asan Medical Center, Seoul 05505, Republic of Korea
- Department of Convergence Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul 05505, Republic of Korea
- Convergence Medicine Research Center, Asan Institute for Life Sciences, Asan Medical Center, Seoul 05505, Republic of Korea
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3
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Kondo Y, Kimura H, Sasaki I, Watanabe S, Ohshima Y, Yagi Y, Hattori Y, Koda M, Kawashima H, Yasui H, Ishioka NS. Copper-mediated radioiodination and radiobromination via aryl boronic precursor and its application to 125I/77Br–labeled prostate-specific membrane antigen imaging probes. Bioorg Med Chem 2022; 69:116915. [DOI: 10.1016/j.bmc.2022.116915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 06/27/2022] [Accepted: 06/29/2022] [Indexed: 11/02/2022]
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Kondo Y, Kimura H, Fukumoto C, Yagi Y, Hattori Y, Kawashima H, Yasui H. Copper-mediated radioiodination reaction through aryl boronic acid or ester precursor and its application to direct radiolabeling of a cyclic peptide. J Labelled Comp Radiopharm 2021; 64:336-345. [PMID: 33990983 DOI: 10.1002/jlcr.3925] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 04/16/2021] [Accepted: 05/06/2021] [Indexed: 11/06/2022]
Abstract
A copper-mediated radioiodination using aryl boronic precursors is attracting attention as a solution to oxidative iododestannylation and nickel-mediated radioiodination drawbacks. The copper-mediated radiolabeling method allows radioiodination at room temperature with stable aryl boronic precursors without preparing complex starting materials or reagents and can be performed in a reaction vessel exposed to air. This method has good potential in radiochemistry; however, studies on the scope of copper-mediated radioiodination through boronic precursors are insufficient. In particular, few reports have demonstrated the effect of protecting groups on radiolabeling efficiency. Therefore, the effect of the protecting group of aryl boronic acids on the copper-mediated radioiodination was investigated. In addition, this method, which does not require heating, is expected to be useful for direct radiolabeling of peptides. Thus, we attempted direct radioiodination of c(RGDyk) as an example. The resulting radioiodination method was well tolerated in various substrates and was unaffected by the pinacol ester-type protecting group. Also, c(RGDyk) was labeled with 125 I via copper-mediated radioiodination using an aryl boronic acid precursor. The reaction time and yield were improved, compared with the indirect method. Furthermore, the large difference in polarity between the boronic acid precursor and the radiolabeled compound facilitated purification.
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Affiliation(s)
- Yuto Kondo
- Department of Analytical and Bioinorganic Chemistry, Division of Analytical and Physical Chemistry, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Hiroyuki Kimura
- Department of Analytical and Bioinorganic Chemistry, Division of Analytical and Physical Chemistry, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Chiaki Fukumoto
- Department of Analytical and Bioinorganic Chemistry, Division of Analytical and Physical Chemistry, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Yusuke Yagi
- Department of Analytical and Bioinorganic Chemistry, Division of Analytical and Physical Chemistry, Kyoto Pharmaceutical University, Kyoto, Japan
- Department of Radiological Technology, Faculty of Medical Science, Kyoto College of Medical Science, Kyoto, Japan
| | - Yasunao Hattori
- Center for Instrumental Analysis, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Hidekazu Kawashima
- Radioisotope Research Center, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Hiroyuki Yasui
- Department of Analytical and Bioinorganic Chemistry, Division of Analytical and Physical Chemistry, Kyoto Pharmaceutical University, Kyoto, Japan
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Lee DW, Woo CW, Woo DC, Kim JK, Kim KW, Lee DH. Regional Mapping of Brain Glutamate Distributions Using Glutamate-Weighted Chemical Exchange Saturation Transfer Imaging. Diagnostics (Basel) 2020; 10:E571. [PMID: 32784483 PMCID: PMC7459654 DOI: 10.3390/diagnostics10080571] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 08/06/2020] [Accepted: 08/06/2020] [Indexed: 01/24/2023] Open
Abstract
PURPOSE To investigate glutamate signal distributions in multiple brain regions of a healthy rat brain using glutamate-weighted chemical exchange saturation transfer (GluCEST) imaging. METHOD The GluCEST data were obtained using a 7.0 T magnetic resonance imaging (MRI) scanner, and all data were analyzed using conventional magnetization transfer ratio asymmetry in eight brain regions (cortex, hippocampus, corpus callosum, and rest of midbrain in each hemisphere). GluCEST data acquisition was performed again one month later in five randomly selected rats to evaluate the stability of the GluCEST signal. To evaluate glutamate level changes calculated by GluCEST data, we compared the results with the concentration of glutamate acquired from 1H magnetic resonance spectroscopy (1H MRS) data in the cortex and hippocampus. RESULTS GluCEST signals showed significant differences (all p ≤ 0.001) between the corpus callosum (-1.71 ± 1.04%; white matter) and other brain regions (3.59 ± 0.41%, cortex; 5.47 ± 0.61%, hippocampus; 4.49 ± 1.11%, rest of midbrain; gray matter). The stability test of GluCEST findings for each brain region was not significantly different (all p ≥ 0.263). In line with the GluCEST results, glutamate concentrations measured by 1H MRS also appeared higher in the hippocampus (7.30 ± 0.16 μmol/g) than the cortex (6.89 ± 0.72 μmol/g). CONCLUSION Mapping of GluCEST signals in the healthy rat brain clearly visualize glutamate distributions. These findings may yield a valuable database and insights for comparing glutamate signal changes in pre-clinical brain diseases.
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Affiliation(s)
- Do-Wan Lee
- Department of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea; (D.-W.L.); (J.K.K.); (K.W.K.)
| | - Chul-Woong Woo
- Convergence Medicine Research Center, Asan Institute for Life Sciences, Asan Medical Center, Seoul 05505, Korea; (C.-W.W.); (D.-C.W.)
| | - Dong-Cheol Woo
- Convergence Medicine Research Center, Asan Institute for Life Sciences, Asan Medical Center, Seoul 05505, Korea; (C.-W.W.); (D.-C.W.)
- Department of Convergence Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea
| | - Jeong Kon Kim
- Department of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea; (D.-W.L.); (J.K.K.); (K.W.K.)
| | - Kyung Won Kim
- Department of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea; (D.-W.L.); (J.K.K.); (K.W.K.)
| | - Dong-Hoon Lee
- Department of Radiation Convergence Engineering, Yonsei University, Wonju 26493, Korea
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Dubost E, McErlain H, Babin V, Sutherland A, Cailly T. Recent Advances in Synthetic Methods for Radioiodination. J Org Chem 2020; 85:8300-8310. [PMID: 32369696 DOI: 10.1021/acs.joc.0c00644] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Organic compounds bearing radioisotopes of iodine are widely used for biological research, diagnostic imaging, and radiotherapy. Early reported synthetic methods for the incorporation of radioiodine have generally involved high temperature reactions or strongly oxidizing conditions. To overcome these limitations and to cope with the demand for novel radioiodinated probes, there has been a surge in the development of new synthetic methodology for radioiodination. This synopsis describes the key transformations developed recently.
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Affiliation(s)
- Emmanuelle Dubost
- Normandie Univ, UNICAEN, Centre d'Etudes et de Recherche sur le Médicament de Normandie (CERMN), 14000 Caen, France
| | - Holly McErlain
- WestCHEM, School of Chemistry, The Joseph Black Building, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - Victor Babin
- Normandie Univ, UNICAEN, Centre d'Etudes et de Recherche sur le Médicament de Normandie (CERMN), 14000 Caen, France
| | - Andrew Sutherland
- WestCHEM, School of Chemistry, The Joseph Black Building, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - Thomas Cailly
- Normandie Univ, UNICAEN, Centre d'Etudes et de Recherche sur le Médicament de Normandie (CERMN), 14000 Caen, France.,Normandie Univ, UNICAEN, IMOGERE, 14000 Caen, France.,Department of Nuclear Medicine, CHU Côte de Nacre, 14000 Caen, France
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Sah BR, Sommerauer M, Mu L, Gonzalez GP, Geistlich S, Treyer V, Schibli R, Buck A, Warnock G, Ametamey SM. Radiation dosimetry of [ 18F]-PSS232-a PET radioligand for imaging mGlu5 receptors in humans. EJNMMI Res 2019; 9:56. [PMID: 31240594 PMCID: PMC6593000 DOI: 10.1186/s13550-019-0522-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 05/28/2019] [Indexed: 11/25/2022] Open
Abstract
Purpose (E)-3-(pyridin-2-ylethynyl)cyclohex-2-enone O-(3-(2-[18F]-fluoroethoxy)propyl) oxime ([18F]-PSS232) is a new PET tracer for imaging of metabotropic glutamate receptor subtype 5 (mGlu5), and has shown promising results in rodents and humans. The aim of this study was to estimate the radiation dosimetry and biodistribution in humans, to assess dose-limiting organs, and to demonstrate safety and tolerability of [18F]-PSS232 in healthy volunteers. Methods PET/CT scans of six healthy male volunteers (mean age 23.5 ± 1.7; 21–26 years) were obtained after intravenous administration of 243 ± 3 MBq of [18F]-PSS232. Serial whole-body (vertex to mid-thigh) PET scans were assessed at ten time points, up to 90 min after tracer injection. Calculation of tracer kinetics and cumulated organ activities were performed using PMOD 3.7 software. Dosimetry estimates were calculated using the OLINDA/EXM software. Results Injection of [18F]-PSS232 was safe and well tolerated. Organs with highest absorbed doses were the gallbladder wall (0.2295 mGy/MBq), liver (0.0547 mGy/MBq), and the small intestine (0.0643 mGy/MBq). Mean effective dose was 3.72 ± 0.12 mSv/volunteer (range 3.61–3.96 mSv; 0.0153 mSv/MBq). Conclusion [18F]-PSS232, a novel [18F]-labeled mGlu5 tracer, showed favorable dosimetry values. Additionally, the tracer was safe and well tolerated.
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Affiliation(s)
- Bert-Ram Sah
- Department of Nuclear Medicine, University Hospital Zurich and University of Zurich, Zurich, Switzerland.,Department of Diagnostic, Interventional, and Pediatric Radiology, Inselspital, University of Bern, Bern, Switzerland
| | - Michael Sommerauer
- Department of Nuclear Medicine, University Hospital Zurich and University of Zurich, Zurich, Switzerland.,Department of Neurology, University Hospital Zurich and University of Zurich, Zurich, Switzerland
| | - Linjing Mu
- Department of Nuclear Medicine, University Hospital Zurich and University of Zurich, Zurich, Switzerland
| | - Gloria Pla Gonzalez
- Radiopharmaceutical Science, Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, ETH Zurich, Zurich, Switzerland
| | - Susanne Geistlich
- Radiopharmaceutical Science, Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, ETH Zurich, Zurich, Switzerland
| | - Valerie Treyer
- Department of Nuclear Medicine, University Hospital Zurich and University of Zurich, Zurich, Switzerland
| | - Roger Schibli
- Radiopharmaceutical Science, Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, ETH Zurich, Zurich, Switzerland
| | - Alfred Buck
- Department of Nuclear Medicine, University Hospital Zurich and University of Zurich, Zurich, Switzerland
| | - Geoffrey Warnock
- Department of Nuclear Medicine, University Hospital Zurich and University of Zurich, Zurich, Switzerland. .,PMOD Technologies LLC, Zurich, Switzerland.
| | - Simon M Ametamey
- Radiopharmaceutical Science, Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, ETH Zurich, Zurich, Switzerland
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8
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Wilson TC, Cailly T, Gouverneur V. Boron reagents for divergent radiochemistry. Chem Soc Rev 2018; 47:6990-7005. [DOI: 10.1039/c8cs00499d] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
This review discusses boron reagents as precursors for divergent radiolabelling with a focus on carbon-11, fluorine-18 and iodine-123, -125, -131.
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Affiliation(s)
| | - Thomas Cailly
- Normandie Univ
- UNICAEN
- Centre d’Etudes et de Recherche sur le Médicament de Normandie (CERMN)
- 14000 Caen
- France
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9
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Wilson TC, McSweeney G, Preshlock S, Verhoog S, Tredwell M, Cailly T, Gouverneur V. Radiosynthesis of SPECT tracers via a copper mediated 123I iodination of (hetero)aryl boron reagents. Chem Commun (Camb) 2016; 52:13277-13280. [PMID: 27775106 DOI: 10.1039/c6cc07417k] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2024]
Abstract
A general method for the copper mediated nucleophilic 123I-iodination of (hetero)aryl boronic esters and acids has been developed. The broad substrate scope of this radiosynthetic approach allows access to [123I]DPA-713, [123I]IMPY, [123I]MIBG and [123I]IPEB that are four commonly used SPECT radiotracers. Our results infer that aryl boronic reagents can now be employed as common precursors for both fluorine-18 and iodine-123 radiolabelling.
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Affiliation(s)
- Thomas C Wilson
- Chemistry Research Laboratory, Department of Chemistry, Oxford University, OX1 3TA, UK.
| | - Greg McSweeney
- Chemistry Research Laboratory, Department of Chemistry, Oxford University, OX1 3TA, UK.
| | - Sean Preshlock
- Chemistry Research Laboratory, Department of Chemistry, Oxford University, OX1 3TA, UK.
| | - Stefan Verhoog
- Chemistry Research Laboratory, Department of Chemistry, Oxford University, OX1 3TA, UK.
| | - Matthew Tredwell
- Chemistry Research Laboratory, Department of Chemistry, Oxford University, OX1 3TA, UK. and Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Thomas Cailly
- Chemistry Research Laboratory, Department of Chemistry, Oxford University, OX1 3TA, UK. and Normandie University, UNICAEN, CERMN, F-14032 Caen, France
| | - Véronique Gouverneur
- Chemistry Research Laboratory, Department of Chemistry, Oxford University, OX1 3TA, UK.
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Jeon J, Shim HE, Mushtaq S, Choi MH, Park SH, Choi DS, Jang BS. An Optimized Protocol for the Efficient Radiolabeling of Gold Nanoparticles by Using a 125I-labeled Azide Prosthetic Group. J Vis Exp 2016. [PMID: 27768051 DOI: 10.3791/54759] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Here, we demonstrate a detailed protocol for the radiosynthesis of a 125I-labeled azide prosthetic group and its application to the efficient radiolabeling of DBCO-group-functionalized gold nanoparticles using a copper-free click reaction. Radioiodination of the stannylated precursor (2) was carried out by using [125I]NaI and chloramine T as an oxidant at room temperature for 15 min. After HPLC purification of the crude product, the purified 125I-labeled azide (1) was obtained with high radiochemical yield (75 ± 10%, n = 8) and excellent radiochemical purity (>99%). For the synthesis of radiolabeled 13-nm-sized gold nanoparticles, the DBCO-functionalized gold nanoparticles (3) were prepared by using a thiolated polyethylene glycol polymer. A copper-free click reaction between 1 and 3 gave the 125I-labeled gold nanoparticles (4) with more than 95% of radiochemical yield as determined by radio-thin-layer chromatography (radio-TLC). These results clearly indicate that the present radiolabeling method using a strain-promoted copper-free click reaction will be useful for the efficient and convenient radiolabeling of DBCO-group-containing nanomaterials.
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Affiliation(s)
- Jongho Jeon
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute; Department of Radiation Biotechnology and Applied Radioisotope Science, University of Science and Technology;
| | - Ha Eun Shim
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute
| | - Sajid Mushtaq
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute; Department of Radiation Biotechnology and Applied Radioisotope Science, University of Science and Technology
| | - Mi Hee Choi
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute
| | - Sang Hyun Park
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute; Department of Radiation Biotechnology and Applied Radioisotope Science, University of Science and Technology
| | - Dae Seong Choi
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute
| | - Beom-Su Jang
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute; Department of Radiation Biotechnology and Applied Radioisotope Science, University of Science and Technology;
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Choi MH, Shim HE, Yun SJ, Kim HR, Mushtaq S, Lee CH, Park SH, Choi DS, Lee DE, Byun EB, Jang BS, Jeon J. Highly efficient method for 125I-radiolabeling of biomolecules using inverse-electron-demand Diels-Alder reaction. Bioorg Med Chem 2016; 24:2589-2594. [PMID: 27134118 DOI: 10.1016/j.bmc.2016.04.029] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 04/13/2016] [Accepted: 04/16/2016] [Indexed: 12/28/2022]
Abstract
In this report, we present a rapid and highly efficient method for radioactive iodine labeling of trans-cyclooctene group conjugated biomolecules using inverse-electron-demand Diels-Alder reaction. Radioiodination reaction of the tetrazine structure was carried out using the stannylated precursor 2 to give 125I-labeled product ([125I]1) with high radiochemical yield (65±8%) and radiochemical purity (>99%). For radiolabeling application of [125I]1, trans-cyclooctene derived cRGD peptide and human serum albumin were prepared. These substrates were reacted with [125I]1 under mild condition to provide the radiolabeled products [125I]6 and [125I]8, respectively, with excellent radiochemical yields. The biodistribution study of [125I]8 in normal ICR mice showed significantly lower thyroid uptake values than that of 125I-labeled human serum albumin prepared by a traditional radiolabeling method. Therefore [125I]8 will be a useful radiolabeled tracer in various molecular imaging and biological studies. Those results clearly demonstrate that [125I]1 will be used as a valuable prosthetic group for radiolabeling of biomolecules.
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Affiliation(s)
- Mi Hee Choi
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup, Jeonbuk 56212, Republic of Korea
| | - Ha Eun Shim
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup, Jeonbuk 56212, Republic of Korea
| | - Seong-Jae Yun
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup, Jeonbuk 56212, Republic of Korea
| | - Hye Rim Kim
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup, Jeonbuk 56212, Republic of Korea
| | - Sajid Mushtaq
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup, Jeonbuk 56212, Republic of Korea; Department of Radiation Biotechnology and Applied Radioisotope Science, Korea University of Science and Technology, Deajeon 34113, Republic of Korea
| | - Chang Heon Lee
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup, Jeonbuk 56212, Republic of Korea
| | - Sang Hyun Park
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup, Jeonbuk 56212, Republic of Korea; Department of Radiation Biotechnology and Applied Radioisotope Science, Korea University of Science and Technology, Deajeon 34113, Republic of Korea
| | - Dae Seong Choi
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup, Jeonbuk 56212, Republic of Korea
| | - Dong-Eun Lee
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup, Jeonbuk 56212, Republic of Korea
| | - Eui-Baek Byun
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup, Jeonbuk 56212, Republic of Korea; Department of Radiation Biotechnology and Applied Radioisotope Science, Korea University of Science and Technology, Deajeon 34113, Republic of Korea
| | - Beom-Su Jang
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup, Jeonbuk 56212, Republic of Korea; Department of Radiation Biotechnology and Applied Radioisotope Science, Korea University of Science and Technology, Deajeon 34113, Republic of Korea.
| | - Jongho Jeon
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup, Jeonbuk 56212, Republic of Korea; Department of Radiation Biotechnology and Applied Radioisotope Science, Korea University of Science and Technology, Deajeon 34113, Republic of Korea.
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Metabotropic glutamate receptor 5 – a promising target in drug development and neuroimaging. Eur J Nucl Med Mol Imaging 2016; 43:1151-70. [DOI: 10.1007/s00259-015-3301-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2015] [Accepted: 12/22/2015] [Indexed: 10/22/2022]
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13
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Jeon J, Kang JA, Shim HE, Nam YR, Yoon S, Kim HR, Lee DE, Park SH. Efficient method for iodine radioisotope labeling of cyclooctyne-containing molecules using strain-promoted copper-free click reaction. Bioorg Med Chem 2015; 23:3303-8. [DOI: 10.1016/j.bmc.2015.04.045] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2015] [Revised: 04/16/2015] [Accepted: 04/17/2015] [Indexed: 01/08/2023]
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Poutiainen P, Kil KE, Zhang Z, Kuruppu D, Tannous B, Brownell AL. Co-operative binding assay for the characterization of mGlu4 allosteric modulators. Neuropharmacology 2015; 97:142-8. [PMID: 26025660 DOI: 10.1016/j.neuropharm.2015.05.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Revised: 05/06/2015] [Accepted: 05/11/2015] [Indexed: 11/25/2022]
Abstract
The interest in the role of metabotropic glutamate receptor 4 (mGlu4) in CNS related disorders has increased the need for methods to investigate the binding of allosteric drug candidates. Our aim is to present the first fully characterized in vitro binding assay of mGlu4 positive allosteric modulators (PAMs). Results suggest that mGlu4 PAMs have characteristic co-operative binding with orthosteric glutamate, which offers a notable insight to the further development of mGlu4 targeted therapies.
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Affiliation(s)
- Pekka Poutiainen
- Athinoula A. Martinos Biomedical Imaging Center, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Kun-Eek Kil
- Athinoula A. Martinos Biomedical Imaging Center, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Zhaoda Zhang
- Athinoula A. Martinos Biomedical Imaging Center, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Darshini Kuruppu
- Division of Surgical Oncology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Bakhos Tannous
- Experimental Therapeutics and Molecular Imaging Laboratory, Neuroscience Center, Department of Neurology, Massachusetts General Hospital, Boston, MA, USA; Program in Neuroscience, Harvard Medical School, Boston, MA, USA
| | - Anna-Liisa Brownell
- Athinoula A. Martinos Biomedical Imaging Center, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.
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