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The synthesis of a (99m)Tc-labeled tetravalent targeting probe upon isonitrile coordination to (99m)Tc(I) for enhanced target uptake in saturable systems

The presence of excess unlabeled ligands in the injectate hinders the target uptake of (99m)Tc-labeled targeting vectors. To address the issue, we previously developed a chemical design which provides a (99m)Tc-labeled trivalent RGD probe upon CN-βAla-Gly-Gly-c(RGDfK) (L(β)) coordination to [(99m)Tc...

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Autores principales: Mizuno, Yuki, Uehara, Tomoya, Jen, Chun-wei, Akizawa, Hiromichi, Arano, Yasushi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9070385/
https://www.ncbi.nlm.nih.gov/pubmed/35531015
http://dx.doi.org/10.1039/c9ra04311j
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author Mizuno, Yuki
Uehara, Tomoya
Jen, Chun-wei
Akizawa, Hiromichi
Arano, Yasushi
author_facet Mizuno, Yuki
Uehara, Tomoya
Jen, Chun-wei
Akizawa, Hiromichi
Arano, Yasushi
author_sort Mizuno, Yuki
collection PubMed
description The presence of excess unlabeled ligands in the injectate hinders the target uptake of (99m)Tc-labeled targeting vectors. To address the issue, we previously developed a chemical design which provides a (99m)Tc-labeled trivalent RGD probe upon CN-βAla-Gly-Gly-c(RGDfK) (L(β)) coordination to [(99m)Tc][Tc(CO)(3)](+) core at pH 6.0. In this study, we extended our coordination mediated synthesis of the trivalent RGD probe to that of a tetravalent one. Our initial attempts reacting L(β) with [(99m)Tc][Tc(CO)(3)](+) core at pH 8.0 failed to provide [(99m)Tc][Tc(CO)(2)(L(β))(4)](+) due to the formation of multiple side products. A γ-aminobutylic acid (GABA) based isonitrile ligand CN-GABA-Gly-Gly-c(RGDfK) (L(G)), on the other hand, avoided the side reaction and selectively provided [(99m)Tc][Tc(CO)(2)(L(G))(4)](+) ((99m)Tc-[L(G)](4)) at pH 8.0. (99m)Tc-[L(G)](4) exhibited higher binding affinity to integrin α(v)β(3) than its unlabeled ligand, and visualized U87MG tumor without tedious post-labeling purification. These results indicate that the metal coordination-mediated syntheses of (99m)Tc-labeled multivalent probes have been successfully applied to a tetravalent one, which would allow a wider range of choices for designing novel (99m)Tc-labeled multivalent probes of high in vivo target uptake.
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spelling pubmed-90703852022-05-05 The synthesis of a (99m)Tc-labeled tetravalent targeting probe upon isonitrile coordination to (99m)Tc(I) for enhanced target uptake in saturable systems Mizuno, Yuki Uehara, Tomoya Jen, Chun-wei Akizawa, Hiromichi Arano, Yasushi RSC Adv Chemistry The presence of excess unlabeled ligands in the injectate hinders the target uptake of (99m)Tc-labeled targeting vectors. To address the issue, we previously developed a chemical design which provides a (99m)Tc-labeled trivalent RGD probe upon CN-βAla-Gly-Gly-c(RGDfK) (L(β)) coordination to [(99m)Tc][Tc(CO)(3)](+) core at pH 6.0. In this study, we extended our coordination mediated synthesis of the trivalent RGD probe to that of a tetravalent one. Our initial attempts reacting L(β) with [(99m)Tc][Tc(CO)(3)](+) core at pH 8.0 failed to provide [(99m)Tc][Tc(CO)(2)(L(β))(4)](+) due to the formation of multiple side products. A γ-aminobutylic acid (GABA) based isonitrile ligand CN-GABA-Gly-Gly-c(RGDfK) (L(G)), on the other hand, avoided the side reaction and selectively provided [(99m)Tc][Tc(CO)(2)(L(G))(4)](+) ((99m)Tc-[L(G)](4)) at pH 8.0. (99m)Tc-[L(G)](4) exhibited higher binding affinity to integrin α(v)β(3) than its unlabeled ligand, and visualized U87MG tumor without tedious post-labeling purification. These results indicate that the metal coordination-mediated syntheses of (99m)Tc-labeled multivalent probes have been successfully applied to a tetravalent one, which would allow a wider range of choices for designing novel (99m)Tc-labeled multivalent probes of high in vivo target uptake. The Royal Society of Chemistry 2019-08-21 /pmc/articles/PMC9070385/ /pubmed/35531015 http://dx.doi.org/10.1039/c9ra04311j Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Mizuno, Yuki
Uehara, Tomoya
Jen, Chun-wei
Akizawa, Hiromichi
Arano, Yasushi
The synthesis of a (99m)Tc-labeled tetravalent targeting probe upon isonitrile coordination to (99m)Tc(I) for enhanced target uptake in saturable systems
title The synthesis of a (99m)Tc-labeled tetravalent targeting probe upon isonitrile coordination to (99m)Tc(I) for enhanced target uptake in saturable systems
title_full The synthesis of a (99m)Tc-labeled tetravalent targeting probe upon isonitrile coordination to (99m)Tc(I) for enhanced target uptake in saturable systems
title_fullStr The synthesis of a (99m)Tc-labeled tetravalent targeting probe upon isonitrile coordination to (99m)Tc(I) for enhanced target uptake in saturable systems
title_full_unstemmed The synthesis of a (99m)Tc-labeled tetravalent targeting probe upon isonitrile coordination to (99m)Tc(I) for enhanced target uptake in saturable systems
title_short The synthesis of a (99m)Tc-labeled tetravalent targeting probe upon isonitrile coordination to (99m)Tc(I) for enhanced target uptake in saturable systems
title_sort synthesis of a (99m)tc-labeled tetravalent targeting probe upon isonitrile coordination to (99m)tc(i) for enhanced target uptake in saturable systems
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9070385/
https://www.ncbi.nlm.nih.gov/pubmed/35531015
http://dx.doi.org/10.1039/c9ra04311j
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