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Glucosamine conjugates bearing N,N,O-donors: potential imaging agents utilizing the [M(CO)(3)](+) core (M = Re, Tc)

TitleGlucosamine conjugates bearing N,N,O-donors: potential imaging agents utilizing the [M(CO)(3)](+) core (M = Re, Tc)
Publication TypeJournal Article
Year of Publication2009
AuthorsBowen, ML, Lim, NC, Ewart, CB, Misri, R, Ferreira, CL, Hafeli, U, Adam, MJ, Orvig, C
JournalDalton Transactions
Pagination9216-9227
Type of ArticleArticle
ISBN Number1477-9226
KeywordsBIOMOLECULES, EXPRESSION, GLUT-1, HEXOKINASE, IN-VITRO, METAL-COMPLEXES, TC-99M, technetium, TRANSPORTERS, TRICARBONYL COMPLEXES
Abstract

The design rationale, synthesis and radiolabeling evaluation of four glucosamine conjugated ligands for the [Tc-99m(CO)(3)](+) core is described. The capability to bind the tricarbonyl core is initially demonstrated using the cold surrogate [Re(CO)(3)](+). The four compounds are competent chelates in binding [Tc-99m(CO)(3)](+) as labeling studies show, with yields ranging from 79 to 96% and the resulting complexes showing stability in the presence of competing chelates for 24 h at 37 degrees C. The rhenium complexes were tested for hexokinase-catalysed phosphorylation, and the technetium complexes were tested for GLUT-1 mediated cell uptake - they showed a small amount of uptake but it was not glucose dependent, suggesting that it was not via the GLUT-1 transporters.

URL<Go to ISI>://000270973800020