Synthesis of Conjugated Spermine Derivatives with 7-nitrobenzoxadiazole (NBD), Rhodamine and Bodipy As New Fluorescent Probes for the Polyamine Transport System
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The synthesis of a series of conjugated spermine derivatives with benzoxadiazole, phenylxanthene or bodipy fluorophores is described. These fluorescent probes were used to identify the activity of the polyamine transport system (PTS). N(1)-Methylspermine NBD conjugate 5 proved to have the optimal fluorescence characteristics and was used to show a selectivity for PTS-proficient CHO versus PTS-deficient CHO-MG cells. It can therefore be used as a tool for the selection of cells sensitive to cytotoxic compounds vectored through the PTS.
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