Three new magnetic resonance imaging probes that target glutamine transporters have been synthesized. They consist of a Gd-DOTAmonoamide moiety (DOTA=1,4,7,10- tetraazacyclododecane-1,4,7,10-tetraacetic acid) linked through a six carbon atom chain to a vector represented by a glutamine residue bound through acarboxylic, g-carboxamidic, or a-amino functionalities. Their uptake by HTC (rat hepatocarcinoma) and healthy rat hepatocytes has shown that the system containing the glutamine vector bound through the a-carboxylic group displays a markedly higher affinity for tumor cells. The observed behavior is rationalized in terms of the exploitation of an additional glutamine transporter active in hepatic tumor cells.
Tuning glutamine binding modes in Gd-DOTA-based probes for an improved MRI visualization of tumor cells
STEFANIA, Rachele;BARGE, Alessandro;GENINATTI CRICH, Simonetta;CRAVOTTO, Giancarlo;AIME, Silvio
2009-01-01
Abstract
Three new magnetic resonance imaging probes that target glutamine transporters have been synthesized. They consist of a Gd-DOTAmonoamide moiety (DOTA=1,4,7,10- tetraazacyclododecane-1,4,7,10-tetraacetic acid) linked through a six carbon atom chain to a vector represented by a glutamine residue bound through acarboxylic, g-carboxamidic, or a-amino functionalities. Their uptake by HTC (rat hepatocarcinoma) and healthy rat hepatocytes has shown that the system containing the glutamine vector bound through the a-carboxylic group displays a markedly higher affinity for tumor cells. The observed behavior is rationalized in terms of the exploitation of an additional glutamine transporter active in hepatic tumor cells.File | Dimensione | Formato | |
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