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- W1977066986 abstract "Four open chain tetraamine-functionalized bombesin (BB) analogues were synthesized [parent tetradecapeptide-based Demobesin 3 and 4 and BB(7-14)-based Demobesin 5 and 6]. Labeling with (99m)Tc afforded high-purity and high specific activity radiotracers. Peptides showed high affinity for the human GRP-R (GRP-R = gastrin releasing peptide receptor) expressed in PC-3 cells. In human tumors preferentially expressing single bombesin receptor subtypes, they showed high affinity for the GRP-R, less affinity for the NMB-R (NMB-R = neuromedin B receptor) and no affinity for the orphan BB(3)-R (bombesin subtype 3 receptor). [(99m)Tc]Demobesin 3-6 efficiently internalized in a time- and dose-dependent manner in PC-3 cells and showed a high and specific uptake in human PC-3 xenografts and the pancreas of nude mice. [(99m)Tc]Demobesin 3 and 4 were rapidly excreted via the kidneys while the truncated analogues were predominantly processed by the hepatobiliary system. Patient studies are scheduled for validating the suitability of [(99m)Tc]Demobesin 3 and 4 in the GRP-R-targeted imaging of tumors." @default.
- W1977066986 created "2016-06-24" @default.
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- W1977066986 date "2004-12-04" @default.
- W1977066986 modified "2023-10-03" @default.
- W1977066986 title "Potent Bombesin-like Peptides for GRP-Receptor Targeting of Tumors with <sup>99m</sup>Tc: A Preclinical Study" @default.
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- W1977066986 doi "https://doi.org/10.1021/jm049437y" @default.
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