Evaluation and comparison of a new DOTA and DTPA-bombesin agonist in vitro and in vivo in low and high GRPR expressing prostate and breast tumor models
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2015
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Applied Radiation and Isotopes
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We evaluated and compared a new bombesin analog [Tyr–Gly5, Nle14]-BBN(6–14) conjugated to DOTA or
DTPA and radiolabeled with In-111 in low and high GRPR expressing tumor models. Both peptides were
radiolabeled with high radiochemical purity and specific activity. In vitro assays on T-47D, LNCaP and PC3 cells showed that the affinity of peptides is similar and a higher binding and internalization of DOTApeptide to PC-3 cells was observed. Both peptides could