Radiolabeled 5-Iodo-3′-<i>O</i>-(17β-succinyl-5α-androstan-3-one)-2′-deoxyuridine and Its 5′-Monophosphate for Imaging and Therapy of Androgen Receptor-Positive Cancers: Synthesis and Biological Evaluation
作者:Zbigniew P. Kortylewicz、Jessica Nearman、Janina Baranowska-Kortylewicz
DOI:10.1021/jm9005803
日期:2009.8.27
High levels of androgen receptor (AR) are often indicative of recurrent, advanced, or metastatic cancers. These conditions are also characterized by a high proliferative fraction. 5-Radioiodo-3'-O-(17 beta-succinyl-5 alpha-androstan-3-one)-2'-deoxyuridine 8 and 5-radioiodo-3'-O-(17 beta-succinyl-5 alpha-androstan-3-one)-2'-deoxyuridin-5'-yl monophosphate 13 target AR. They are also degraded intracellularly to 5-radioiodo-2'-deoxyuridine 1 and its monophosphate 20. respectively, which can participate in the DNA synthesis. Both drugs were prepared at the no-carrier-added level. Precursors and methods are readily adaptable to radiolabeling with various radiohalides suitable for SPECT and PET imaging, its well as endoradiotherapy, In vitro and in vivo studies confirm the AR-dependent interactions. Both drugs bind to sex hormone binding globulin. This binding significantly improves their stability in serum. Biodistribution and imaging studies show preferential uptake and retention of 8 and 13 in ip xenografts of human ovarian adenocarcinoma cells NIH:OVCAR-3, which over express A R. When these drugs are administered at therapeutic dose levels, a significant tumor growth arrest is observed.
Cancer specific radiolabeled conjugates regulated by the cell cycle for the treatment and diagnosis of cancer
申请人:Baranowska-Kortylewicz Janina
公开号:US20050069495A1
公开(公告)日:2005-03-31
Radiolabeled conjugates are disclosed which have a component that is effective to target tumor cells, which cells selectively take up and degrade the conjugate, thereby delivering to the tumor cell nucleus a radioisotope capable of being incorporated into the nuclear material, so as to produce a cytotoxic effect and/or to render the cell detectable by radioimaging.