Abstract
The overall purpose of this study was to determine the potential usefulness of 1,19-di-(ethylamino)-5,10,15-triazononadecane (BE-4-4-4-4) in the treatment of prostate cancer using in vitro and in vivo models. More specifically the objectives were: (1) to determine the in vitro and in vivo sensitivity of human and rat prostate cancer cells to two polyamine analogues N1,N11-di(ethyl)norspermine (DENSPM) and BE-4-4-4-4; (2) to determine whether the mechanism of cell kill occurred through an apoptotic pathway; and (3) to determine the toxicity associated with therapeutic doses of BE-4-4-4-4 using an animal model. In order to determine the ability of these drugs to cause in vitro cytotoxicity, colony-forming assays were performed utilizing the well-characterized Dunning rat prostate cancer cell lines AT3.1, AT6.1 and AT6.3, and the androgen-insensitive human prostate cancer cell lines DU145, DuPro-1 and TSU-Pr1. Apoptotic cell death was determined using DNA laddering and DAPI staining of nuclei. The antitumor activity of BE-4-4-4-4 was evaluated by treatment of DuPro- and PC-3 xenograft tumors in nude mice. BE-4-4-4-4 was shown to be approximately 4 to 86 times more cytotoxic in clonogenic assays than DENSPM in both rat and human pr...Continue Reading
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