PT - JOURNAL ARTICLE AU - CAMILLA THELLENBERG-KARLSSON AU - CLAES NYMAN AU - STEN NILSSON AU - RENÉ BLOM AU - MARCELA MÁRQUEZ AU - ENRIQUE CASTELLANOS AU - ANDERS R. HOLMBERG TI - Bone-targeted Novel Cytotoxic Polybisphosphonate Conjugate in Castration-resistant Prostate Cancer: A Multicenter Phase 1 Study DP - 2016 Dec 01 TA - Anticancer Research PG - 6499--6504 VI - 36 IP - 12 4099 - http://ar.iiarjournals.org/content/36/12/6499.short 4100 - http://ar.iiarjournals.org/content/36/12/6499.full SO - Anticancer Res2016 Dec 01; 36 AB - Background: Osteodex (ODX) is a cytotoxic bone-targeting polybisphosphonate, intended for treatment of bone metastasis from castration-resistant prostate cancer (CRPC). The primary objective of this study was to describe the tolerability and toxicity of such treatment by defining its maximum tolerated dose (MTD) and dose-limiting toxicity (DLT). Patients and Methods: Twenty-eight patients with castration-resistant prostate cancer and confirmed bone metastasis were assigned to seven infusions of ODX every third week, divided in seven ascending dose cohorts. Results: No DLT's were observed and as pre-specified, the highest dose administered was defined as MTD. In total, 206 adverse events (AE) were recorded and 13,6% were classified as treatment-related, while none were serious or severe (SAE). No cumulative toxicity and no renal toxicity were recorded. Conclusion: ODX was well tolerated, with few and mild side-effects and with apparent treatment efficacy in the highest dose cohort. Further clinical development is currently in progress.