Study of Bevacizumab and Erlotinib for Patients With Hormone Refractory Prostate Cancer

In this Phase I/Phase II study, the primary objectives are to establish the maximum tolerated dose of docetaxel, erlotinib, bevacizumab, and prednisone in patients with metastatic hormone refractory prostate cancer and to determine the efficacy of this regimen for treatment of metastatic HRPC. In the phase I portion of the study, eligible patients will be enrolled and treated using a "3+3" design. Docetaxel will be started at 55 mg/m2 every cycle (21 days) and dose escalated by 10 mg/m2 at each cohort level. The dose of bevacizumab will be held constant at 15 mg/kg every 3 weeks and erlotinib will be provided at 200 mg PO daily from days 216 as described in previous safety studies. All patients will receive prednisone 5 mg PO bid. Eighteen patients will be treated in the phase I portion. The phase II dose for this combined treatment will be defined as either the highest dosage cohort in which 6 patients are treated and there are less than 3 dose limiting toxicities (DLTs); or the combination of docetaxel, erlotinib, and bevacizumab at the cohort 3 dose level, whichever is the lower dose. Another 37 patients will be enrolled for the phase II study. All patients will receive the phase II recommended dose as determined by the phase I portion of the study.