PS-341 Followed by Removal of Prostate for Those With Prostate Cancer

PS-341 is a dipeptidyl boronic acid inhibitor with high specificity for the proteasome developed by Millennium Pharmaceuticals Inc. to treat human malignancies. It is the first member of this class of anti-tumor agents to come to human trials. Patients will receive PS-341 (1.6mg/m2/dose) by intravenous push weekly for 4 consecutive weeks followed by a 24-72 hour rest. This schedule consists of one treatment cycle. Upon the completion of 4 weeks of PS-341 followed by a 24-72 hour rest period, radical prostatectomy will be performed.