Study of ATN-224 in Patients With Prostate Cancer

Inclusion Criteria * Patients with histologically confirmed, localized prostate cancer who have a prostate-specific antigen (PSA) doubling time (DT) as calculated according to the Memorial Sloan-Kettering Cancer Center nomogram (http://www.mskcc.org/mskcc/html/10088.cfm) * Doubling time \< 12 months after local therapy in patients who have not had any previous hormone therapy, or * Doubling time \< 12 months starting at least 6 months after their last dose of hormone therapy * Patients must have a serum testosterone \>150 ng/dL at the time of study entry. Patients may have received previous castrating hormonal therapy or anti-androgens, provided that the testosterone level is \>150 ng/dL at the time of study entry. Prior chemotherapy is also allowed as long as the requirements for adequate organ and marrow function are met. * No detectable disease as assessed by physical examination and bone and CT (abdomen and pelvis) scans within 4 weeks prior to the first dose of ATN-224 * A minimum of three PSA values, each at least 4 weeks apart, to calculate PSA-DT. The last PSA level prior to enrollment must be at least 2.0 ng/mL and be rising over the prior value. * Age ≥18 years * Life expectancy of greater than 6 months * Eastern Cooperative Oncology Group (ECOG) performance status ≤2 (Karnofsky ≥50%; see Appendix A) * Patients must have adequate organ and marrow function as defined below: * absolute neutrophil count ≥1,500/uL * platelets ≥100,000/uL * hemoglobin ≥9 g/dL * total bilirubin ≤2 X institutional upper limit of normal (ULN) * AST(SGOT) and ALT(SGPT) ≤2 X ULN * creatinine clearance (measured or calculated) ≥30 mL/min * serum testosterone \>150 ng/mL or return to pre-treatment values for patients who received hormone therapy Patients are allowed to receive erythropoietin or blood transfusions before receiving their first dose of ATN-224 to bring the hemoglobin level to \>9 g/dL to meet eligibility criteria. * At least 28 days from receiving any investigational agent * The effects of ATN-224 on sperm at the recommended therapeutic dose are unknown. For this reason men with partners of child-bearing potential must agree to use adequate contraception (hormonal and/or barrier method of birth control; abstinence) prior to study entry and for the duration of study participation through the follow up visit 28 days after the last dose of ATN-224 * Willingness to forgo taking copper- or zinc-containing vitamins or supplements * Ability to understand and the willingness to sign a written informed consent document Exclusion Criteria * Patients who have had radiotherapy within 3 months prior to the first dose of ATN 224 * Patients may not be receiving any other investigational agents * History of allergic reactions attributed to compounds of similar chemical or biologic composition to ATN-224 or omeprazole or other long acting antacids * History of malabsorption syndromes or other gastrointestinal disorders that may affect ATN-224 absorption, including bowel obstruction, celiac disease, sprue, cystic fibrosis * Ineligible to receive either omeprazole (Prilosec®), lansoprazole (Prevacid®), pantoprazole (Protonix®), or ranitidine (Zantac®) * Inability to swallow study medication capsules * Other serious medical or psychiatric illness preventing informed consent or with the potential to interfere with assessment of safety or efficacy of ATN-224 treatment * Uncontrolled intercurrent illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements * Patients known to be positive for HIV or infectious hepatitis type A, B or C * No other prior malignancy is allowed except for the following: adequately treated basal cell or squamous cell skin cancer or any other cancer from which the patient has been disease-free for 5 years * Patients receiving steroid therapy for concurrent illness unless they have been on a stable dose for 3 months. * Patients receiving hormonal therapy including gonadotropin-releasing hormone agonist/antagonist, antiandrogens, diethylstilbestrol, any other estrogen-like agents, any hormonally active over-the-counter compounds such as PC-SPES or finasteride