A 12 Week, Open Label, Phase I/IIa Study Using Apatone(®) for the Treatment of Prostate Cancer Patients Who Have Failed Standard Therapy

Purpose: To evaluate the safety and efficacy of oral Apatone(®) (Vitamin C and Vitamin K(3)) administration in the treatment of prostate cancer in patients who failed standard therapy. Materials and Methods: Seventeen patients with 2 successive rises in PSA after failure of standard local therapy were treated with (5,000 mg of VC and 50 mg of VK(3) each day) for a period of 12 weeks. Prostate Specific Antigen (PSA) levels, PSA velocity (PSAV) and PSA doubling times (PSADT) were calculated before and during treatment at 6 week intervals. Following the initial 12 week trial, 15 of 17 patients opted to continue treatment for an additional period ranging from 6 to 24 months. PSA values were followed for these patients. Results: At the conclusion of the 12 week treatment period, PSAV decreased and PSADT increased in 13 of 17 patients (p ≤ 0.05). There were no dose-limiting adverse effects. Of the 15 patients who continued on Apatone after 12 weeks, only 1 death occurred after 14 months of treatment. Conclusion: Apatone showed promise in delaying biochemical progression in this group of end stage prostate cancer patients.