Mitoxantrone, Prednisone Plus Sorafenib in Taxane-Refractory Metastatic Hormone Refractory Prostate Cancer (HRPC)

Accelerated Community Oncology Research Network

Status and phase

Terminated

Phase 2

Conditions

Metastatic Prostate Cancer

Treatments

Drug: Prednisone

Drug: Sorafenib

Drug: Mitoxantrone

Study type

Interventional

Funder types

Other

Industry

Identifiers

NCT00452387

ACORN AVAHRPC0607

Details and patient eligibility

About

The purpose of this research study is to determine if the combination of mitoxantrone, prednisone and sorafenib will improve the time to progression of advanced stage metastatic hormone-refractory prostate cancer.

Full description

The primary objective of this study is to test the hypothesis that the combination of Mitoxantrone, Prednisone and Sorafenib in taxane-refractory patients with metastatic hormone refractory prostate cancer (mHRPC) will result in an improvement of the median time to progression (TTP). Since the median (i.e 50% of patients) TTP for Mitoxantrone/Prednisone is 3 months, our hypothesis is that 70% will have not progressed at 3 months with this investigational combination. Progression will be assessed by radiologic imaging criteria.

The early stopping point is 21 subjects. If 10 or fewer subjects with tumor favorable response are observed when 21 subjects are accrued then the null hypothesis is accepted and the trial is terminated. If 16 or more subjects with tumor favorable response are observed when 21 subjects are accrued then the alternative hypothesis is accepted and the trial is terminated. The probability of early stopping under the null is 0.51, and under the alternative is 0.39. If the trial progresses until 42 subjects are evaluated and 24 or more subjects with favorable response are observed then the null hypothesis is rejected. This design minimizes the average sample number under the null, which is 31.2.

Enrollment

22 patients

Sex

Male

Ages

18+ years old

Volunteers

No Healthy Volunteers

Inclusion criteria

Voluntary written informed consent
Histopathologic diagnosis of prostatic adenocarcinoma with evidence of progression despite adequate castration (testosterone < 50 ng/dL)
Progressive disease after taxane-based chemotherapy (docetaxel or paclitaxel, single agent or combination regimens, weekly or every 21 day schedules)
Patients who discontinued taxane- based chemotherapy because of toxicity will be eligible as long as there is evidence of progressive disease
Minimum of 4 weeks period from last chemotherapy infusion to registration (this does not apply to steroid use which is permitted). Estramustine needs to be discontinued at least 6 weeks prior to first day of treatment on protocol
A minimum of 4 weeks off bicalutamide, nilutamide, megestrol acetate ketoconazole, diethylstilbestrol (DES). Minimum of 2 weeks off flutamide
Reductase inhibitors will be allowed if initiated at least 2 months prior to registration
No concurrent investigational therapy
Complementary and Alternative Medicine (CAM) products will be permitted as long as patients have been receiving them for at least 2 months. Initiation of new CAM products while on protocol will be discouraged.
Ongoing androgen deprivation therapy (orchiectomy, gonadotropin-releasing hormone (GnRH) agonist or antagonist)
Adequate bone marrow, liver and renal function as assessed by the following:
- Hemoglobin ≥ 9.0 g/dl
- Absolute neutrophil count (ANC) ≥ 1,500/mm3
- Platelet count ≥ 100,000/mm3
- Total bilirubin ≤ 1.5 times upper limit of normal (ULN)
- ALT and AST ≤ 2.5 times the ULN ( ≤ 5 x ULN for patients with liver involvement)
- Creatinine ≤ 1.5 times the ULN
International normalized ratio (INR) < 1.5 or a Prothrombin (PT)/Partial thromboplastin time (PTT) within normal limits. Patients receiving anti-coagulation treatment with an agent such as warfarin or heparin may be allowed to participate. For patients on warfarin, the INR should be measured prior to initiation of sorafenib and monitored at least weekly, or as defined by the local standard of care, until INR is stable.
ECOG performance status ≤ 2
Baseline left ventricular ejection fraction (LVEF) ≥ 50%
Life expectancy ≥ 3 months
Patients must agree to use adequate contraception prior to study entry, during the study and for at least three months after the last administration of sorafenib

Exclusion criteria

More than one line of prior cytotoxic chemotherapy in the metastatic setting, previous adjuvant chemotherapy will be allowed
No active malignancy other than prostate cancer (except non-melanoma skin cancer) within 5 years of enrollment
Known brain metastases
Cardiac disease: Congestive heart failure > class II New York Heart Association (NYHA). Patients must not have unstable angina or new onset angina (began within the last 3 months) or myocardial infarction within the past 6 months
Cardiac ventricular arrhythmias requiring anti-arrhythmic therapy
Uncontrolled hypertension
Active clinically serious infection > Common Terminology Criteria for Adverse Events (CTCAE) Grade 2
Thrombolic or embolic events such as a cerebrovascular accident including transient ischemic attacks within the past 6 months
Pulmonary hemorrhage/bleeding event ≥ CTCAE Grade 2 within 4 weeks of first dose of study drug
Any other hemorrhage/bleeding event ≥ CTCAE Grade 3 within 4 weeks of first dose of study drug
Poorly controlled hyperglycemia
Treatment with radiotherapy within 4 weeks or treatment with radiopharmaceuticals within past 8 weeks
Patient has received other investigational drugs within 14 days before enrollment
Serious medical or psychiatric illness likely to interfere with participation in this clinical study
Serious non-healing wound or ulcer
Evidence or history of bleeding diathesis or coagulopathy
Use of St. John's Wort or rifampin
Known or suspected allergy to sorafenib or any agent given in the course of this trial
Any condition that impairs patient's ability to swallow whole pills
Any malabsorption problem