Hormone Therapy and OGX-011 Before Radical Prostatectomy in Treating Patients With Prostate Cancer

RATIONALE: Androgens can stimulate the growth of prostate cancer cells. Drugs such as flutamide and buserelin may stop the adrenal glands from producing androgens. OGX-011 may help flutamide and buserelin kill more tumor cells by making tumor cells more sensitive to the drugs. Giving flutamide and buserelin with OGX-011 before surgery may shrink the tumor so it can be removed during surgery.

PURPOSE: Phase I trial to study the effectiveness of combining hormone therapy with OGX-011 before radical prostatectomy in treating patients who have prostate cancer.

OBJECTIVES:

* Determine the maximum tolerated dose and recommended phase II dose of OGX-011 (clusterin antisense oligonucleotide) when administered with neoadjuvant hormonal therapy before radical prostatectomy in patients with adenocarcinoma of the prostate.
* Determine the toxicity of this regimen in these patients.
* Determine the pharmacokinetics of OGX-011 when this regimen is administered in these patients..
* Assess the effects of this regimen on pathologic complete response rates in these patients.
* Correlate plasma and/or prostate concentrations of OGX-011 with patient response or toxicity measures.

OUTLINE: This is a dose-escalation study of OGX-011.

Patients receive OGX-011 IV over 2 hours on days 1, 3, 5, 8, 15, 22, and 29; oral flutamide three times daily for 4 weeks; and buserelin subcutaneously on day 1.

Cohorts of 3-6 patients (except for 1 patient at starting dose) receive escalating doses of OGX-011 until the maximum tolerated dose (MTD) is determined. The MTD is defined as the dose at which at least 2 of 3 or 2 of 6 patients experience dose-limiting toxicity. The recommended phase II dose is the dose preceding the MTD.

Patients undergo radical prostatectomy and bilateral pelvic lymphadenectomy 1 week after the last dose of neoadjuvant therapy.

Patients are followed at 7 days after surgery and then at 3 months.

PROJECTED ACCRUAL: Approximately 25-33 patients will be accrued for this study.

Eligibility Criteria:
DISEASE CHARACTERISTICS:

* Histologically confirmed adenocarcinoma of the prostate

  * High-risk, localized disease that is previously untreated
  * Minimum of 2 positive biopsies
  * Meets at least 1 of the following criteria:

    * Stage T3
    * Serum PSA greater than 10 ng/mL
    * Gleason score 7-10
    * Gleason score 6 and at least 3 positive biopsies
* Potential candidate for radical prostatectomy

PATIENT CHARACTERISTICS:

Age

* Over 18

Performance status

* ECOG 0-1

Life expectancy

* Not specified

Hematopoietic

* WBC at least 3,000/mm\^3
* Platelet count at least 100,000/mm\^3
* Hemoglobin at least 10.0 g/dL

Hepatic

* Bilirubin normal
* AST and ALT normal
* PTT normal
* INR normal

Renal

* Creatinine normal

Cardiovascular

* No significant cardiac dysfunction

Other

* Fertile patients must use effective contraception
* No known hypersensitivity to oligonucleotides, luteinizing hormone-releasing hormone analogs, or anti-androgens
* No evidence of active uncontrolled infection
* No other malignancy within the past 5 years except adequately treated nonmelanoma skin cancer
* No other serious illness, psychiatric disorder, or medical condition that would preclude study compliance
* No history of a significant neurological disorder that would preclude informed consent
* No geographical condition that would preclude study compliance

PRIOR CONCURRENT THERAPY:

Biologic therapy

* Not specified

Chemotherapy

* No prior chemotherapy for prostate cancer

Endocrine therapy

* No prior hormonal therapy for prostate cancer

Radiotherapy

* No prior radiotherapy for prostate cancer
* No concurrent radiotherapy

Surgery

* Not specified

Other

* No concurrent heparin or warfarin anticoagulation
* No other concurrent investigational therapy
* No other concurrent cytotoxic therapy