Gemcitabine and Docetaxel in Treating Patients With Metastatic Prostate Cancer

Study Overview
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Brief Summary
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RATIONALE: Drugs used in chemotherapy, such as gemcitabine and docetaxel, work in different ways to stop the growth of tumor cells, either by killing the cells or by stopping them from dividing. Giving more than one drug (combination chemotherapy) may kill more tumor cells. PURPOSE: This phase II trial is studying how well giving gemcitabine together with docetaxel works in treating patients with metastatic prostate cancer.

Detailed Description
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OBJECTIVES: Determine the objective response rate and toxicity in patients with androgen-independent metastatic prostate cancer treated with gemcitabine hydrochloride and docetaxel. OUTLINE: This is an open-label study. Patients receive gemcitabine hydrochloride IV over 30 minutes on days 1 and 8 followed by docetaxel IV over 60 minutes on day 8. Treatment repeats every 3 weeks for up to 6 courses in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed periodically for at least 5 years. PROJECTED ACCRUAL: A total of 36 patients will be accrued for this study.

Official Title
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Phase II Trial of Gemcitabine And Docetaxel In Androgen-Independent Metastatic Prostate Cancer

Conditions
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Prostate Cancer

Intervention / Treatment
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* Drug: docetaxel
* Drug: gemcitabine hydrochloride


Participation Criteria
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Eligibility Criteria
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DISEASE CHARACTERISTICS: Histologically confirmed adenocarcinoma of the prostate Androgen-independent metastatic prostate cancer with evidence of clinical, radiographic, or biochemical progression in the setting of castrate levels of testosterone (< 50 mg/dL) No androgen-independent prostate cancer with a rising prostate-specific antigen (PSA) without clinical or radiographic evidence of metastases Clinical or radiographic evidence of metastatic disease with a rising PSA measured 2 times at ≥ 1 week interval allowed Antiandrogen therapy must have been stopped at least 4 weeks (for flutamide) or 6 weeks (for bicalutamide or nilutamide) prior to study entry with evidence of either a rising PSA (from baseline) measured twice at least 2 weeks apart or radiographic evidence of disease progression Testicular androgen suppression (< 50 mg/dL) must be maintained with either luteinizing-hormone releasing-hormone (LHRH) therapy or bilateral orchiectomy No clinical evidence of CNS metastases PATIENT CHARACTERISTICS: ECOG performance status 0-2 Absolute neutrophil count ≥ 1,500/mm^3 Platelet count ≥ 100,000/mm^3 Bilirubin ≤ 1.5 mg/dL AST and ALT ≤ 2 times normal Creatinine < 2 mg/dL No history of severe uncontrolled congestive heart failure (CHF), ventricular dysrhythmias, or severe cardiovascular disease (American Heart Association class III or IV) Disease-free of prior malignancies for ≥ 5 years, with the exception of curatively treated basal cell or squamous cell carcinoma of the skin or low-grade, low-stage bladder cancer No active infection or parenteral antibiotics within 7 days of study entry Fertile patients must use effective contraception PRIOR CONCURRENT THERAPY: See Disease Characteristics No radiation therapy within 4 weeks prior to study entry No filgrastim (G-CSF) within 24 hours before or after study therapy No prior systemic chemotherapy for metastatic disease Neoadjuvant or adjuvant non-taxane chemotherapy more than 1 year prior to study entry allowed No concurrent local radiotherapy for control of pain or life-threatening situations

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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Male

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Gemcitabine and Docetaxel i<br> | Drug: docetaxel<br>* docetaxel IV over 60 minutes on day 8. Treatment repeats every 3 weeks for up to 6 courses in the absence of disease progression or unacceptable toxicity.<br>Drug: gemcitabine hydrochloride<br>* IV over 30 minutes on days 1 and 8 followed by docetaxel IV over 60 minutes on day 8. Treatment repeats every 3 weeks for up to 6 courses in the absence of disease progression or unacceptable toxicity.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Objective PSA Response Rate (Number of Patients With a PSA Response) | Decline from a baseline value by ≥ 50% or normalization of PSA (< 0.03) confirmed by a second measurement at least 1 week or more weeks later. Patients must not demonstrate clinical or radiographic evidence of disease progression during this time period. The date of response will be defined as the first date at which the PSA declined from baseline by ≥ 50% or normalized. | every 4 weeks | 
| Number of Patients With Measurable Soft Tissue Disease Will be Assessed Per Solid Tumor Response Criteria (RECIST). | Patients who have a response of Complete Response (CR), Partial Response (PR), or Stable Disease (SD) by RECIST criteria. To be assigned a status of PR or CR, changes in tumor measurements must be confirmed by repeat assessments that should be performed no less than 4 weeks after the criteria for response are first met. In the case of SD, patients who do not meet the criteria for response or progressive disease for at least 90 days will be categorized as stable disease. | at 4 weeks after treatment completion | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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stage IV prostate cancer, adenocarcinoma of the prostate