Calcitriol in Treating Patients With a Rising PSA Level Following Treatment for Prostate Cancer

Study Overview
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Brief Summary
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RATIONALE: Calcitriol, a form of vitamin D, may be able to prevent or slow the growth of prostate cancer cells. PURPOSE: Phase II trial to study the effectiveness of calcitriol in treating patients who have a rising PSA level following previous treatment for prostate cancer.

Detailed Description
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OBJECTIVES: I. Determine the response to pulse calcitriol in patients with previously treated adenocarcinoma of the prostate with rising PSA levels. II. Assess the impact of this regimen on the slope of the PSA rise in these patients. III. Determine the qualitative and quantitative toxic effects of this regimen in these patients. IV. Assess the impact of this regimen on the quality of life of these patients. OUTLINE: All patients remain on a reduced calcium diet for the duration of the study. Twelve hours prior to treatment, patients begin drinking 4-6 glasses of extra fluid for 3 days. Patients receive oral calcitriol over 4 hours weekly. Treatment continues in the absence of disease progression or unacceptable toxicity. Quality of life is assessed at baseline, every 4 weeks during treatment, and at the end of the study. Patients are followed for at least 1 month. PROJECTED ACCRUAL: A total of 15-25 patients will be accrued for this study.

Official Title
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Phase II Study of Pulse Calcitriol in Patients With Rising PSA After Definitive Treatment for Prostate Cancer

Conditions
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Prostate Cancer

Intervention / Treatment
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* Dietary Supplement: calcitriol


Participation Criteria
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Eligibility Criteria
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DISEASE CHARACTERISTICS: Histologically or cytologically proven adenocarcinoma of the prostate previously treated with prostatectomy or definitive radiotherapy Rising PSA after post definitive therapy nadir on at least 3 measurements at least 2 weeks apart PSA at least 0.4 ng/mL for prostatectomy patients PSA at least 1.0 ng/mL for radiotherapy patients PATIENT CHARACTERISTICS: Age: 18 and over Performance status: ECOG 0-2 Life expectancy: Greater than 2 months Hematopoietic: Not specified Hepatic: Not specified Renal: Phosphate no greater than 4.2 mg/dL Creatinine no greater than 1.3 mg/dL Calcium no greater than 10.5 mg/dL No history of hypercalcemia Cardiovascular: No significant heart disease No myocardial infarction within past 3 months No history of heart failure Cardiac ejection fraction at least 30% Other: No other significant active medical illness that would preclude compliance Fertile patients must use effective contraception PRIOR CONCURRENT THERAPY: Biologic therapy: Not specified Chemotherapy: No prior systemic chemotherapy for metastatic prostate cancer (except neoadjuvant treatment for localized prostate cancer) Endocrine therapy: No prior systemic hormonal therapy for prostate cancer (except neoadjuvant treatment for localized prostate cancer) Radiotherapy: See Disease Characteristics Surgery: See Disease Characteristics Other: No other concurrent systemic therapy for metastatic prostate cancer At least 30 days since other prior investigational drugs No concurrent digoxin At least 7 days since prior thiazide diuretic therapy No concurrent magnesium containing antacids, bile resin binding drugs, or calcium supplements

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 120 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

| Intervention/Treatment |
| --- |
|Dietary Supplement: calcitriol|nan|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |

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