Calcitriol and Dexamethasone in Treating Patients With Prostate Cancer Who Have Undergone Surgery or Radiation Therapy

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00054522
Recruitment Status : Completed
First Posted : February 6, 2003
Last Update Posted : March 8, 2011
Information provided by:
Roswell Park Cancer Institute

February 5, 2003
February 6, 2003
March 8, 2011
April 2002
January 2006   (Final data collection date for primary outcome measure)
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Complete list of historical versions of study NCT00054522 on Archive Site
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Calcitriol and Dexamethasone in Treating Patients With Prostate Cancer Who Have Undergone Surgery or Radiation Therapy
Calcitriol + Dexamethasone in Early, Recurrent Prostate Cancer Following Local Therapy, A Phase I/II Trial

RATIONALE: Calcitriol may help tumor cells develop into normal cells. Dexamethasone may increase the effectiveness of calcitriol by making tumor cells more sensitive to the drug.

PURPOSE: Phase II trial to study the effectiveness of combining calcitriol with dexamethasone in treating patients with prostate cancer who have undergone surgery or radiation therapy.


  • Determine whether calcitriol and dexamethasone can slow the rise in prostate-specific antigen (PSA) levels in patients with early, recurrent prostate cancer after prior radical prostatectomy or radiotherapy.
  • Determine the safety of this regimen in these patients.
  • Determine the utility of serum PSA in monitoring the therapeutic effect of calcitriol in these patients.

OUTLINE: Patients are stratified according to prior therapy (radical prostatectomy vs radiotherapy).

Patients receive oral calcitriol once daily on days 1-3 alone on week 1. Beginning on week 3, patients receive calcitriol as in week 1 and oral dexamethasone on days 0-4. Courses repeat every 2 weeks in the absence of disease progression or unacceptable toxicity.

PROJECTED ACCRUAL: A total of 56 patients (28 per stratum) will be accrued for this study.

Phase 2
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Prostate Cancer
  • Dietary Supplement: calcitriol
  • Drug: dexamethasone
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*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
March 2006
January 2006   (Final data collection date for primary outcome measure)


  • Histologically confirmed adenocarcinoma of the prostate meeting all of the following criteria:

    • Curatively treated with radical prostatectomy OR definitive radiotherapy
    • No signs of clinical recurrence or dissemination of prostate cancer by digital rectal examination without tumor
    • No local recurrence by CT scan or MRI of the pelvis
    • No metastases by bone scan and chest x-ray NOTE: Prior Prostascint scans allowed regardless of results
  • At least 3 prostate-specific antigen (PSA) measurements obtained over at least 90 days after radical prostatectomy on post-radiotherapy PSA nadir must be available

    • PSA at least 2 ng/mL after prostatectomy OR at least 4 ng/mL after prior radiotherapy
    • Patients previously treated with radiotherapy must have a PSA clearly rising from lowest value within 6 months after completion of therapy



  • 18 and over

Performance status

  • ECOG 0-1

Life expectancy

  • At least 12 months


  • Platelet count at least 100,000/mm^3
  • Hemoglobin at least 10 g/dL


  • Bilirubin no greater than upper limit of normal (ULN)
  • Alkaline phosphatase no greater than 2 times ULN


  • Creatinine less than 1.8 mg/dL
  • Phosphorus normal
  • No hypercalcemia (albumin-corrected calcium greater than ULN)
  • No nephrolithiasis

    • Single episode of renal lithiasis allowed provided episode occurred more than 5 years prior to study


  • Fertile patients must use effective double-barrier contraception for at least 1 week before, during, and for at least 2 weeks after study
  • No symptomatic pancreatitis
  • No uncontrolled diabetes
  • No known or suspected inability to comply with study requirements (e.g., abuse of alcohol/drugs or psychotic states)
  • Curatively treated condition associated with renal stones (e.g., hyperparathyroidism, bladder dysfunction, or obstructive uropathy) allowed provided patient has been free of stone formation for more than 5 years


Biologic therapy

  • Not specified


  • No prior chemotherapy for prostate cancer
  • At least 24 months since prior chemotherapy for other diseases

Endocrine therapy

  • More than 6 months since prior hormonal therapy, including neoadjuvant or adjuvant androgen deprivation therapy (e.g., luteinizing hormone-releasing hormone analogue or antiandrogen)
  • No prior androgen deprivation therapy of more than 8 months duration
  • No prior hormonal therapy for prostate cancer more than 3 months after definitive local therapy
  • No concurrent androgen therapy


  • See Disease Characteristics
  • More than 3 months since prior radiotherapy for locally recurrent prostate cancer
  • No concurrent radiotherapy, including for pain control


  • See Disease Characteristics


  • More than 4 weeks since prior investigational drugs
  • No concurrent medication known to affect systemic calcium metabolism, including any of the following:

    • More than 400 IU of cholecalciferol supplements
    • More than 500 IU of vitamin A supplements
    • Calcium supplements
    • Fluoride
    • Antiepileptics
Sexes Eligible for Study: Male
18 Years and older   (Adult, Senior)
Contact information is only displayed when the study is recruiting subjects
United States
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Donald Trump, MD, Roswell Park Cancer Institute
Roswell Park Cancer Institute
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Study Chair: Donald L. Trump, MD Roswell Park Cancer Institute
Roswell Park Cancer Institute
March 2011

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP