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RATIONALE: Calcitriol may help prostate cancer cells develop into normal cells. Zoledronate may delay or prevent the formation of bone metastases. Combining calcitriol and zoledronate may be an effective treatment for progressive prostate cancer.
PURPOSE: Phase I trial to study the effectiveness of combining calcitriol with zoledronate in treating patients who have progressive prostate cancer.
- Determine the maximum tolerated dose of calcitriol administered with zoledronate in patients with progressive prostate cancer.
- Assess the effects of this regimen on calcium homeostasis and bone turnover in this patient population.
- Assess changes in PSA in patients treated with this regimen.
- Determine other antitumor effects of this regimen in these patients.
OUTLINE: This is a dose-escalation study of calcitriol.
Patients receive oral calcitriol weekly for 3 consecutive days and zoledronate IV monthly. Treatment continues in the absence of unacceptable toxicity or disease progression.
Cohorts of 3-6 patients receive escalating doses of calcitriol until the maximum tolerated dose (MTD) is determined. The MTD is defined as the dose preceding that at which 2 of 3 or 3 of 6 patients experience dose-limiting toxicity.
PROJECTED ACCRUAL: A total of 30 patients will be accrued for this study within 1 year.
Primary Purpose: Treatment
calcitriol, zoledronic acid
Memorial Sloan-Kettering Cancer Center
National Cancer Institute (NCI)
Published on BioPortfolio: 2014-08-27T03:58:07-0400
This study aims to determine whether early treatment with zoledronic acid, that is given during the early phase of advanced prostate cancer, will be more efficacious than delayed treatment
Primary: To determine the duration of use of zoledronic acid in improving Bone mineral density in patients with prostate cancer who are on hormones intermittently. Secondary Object...
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To assess the effects of i.v. zoledronic acid 4 mg with respect to safety and tolerability
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A glycoprotein that is a kallikrein-like serine proteinase and an esterase, produced by epithelial cells of both normal and malignant prostate tissue. It is an important marker for the diagnosis of prostate cancer.
Proteins secreted by the prostate gland. The major secretory proteins from the human prostate gland include PROSTATE-SPECIFIC ANTIGEN, prostate-specific acid phosphatase, prostate-specific membrane antigen, and prostate-specific protein-94.
Proteins, usually found in the cytoplasm, that specifically bind calcitriol, migrate to the nucleus, and regulate transcription of specific segments of DNA with the participation of D receptor interacting proteins (called DRIP). Vitamin D is converted in the liver and kidney to calcitriol and ultimately acts through these receptors.
A synthetic retinoid that is used orally as a chemopreventive against prostate cancer and in women at risk of developing contralateral breast cancer. It is also effective as an antineoplastic agent.
Tissue ablation of the PROSTATE performed by ultrasound from a transducer placed in the RECTUM. The procedure is used to treat prostate cancer (PROSTATIC NEOPLASMS) and benign prostatic hypertrophy (PROSTATIC HYPERPLASIA).
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