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Measurement of Ca Kinetics in Humans With Prostate Cancer-induced Bone Disease

18 Years
Not Enrolling
Metastatic Cancer, Prostate Cancer

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Trial Information

Measurement of Ca Kinetics in Humans With Prostate Cancer-induced Bone Disease



- To measure the pharmacokinetics of a single oral dose of calcium-41 (41Ca) chloride
aqueous solution (^41Ca) over 18 months in patients with hormone-refractory prostate
cancer and bone metastasis.

- To correlate the ^41Ca-tracer kinetics with time to disease progression,
skeletal-related events, and death.


- To correlate modulations in baseline urinary ^41Ca clearance with changes in clinically
relevant disease parameters, including isotope bone scan data and PSA.

- To combine bone turnover assessments with ^41Ca and collagen/bone cell biomarkers with
clinical imaging techniques, especially isotope bone scans, to provide improved
stratification of disease stage.

OUTLINE: Patients receive oral calcium-41 (41Ca) chloride aqueous solution (^41Ca) on day 1.
Some patients also receive oral calcium-46 (46Ca) chloride aqueous solution (^46Ca).

Urine and blood specimens are collected periodically for 18 months. Blood samples are
assayed for bone collagen residues, bone alkaline phosphatase, and PSA. Urine specimens are
assessed for ^41Ca/Ca. Isotope bone scintigraphy is use to measure radioactivity.

After completion of study treatment, patients are followed up periodically for 3 years.

Inclusion Criteria

Eligibility Criteria

- Histologically or cytologically confirmed prostate cancer with a Gleason score
available or interpretable

- Prostate cancer deemed to be hormone refractory or androgen independent within the
past 12 months

- Evidence of bony metastasis

- Either be receiving bisphosphonate therapy or have received a bisphosphonate within
the last 18 months. Participants who are on not on bisphosphonate therapy nor have
received it within the last 18 months should currently be on Denosumab therapy. All
other anti-cancer therapies are allowed.

- Age >18 years

- ECOG performance status 0-2 (Karnofsky >50%).

- Life expectancy of 6 months or greater.

- Investigators are encouraged to follow good medical practice to assure that all
participants have adequate hematologic, hepatic, and renal function.

- Recent or planned isotope bone scan, within 12 months prior to enrollment.

- Ability to understand and the willingness to sign a written informed consent

Exclusion Criteria

- Participants will be excluded who have experienced a severe skeletal related event
(SRE)within the past 3 months. For this study, an SRE consists of any of the
following: palliative radiotherapy to bone, pathologic fractures, spinal cord
compression, hypercalcemia of malignancy, and surgery to bone to treat or prevent a

- Uncontrolled intercurrent illness including, but not limited to ongoing or active
infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac
arrhythmia, interstitial lung disease, chronic kidney disease, hyperthyroidism, or
psychiatric illness/social situations that would limit compliance with study

- Corrected serum calcium <8.0 mg/dL (2.0 mmol/L) or ≥12.0 mg/dL (3.0 mmol/L)

Type of Study:


Study Design:

Endpoint Classification: Pharmacokinetics Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Diagnostic

Outcome Measure:


Outcome Description:

Pre-dose specimens will be provided immediately prior to dose administration. Day 1 specimens shall be collected by the subjects 6 hours after dosing (at home); all subsequent urine specimens may be collected at any time during the day and blood specimens should be taken at the same time of day, if feasible (e.g., morning fasted).

Outcome Time Frame:

Samples will be collected over 18 months

Safety Issue:


Principal Investigator

Darren Hillegonds, PhD

Investigator Role:

Principal Investigator

Investigator Affiliation:

Lawrence Livermore National Laboratory at University of California


United States: Food and Drug Administration

Study ID:




Start Date:

September 2009

Completion Date:

June 2013

Related Keywords:

  • Metastatic Cancer
  • Prostate Cancer
  • stage IV prostate cancer
  • recurrent prostate cancer
  • bone metastases
  • Neoplasm Metastasis
  • Neoplasms
  • Neoplasms, Second Primary
  • Prostatic Neoplasms



Lawrence Livermore National LaboratoryLivermore, California  94550