Prevention of Osteoporosis in Men With Prostate Cancer

March 1, 2010 updated by: National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
The purpose of this two year study is to examine the safety and effectiveness of alendronate (Fosamax) for the prevention of bone loss in men with prostate cancer who are on therapy to lower their testosterone levels. All men will receive appropriate calcium and vitamin D supplements and one to two years of alendronate therapy. Bone density tests will be done every six months.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Prostate cancer is the most common visceral malignancy and second leading cause of cancer death in men. While androgen ablation therapy is the cornerstone of treatment for more advanced stage disease, recent studies suggest the advantage of introducing androgen deprivation much earlier. Because androgens are essential in maintaining skeletal integrity in men, androgen deprivation therapy constitutes a major risk factor for male osteoporosis. We have previously demonstrated that men on chronic androgen deprivation therapy have up to 20% loss of bone. Our hypotheses are that: 1) chronically increased bone resorption induced by long term androgen deprivation therapy in men with prostate cancer can be reversed with once weekly bisphosphonate; 2) the improvement in bone mass with bisphosphonate therapy will be reflected by changes in biochemical markers of bone turnover and will allow us to predict who will respond to therapy; and 3) following termination of bisphosphonate therapy, bone mass will be maintained despite the absence of antiresorptive therapy. To address these hypotheses, we will enroll 84 men with stage D0 prostate cancer who have been on chronic androgen deprivation therapy in a two year, double blind, placebo controlled, randomized, modified crossover clinical design. During the first year, subjects will be randomized to bisphosphonate therapy or placebo. During the second year, all subjects who were on placebo will receive active treatment and all subjects who were on active treatment will be randomly assigned to continue therapy or change to placebo. To evaluate the effect of bisphosphonate on preventing bone loss, we will assess bone mass of the spine, total hip, total body, and forearm by dual-energy X-ray absorptiometry. For hypothesis 2, we will assess markers of bone resorption and formation to determine if early changes in markers are associated with long term changes in bone mass. For hypothesis 3, we will continue to follow bone mass and biochemical markers of bone turnover between months 12 and 24 to examine rates of change when antiresorptive therapy is terminated. Few data are available on the prevention of bone loss in men on androgen deprivation therapy. This study will examine a preventive strategy, the potential mechanism of bone loss, the ability of biochemical markers to predict bone mass, and skeletal outcomes when antiresorptive therapy is withdrawn.

Study Type

Interventional

Enrollment

112

Phase

  • Phase 3

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Pennsylvania
      • Pittsburgh, Pennsylvania, United States, 15213-3221
        • Osteoporosis Prevention & Treatment Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

50 years to 85 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

Male

Description

Inclusion Criteria:

  • Men age 50-85
  • Stage D0 prostate cancer
  • On androgen deprivation therapy

Exclusion Criteria:

  • Renal failure
  • Hyperthyroidism
  • Cushing's syndrome
  • Metabolic bone disease
  • Use of glucocorticoids
  • Use of certain anticonvulsants
  • On osteoporosis therapies
  • Nonprostate cancers

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: Double

What is the study measuring?

Primary Outcome Measures

Outcome Measure
PA spine BMD over 1 year
Change in PA spine BMD over 2nd year

Secondary Outcome Measures

Outcome Measure
BMD at the hip and lateral spine

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

Investigators

  • Principal Investigator: Susan L. Greenspan, MD, University of Pittsburgh

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

May 1, 2002

Study Completion (Actual)

December 1, 2005

Study Registration Dates

First Submitted

November 8, 2002

First Submitted That Met QC Criteria

November 12, 2002

First Posted (Estimate)

November 13, 2002

Study Record Updates

Last Update Posted (Estimate)

March 2, 2010

Last Update Submitted That Met QC Criteria

March 1, 2010

Last Verified

March 1, 2010

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • DK61535 (completed)

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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