Bone Properties in Hypoparathyroidism: Effects of PTH

July 14, 2015 updated by: John P. Bilezikian
Whereas much information is known about the properties of bone in primary hyperparathyroidism, a disorder of parathyroid hormone (PTH) excess, virtually nothing is known about the skeleton in hypoparathyroidism, a disorder in which PTH is absent. The purpose of this research project is to test the hypothesis that the skeleton in hypoparathyroidism is abnormal in its metabolic, densitometric, geometric, biomechanical and microarchitectural features. We will also test the hypothesis that the skeleton is dependent upon PTH for normal structure and function. Using non-invasive approaches as well as direct analysis of bone itself, the human hypoparathyroid skeleton will be thoroughly characterized. With each patient serving as his/her own control, we will determine how, to what extent, and in what ways the administration of PTH restores skeletal dynamics and structure to the hypoparathyroid skeleton. In this way, we will identify those structural and dynamic elements of the skeleton that are influenced by or dependent upon PTH. Methods to be utilized include dual energy X-ray absorptiometry, quantitative central and peripheral computed tomography, geometry and size quantification, histomorphometry by standard and microCT methods, finite element analysis, biochemical bone markers, quantitative back scattered electron imaging, and Fourier Transform Infrared Spectroscopy. This research project will extend our knowledge of the skeletal effects of PTH to its deficient range and thus complete our understanding of PTH action on bone gained by our many years of studying PTH overexpression in primary hyperparathyroidism. This investigation may also provide insight into the means by which PTH helps to restore the skeleton when it is used to treat osteoporosis.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

A detailed description of the methods used in this study include the following: direct analysis of bone itself. skeletal dynamics and structure such as dual energy X-ray absorptiometry, quantitative central and peripheral computed tomography, geometry and size quantification, histomorphometry by standard and microCT methods, finite element analysis, biochemical bone markers, quantitative back scattered electron imaging, and Fourier Transform Infrared Spectroscopy.

Study Type

Interventional

Enrollment (Actual)

68

Phase

  • Phase 2
  • 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
    • New York
      • New York, New York, United States, 10032
        • Columbia University

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

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Hypoparathyroidism

Exclusion Criteria:

  • Bisphosphonate use

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: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: PTH(1-84)
100mcg of PTH1-84 every other day, every day, or every three days
Drug: PTH
Other Names:
  • teriparatide
  • Preotact
  • Natpara
  • PTH1-84
  • rhPTH

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Requirements for Calcium Supplementation
Time Frame: 2 years
Serum and urinary calcium levels maintained by change in requirements for calcium supplementation
2 years

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Percent Change in BMD From Baseline to 24 Months by DXA
Time Frame: baseline versus 24 months
Bone Mineral Density (BMD) as measured by Dual-energy X-ray absorptiometry (DXA).
baseline versus 24 months
Trabecular Width
Time Frame: baseline versus two years
Trabecular width was obtained from histomorphometric assessment of percutaneous iliac crest bone biopsy. Trabecular width is the thickness of individual pieces of the spongy bone section. The structure and microscopic organization of a small piece of biopsied pelvic bone was analyzed.
baseline versus two years
Trabecular Number
Time Frame: baseline versus two years
trabecular number done on histomorphometric assessment of percutaneous iliac crest bone biopsy. Trabecular number is the number of individual pieces of the spongy bone section. The structure and microscopic organization of a small piece of biopsied pelvic bone was analyzed.
baseline versus two years
Cortical Porosity
Time Frame: baseline versus two years
Cortical porosity done on histomorphometric assessment of percutaneous iliac crest bone biopsy. Cortical Porosity measures how many tiny holes there are in the solid bone section. The structure and microscopic organization of a small piece of biopsied pelvic bone was analyzed.
baseline versus two years
Mineralizing Surface
Time Frame: baseline versus one year
Mineralizing surface done on histomorphometric assessment of percutaneous iliac crest bone biopsy. Mineralizing surface measures how much of bone is getting new mineral put on it. The structure and microscopic organization of a small piece of biopsied pelvic bone was analyzed.
baseline versus one year

Collaborators and Investigators

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

Sponsor

John P. Bilezikian

Collaborators

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

Investigators

  • Principal Investigator: John P Bilezikian, MD, Columbia University

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, 2004

Primary Completion (Actual)

January 1, 2011

Study Completion (Actual)

June 1, 2014

Study Registration Dates

First Submitted

May 14, 2007

First Submitted That Met QC Criteria

May 14, 2007

First Posted (Estimate)

May 15, 2007

Study Record Updates

Last Update Posted (Estimate)

July 16, 2015

Last Update Submitted That Met QC Criteria

July 14, 2015

Last Verified

July 1, 2015

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • AAAA5457
  • R01DK069350 (U.S. NIH Grant/Contract)

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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