Energy Expenditure and Body Composition in Pseudohypoparathyroidism 1a

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: NCT01398774
Recruitment Status : Active, not recruiting
First Posted : July 21, 2011
Last Update Posted : May 3, 2017
Information provided by (Responsible Party):
Children's Hospital of Philadelphia

Brief Summary:
The investigators would like to learn more about the metabolic consequences of pseudohypoparathyroidism type 1a in children, adolescents and adults with this condition. People with pseudohypoparathyroidism 1a are at risk for development of obesity. To better understand the cause of overweight or obesity, investigators are measuring body composition and resting energy expenditure (REE), which is the amount of calories burned while completely at rest. The investigators also want to determine the amount of body fat.

Condition or disease
Pseudohypoparathyroidism Type 1A Albright Hereditary Osteodystrophy

Detailed Description:

Pseudohypoparathyroidism 1a (PHP1a) is a disorder that is associated with many endocrine problems. People with PHP1a are at risk for the development of obesity. The objective of the study will help determine if obesity is related to abnormalities energy expenditure, meaning that people with PHP1a may not burn as many calories while at rest as those without the disorder.

In order to further evaluate obesity in PHP1a, investigators are planning to measure resting energy expenditure (REE), which is the amount of calories burned while completely at rest. Investigators will also evaluate body composition by looking at measures of growth and development and determining the amount of body fat using dual energy x-ray absorptiometry (DXA) as well as blood and urine biologic markers of obesity. The investigators plan to evaluate people with PHP1a at all weights.

Study Type : Observational
Actual Enrollment : 519 participants
Observational Model: Cohort
Time Perspective: Cross-Sectional
Official Title: Altered Resting Energy Expenditure as a Cause of Obesity in Pseudohypoparathyroidism 1a: A Pilot Study
Study Start Date : June 2011
Primary Completion Date : September 2015
Estimated Study Completion Date : April 2018

Primary Outcome Measures :
  1. Resting Energy Expenditure [ Time Frame: 30 minutes ]
    The subject will rest for 30 minutes in the lab prior to the start of the test. A 60-minute resting energy expenditure (REE) test will be performed between 7:00 and 10:00 A.M. with the subject resting quietly under a clear, plastic hood watching a videotape.

Secondary Outcome Measures :
  1. Characterize body composition in patients with PHP1a. [ Time Frame: 12 months ]
    Body composition outcomes will be characterized by whole body lean mass and fat mass sex- and race-specific z-scores relative to height.

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Ages Eligible for Study:   5 Years to 45 Years   (Child, Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population
Subjects with Pseudohypoparathyroidism 1a

Inclusion Criteria:

  • Diagnosis of pseudohypoparathyroidism 1a
  • Any body weight

Exclusion Criteria:

  • Absence of above diagnosis

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01398774

United States, Pennsylvania
Children's Hospital of Philadelphia
Philadelphia, Pennsylvania, United States, 19104
Sponsors and Collaborators
Children's Hospital of Philadelphia
Principal Investigator: Michael A Levine, M.D. Children's Hospital of Philadelphia

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Children's Hospital of Philadelphia Identifier: NCT01398774     History of Changes
Other Study ID Numbers: 11-007972
First Posted: July 21, 2011    Key Record Dates
Last Update Posted: May 3, 2017
Last Verified: May 2017

Keywords provided by Children's Hospital of Philadelphia:
Albright Hereditary Osteodystrophy

Additional relevant MeSH terms:
Bone Diseases, Metabolic
Bone Diseases
Musculoskeletal Diseases
Metal Metabolism, Inborn Errors
Metabolism, Inborn Errors
Genetic Diseases, Inborn
Metabolic Diseases
Calcium Metabolism Disorders