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Evaluate the Effect of Growth Hormone (GH) Treatment on Fibroblast Growth Factor 23, a Known Phosphaturic Agent

This study has been completed.
Genentech, Inc.
Information provided by (Responsible Party):
Ambika Ashraf, M.D., University of Alabama at Birmingham Identifier:
First received: June 7, 2006
Last updated: November 11, 2011
Last verified: November 2011

The purpose of this study is to evaluate the effect of growth hormone treatment on phosphorus levels in the body. Phosphorus is an important mineral for bone growth. It is well known that growth hormone treatment improves bone density and bone mineral content. The amount of phosphorus is maintained by the kidneys. Fibroblast Growth Factor 23 has recently been recognized to help kidneys control phosphate levels.

Growth Disorders

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective
Official Title: Evaluate the Effect of Growth Hormone (GH) Treatment on Fibroblast Growth Factor 23 (a Known Phosphaturic Agent)

Resource links provided by NLM:

Further study details as provided by University of Alabama at Birmingham:

Enrollment: 35
Study Start Date: April 2006
Study Completion Date: August 2011
Primary Completion Date: June 2010 (Final data collection date for primary outcome measure)
Growth Hormone
Patient ages 3-14 years receiving growth hormone for growth hormone deficiency or short stature
Healthy Children
Children with normal stature ages 3-18 years.

Detailed Description:

This study will compare Fibroblast Growth Factor 23 levels in children with and without growth hormone deficiency. Children with growth hormone deficiency will have levels taken before starting growth hormone replacement and after it has been initiated.


Ages Eligible for Study:   3 Years to 14 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population

Children attending Endocrinology clinics of Children's Hospital of Alabama. Ages are 3-14 years of age.


Inclusion Criteria:

  • Twenty children with significant short stature < 3rd percentile, ages 3-14 years, and referred to Children's Hospital of Alabama
  • Normal healthy volunteer children 3-18 years with normal stature

Exclusion Criteria:

  • Patients on medication including GH
  • Patients with concomitant hormonal abnormalities
  • Patients with disorders of calcium and phosphate metabolism
  • Active neoplasms
  • Closed epiphysis
  • Known bone disorders
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00334945

Sponsors and Collaborators
University of Alabama at Birmingham
Genentech, Inc.
Principal Investigator: Ambika Ashraf, MD University of Alabama at Birmingham
  More Information

No publications provided

Responsible Party: Ambika Ashraf, M.D., Principal Investigator, University of Alabama at Birmingham Identifier: NCT00334945     History of Changes
Other Study ID Numbers: X041104010, X3395n, Genentech X3395n
Study First Received: June 7, 2006
Last Updated: November 11, 2011
Health Authority: United States: Institutional Review Board

Keywords provided by University of Alabama at Birmingham:
Fibroblast Growth Factors
Bone development

Additional relevant MeSH terms:
Growth Disorders
Pathologic Processes
Hormones, Hormone Substitutes, and Hormone Antagonists
Mitosis Modulators
Molecular Mechanisms of Pharmacological Action
Pharmacologic Actions
Physiological Effects of Drugs processed this record on November 25, 2014