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Vitamin D Metabolism and the Williams Syndrome

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ClinicalTrials.gov Identifier: NCT00013962
Recruitment Status : Completed
First Posted : April 5, 2001
Last Update Posted : June 24, 2005
Information provided by:
National Center for Research Resources (NCRR)

Brief Summary:
The Williams syndrome is a disease in which supravalvular aortic stenosis, an elfin facies, mental retardation and other congenital defects are sometimes associated with abnormal vitamin D and calcium metabolism. Whereas some patients have been reported to show increased sensitivity to vitamin D or an exaggerated response of serum 25-hydroxyvitamin D {25(OH)D} to administration of vitamin D and to have hypercalcemia caused by increased circulating 1,25-dihydroxyvitamin D{1,25(OH)2D} in infancy and early childhood, most patients have normal calcium metabolism and normal values for circulating 25(OH)D and 1,25(OH)2D. We propose to carry out further studies of vitamin D metabolism to elucidate the mechanism(s) for abnormal vitamin D metabolism. We will determine the response of serum 1,25(OH)2D to administration of 1,25(OH)2D3. Measurement of the 1,25(OH)2D in the patients compared to normal subjects will be the primary outcome.

Condition or disease Intervention/treatment
Williams Syndrome Drug: Vitamin D

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Study Type : Observational
Observational Model: Case-Control
Official Title: Vitamin D Metabolism and the Williams Syndrome

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 50 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Age 18 years to 50 years of age, patients and normal subjects

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 ClinicalTrials.gov identifier (NCT number): NCT00013962

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United States, South Carolina
Medical University of South Carolina
Charleston, South Carolina, United States, 29425
Sponsors and Collaborators
National Center for Research Resources (NCRR)
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ClinicalTrials.gov Identifier: NCT00013962    
Other Study ID Numbers: NCRR-M01RR01070-0562
First Posted: April 5, 2001    Key Record Dates
Last Update Posted: June 24, 2005
Last Verified: December 2003
Additional relevant MeSH terms:
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Williams Syndrome
Pathologic Processes
Intellectual Disability
Neurobehavioral Manifestations
Neurologic Manifestations
Nervous System Diseases
Aortic Stenosis, Supravalvular
Aortic Valve Stenosis
Aortic Valve Disease
Heart Valve Diseases
Heart Diseases
Cardiovascular Diseases
Chromosome Disorders
Congenital Abnormalities
Genetic Diseases, Inborn
Vitamin D
Physiological Effects of Drugs
Bone Density Conservation Agents