Vitamin D Metabolism and the Williams Syndrome - Tabular View

Tracking Information
First Received Date ^ICMJE	April 3, 2001
Last Updated Date	June 23, 2005
Start Date ^ICMJE
Primary Completion Date
Current Primary Outcome Measures ^ICMJE
Original Primary Outcome Measures ^ICMJE
Change History	Complete list of historical versions of study NCT00013962 on ClinicalTrials.gov Archive Site
Current Secondary Outcome Measures ^ICMJE
Original Secondary Outcome Measures ^ICMJE

Descriptive Information
Brief Title ^ICMJE	Vitamin D Metabolism and the Williams Syndrome
Official Title ^ICMJE	Vitamin D Metabolism and the Williams Syndrome
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.
Detailed Description
Study Phase
Study Type ^ICMJE	Observational
Study Design ^ICMJE	Natural History, Case Control
Condition ^ICMJE	Williams Syndrome
Intervention ^ICMJE	Drug: Vitamin D
Study Arms / Comparison Groups
Publications *
* Includes publications given by the data provider as well as publications identified by National Clinical Trials Identifier (NCT ID) in Medline.

Recruitment Information
Recruitment Status ^ICMJE	Completed
Enrollment ^ICMJE
Completion Date
Primary Completion Date
Eligibility Criteria ^ICMJE	Age 18 years to 50 years of age, patients and normal subjects
Gender	Both
Ages	18 Years to 50 Years
Accepts Healthy Volunteers	Yes
Contacts ^ICMJE	Contact information is only displayed when the study is recruiting subjects
Location Countries ^ICMJE	United States

Administrative Information
NCT ID ^ICMJE	NCT00013962
Responsible Party
Study ID Numbers ^ICMJE	NCRR-M01RR01070-0562
Study Sponsor ^ICMJE	National Center for Research Resources (NCRR)
Collaborators ^ICMJE
Investigators ^ICMJE
Information Provided By	National Center for Research Resources (NCRR)
Verification Date	December 2003
^ICMJE Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP