Scientists launch DNA bank to unlock secrets of rare heart and genetic conditions
NCT ID NCT02706639
First seen Jun 27, 2026 · Last updated Aug 28, 2026 · Updated 6 times
Summary
This study collected DNA, tissue, and medical history from 305 people with Williams syndrome or supravalvar aortic stenosis (SVAS), as well as their family members and healthy volunteers. The goal was to create a resource for future research to understand why symptoms vary so much from person to person. No treatments were tested; this was purely a sample and data collection effort.
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Study facts
What this study's own registry entry says, in plain language.
- Participants
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305 people
The number who actually took part.
- Started
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May 2016
- Finished
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Mar 2025
- Lead sponsor
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A government research agency
The lead sponsor is the US National Institutes of Health.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
Who is studied
Affected: 1) people with WS (adults and children), 2) people with ELN-related SVAS (adults and children), 3) people with SVAS-like conditions (those with an SVAS phenotype but no known pathologic variant in ELN, (adults and children)) 4) individuals with single or oligogenic variation in WS genes other than ELN (adults and children) Unaffected: 5) unaffected family members of participating subjects (children or adults), enrolled as controls 6) unrelated unaffected adult controls.
- Ages
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1 day to 85 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
* INCLUSION CRITERIA: We will recruit individuals with WS, SVAS or SVAS-like conditions, individuals with variation in WS genes other than ELN and unaffected family members or unrelated controls Children or adults participating in this study as part of the WS group must: * be between the ages of 0 and 85 * have a presumed or confirmed diagnosis of WS (typical or atypical deletions overlapping the WS region are acceptable, as are clinical diagnoses made by a physician familiar with WS) have a parent/guardian available to provide consent and assist in answering medical questions Children or adults participating in the study as part of the SVAS/SVAS-like group must: * be between the ages of 0 and 85 * have clinical features suggestive of SVAS or an SVAS-like condition OR have no clinical features of SVAS or of an SVAS-like condition but have genetic testing results that imply affected status (SVAS has decreased penetrance). Have a parent/guardian available to provide consent and assist in answering medical questions if they are a minor (not applicable to adults) Children or adults with WS region gene changes (variation affecting one or more WS region genes): * be between the ages of 0 and 85 * have clinical or research genetic testing that reports gene variation in one or more genes in the WS region (ELN variants alone will be considered in the SVAS category but other changes to the region that include ELN plus other genes may be grouped in this category). Have a parent/guardian available to provide consent and assist in answering medical questions if they are a minor or if they have cognitive impairment that would impede their ability to consent on their own behalf. Children or adults serving as unaffected family members or adult unrelated controls must: * family members be between the ages of one month old and 85 years old * unrelated controls be between the ages 18 and 85 years old * not carry a diagnosis of WS, SVAS, an SVAS-like condition or a known (at the time of enrollment) WS gene region variant. * In some cases, an individual may appear to be unaffected, but upon genetic testing may be found to be an asymptomatic carrier for gene variant. If that happens, they will be transferred to the appropriate affected research group. The eligible age range for unaffected family members participating in this study includes all family members from one month onwards. This inclusive approach is undertaken to comprehensively grasp the affected status across all family members, avoiding any form of age-based discrimination. Understanding that certain cases may not exhibit phenotypic indications of affected status at a young age, it becomes crucial to gather early health characteristics of individuals who may initially appear unaffected but later manifest disease findings. Participation in research, as previously noted, has a potential to identify people at risk who were previously thought to be healthy.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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National Institutes of Health Clinical Center
Bethesda, Maryland, 20892, United States
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Nationwide Children's Hospital
Columbus, Ohio, 43205, United States
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Washington University School of Medicine
St Louis, Missouri, 63110-1010, United States
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