Williams Syndrome (WS) and Supravalvular Aortic Stenosis (SVAS) DNA and Tissue Bank

Updated on 23 November 2020
supravalvular aortic stenosis
rare diseases



DNA tells the body how to grow and function.

  • Williams-Beuren syndrome (WS) and Supravalvular Aortic Stenosis (SVAS) are rare diseases caused by changes in a part of a person's DNA.
  • Symptoms of both conditions include vascular problems including narrow blood vessels and supravalvular aortic stenosis (SVAS) or supravalvular pulmonary stenosis.
  • Individuals with WS may also have developmental challenges and personality differences.

Researchers at the NIH want to find out why only some people with WS and SVAS have severe symptoms. They want to collect samples and data to see what DNA or environmental changes affect the severity of the disease.


  • To identify the DNA differences or environmental changes that change the severity of WS and SVAS from person to person.


  • People ages 0 - 85 with either WS, SVAS, and/or an SVAS-like condition
  • Children and people with WS must have a parent or legal guardian to consent or help answer questions.


  • Participants will be screened with questions and medical history.
  • Participants will have a 60-minute visit. They will provide blood or saliva samples.
  • They or their parent/guardian will:
  • Answer questions about how WS and SVAS affect them.
  • Sign a form releasing their medical records for the study.
  • If participant s regular doctor recommends surgery, researchers will ask the surgeon for skin or tissue samples that they might otherwise discard. These will be used to create stem cells to study in a lab.
  • For up to 20 years, participants will have annual questionnaires by phone, email, or mail about their WS or SVAS.
  • Participants may also be contacted if:
    • They need to provide a new blood or saliva sample.
    • Researchers need any other data.

There is a follow-up study.

Please visit our Patient Recruitment Page for more information.



Our goal with the Williams syndrome (WS) and Supravalvular Aortic Stenosis (SVAS), deoxyribonucleic acid (DNA) and Tissue Bank is to collect enough samples from individuals with this rare condition to ask questions about the genes that cause the many WS and SVAS related phenotypes, and to determine the genetic and environmental changes that modify the severity of disease from person to person. In addition, we would like to learn more about the natural history of these conditions and if there are environmental or genetic signatures that are associated with symptom presence.

The protocol detailed here will provide for the collection of historical information, laboratory and imaging data, DNA and tissue to perform these studies now and in the future. Because technology changes rapidly and because this is a rare condition, our goal is to generate a collection that will be available for analysis for many years.

In addition to DNA and tissue collection proposed, we would like to begin to use the specimens collected here to continue to ask questions about modifiers of vascular disease severity as well as effects on other organ systems in WS and SVAS.


Please visit our Patient Recruitment Page for more information.

Condition Williams syndrome, Williams-Beuren syndrome (WS), SVAS, WS, Cardiovascular Disease, Williams Syndrome, Supravalvular Aortic Stenosis
Clinical Study IdentifierTX218177
Last Modified on23 November 2020


Yes No Not Sure

Inclusion Criteria

We will recruit individuals with WS, SVAS, or SVAS-like conditions
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
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 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 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)
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How to participate?

Step 1 Connect with a study center
What happens next?
  • You can expect the study team to contact you via email or phone in the next few days.
  • Sign up as volunteer to help accelerate the development of new treatments and to get notified about similar trials.

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Additional screening procedures may be conducted by the study team before you can be confirmed eligible to participate.

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If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

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Complete your scheduled study participation activities and then you are done. You may receive summary of study results if provided by the sponsor.

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