Gene First Approach to Connective Tissue Disease

NCT04664478 | Completed

• 2 other identifiers: 20015820-H-0158
• Study Type: observational
• Target: 32
• Locations: 1 country
• Sites: 1

Brief Summary

Background: Elastic fibers affect parts of the body that stretch repetitively, such as the skin, blood vessels, and lungs. Researchers want to use medical and research tests in patients with already identified changes in a set of connective tissue genes to better understand diseases related to elastic fibers. Objective: To learn more about the impact of underlying changes in a set of connective tissue genes on people s overall health. Eligibility: People ages 2-100 who have had a gene test that identified a change in a gene that affects elastic fibers. Initial emphasis will be placed on people with changes in ELN, LOX, MFAP4, FBLN5 and EFEMP2. Design: Participants will visit the NIH for several days to perform tests that will help researchers learn more about how changes in connective tissue genes affect a person s health. They will also have clinicians take their medical history and physical exam. Optional tests include giving blood samples, hair strand, urine, and/or saliva samples. They may have a cheek swab or skin biopsy. Their genes may be studied. Their cells may be grown in a laboratory. Participants may have photographs taken of the face and body. They will receive exams by a medical team with experience in connective tissue disease. They may have a dental exam or eye exams and with photography. During the eye exam, pictures may be taken of the blood vessels in the eyes. If this occurs, they will get dye through an intravenous (IV) line in an arm vein. They will also have medical tests to check the health of tissues that may be affected by these connective tissue genes. Participants may have lung function tests. They may have a six-minute walk test. They may complete a treadmill or bike stress test. Their heart s electrical activity may be recorded. Participants may have X-rays and ultrasounds. They may have a DEXA scan to measure bone density. They may have CT, MRI or other imaging scans. Some of these tests require the participant to get a contrast fluid via IV. Participants may have a skin elasticity test using a suction cup that pulls lightly on their skin. Participants may wear blood pressure cuffs while probes are placed on their skin. The tests will be chosen for each individual based on their specific gene change and no person is expected to complete all tests. Participation will last 3-5 days.

Conditions

Abnormal Elastogenesis; Vascular Diseases; Connective Tissue Diseases

Keywords

elastic fiber; gene variation; Phenotyping; genotype-phenotype correlations; elastin; Natural History

Outcome Measures

Primary Outcomes (1)

• The frequency of a set phenotypic observations

  The frequency of a set phenotypic observations for patients with variation in specified connective tissue genes.

  2 months

Secondary Outcomes (1)

• The frequency of specified phenotypes within genes in patients with specific genotypes and across connective tissue genes

  2 months

Study Arms (1)

Subjects with abnormal elastogenesis

Participants with genetic variant in the connective tissue target genes

Eligibility Criteria

• Age: 2 Years - 100 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Child (0-17), Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

Patients with variation in our genes of interest(relevant genotypes) to identify relevant phenotypes in the cohort via deep phenotyping.

You may qualify if:

• In order to be eligible to participate in this study, an individual must meet all of the following criteria:
• Participant must have a genetic variant in one of the connective tissue target genes identified on previous research or clinical genetic testing. A clinical or research report of the variant in question will be reviewed at the time of referral.
• This variant must be of sufficient interest for focused study to the clinical research team. Interest may be based on a variety of factors including: its population frequency, potential pathogenicity, or apparent genotype/phenotype associations in the medical record, among others.
• Male or female, within the ages of 2 and 100 years old.

You may not qualify if:

• \. Pregnancy or Nursing.
• Rationale for excluding pregnant women
• We do believe that pregnancy likely impacts connective tissue disease and deserves focused study. Unfortunately, we do not believe that our current study design will allow us to attract a large enough number of currently pregnant women to adequately power a direct study into the impacts of connective tissue disease on pregnancy. And the single visit nature of the study precludes following an individual throughout their pregnancy. As such, we have chosen to exclude currently pregnant women from the study. We do, however, welcome their participation once pregnancy is done. We expect that our history taking will include questions about pregnancy and so may still collect historical data related to these variants and pregnancy.

Sponsors & Collaborators

• National Heart, Lung, and Blood Institute (NHLBI): lead

Study Sites (1)

National Institutes of Health Clinical Center

Bethesda, Maryland, 20892, United States

Location

Related Links

• NIH Clinical Center Detailed Web Page

MeSH Terms

Conditions

Vascular Diseases; Connective Tissue Diseases; Aortic Stenosis, Supravalvular

Condition Hierarchy (Ancestors)

Cardiovascular Diseases; Skin and Connective Tissue Diseases; Aortic Valve Stenosis; Aortic Valve Disease; Heart Valve Diseases; Heart Diseases; Ventricular Outflow Obstruction

Study Officials

• Manfred Boehm, M.D.

  National Heart, Lung, and Blood Institute (NHLBI)

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: PROSPECTIVE
• Sponsor Type: NIH
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: December 10, 2020
• First Posted: December 11, 2020
• Study Start: April 22, 2021
• Primary Completion: August 29, 2025
• Study Completion: August 29, 2025
• Last Updated: September 4, 2025

Record last verified: 2025-08-29

Locations

US (1)