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Genetic Analysis of Familial Keloids

This study is currently recruiting participants. (see Contacts and Locations)
Verified June 2016 by National Institutes of Health Clinical Center (CC)
Sponsor:
Information provided by (Responsible Party):
National Institutes of Health Clinical Center (CC) ( National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) )
ClinicalTrials.gov Identifier:
NCT00008502
First received: January 12, 2001
Last updated: August 31, 2016
Last verified: June 2016
  Purpose

The purpose of this study is to identify the gene or genes responsible for keloid formation. Keloids are raised scars on the skin that form after a minor injury. A tendency to develop keloids often runs in families, suggesting a possible genetic basis.

People who have had a classic (butterfly-shaped or wound-overflowing) keloid for at least one year may be eligible for this study. In addition to these probands (original participants), family members over 12 years of age who have either classic or non-classic keloids and those 18 years of age or older without keloids may participate.

Probands and family members with keloids will have a medical history focusing on skin problems particularly keloids and a skin examination. In some cases, with the subject s permission, photos of the keloids will be taken. All participants will have 35 milliliters (about 2 tablespoons) of blood drawn for DNA (genetic) testing and for measurement of blood proteins, including cytokines, which can affect other tissues and cause scarring. Part of the blood sample will be used for additional genetic studies unrelated to keloids. The samples will be coded for confidentiality.


Condition
Keloid

Study Type: Observational
Study Design: Time Perspective: Cross-Sectional
Official Title: Genetic Analysis of Familial Keloids

Resource links provided by NLM:


Further study details as provided by National Institutes of Health Clinical Center (CC):

Primary Outcome Measures:
  • Finding a genetic locus [ Time Frame: 12/01/2018 ] [ Designated as safety issue: No ]

Estimated Enrollment: 200
Study Start Date: January 2001
Detailed Description:
Keloids represent a pathologic fibrosis which occurs in the skin after trauma and which grow beyond the boundaries of injury. Keloids occur in people of all racial backgrounds; however, individuals of African descent are more susceptible to the disease. A familial disposition to keloid formation has long been recognized, but the genetic basis for this racial and familial predisposition has not been identified. We hypothesize that the increased risk is a direct result of one or more disease susceptibility genes. We will pursue two approaches, which are presented as two study modules. In module 1, we will carry out a family study. We will identify affected pedigrees, each containing at least 3 individuals with keloids. Blood will be obtained and Epstein Barr virus-transformed permanent B cell lines will be established. We anticipate taking two analytic strategies. We will use candidate gene analysis, focusing initially on the CBP and TGF1B genes and a recently identified locus on chromosome 14, and we will use genome-wide markers to identify possible disease gene loci. In module 2, we will perform a genome scan to address the hypothesis that one or more African origin genetic variants account for the excess prevalence of keloids among African Americans. We will carry out a mapping by admixture linkage disequilibrium (MALD) scan, in order to find genetic regions where differences in the distribution of particular tagging single nucleotide polymorphisms (SNPs) between keloid cases and controls indicate excess African ancestry. Further analysis of these loci will be carried out to identify the causative genetic variants.
  Eligibility

Ages Eligible for Study:   Child, Adult, Senior
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria
  • INCLUSION CRITERIA:

    1. Proband: must have a butterfly-shaped or wound-overflowing keloid, present for at least one year (this description represents classic keloid, and avoids hypertrophic scar)
    2. Affected family members: all family members of the proband who have either classic keloids, as described above, or non-classic keloids, such as ball shaped-keloids on the ear.
    3. Unaffected family members: all family members who lack keloids.
    4. Impaired subjects for whom a legal guardian provides consent.
    5. Pregnant women.

EXCLSUION CIRTERIA:

  1. Subjects who are unwilling or unable to give informed consent or assent.
  2. Impaired individuals from whom it not possible to obtained parental consent (minors) or guardian consent (adults).
  3. Keloid patients who have <3 relatives with keoids.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00008502

Contacts
Contact: Jessica M Warren (301) 451-9946 jessica.warren@nih.gov
Contact: Jeffrey B Kopp, M.D. (301) 594-3403 jeffreyk@mail.nih.gov

Locations
United States, Maryland
National Institutes of Health Clinical Center, 9000 Rockville Pike Recruiting
Bethesda, Maryland, United States, 20892
Contact: For more information at the NIH Clinical Center contact Patient Recruitment and Public Liaison Office (PRPL)    800-411-1222 ext TTY8664111010    prpl@mail.cc.nih.gov   
Sponsors and Collaborators
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Investigators
Principal Investigator: Jeffrey B Kopp, M.D. National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
  More Information

Additional Information:
Publications:
Responsible Party: National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
ClinicalTrials.gov Identifier: NCT00008502     History of Changes
Other Study ID Numbers: 010062  01-DK-0062 
Study First Received: January 12, 2001
Last Updated: August 31, 2016
Health Authority: United States: Federal Government

Keywords provided by National Institutes of Health Clinical Center (CC):
Genetics
African Americans
Skin
Keloids
Familial Disposition

Additional relevant MeSH terms:
Keloid
Collagen Diseases
Connective Tissue Diseases
Cicatrix
Fibrosis
Pathologic Processes

ClinicalTrials.gov processed this record on September 27, 2016