Expired Study
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New York, New York 10029


Purpose:

Hearing loss and loss of vision can be very harmful to the well-being and life of people who suffer from them. Usher syndrome is the name of a disease where people have both hearing loss and visual loss. In fact more than half of people who are deaf and blind have Usher syndrome. In this study we are trying to find the causes of all types of Usher syndrome and to learn more about how the eyes and ears work. Usher syndrome is caused by changes in our genes that lead to mistakes in the functioning of our eyes and ears. We may conduct hearing tests called audiograms to test hearing and a vision test called an electroretinogram (ERG) to test how well the retina (the part of your eye that senses light) is working on participants in the study. From these tests we can tell what kind of Usher syndrome a participant may have. We will then get DNA from participants by drawing blood. The DNA will be studied, along with DNA from members of the participant's family and other families, to try to find the gene that is causing Usher syndrome in the participant. Once the gene is found we will be able to study it to learn more about how the eyes and ears work. If a subject has already been diagnosed we may just need copies of their medical records and blood can be drawn locally. In order to increase the power of the study and the likelihood of detecting relevant genes participants will be taken from the Ashkenazi Jewish population group only. This will make it much easier to find the genes.


Criteria:

Inclusion criteria: Any Ashkenazi Jewish individual with combined hearing and visual loss that is or may be any type of Usher syndrome, or a family member of said individual. Exclusion criteria: Any individual who is not an Ashkenazi Jew or does not have combined hearing and visual loss or whose disease has been previously determined not to be Usher syndrome.


Study is Available At:


Original ID:

NCRR-M01RR00071-0374


NCT ID:

NCT00016471


Secondary ID:


Study Acronym:


Brief Title:

A Genetic Analysis of Usher Syndrome in Ashkenazi Jews


Official Title:

A Genetic Analysis of Usher Syndrome in Ashkenazi Jews


Overall Status:

Completed


Study Phase:

N/A


Genders:

Both


Minimum Age:

N/A


Maximum Age:

N/A


Quick Facts

Healthy Volunteers
Oversight Has DMC
Study Is FDA Regulated
Study Is Section 801
Has Expanded Access

Study Source:

National Center for Research Resources (NCRR)


Oversight Authority:

United States: Federal Government


Reasons Why Stopped:


Study Type:

Observational


Study Design:

Observational Model: Defined Population, Observat


Number of Arms:

0


Number of Groups:

0


Total Enrollment:

0


Enrollment Type:


Study Dates

Start Date:March 2001
Completion Date:February 2002
Verification Date:November 2003
Last Changed Date:June 23, 2005
First Received Date:May 7, 2001

Study Outcomes

There are no available Study Outcomes

Study Interventions

Intervention Type:Procedure
Name:Audiogram
Intervention Type:Procedure
Name:Electroretinogram

Study Arms

There are no available Study Arms

Study Agencies

Agency Class:NIH
Agency Type:Lead Sponsor
Agency Name:National Center for Research Resources (NCRR)

Sample and Retention Information

There are no available Sample and Retention Information

Study References

Reference Type:Reference
Citation:Ben-Yosef T, Ness SL, Madeo AC, Bar-Lev A, Wolfman JH, Ahmed ZM, Desnick RJ, Willner JP, Avraham KB, Ostrer H, Oddoux C, Griffith AJ, Friedman TB. A mutation of PCDH15 among Ashkenazi Jews with the type 1 Usher syndrome. N Engl J Med. 2003 Apr 24;348(17):1664-70. No abstract available.
PMID:12711741
Reference Type:Reference
Citation:Ness SL, Ben-Yosef T, Bar-Lev A, Madeo AC, Brewer CC, Avraham KB, Kornreich R, Desnick RJ, Willner JP, Friedman TB, Griffith AJ. Genetic homogeneity and phenotypic variability among Ashkenazi Jews with Usher syndrome type III. J Med Genet. 2003 Oct;40(10):767-72. No abstract available.
PMID:14569126

Data Source: ClinicalTrials.gov

Date Processed: January 21, 2020

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