A Genetic Analysis of Usher Syndrome in Ashkenazi Jews
|First Received Date ICMJE||May 7, 2001|
|Last Updated Date||June 23, 2005|
|Start Date ICMJE||March 2001|
|Primary Completion Date||Not Provided|
|Current Primary Outcome Measures ICMJE||Not Provided|
|Original Primary Outcome Measures ICMJE||Not Provided|
|Change History||Complete list of historical versions of study NCT00016471 on ClinicalTrials.gov Archive Site|
|Current Secondary Outcome Measures ICMJE||Not Provided|
|Original Secondary Outcome Measures ICMJE||Not Provided|
|Current Other Outcome Measures ICMJE||Not Provided|
|Original Other Outcome Measures ICMJE||Not Provided|
|Brief Title ICMJE||A Genetic Analysis of Usher Syndrome in Ashkenazi Jews|
|Official Title ICMJE||A Genetic Analysis of Usher Syndrome in Ashkenazi Jews|
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.
|Detailed Description||Not Provided|
|Study Type ICMJE||Observational|
|Study Design ICMJE||Observational Model: Defined Population
Observational Model: Natural History
|Target Follow-Up Duration||Not Provided|
|Sampling Method||Not Provided|
|Study Population||Not Provided|
|Study Group/Cohort (s)||Not Provided|
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Recruitment Status ICMJE||Completed|
|Enrollment ICMJE||Not Provided|
|Completion Date||February 2002|
|Primary Completion Date||Not Provided|
|Eligibility Criteria ICMJE||
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.
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.
|Accepts Healthy Volunteers||No|
|Contacts ICMJE||Contact information is only displayed when the study is recruiting subjects|
|Location Countries ICMJE||United States|
|NCT Number ICMJE||NCT00016471|
|Other Study ID Numbers ICMJE||NCRR-M01RR00071-0374|
|Has Data Monitoring Committee||Not Provided|
|Responsible Party||Not Provided|
|Study Sponsor ICMJE||National Center for Research Resources (NCRR)|
|Collaborators ICMJE||Not Provided|
|Investigators ICMJE||Not Provided|
|Information Provided By||National Center for Research Resources (NCRR)|
|Verification Date||November 2003|
ICMJE Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP