Summary

for people ages 4 years and up (full criteria)
at La Jolla, California and other locations
study started
estimated completion:

Description

Summary

Background: Genes are the basic units of heredity. When genes are changed, certain cells don t work like they should. Researchers want to try to better understand the genetic conditions that are linked with inherited eye diseases. Objective: To try to identify the genes linked to the development of inherited eye diseases. Eligibility: People ages 4 and older who have or have a family member with an inherited eye disease Design: Participants will be screened with medical history and medical records. Participants will have one visit that will take 3 4 hours. This will include: Medical and family history Eye exam: This includes the pupil being dilated. Electroretinography: A small electrode is taped to the forehead. Participants sit in the dark with their eyes patched for 30 minutes. Then numbing drops and contact lenses are put in the eyes. They will watch flashing lights. Blood tests Saliva sample: They will spit into a container or have the inside of their cheek swabbed. Genetic testing will be done on participants blood or saliva. Participants may meet with the researchers to discuss their genetic tests.

Details

Objective: This project, Clinical and Molecular Studies in Families with Inherited Eye Disease will study inherited eye diseases, both Mendelian and complex age related inherited eye diseases, in families of many nationalities and ethnic backgrounds in order to identify the genes that, when mutated, cause inherited eye diseases and the pathophysiology through which they act. Among the diseases studied will be cataracts, corneal dystrophies and other corneal diseases, retinal degenerations, myopia and other anterior chamber defects, and glaucoma.

Study Population: Families and individuals of many nationalities and ethnic backgrounds. We will study a maximum of 5,000 patients and family members.

Design: The study consists of ascertaining individuals and especially families with multiple individuals, affected by both congenital and age related inherited eye diseases. These patients and their families will undergo detailed ophthalmological examinations to characterize their visual system and determine their affectation status. A blood sample will be collected from each individual for isolation of DNA and in some individuals for lymphoblastoid transformation to establish a renewable source of DNA. Linkage analysis, association analysis, physical mapping, and mutational screening will be carried out to identify the specific gene and the mutations in it that are associated with inherited eye disease in the family. Mutation screening may involve Sanger sequencing if a small number of candidate genes are identified, or whole genome or whole exome sequencing if more genes remain as viable candidates after the initial analysis. If necessary, the gene product will be characterized biochemically. The study will enroll participants at NEI and collaborating institutions.

Outcome Measures: Linkage will be determined using the lod score method, association will be determined using standard statistical procedures to estimate p values, and mutations in specific genes will be assessed using a combination of residue conservation, blosum score, bioinformatic prediction of structural damage to the protein, and molecular modeling. Assessment of biochemical, metabolic, and physiological effects of these mutations will be individualized to the specific case.

Keywords

Inherited Eye Disease Eye Diseases

Eligibility

You can join if…

Open to people ages 4 years and up

  1. Individuals or family members of individuals with inherited eye diseases, either congenital, childhood, or age related.
  2. Adults must be capable of providing their own consent.
  3. All subjects must be able to cooperate with study examination and phlebotomy.
  4. 4 years of age or older.

You CAN'T join if...

  1. Diseases, infections, or trauma that mimic inherited cataracts, retinal degenerations,glaucoma, etc.
  2. Children requiring sedation for study procedures.

Locations

  • University of California, San Diego accepting new patients
    La Jolla California 92093-0603 United States
  • University of California, Los Angeles accepting new patients
    Los Angeles California 90095 United States

Details

Status
accepting new patients
Start Date
Completion Date
(estimated)
Sponsor
National Eye Institute (NEI)
Links
NIH Clinical Center Detailed Web Page
ID
NCT02771236
Study Type
Observational
Last Updated
August 8, 2018