Related Experiment Videos
Genetics and phenotypes of RPE65 mutations in inherited retinal degeneration
D A Thompson1, P Gyürüs, L L Fleischer
1Departments of Ophthalmology and Visual Sciences and. Biological Chemistry, University of Michigan Medical School, Ann Arbor, USA. dathom@umich.edu
Investigative Ophthalmology & Visual Science
|November 30, 2000
Summary
Mutations in the RPE65 gene cause early-onset retinal degeneration. Characterizing these RPE65 mutations aids in understanding disease and developing future therapies for inherited retinal diseases.
Area of Science:
- Genetics
- Ophthalmology
- Molecular Biology
Background:
- Retinal dystrophy encompasses a group of inherited eye diseases.
- Mutations in the Retinal Pigment Epithelium Protein 65 (RPE65) gene are a known cause of inherited retinal diseases.
Purpose of the Study:
- To characterize the spectrum of RPE65 mutations in patients with retinal dystrophy.
- To understand the functional deficits caused by RPE65 sequence variants.
Main Methods:
- DNA from 453 patients was analyzed for RPE65 gene mutations using polymerase chain reaction (PCR), single-strand conformation polymorphism (SSCP), and direct sequencing.
- Clinical examinations and visual function tests were performed on patients.
Main Results:
- Twenty-one distinct disease-associated RPE65 mutations were identified in 20 patients.
- The IVS1+5g-->a splice site mutation was the most common, found in 22.5% of disease alleles.
- RPE65 mutations result in a relatively uniform phenotype, with most missense mutations causing loss of function.
Conclusions:
- RPE65 mutations account for 11.4% of disease alleles in patients with early-onset retinal degeneration.
- Characterizing RPE65 mutations is crucial for developing targeted therapies for retinal degeneration.