Modeling ZNF408-Associated FEVR in Zebrafish Results in Abnormal Retinal Vasculature
Investigative Ophthalmology & Visual Science
|February 26, 2020
Summary
Mutations in ZNF408 cause familial exudative vitreoretinopathy (FEVR), a retinal vascular disease. Zebrafish models reveal ZNF408 is crucial for retinal vascular development and maintenance.
Area of Science:
- Ophthalmology
- Genetics
- Developmental Biology
Background:
- Familial exudative vitreoretinopathy (FEVR) is an inherited retinal disorder affecting peripheral retinal vasculature, potentially causing vision loss.
- A specific ZNF408 mutation was linked to autosomal dominant FEVR, but its molecular function in the disease remains unclear.
Purpose of the Study:
- To investigate the role of ZNF408 in retinal vascular development and its connection to FEVR.
- To create and analyze zebrafish models mimicking human ZNF408 mutations associated with FEVR.
Main Methods:
- CRISPR/Cas9 gene editing was used to generate zebrafish models with truncated or missense mutations in the znf408 gene.
- These models included homozygous truncated, heterozygous missense, and homozygous missense (p.His455Tyr) znf408 mutations.
Main Results:
- All znf408-mutant zebrafish exhibited progressive retinal vascular abnormalities.
- Early findings included deficient hyaloid vessel development and retinal vascular insufficiency.
- Later observations showed ectopic retinal vascular hyper-sprouting and significant vascular leakage.
Conclusions:
- ZNF408 plays a critical role in both the development and ongoing maintenance of the retinal vascular system.
- These findings provide insights into the molecular mechanisms underlying FEVR and highlight ZNF408 as a key gene in retinal vascular health.
