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Familial Exudative Vitreoretinopathy-Like Retinal Findings in Adams-Oliver Syndrome Type 2
You Wang1, Aohan Hou2, Wenjia Yan2
1Department of Ophthalmology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China.
Clinical & Experimental Ophthalmology
|July 30, 2025
Summary
Biallelic DOCK6 mutations cause familial exudative vitreoretinopathy (FEVR). This loss-of-function mechanism leads to severe ocular and systemic issues, emphasizing DOCK6 screening in FEVR patients.
Area of Science:
- Genetics
- Ophthalmology
- Molecular Biology
Background:
- Investigated DOCK6-associated autosomal recessive Adams-Oliver Syndrome in familial exudative vitreoretinopathy (FEVR) patients.
- Examined genotype-phenotype correlations in a large cohort.
Purpose of the Study:
- Determine the role of DOCK6 mutations in FEVR.
- Characterize clinical features and genetic basis of DOCK6-related FEVR.
Main Methods:
- Conducted comprehensive ocular examinations.
- Performed whole-exome sequencing (WES) and Sanger sequencing.
- Utilized in vitro experiments to validate mutations (CNV, splice-site).
Main Results:
- Identified biallelic pathogenic DOCK6 mutations in 7 of 642 FEVR families (1.09% prevalence).
- Discovered 13 mutation sites, suggesting DOCK6 pathogenic mechanism is loss-of-function.
- Observed severe ocular manifestations like total retinal detachment (35.71%) and retinal folds (28.57%).
Conclusions:
- Biallelic DOCK6 mutations are a genetic cause of FEVR.
- These mutations lead to loss of function, causing severe ocular and systemic symptoms.
- Recommends considering DOCK6 mutation screening for atypical or severe FEVR cases.
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