OPA1 Dominant Optic Atrophy: Diagnostic Approach in the Pediatric Population

Area of Science:

• Ophthalmology
• Genetics
• Pediatric Medicine

Background:

• Dominant optic atrophy is a hereditary condition affecting the optic nerve.
• Optic atrophy 1 (OPA1) gene mutations are a known cause of dominant optic atrophy.
• Understanding genotype-phenotype correlations is essential for accurate diagnosis and management.

Purpose of the Study:

• To investigate the genotype-phenotype correlation in pediatric patients with OPA1 mutations.
• To analyze clinical and genetic data within and between families.
• To identify novel OPA1 mutations.

Main Methods:

• Clinical examination of pediatric patients and relatives.
• Genetic sequencing of the OPA1 gene.
• Optical coherence tomography (OCT) for retinal layer thickness measurements.
• Visual acuity and visual field testing.

Main Results:

• Eleven pediatric patients with confirmed OPA1 mutations were studied.
• Reduced visual acuity and centrocecal scotoma were common findings.
• Seven different OPA1 mutations were identified, including one novel mutation (NM_130837.3: c.1406_1407del).
• Retinal nerve fiber layer, ganglion cell layer, and macular thickness were measured via OCT.

Conclusions:

• A genotype-phenotype correlation exists for OPA1 mutations.
• Early diagnosis of dominant optic atrophy is critical for patient management and genetic counseling.
• Identification of novel mutations expands the understanding of OPA1-related optic neuropathies.