EYS Mutations Causing Autosomal Recessive Retinitis Pigmentosa: Changes of Retinal Structure and Function with...

Area of Science:

• Ophthalmology
• Genetics
• Retinal Degeneration

Background:

• Mutations in the eyes shut homolog (EYS) gene are a frequent cause of autosomal recessive retinitis pigmentosa (arRP).
• A lack of mammalian models for EYS disease limits understanding of its clinical progression and disease expression.
• This study investigates the clinical characteristics and progression of retinal degeneration in patients with EYS mutations.

Purpose of the Study:

• To characterize the clinical features and disease progression in patients with EYS mutations.
• To compare the rate of progression of EYS-related retinitis pigmentosa with other forms of arRP.

Main Methods:

• Clinical examination and functional assessments including chromatic static perimetry.
• Structural imaging using spectral-domain optical coherence tomography (OCT) and en face autofluorescence.
• Longitudinal analysis of a cohort of 15 patients with EYS mutations.

Main Results:

• Rod sensitivity was measurable in most patients early in the disease, with some retaining function into their fifth decade.
• Central photoreceptor nuclear layer abnormalities were present in most patients at initial visits, except in the fovea.
• Progressive structural loss in the perifovea was followed by inner retinal changes and retinal pigment epithelial dysfunction.
• Preliminary analysis suggests EYS-related arRP progresses more rapidly than other ciliopathies like USH2A and MAK.

Conclusions:

• EYS mutations lead to a progressive form of retinitis pigmentosa with distinct structural and functional changes.
• The disease exhibits variability in severity but appears to progress more rapidly than other known causes of arRP.
• Further research into EYS-related disease mechanisms and therapeutic strategies is warranted.