Retinal dysfunction characterizes subtypes of dominant optic atrophy

Maria Lucia Cascavilla, V Parisi, Giacinto Triolo, L Ziccardi, Enrico Borrelli, A Di Renzo, Nicole Balducci, C Lamperti, S Bianchi Marzoli, Fatima Darvizeh, AA Sadun, V Carelli, F Bandello, Piero Barboni

Research output: Contribution to journalArticlepeer-review

Abstract

Purpose: To assess preganglionic retinal function usin g multifocal electroretinogram (mfERG) in patients affected by dominant optic atrophy (DOA) stratified by OPA1 gene mutation. Methods: Multifocal electroretinogram (mfERG) was recorded in 18 DOA patients (DOA group, 35 eyes) and 25 age-matched healthy subjects (control group, 25 eyes). Patients were stratified in two groups based on gene mutation: missense mutation (DOA-M group, 11 eyes) and mutation causing haploinsufficiency (DOA-H group, 24 eyes). The mfERG N1-P1 response amplitude density (RAD) has been evaluated in five annular retinal areas with different eccentricity from the fovea (ring 1: 0-5 degrees, R1; ring 2: 5-10 degrees, R2; ring 3: 10-15 degrees, R3; ring 4: 15-20 degrees, R4; and ring 5: 20-25 degrees, R5) and in eight sectors on the basis of the retinal topography: temporal-superior (TS), temporal-inferior (TI), nasal-superior (NS) and nasal-inferior (NI), temporal (T), superior (S), nasal (N) and inferior (I). Results: Compared to controls, DOA group revealed a significant reduction in N1-P1 RADs values in R1-R4 rings and in TI, NS and N sectors [analysis of variance (ANOVA), p < 0.01). DOA-M group showed a significant reduction in N1-P1 RADs values in R1-R5 rings and in TI, NS, NI, T, N and I sectors (p < 0.01). Dominant optic atrophy-H (DOA-H) group displayed only a significant (p < 0.01) reduction in N1-P1 RADs values, exclusively in R1 and in the NS sector. Conclusion: Preganglionic retinal impairment occurs in DOA with a clear genotype to retinal dysfunction association. Missense mutations are characterized by a far more severe functional impairment. © 2017 Acta Ophthalmologica Scandinavica Foundation
Original languageEnglish
Pages (from-to)e156-e163
Number of pages8
JournalActa Ophthalmologica
Volume96
Issue number2
DOIs
Publication statusPublished - 2018

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