Structural disease progression in PDE6-associated autosomal recessive retinitis pigmentosa

Ophthalmic Genetics
Vitor K L TakahashiStephen H Tsang

Abstract

To evaluate the progression of retinitis pigmentosa (RP) caused by mutations in either PDE6A or PDE6B by measuring the progressive constriction of the hyperautofluorescent ring and shortening of the ellipsoid zone (EZ)-line width. Fundus autofluorescence (FAF) and spectral-domain optical coherence tomography (SD-OCT) images were obtained from seven patients with autosomal recessive RP caused by mutations in either PDE6A or PDE6B. Measurements of the EZ line width on SD-OCT images and horizontal, vertical diameter, and ring area on FAF images were performed by two independent graders. The measurements of these four parameters were correlated with one another. We observed that the EZ line width decreased by an average of 91 ± 64 µm per year, while the horizontal and vertical diameters decreased by 103 ± 53 µm and 92 ± 49 µm per year, respectively. The ring area decreased by a rate of 0.3 ± 0.18 mm2 per year. Progression rates were similar for the left eye. We observed a progressive loss of EZ line width and Short-wavelength fundus autofluorescence (SW-AF) ring constriction over time. These results may serve as reference for better prognostic prediction and patients selection for clinical trials promoting cone rescue.

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Citations

May 11, 2019·Investigative Ophthalmology & Visual Science·Laurence H M PierracheL Ingeborgh van den Born
Apr 2, 2020·Expert Opinion on Orphan Drugs·Moreno MenghiniRobert E MacLaren
Sep 11, 2019·Pharmaceuticals·Daniel Pérez-PérezRoxana Magaña-Maldonado
Oct 14, 2020·Ophthalmic Genetics·Juanita PappalardoFred K Chen
Mar 7, 2021·International Journal of Molecular Sciences·Laura KuehleweinSusanne Kohl
Sep 30, 2021·International Ophthalmology Clinics·Séverine Marconi, John T Stout

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