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Clinicopathologic effects of mutant GUCY2D in Leber congenital amaurosis.

Abstract：

PURPOSE:To study the retinal degeneration in an 11 -year-old patient with Leber congenital amaurosis (LCA) caused by mutation in GUCY2D. STUDY DESIGN:Comparative human tissue study. PARTICIPANTS:Two subjects with LCA; postmortem eye from one LCA patient and three normal donors. METHODS:Clinical and visual function studies were performed between the ages of 6 and 10 years in the LCA eye donor and at age 6 in an affected sibling. Genomic DNA was screened for mutations in known LCA genes. The retina of the 11 -year-old subject with LCA was compared with normal retinas from donors age 3 days, 18 years, and 53 years. The tissues were processed for histopathologic studies and immunofluorescence with retinal cell-specific antibodies. RESULTS:Vision in both siblings at the ages examined was limited to severely impaired cone function. Mutation in the GUCY2D gene was identified in both siblings. Histopathologic study revealed rods and cones without outer segments in the macula and far periphery. The cones formed a monolayer of cell bodies, but the rods were clustered and had sprouted neurites in the periphery. Rods and cones were not identified in the midperipheral retina. The inner nuclear layer appeared normal in thickness throughout the retina, but ganglion cells were reduced in number. CONCLUSIONS:An 11-year-old subject with LCA caused by mutant GUCY2D had only light perception but retained substantial numbers of cones and rods in the macula and far periphery. The finding of numerous photoreceptors at this age may portend well for therapies designed to restore vision at the photoreceptor level.

journal_name

Ophthalmology

journal_title

Ophthalmology

authors

Milam AH,Barakat MR,Gupta N,Rose L,Aleman TS,Pianta MJ,Cideciyan AV,Sheffield VC,Stone EM,Jacobson SG

doi

10.1016/S0161-6420(02)01757-8

subject

Has Abstract

pub_date

2003-03-01 00:00:00

pages

549-58

issue

3

eissn

0161-6420

issn

1549-4713

pii

S0161-6420(02)01757-8

journal_volume

110

pub_type

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