NDLI: Autofluorescence Lifetimes in Patients With Choroideremia Identify Photoreceptors in Areas With Retinal Pigment Epithelium Atrophy.

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Autofluorescence Lifetimes in Patients With Choroideremia Identify Photoreceptors in Areas With Retinal Pigment Epithelium Atrophy.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Zinkernagel, Martin S. Dysli, Chantal Tran, Hoai Viet Wolf, Sebastian
Description	Country affiliation: Switzerland Author Affiliation: Dysli C ( Departments of Ophthalmology and Clinical Research, Inselspital, Bern University Hospital, University of Bern, Switzerland.); Wolf S ( Departments of Ophthalmology and Clinical Research, Inselspital, Bern University Hospital, University of Bern, Switzerland.); Tran HV ( Department of Ophthalmology, Jules-Gonin Eye Hospital, University of Lausanne, Lausanne, Switzerland.); Zinkernagel MS ( Departments of Ophthalmology and Clinical Research, Inselspital, Bern University Hospital, University of Bern, Switzerland.)
Abstract	Purpose: The purpose of this study was to investigate fundus autofluorescence lifetimes in patients with choroideremia and to identify tissue-specific lifetime characteristics and potential prognostic markers. Methods: Autofluorescence lifetimes of the retina were measured in two spectral channels (498-560 nm and 560-720 nm) in patients with choroideremia and age-matched healthy controls. Furthermore, autofluorescence intensities and spectral-domain optical coherence tomography (OCT) data were acquired and compared to fundus autofluorescence lifetime data. Results: Sixteen eyes from 8 patients with advanced choroideremia (mean ± SD age, 55 ± 13 years) were included in this study and compared with 10 age-matched healthy participants. Whereas fundus autofluorescence intensity measurement identified areas of remaining retinal pigment epithelium (RPE), autofluorescence lifetime maps identified areas with remaining photoreceptor layers in OCT but RPE atrophy. In these areas, mean (±SEM) lifetimes were 567 ± 59 ps in the short and 603 ± 49 ps in the long spectral channels (+98% and +88% compared to controls). In areas of combined RPE atrophy and loss of photoreceptors, autofluorescence lifetimes were significantly prolonged by 1116 ± 63 ps (+364%) in the short and by 915 ± 52 ps (+270%) in the long spectral channels compared with controls. Conclusions: Because autofluorescence lifetimes identify areas of remaining photoreceptors in the absence of RPE, this imaging modality may be useful to monitor disease progression in the natural course of disease and in context of potential future therapeutic interventions.
ISSN	01460404
e-ISSN	15525783
Journal	Investigative Opthalmology & Visual Science
Issue Number	15
Volume Number	57
Language	English
Publisher	Association for Research in Vision and Ophthalmology
Publisher Date	2016-12-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Discipline Ophthalmology
Content Type	Text
Resource Type	Article
Subject	Ophthalmology Sensory Systems Cellular and Molecular Neuroscience

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