Fluorescence characteristics of lipofuscin fluorophores from human retinal pigment epithelium
نویسندگان
چکیده
منابع مشابه
In vivo fluorescence of the ocular fundus exhibits retinal pigment epithelium lipofuscin characteristics.
PURPOSE To characterize the intrinsic fluorescence (autofluorescence) of the human ocular fundus with regard to its excitation and emission spectra, age relationship, retinal location, and topography, and to identify the dominant fluorophore among the fundus layers. METHODS Using a novel fundus spectrophotometer, fluorescence measurements were made at 7 degrees temporal to the fovea and at th...
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The life history of melanin and lipofuscin granules of human retinal pigment epithelium (RPE) was studied in 30 human eyes spanning nine decades of life. Autofluorescent granules in the cytoplasm of eye over 30 years of age were shown, ultrastructurally and through lipid solvent extraction, to be lipofuscin granules. Sparse small fluorescent granules in infant eyes were secondary lysosomes cont...
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Age-related macular degeneration, a major cause of blindness for which no satisfactory treatments exist, leads to a gradual decrease in central high acuity vision. The accumulation of fluorescent materials, called lipofuscin, in retinal pigment epithelial cells of the aging retina is most pronounced in the macula. One of the fluorophores of retinal pigment epithelial lipofuscin has been charact...
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There is a growing body of evidence that the nondegradable fluorophores that accumulate as the lipofuscin of retinal pigment epithelium (RPE) are involved in mechanisms leading to the degeneration of RPE in macular degeneration. Most of the constituents of RPE lipofuscin are inadvertent products of the retinoid visual cycle, the enzymatic pathway by which the 11-cis-retinal chromophore of rhodo...
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ژورنال
عنوان ژورنال: Photochemical & Photobiological Sciences
سال: 2020
ISSN: 1474-905X,1474-9092
DOI: 10.1039/c9pp00406h