ArticleInvestigative ophthalmology & visual science2022
Autofluorescent Organelles Within the Retinal Pigment Epithelium in Human Donor Eyes With and Without Age-Related Macular Degeneration.
Article in Investigative ophthalmology & visual science, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.
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Who cites it
18 citing papers in PubMed, 25 citations in OpenAlex.
- Near-Infrared Fluorescence Lifetime Imaging Microscopy Reveals Loss of RPE Cell Body Polarity in Age-Related Macular Degeneration.Investigative ophthalmology & visual science · 2026Article
- Total Retinal Pigment Epithelium Thickness and Reflectivity, in Relation to Histology and Vision, at the Aging-AMD Transition: ALSTAR2 Baseline.Investigative ophthalmology & visual science · 2025Article
- Super-Resolution Near-Infrared Autofluorescence Microscopy Depicts Melanin Containing Organelles of the Retinal Pigment Epithelium in Human Donor Eyes.Investigative ophthalmology & visual science · 2025Article
- Lack of Pnpla2 Accelerates Progression of AMD-Like Features in Mice.Investigative ophthalmology & visual science · 2025Article
- High-Resolution Imaging and Interpretation of Three-Dimensional RPE Sheet Structure.Biomolecules · 2025Article
- Nanosecond laser induces proliferation and improved cellular health within the retinal pigment epithelium.Frontiers in medicine · 2025Article
- Blue Light-Induced Accelerated Formation of Melanolipofuscin-Like Organelles in Japanese Quail RPE Cells: An Electron Microscopic Study.Investigative ophthalmology & visual science · 2024Article
- Multispectral label-freeJournal of biomedical optics · 2024Article
- Near Infrared Autofluorescence Lifetime Imaging of Human Retinal Pigment Epithelium Using Adaptive Optics Scanning Light Ophthalmoscopy.Investigative ophthalmology & visual science · 2024Article
- Impact of lens autofluorescence and opacification on retinal imaging.BMJ open ophthalmology · 2024Article
- Non-Neovascular Age-Related Macular Degeneration Assessment: Focus on Optical Coherence Tomography Biomarkers.Diagnostics (Basel, Switzerland) · 2024Review
- Retinal Pigment Epithelium Pigment Granules: Norms, Age Relations and Pathology.International journal of molecular sciences · 2024Review
- Age-Related Macular Degeneration, a Mathematically Tractable Disease.Investigative ophthalmology & visual science · 2024Review
- Spectral Analysis of Human Retinal Pigment Epithelium Cells in Healthy and AMD Eyes.Investigative ophthalmology & visual science · 2024Article
- Lipofuscin, Its Origin, Properties, and Contribution to Retinal Fluorescence as a Potential Biomarker of Oxidative Damage to the Retina.Antioxidants (Basel, Switzerland) · 2023Review
- Retest variability and patient reliability indices of quantitative fundus autofluorescence in age-related macular degeneration: a MACUSTAR study report.Scientific reports · 2023Article
- Histologic Cell Shape Descriptors for the Retinal Pigment Epithelium in Age-Related Macular Degeneration: A Comparison to Unaffected Eyes.Translational vision science & technology · 2022Article
- Association of Hyperautofluorescence Signals with Geographic Atrophy Progression in the METformin for the MINimization of Geographic Atrophy Progression Trial.Ophthalmology scienceArticle
Corrections and comments
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Authors and funding
9 authors at 5 institutions in 2 countries.
Funding
Abstract
Purpose: Human retinal pigment epithelium (RPE) cells contain lipofuscin, melanolipofuscin, and melanosome organelles that impact clinical autofluorescence (AF) imaging. Here, we quantified the effect of age-related macular degeneration (AMD) on granule count and histologic AF of RPE cell bodies. Methods: Seven AMD-affected human RPE-Bruch's membrane flatmounts (early and intermediate = 3, late dry = 1, and neovascular = 3) were imaged at fovea, perifovea, and near periphery using structured illumination and confocal AF microscopy (excitation 488 nm) and compared to RPE-flatmounts with unremarkable macula (n = 7, >80 years). Subsequently, granules were marked with computer assistance, and classified by their AF properties. The AF/cell was calculated from confocal images. The total number of granules and AF/cell was analyzed implementing a mixed effect analysis of covariance (ANCOVA). Results: A total of 152 AMD-affected RPE cells were analyzed (fovea = 22, perifovea = 60, and near-periphery = 70). AMD-affected RPE cells showed increased variability in size and a significantly increased granule load independent of the retinal location (fovea: P = 0.02, perifovea: P = 0.04, and near periphery: P < 0.01). The lipofuscin fraction of total organelles decreased and the melanolipofuscin fraction increased in AMD, at all locations (especially the fovea). AF was significantly lower in AMD-affected cells (fovea: <0.01, perifovea: <0.01, and near periphery: 0.02). Conclusions: In AMD RPE, lipofuscin was proportionately lowest in the fovea, a location also known to be affected by accumulation of soft drusen and preservation of cone-mediated visual acuity. Enlarged RPE cell bodies displayed increased net granule count but diminished total AF. Future studies should also assess the impact on AF imaging of RPE apical processes containing melanosomes.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.