Related Experiment Video
Updated: May 20, 2026
Ex Vivo OCT-Based Multimodal Imaging of Human Donor Eyes for Research into Age-Related Macular Degeneration
Published on: May 26, 2023
Noninvasive imaging of mitochondrial dysfunction in dry age-related macular degeneration
Matthew G Field1, Grant M Comer, Takahiro Kawaji
1Departments of Ophthalmology and Visual Sciences, University of Michigan, Ann Arbor, Michigan 48105, USA.
Background And Objective:
Oxidative stress and mitochondrial dysfunction are implicated in the pathogenesis of age-related macular degeneration (AMD). Because increased flavoprotein fluorescence (FPF) is indicative of mitochondrial dysfunction, the authors attempted to detect mitochondrial dysfunction in eyes with AMD using FPF.
Patients And Methods:
Six nonexudative eyes with AMD, including three with geographic atrophy (GA), and age-matched control eyes were imaged with a FPF device. Qualitative and quantitative analyses were conducted on the FPF images.
Results:
Five eyes with AMD, including all three eyes with GA, showed qualitative and/or quantitative FPF heterogeneity that was not present in control eyes. Mean FPF average intensities of eyes with AMD with (P = .044) and without (P = .00060) GA were significantly greater than those of control eyes. The standard deviations of FPF images were greater in eyes with AMD (P = .020).
Conclusion:
In this small cluster of patients with AMD, retinal FPF is increased, suggesting elevated mitochondrial dysfunction. FPF heterogeneity indicates that an increased variability in mitochondrial dysfunction seems to be present in eyes with advanced disease.
Insights
Flavoprotein fluorescence (FPF) detects mitochondrial dysfunction in age-related macular degeneration (AMD). Increased FPF and heterogeneity in AMD eyes suggest elevated mitochondrial dysfunction, particularly in advanced disease.
Area of Science:
- Ophthalmology
- Cellular Biology
- Biochemistry
Background:
- Oxidative stress and mitochondrial dysfunction are key factors in age-related macular degeneration (AMD) pathogenesis.
- Increased flavoprotein fluorescence (FPF) serves as a biomarker for mitochondrial dysfunction.
Purpose of the Study:
- To investigate the utility of FPF in detecting mitochondrial dysfunction in eyes affected by AMD.
- To assess FPF levels and heterogeneity in AMD patients compared to controls.
Main Methods:
- Utilized a specialized FPF device to image six nonexudative AMD eyes (three with geographic atrophy) and age-matched controls.
- Performed qualitative and quantitative analyses on the acquired FPF images.
Main Results:
- Five out of six AMD eyes exhibited FPF heterogeneity, absent in control eyes.
- Significantly elevated mean FPF intensities were observed in AMD eyes, both with and without geographic atrophy (P = .044 and P = .00060, respectively).
- AMD eyes demonstrated greater standard deviations in FPF images (P = .020), indicating increased variability.
Conclusions:
- Retinal FPF is elevated in AMD patients, indicating heightened mitochondrial dysfunction.
- FPF heterogeneity suggests a variable degree of mitochondrial dysfunction, more pronounced in advanced AMD stages.
