Evidence map›Paper›PMID 32446621›Full record

ArticleRedox biology2020

Improving retinal mitochondrial function as a treatment for age-related macular degeneration.

Mara C Ebeling, Jorge R Polanco, Jun Qu, Chengjian Tu, Sandra R Montezuma, Deborah A Ferrington

Open access · goldAbstract read
In one paragraph

Article in Redox biology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 47 papers.

0numbers the graph read from it
0cells of the map it votes in
47citing papers in PubMed
5.2field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

47 citing papers in PubMed, 81 citations in OpenAlex.

  1. Article
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  6. B Vitamins and Ocular Health.Clinical ophthalmology (Auckland, N.Z.) · 2026
    Review
  7. Article
  8. Zinc in eye health, retinal biology and disease.Progress in retinal and eye research · 2025
    Review
  9. Article
  10. Article
  11. Review
  12. Review
  13. Review
  14. Article
  15. Article
  16. Alternative oxidase blunts pseudohypoxia and photoreceptor degeneration due to RPE mitochondrial dysfunction.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  17. Review
  18. Review
  19. Article
  20. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 2 institutions in 1 country.

Mara C EbelingDepartment of Ophthalmology and Visual Neurosciences, University of Minnesota, Minneapolis, MN, 55455, USA. Electronic address: ebeli017@umn.edu.
Jorge R PolancoDepartment of Ophthalmology and Visual Neurosciences, University of Minnesota, Minneapolis, MN, 55455, USA. Electronic address: polan070@umn.edu.
Jun QuDepartment of Pharmaceutical Sciences, SUNY Buffalo, Buffalo, NY, 14203, USA. Electronic address: junqu@buffalo.edu.
Chengjian TuDepartment of Pharmaceutical Sciences, SUNY Buffalo, Buffalo, NY, 14203, USA. Electronic address: chengjian.tu@thermofisher.com.
Sandra R MontezumaDepartment of Ophthalmology and Visual Neurosciences, University of Minnesota, Minneapolis, MN, 55455, USA. Electronic address: smontezu@umn.edu.
Deborah A FerringtonDepartment of Ophthalmology and Visual Neurosciences, University of Minnesota, Minneapolis, MN, 55455, USA. Electronic address: ferri013@umn.edu.
University of Minnesota · USUniversity at Buffalo, State University of New York · US

Funding

Mitochondrial defects in the retinal pigment epithelium and the CFH risk allele for age-related macular degenerationR01EY028554 · NEI · UNIVERSITY OF MINNESOTA · PI DUTTON, JAMES R., FERRINGTON, DEBORAH ANN · 2018 to 2025
$4.5M
Age-related macular degeneration,mitochondria and the CFH genotypeR01EY026012 · NEI · UNIVERSITY OF MINNESOTA · PI FERRINGTON, DEBORAH ANN · 2016 to 2019
$1.7M
NEI NIH HHS R01 EY026012NEI NIH HHS R01 EY028554
6 · The paper itself

Abstract

Age-related macular degeneration (AMD) is the leading cause of blindness among the elderly. Currently, there are no treatments for dry AMD, which is characterized by the death of retinal pigment epithelium (RPE) and photoreceptors. Reports from human donors with AMD suggest that RPE mitochondrial defects are a key event in AMD pathology. Thus, the most effective strategy for treating dry AMD is to identify compounds that enhance mitochondrial function and subsequently, preserve the RPE. In this study, primary cultures of RPE from human donors with (n = 20) or without (n = 8) AMD were used to evaluate compounds that are designed to protect mitochondria from oxidative damage (N-acetyl-l-cysteine; NAC), remove damaged mitochondria (Rapamycin), increase mitochondrial biogenesis (Pyrroloquinoline quinone; PQQ), and improve oxidative phosphorylation (Nicotinamide mononucleotide, NMN). Mitochondrial function measured after drug treatments showed an AMD-dependent response; only RPE from donors with AMD showed improvements. All four drugs caused a significant increase in maximal respiration (p < 0.05) compared to untreated controls. Treatment with Rapamycin, PQQ, or NMN significantly increased ATP production (p < 0.05). Only Rapamycin increased basal respiration (p < 0.05). Notably, robust responses were observed in only about 50% of AMD donors, with attenuated responses observed in the remaining AMD donors. Further, within the responders, individual donors exhibited a distinct reaction to each drug. Our results suggest drugs targeting pathways involved in maintaining healthy mitochondria can improve mitochondrial function in a select population of RPE from AMD donors. The unique response of individual donors to specific drugs supports the need for personalized medicine when treating AMD.

Indexed as

Macular DegenerationAgedHumansMitochondriaOxidative PhosphorylationOxidative StressRetinal Pigment EpitheliumAge-related macular degenerationMitochondrial functionNicotinamide mononucleotidePyrroloquinoline quinoneRapamycinRetinal pigment epithelium

Identifiers

PMID32446621
PMCPMC7327959
OpenAlexW3027071124

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

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.