Evidence map›Paper›PMID 33923192›Full record

ReviewAntioxidants (Basel, Switzerland)2021

Glutathione Metabolism and the Novel Role of Mitochondrial GSH in Retinal Degeneration.

Parameswaran G Sreekumar, Deborah A Ferrington, Ram Kannan

Open access · goldAbstract readReview
In one paragraph

Review in Antioxidants (Basel, Switzerland), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 63 papers.

0numbers the graph read from it
0cells of the map it votes in
63citing papers in PubMed
9.7field-weighted citation impact, top 1% 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

63 citing papers in PubMed, 101 citations in OpenAlex.

  1. Article
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  15. Nose-to-brain drug delivery: from bench to bedside.Translational neurodegeneration · 2025
    Review
  16. Article
  17. Review
  18. PARP inhibition preserves cone photoreceptors in rd2 retina.Acta neuropathologica communications · 2025
    Article
  19. Article
  20. Review

3 more citing papers are in PubMed but not listed here.

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

3 authors at 2 institutions in 1 country.

Parameswaran G SreekumarThe Stephen J. Ryan Initiative for Macular Research (RIMR), Doheny Eye Institute, Los Angeles, CA 90033, USA.
Deborah A FerringtonDepartment of Ophthalmology and Visual Neurosciences and Stem Cell Institute, University of Minnesota, Minneapolis, MN 55455, USA.
Ram KannanThe Stephen J. Ryan Initiative for Macular Research (RIMR), Doheny Eye Institute, Los Angeles, CA 90033, USA.
Doheny Eye Institute · USUniversity of Minnesota · 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
Novel Mechanisms of Subretinal Fibrosis in Age-related Macular DegenerationR01EY030141 · NEI · DOHENY EYE INSTITUTE · PI KANNAN, RAM · 2020 to 2023
$1.5M
NEI NIH HHS EY30141NEI NIH HHS R01 EY026012NEI NIH HHS R01 EY028554NIH HHS EY026012NIH HHS EY028554
6 · The paper itself

Abstract

Glutathione (GSH) is present ubiquitously, and its role as a crucial cellular antioxidant in tissues, including the retina, is well established. GSH's antioxidant function arises from its ability to scavenge reactive oxygen species or to serve as an essential cofactor for GSH S-transferases and peroxidases. This review summarizes the general functions, retinal distribution, disorders linked to GSH deficiency, and the emerging role for mitochondrial GSH (mGSH) in retinal function. Though synthesized only in the cytosol, the presence of GSH in multiple cell organelles suggests the requirement for its active transport across organellar membranes. The localization and distribution of 2-oxoglutarate carrier (OGC) and dicarboxylate carrier (DIC), two recently characterized mitochondrial carrier proteins in RPE and retina, show that these transporters are highly expressed in human retinal pigment epithelium (RPE) cells and retinal layers, and their expression increases with RPE polarity in cultured cells. Depletion of mGSH levels via inhibition of the two transporters resulted in reduced mitochondrial bioenergetic parameters (basal respiration, ATP production, maximal respiration, and spare respiratory capacity) and increased RPE cell death. These results begin to reveal a critical role for mGSH in maintaining RPE bioenergetics and cell health. Thus, augmentation of mGSH pool under GSH-deficient conditions may be a valuable tool in treating retinal disorders, such as age-related macular degeneration and optic neuropathies, whose pathologies have been associated with mitochondrial dysfunction.

Indexed as

bioenergeticsmitochondrial GSHretinal degenerationRPESLC25A10 (DIC)SLC25A11 (OGC)

Identifiers

PMID33923192
PMCPMC8146950
OpenAlexW3157032742

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.