Evidence map›Paper›PMID 21135502›Full record

ArticleThe Journal of clinical investigation2011

mTOR-mediated dedifferentiation of the retinal pigment epithelium initiates photoreceptor degeneration in mice.

Chen Zhao, Douglas Yasumura, Xiyan Li, Michael Matthes, Marcia Lloyd, Gregory Nielsen, Kelly Ahern, Michael Snyder, Dean Bok, Joshua L Dunaief and 2 more

Open access · bronzeAbstract read
In one paragraph

Article in The Journal of clinical investigation, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 225 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
225citing papers in PubMed, 2 pooled it
4.6field-weighted citation impact, top 5% 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

225 citing papers in PubMed, 2 syntheses or guidelines pooled it, 310 citations in OpenAlex.

  1. Guideline
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  8. Selective deletion ofiScience · 2026
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165 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

12 authors at 4 institutions in 1 country.

Chen ZhaoDepartment of Genetics, Stanford University School of Medicine, Stanford, California 94305-5120, USA.
Douglas Yasumura
Xiyan Li
Michael Matthes
Marcia Lloyd
Gregory Nielsen
Kelly Ahern
Michael Snyder
Dean Bok
Joshua L Dunaief
Matthew M LaVail
Douglas Vollrath
Stanford University · USDoheny Eye Institute · USPenn Presbyterian Medical Center · USUniversity of California, Los Angeles · US

Funding

Vision Research Core at UCLAP30EY000331 · NEI · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI Gregory Darin Field, DAVID S WILLIAMS · 1985 to 2026
$16.8M
Rapid-Prototyping and Design CoreP30EY002162 · NEI · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI LAKKARAJU, APARNA · 1985 to 2024
$16.8M
Retinal Iron Transport in Health and DiseaseR01EY015240 · NEI · UNIVERSITY OF PENNSYLVANIA · PI JOSHUA L DUNAIEF · 2004 to 2026
$10.4M
CELLULAR MECHANISMS OF INHERITED RETINAL DEGENERATIONR01EY001919 · NEI · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI LAVAIL, MATTHEW M · 1985 to 2014
$8.3M
RODENT MODELS OF RETINAL DEGENERATIONR01EY006842 · NEI · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI LAVAIL, MATTHEW M · 1992 to 2014
$3.6M
Genetic model of retinal pigment epithelium degenerationR03EY014650 · NEI · STANFORD UNIVERSITY · PI VOLLRATH, DOUGLAS E. · 2003 to 2005
$480k
CELLULAR MECHANISMS OF INHERITED RETINAL DEGENERATIONR37EY001919 · NEI · UNIVERSITY OF CALIFORNIA SAN FRANCISCO · PI LAVAIL, MATTHEW M · 1989 to 1998
–
NEI NIH HHS EY001919NEI NIH HHS EY00331NEI NIH HHS EY014650NEI NIH HHS EY015240NEI NIH HHS P30 EY000331NEI NIH HHS P30 EY002162NEI NIH HHS P30EY002162NEI NIH HHS R01 EY001919NEI NIH HHS R01 EY006842NEI NIH HHS R01 EY015240NEI NIH HHS R03 EY014650
6 · The paper itself

Abstract

Retinal pigment epithelial (RPE) cell dysfunction plays a central role in various retinal degenerative diseases, but knowledge is limited regarding the pathways responsible for adult RPE stress responses in vivo. RPE mitochondrial dysfunction has been implicated in the pathogenesis of several forms of retinal degeneration. Here we have shown that postnatal ablation of RPE mitochondrial oxidative phosphorylation in mice triggers gradual epithelium dedifferentiation, typified by reduction of RPE-characteristic proteins and cellular hypertrophy. The electrical response of the retina to light decreased and photoreceptors eventually degenerated. Abnormal RPE cell behavior was associated with increased glycolysis and activation of, and dependence upon, the hepatocyte growth factor/met proto-oncogene pathway. RPE dedifferentiation and hypertrophy arose through stimulation of the AKT/mammalian target of rapamycin (AKT/mTOR) pathway. Administration of an oxidant to wild-type mice also caused RPE dedifferentiation and mTOR activation. Importantly, treatment with the mTOR inhibitor rapamycin blunted key aspects of dedifferentiation and preserved photoreceptor function for both insults. These results reveal an in vivo response of the mature RPE to diverse stressors that prolongs RPE cell survival at the expense of epithelial attributes and photoreceptor function. Our findings provide a rationale for mTOR pathway inhibition as a therapeutic strategy for retinal degenerative diseases involving RPE stress.

Indexed as

AnimalsAutophagyCell DeathCell DedifferentiationCell MovementCell SurvivalFemaleGlycolysisHepatocyte Growth FactorHypertrophyMaleMiceMice, TransgenicOxidative PhosphorylationPhotoreceptor Cells, VertebrateProto-Oncogene Proteins c-aktHepatocyte Growth FactorHGF protein, mousemTOR protein, mouseProto-Oncogene Proteins c-aktProto-Oncogene Proteins c-metSirolimusTOR Serine-Threonine Kinases

Identifiers

PMID21135502
PMCPMC3007156
OpenAlexW2002712265

What OpenQuestion holds

Textmetadata
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.