Evidence map›Paper›PMID 18191123›Full record

ArticleExperimental eye research2008

Exacerbation of retinal degeneration in the absence of alpha crystallins in an in vivo model of chemically induced hypoxia.

Jennifer Yaung, Ram Kannan, Eric F Wawrousek, Christine Spee, Parameswaran G Sreekumar, David R Hinton

Open access · greenAbstract read
In one paragraph

Article in Experimental eye research, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 40 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
40citing papers in PubMed, 1 pooled it
0.9field-weighted citation impact, top 27% 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

40 citing papers in PubMed, 1 synthesis or guideline pooled it, 67 citations in OpenAlex.

  1. Pooled it
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  17. Therapeutic potential of α-crystallin.Biochimica et biophysica acta · 2016
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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 3 institutions in 1 country.

Jennifer YaungDepartment of Pathology, Keck School of Medicine at the University of Southern California, Los Angeles, CA 90033, USA.
Ram Kannan
Eric F Wawrousek
Christine Spee
Parameswaran G Sreekumar
David R Hinton
Doheny Eye Institute · USUniversity of Southern California · USNational Eye Institute · US

Funding

VISION RESEARCHP30EY003040 · NEI · DOHENY EYE INSTITUTE · PI SUN, DEMING · 1985 to 2013
$7.0M
EXPERIMENTAL APPROACH TO MACULOPATHYR01EY001545 · NEI · UNIVERSITY OF SOUTHERN CALIFORNIA · PI HINTON, DAVID R. · 1985 to 2016
$6.0M
RPE CELL IN PROLIFERATIVE VITREORETINOPATHYR01EY002061 · NEI · UNIVERSITY OF SOUTHERN CALIFORNIA · PI RYAN, STEPHEN J · 1985 to 2006
$2.2M
Genetically altered mice to study ocular function and pathologyZ01EY000286 · NEI · NATIONAL EYE INSTITUTE · PI WAWROUSEK, ERIC · 1993 to 2008
$1.2M
NEI NIH HHS EY 02061NEI NIH HHS EY 03040NEI NIH HHS P30 EY003040NEI NIH HHS R01 EY001545NEI NIH HHS R01 EY002061
6 · The paper itself

Abstract

This study evaluated the role of crystallins in retinal degeneration induced by chemical hypoxia. Wild-type, alphaA-crystallin (-/-), and alphaB-crystallin (-/-) mice received intravitreal injection of 12 nmol (low dose), 33 nmol (intermediate dose) or 60 nmol (high dose) cobalt chloride (CoCl(2)). Hematoxylin and eosin and TdT-mediated dUTP nick-end labeling (TUNEL) stains were performed after 24 h, 96 h, and 1 week post-injection, while immunofluorescent stains for alphaA- and alphaB-crystallin were performed 1 week post-injection. The in vitro effects of CoCl(2) on alphaB-crystallin expression in ARPE-19 cells were determined by real time RT-PCR, Western blot, and confocal microscopy and studies evaluating subcellular distribution of alphaB-crystallin in the mitochondria and cytosol were also performed. Histologic studies revealed progressive retinal degeneration with CoCl(2) injection in wild-type mice. Retinas of CoCl(2) injected mice showed transient increased expression of HIF-1alpha which was maximal 24h after injection. Intermediate-dose CoCl(2) injection was associated with increased retinal immunofluorescence for both alphaA- and alphaB-crystallin; however, after high-dose injection, increased retinal degeneration was associated with decreased levels of crystallin expression. Injection of CoCl(2) at either intermediate or high dose in alphaA-crystallin (-/-) and alphaB-crystallin (-/-) mice resulted in much more severe retinal degeneration compared to wild-type eyes. A decrease in ARPE-19 total and cytosolic alphaB-crystallin expression with increasing CoCl(2) treatment and an increase in mitochondrial alphaB-crystallin were found. We conclude that lack of alpha-crystallins accentuates retinal degeneration in chemically induced hypoxia in vivo.

Indexed as

Disease Models, Animalalpha-Crystallin B Chainalpha-CrystallinsAnimalsApoptosisCells, CulturedDisease ProgressionMiceMice, KnockoutMitochondriaPigment Epithelium of EyeRetinal DegenerationReverse Transcriptase Polymerase Chain Reactionalpha-Crystallin B Chainalpha-Crystallins

Identifiers

PMID18191123
PMCPMC2731668
OpenAlexW2018842299

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.