Evidence map›Paper›PMID 28458506›Full record

ArticleMolecular vision2017

Intraperitoneal injection of (-)-Epigallocatechin-3-gallate protects against light-induced photoreceptor degeneration in the mouse retina.

Shounan Qi, Chenguang Wang, Delu Song, Ying Song, Joshua L Dunaief

Open access · greenAbstract read
In one paragraph

Article in Molecular vision, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
1.6field-weighted citation impact, top 17% 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

13 citing papers in PubMed, 22 citations in OpenAlex.

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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

5 authors at 1 institution in 2 countries.

Shounan QiDepartment of Ophthalmology, The Second Hospital of Jilin University, Jilin, China.
Chenguang WangDepartment of Ophthalmology, The Second Hospital of Jilin University, Jilin, China.
Delu SongF. M. Kirby Center for Molecular Ophthalmology, Scheie Eye Institute, University of Pennsylvania, Philadelphia, Pennsylvania.
Ying SongF. M. Kirby Center for Molecular Ophthalmology, Scheie Eye Institute, University of Pennsylvania, Philadelphia, Pennsylvania.
Joshua L DunaiefF. M. Kirby Center for Molecular Ophthalmology, Scheie Eye Institute, University of Pennsylvania, Philadelphia, Pennsylvania.
Penn Presbyterian Medical Center · US

Funding

Scientific TransparencyP30EY001583 · NEI · UNIVERSITY OF PENNSYLVANIA · PI Qi N Cui · 1985 to 2026
$19.5M
NEI NIH HHS P30 EY001583
6 · The paper itself

Abstract

purpose(-)-epigallocatechin-3-gallate (EGCG), a major catechin component of green tea, is reported to delay or prevent certain forms of cancer, arthritis, cardiovascular disease, and neurodegenerative disorders. In this study, we determined if systemically administered EGCG could protect the retina against light damage (LD) in mice.

methodsBALB/cJ mice were treated with either EGCG or saline via intraperitoneal (IP) injection, and then placed under constant cool white light-emitting diode (LED) light (10,000 lux) for 5 h. Retinal structure and function were evaluated using optical coherence tomography (OCT), histology, and electroretinography (ERG) 7 days after LD. In addition, the mRNAs of several oxidative stress genes were quantified by qPCR before LD and 24 h after LD.

resultsOCT and photomicrographs of mouse retinas showed morphologic protection of photoreceptors. Mice in the EGCG group had significantly higher ERG amplitudes for all three wave types compared with mice in the saline control group, which indicated that EGCG protected retinal function. Furthermore, qPCR results showed that EGCG administration can increase the mRNA level of the antioxidant gene

conclusionsThe IP injection of EGCG attenuated the detrimental effects of bright light on the retinas of BALB/cJ mice by protecting the structure and function of the retina.

Indexed as

AnimalsAntioxidantsCatechinElectroretinographyInjections, IntraperitonealLightMaleMiceMice, Inbred BALB COxidative StressPhotoreceptor Cells, VertebrateRadiation Injuries, ExperimentalReal-Time Polymerase Chain ReactionRetinaRetinal DegenerationRNA, MessengerAntioxidantsCatechinepigallocatechin gallateRNA, MessengerSuperoxide DismutaseSuperoxide Dismutase 2

Identifiers

PMID28458506
PMCPMC5367892
OpenAlexW2755592030

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.