Evidence map›Paper›PMID 21408222›Full record

ArticlePloS one2011

Placental growth factor contributes to micro-vascular abnormalization and blood-retinal barrier breakdown in diabetic retinopathy.

Laura Kowalczuk, Elodie Touchard, Samy Omri, Laurent Jonet, Christophe Klein, Fatemeh Valamanes, Marianne Berdugo, Pascal Bigey, Pascale Massin, Jean-Claude Jeanny and 1 more

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 39 papers.

0numbers the graph read from it
0cells of the map it votes in
39citing papers in PubMed
4.7field-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

39 citing papers in PubMed, 76 citations in OpenAlex.

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  12. VEGFR1 signaling in retinal angiogenesis and microinflammation.Progress in retinal and eye research · 2021
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  14. Pericyte-Endothelial Interactions in the Retinal Microvasculature.International journal of molecular sciences · 2020
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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

11 authors at 7 institutions in 1 country.

Laura KowalczukInstitut National pour la Santé Et la Recherche Médicale U872, Physiopathology of ocular diseases: Therapeutic innovations, Paris, France.
Elodie Touchard
Samy Omri
Laurent Jonet
Christophe Klein
Fatemeh Valamanes
Marianne Berdugo
Pascal Bigey
Pascale Massin
Jean-Claude Jeanny
Francine Behar-Cohen
Sorbonne Université · FRUniversité Paris Cité · FRAssistance Publique – Hôpitaux de Paris · FRCentre de Recherche des Cordeliers · FRChimie ParisTech · FRDélégation Paris 5 · FRInserm · FR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveThere are controversies regarding the pro-angiogenic activity of placental growth factor (PGF) in diabetic retinopathy (DR). For a better understanding of its role on the retina, we have evaluated the effect of a sustained PGF over-expression in rat ocular media, using ciliary muscle electrotransfer (ET) of a plasmid encoding rat PGF-1 (pVAX2-rPGF-1). MATERIALS AND

methodspVAX2-rPGF-1 ET in the ciliary muscle (200 V/cm) was achieved in non diabetic and diabetic rat eyes. Control eyes received saline or naked plasmid ET. Clinical follow up was carried out over three months using slit lamp examination and fluorescein angiography. After the control of rPGF-1 expression, PGF-induced effects on retinal vasculature and on the blood-external barrier were evaluated respectively by lectin and occludin staining on flat-mounts. Ocular structures were visualized through histological analysis.

resultsAfter fifteen days of rPGF-1 over-expression in normal eyes, tortuous and dilated capillaries were observed. At one month, microaneurysms and moderate vascular sprouts were detected in mid retinal periphery in vivo and on retinal flat-mounts. At later stages, retinal pigmented epithelial cells demonstrated morphological abnormalities and junction ruptures. In diabetic retinas, PGF expression rose between 2 and 5 months, and, one month after ET, rPGF-1 over-expression induced glial activation and proliferation.

conclusionThis is the first demonstration that sustained intraocular PGF production induces vascular and retinal changes similar to those observed in the early stages of diabetic retinopathy. PGF and its receptor Flt-1 may therefore be looked upon as a potential regulatory target at this stage of the disease.

Indexed as

AnimalsBlood-Retinal BarrierDiabetic RetinopathyFemaleFluorescein-5-isothiocyanateFluorescein AngiographyHumansImmunohistochemistryMaleMembranesMicrovesselsMiddle AgedPlacenta Growth FactorPregnancy ProteinsRatsRetinal VesselsFluorescein-5-isothiocyanatePGF protein, humanPgf protein, ratPlacenta Growth FactorPregnancy Proteins

Identifiers

PMID21408222
PMCPMC3049767
OpenAlexW2046765002

What OpenQuestion holds

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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.