Evidence map›Paper›PMID 27440994›Full record

ArticleMolecular vision2016

GLUT1 activity contributes to the impairment of PEDF secretion by the RPE.

Sofia M Calado, Liliana S Alves, Sónia Simão, Gabriela A Silva

Registry-linked trialOpen access · greenAbstract read
In one paragraph

Article in Molecular vision, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT04242082 (Role of Glucose Transporter), which is not on this map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
1.8field-weighted citation impact, top 15% 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.

NCT04242082 unknown statusnot on this mapstarted 2020, after this paper: background citation

Role of Glucose Transporter (GLUT) Genes Expression in Patients With Psoriasis

TypeobservationalSponsorAssiut UniversityRan2020 to 2021Enrolled75ConditionsPsoriasis VulgarisArmsGLUT 1 gene expression
3 · Its place in the literature

Who cites it

16 citing papers in PubMed, 28 citations in OpenAlex.

  1. Pigment Epithelium-Derived Factor (PEDF)-Based Therapy Induced Photoreceptor Survival by Stabilizing Choroidal Neovessels in a VEGF Overexpression CNV Rat Model.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2025
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  4. GLUT1 production in cancer cells: a tragedy of the commons.NPJ systems biology and applications · 2022
    Article
  5. Polyphenol Metabolite Pyrogallol-International journal of molecular sciences · 2021
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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

4 authors at 1 institution in 1 country.

Sofia M CaladoPhD Program in Biomedical Sciences, Department of Biomedical Sciences and Medicine, University of Algarve, Campus Gambelas, Faro, Portugal; CEDOC, NOVA Medical School | Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Campo Mártires da Pátria, Lisboa, Portugal.
Liliana S AlvesCEDOC, NOVA Medical School | Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Campo Mártires da Pátria, Lisboa, Portugal; ProRegeM PhD Program, NOVA Medical School/Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Campo Mártires da Pátria, Lisboa, Portugal.
Sónia SimãoCEDOC, NOVA Medical School | Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Campo Mártires da Pátria, Lisboa, Portugal; Centre for Biomedical Research (CBMR), University of Algarve, Campus Gambelas, Faro, Portugal.
Gabriela A SilvaCEDOC, NOVA Medical School | Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Campo Mártires da Pátria, Lisboa, Portugal.
Universidade Nova de Lisboa · PT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeIn this study, we aimed to understand whether glucose transporter 1 (GLUT1) activity affects the secretion capacity of antiangiogenic factor pigment epithelium-derived factor (PEDF) by the RPE cells, thus explaining the reduction in PEDF levels observed in patients with diabetic retinopathy (DR).

methodsAnalysis of GLUT1 expression, localization, and function was performed in vitro in RPE cells (D407) cultured with different glucose concentrations, corresponding to non-diabetic (5 mM of glucose) and diabetic (25 mM of glucose) conditions, further subjected to normoxia or hypoxia. The expression of PEDF was also evaluated in the secretome of the cells cultured in these conditions. Analysis of GLUT1 and PEDF expression was also performed in vivo in the RPE of Ins2(Akita) diabetic mice and age-matched wild-type (WT) controls.

resultsWe observed an increase in GLUT1 under hypoxia in a glucose-dependent manner, which we found to be directly associated with the translocation and stabilization of GLUT1 in the cell membrane. This stabilization led to an increase in glucose uptake by RPE cells. This increase was followed by a decrease in PEDF expression in RPE cells cultured in conditions that simulated DR. Compared with non-diabetic WT mice, the RPE of Ins2(Akita) mice showed increased GLUT1 overexpression with a concomitant decrease in PEDF expression.

conclusionsCollectively, our data show that expression of GLUT1 is stimulated by hyperglycemia and low oxygen supply, and this overexpression was associated with increased activity of GLUT1 in the cell membrane that contributes to the impairment of the RPE secretory function of PEDF.

Indexed as

AnimalsBlotting, WesternCells, CulturedDiabetes Mellitus, ExperimentalDiabetic RetinopathyEye ProteinsFluorescent Antibody Technique, IndirectGlucoseGlucose Transporter Type 1HumansHypoxiaMaleMiceMice, Inbred C57BLNerve Growth FactorsPigment Epithelium-Derived FactorEye ProteinsGlucoseGlucose Transporter Type 1Nerve Growth FactorsPigment Epithelium-Derived FactorSerpinsSLC2A1 protein, humanSlc2a1 protein, mouse

Identifiers

PMID27440994
PMCPMC4943856
OpenAlexW2491536686

What OpenQuestion holds

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LicenceCC BY-NC-ND
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Registered trials

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.