Evidence map›Paper›PMID 19797052›Full record

ArticleThe Journal of biological chemistry2009

Active NF-E2-related factor (Nrf2) contributes to keep endothelial NO synthase (eNOS) in the coupled state: role of reactive oxygen species (ROS), eNOS, and heme oxygenase (HO-1) levels.

Elke H Heiss, Daniel Schachner, Ernst R Werner, Verena M Dirsch

Open access · hybridAbstract read
In one paragraph

Article in The Journal of biological chemistry, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 45 papers.

0numbers the graph read from it
0cells of the map it votes in
45citing papers in PubMed
2.2field-weighted citation impact, top 13% 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

45 citing papers in PubMed, 87 citations in OpenAlex.

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  7. Edible mushroom (Anatomy & cell biology · 2024
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  8. Insulin and aging - a disappointing relationship.Frontiers in endocrinology · 2023
    Review
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  14. Bardoxolone methyl: drug development for diabetic kidney disease.Clinical and experimental nephrology · 2020
    Review
  15. Interaction Between NOS3 and HMOX1 on Antihypertensive Drug Responsiveness in Preeclampsia.Revista brasileira de ginecologia e obstetricia : revista da Federacao Brasileira das Sociedades de Ginecologia e Obstetricia · 2020
    Article
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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 2 institutions in 1 country.

Elke H HeissDepartment of Pharmacognosy, University of Vienna, 1090 Vienna, Austria. elke.heiss@univie.ac.at
Daniel Schachner
Ernst R Werner
Verena M Dirsch
University of Vienna · ATInnsbruck Medical University · AT

Funding

Austrian Science Fund FWF P 19764
6 · The paper itself

Abstract

The aim of our study was to examine in detail the impact of NF-E2-related factor (Nrf2) activation on endothelial cell function with focus on redox homeostasis and the endothelial nitric oxide synthase (eNOS) system. We administered 2-cyano-3,12-dioxooleana-1,9-dien-28-oic imidazolide (CDDO-IM), a known activator of Nrf2, to primary human umbilical vein endothelial cells. Activation of Nrf2 by CDDO-IM increased the amount of bioavailable nitric oxide (NO), a major contributor to vascular homeostasis, in naive and stressed cells. Concomitantly, intracellular reactive oxygen species were dose-and time-dependently reduced. In apparent contrast to elevated NO levels, eNOS protein expression was transiently decreased in an Nrf2-dependent manner. Employing pharmacological inhibitors as well as a small interfering RNA approach, we identified de novo protein synthesis of heme oxygenase 1 (HO-1) and its enzymatic activity as cause for the observed reduction of eNOS. We hypothesize that under redox stress, when the availability of tetrahydrobiopterin, a pivotal stoichiometric cofactor for eNOS, is limited, activation of Nrf2 leads (a) to transient reduction of eNOS protein levels and (b) to an antioxidant defense in human umbilical vein endothelial cells. Both activities ensure that a stoichiometric ratio of eNOS and tetrahydrobiopterin is sustained and that the risk of eNOS uncoupling is reduced. Our study is the first to provide a causal link between Nrf2 activation and eNOS expression and NO levels, respectively.

Indexed as

AntioxidantsBiopterinsCells, CulturedEndothelium, VascularHeme Oxygenase-1HumansImidazolesImmunoblottingNF-E2-Related Factor 2Nitric OxideNitric Oxide Synthase Type IIIOleanolic AcidOxidation-ReductionReactive Oxygen SpeciesUmbilical Veins1-(2-cyano-3,12-dioxooleana-1,9-dien-28-oyl) imidazoleAntioxidantsBiopterinsHeme Oxygenase-1ImidazolesNFE2L2 protein, humanNF-E2-Related Factor 2Nitric OxideNitric Oxide Synthase Type IIINOS3 protein, humanOleanolic AcidReactive Oxygen Speciessapropterin

Identifiers

PMID19797052
PMCPMC2797228
OpenAlexW2013567290

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.