Evidence map›Paper›PMID 22212472›Full record

ArticleAging cell2012

Identification of age-specific Nrf2 binding to a novel antioxidant response element locus in the Gclc promoter: a compensatory means for the loss of glutathione synthetic capacity in the aging rat liver?

Swapna V Shenvi, Eric Smith, Tory M Hagen

Open access · bronzeAbstract read
In one paragraph

Article in Aging cell, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
1.7field-weighted citation impact, top 16% 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

23 citing papers in PubMed, 42 citations in OpenAlex.

  1. Review
  2. Article
  3. Aging of Liver in Its Different Diseases.International journal of molecular sciences · 2022
    Review
  4. Article
  5. Article
  6. Review
  7. Attenuation of Age-Related Hepatic Steatosis byAdvances in pharmacological and pharmaceutical sciences · 2020
    Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Review
  13. Review
  14. Review
  15. Article
  16. Oxidative stress response and Nrf2 signaling in aging.Free radical biology & medicine · 2015
    Review
  17. How fisetin reduces the impact of age and disease on CNS function.Frontiers in bioscience (Scholar edition) · 2015
    Review
  18. Article
  19. Stress proteins in aging and life span.International journal of hyperthermia : the official journal of European Society for Hyperthermic Oncology, North American Hyperthermia Group · 2013
    Review
  20. Article
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

3 authors at 2 institutions in 3 countries.

Swapna V ShenviMolecular and Cellular Biology Program, Oregon State University, Corvallis, OR 97331, USA.
Eric Smith
Tory M Hagen
Linus (Norway) · NOOregon State University · US

Funding

Overall Program/FreiP01AT002034 · NCCIH · OREGON STATE UNIVERSITY · PI FREI, BALZ B · 2003 to 2012
$11.7M
DIETARY PREVENTION OF CARDIAC MITOCHONDRIAL AGINGR01AG017141 · NIA · OREGON STATE UNIVERSITY · PI HAGEN, TORY M · 2000 to 2011
$2.7M
NCCIH NIH HHS P01 AT002034NIA NIH HHS 2R01 AG017141-06A2NIA NIH HHS R01 AG017141
6 · The paper itself

Abstract

NFE2-related factor 2 (Nrf2) transcriptionally governs the cellular response to harmful electrophiles, xenobiotics, and reactive oxygen species. Its nuclear levels decline with age (Suh et al., 2004a), which in part explains the age-related loss of phase II detoxification. However, little work has yet characterized how age affects Nrf2 DNA binding or the role that alterations to the Nrf2 transcriptional apparatus plays in modulating Nrf2-mediated gene expression. In this study, we used immunoprecipitation assays to show that Nrf2 bound to the active antioxidant response element (ARE) of the catalytic subunit of glutamate cysteine ligase (GCLC) is significantly lower in hepatic chromatin from aged vs. young rats. Moreover, the activity at this ARE locus is diminished during aging because of the presence of Bach1 and the absence of CREB-binding protein (CBP), a transcriptional repressor and co-activator, respectively. Further analysis reveals that Nrf2 occupies an alternate ARE site located -2.2 kb downstream from the normally active ARE binding site in livers of old rats, indicating an age-specific adaptation to maintain gene expression. Our results, thus, show that the conversion of Nrf2 binding from an active ARE to an alternative ARE element is not adequate to maintain basal expression of hepatic Gclc in old rats, which provides a potential mechanism for the age-related loss of glutathione synthetic and other phase II enzymes.

Indexed as

AgingResponse ElementsAnimalsAntioxidantsCells, CulturedGenetic LociGlutamate-Cysteine LigaseGlutathioneLiverMaleNF-E2-Related Factor 2Protein BindingRatsRats, Inbred F344AntioxidantsGCLC protein, ratGlutamate-Cysteine LigaseGlutathioneNfe2l2 protein, ratNF-E2-Related Factor 2

Identifiers

PMID22212472
PMCPMC3988790
OpenAlexW2154651811

What OpenQuestion holds

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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.