Evidence map›Paper›PMID 22170049›Full record

ArticleThe Journal of biological chemistry2012

Vitamin C deficiency activates the purine nucleotide cycle in zebrafish.

Jay S Kirkwood, Katie M Lebold, Cristobal L Miranda, Charlotte L Wright, Galen W Miller, Robert L Tanguay, Carrie L Barton, Maret G Traber, Jan F Stevens

Open access · hybridAbstract read
In one paragraph

Article in The Journal of biological chemistry, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 42 papers.

0numbers the graph read from it
0cells of the map it votes in
42citing papers in PubMed
3.2field-weighted citation impact, top 9% 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

42 citing papers in PubMed, 65 citations in OpenAlex.

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  15. Recent Application of Zebrafish Models in Atherosclerosis Research.Frontiers in cell and developmental biology · 2021
    Review
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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

9 authors at 2 institutions in 2 countries.

Jay S KirkwoodLinus Pauling Institute, Oregon State University, Corvallis, Oregon 97331, USA.
Katie M Lebold
Cristobal L Miranda
Charlotte L Wright
Galen W Miller
Robert L Tanguay
Carrie L Barton
Maret G Traber
Jan F Stevens
Oregon State University · USLinus (Norway) · NO

Funding

Reducing Susceptibility to Environmental Stress Throughout the Life SpanP30ES000210 · NIEHS · OREGON STATE UNIVERSITY · PI BECKMAN, JOSEPH S · 1985 to 2015
$21.4M
Ascorbylation of Oxidized Lipids and AtherosclerosisR01HL081721 · NHLBI · OREGON STATE UNIVERSITY · PI STEVENS, JAN FREDERIK · 2006 to 2010
$1.5M
Mechanisms of Vitamin E Function Studied in ZebrafishR01HD062109 · NICHD · OREGON STATE UNIVERSITY · PI TRABER, MARET G · 2009 to 2010
$737k
Triple Quadrupole/Linear Ion Trap LC-MS/MS for LPIS10RR027878 · NCRR · OREGON STATE UNIVERSITY · PI STEVENS, JAN FREDERIK · 2010 to 2010
$484k
NCRR NIH HHS S10 RR027878NCRR NIH HHS S10RR027878NHLBI NIH HHS R01 HL081721NHLBI NIH HHS R01HL081721NICHD NIH HHS R01 HD062109NICHD NIH HHS R01HD062109NIEHS NIH HHS P30 ES000210NIEHS NIH HHS P30ES000210
6 · The paper itself

Abstract

Vitamin C (ascorbic acid, AA) is a cofactor for many important enzymatic reactions and a powerful antioxidant. AA provides protection against oxidative stress by acting as a scavenger of reactive oxygen species, either directly or indirectly by recycling of the lipid-soluble antioxidant, α-tocopherol (vitamin E). Only a few species, including humans, guinea pigs, and zebrafish, cannot synthesize AA. Using an untargeted metabolomics approach, we examined the effects of α-tocopherol and AA deficiency on the metabolic profiles of adult zebrafish. We found that AA deficiency, compared with subsequent AA repletion, led to oxidative stress (using malondialdehyde production as an index) and to major increases in the metabolites of the purine nucleotide cycle (PNC): IMP, adenylosuccinate, and AMP. The PNC acts as a temporary purine nucleotide reservoir to keep AMP levels low during times of high ATP utilization or impaired oxidative phosphorylation. The PNC promotes ATP regeneration by converting excess AMP into IMP, thereby driving forward the myokinase reaction (2ADP → AMP + ATP). On the basis of this finding, we investigated the activity of AMP deaminase, the enzyme that irreversibly deaminates AMP to form IMP. We found a 47% increase in AMP deaminase activity in the AA-deficient zebrafish, complementary to the 44-fold increase in IMP concentration. These results suggest that vitamin C is crucial for the maintenance of cellular energy metabolism.

Indexed as

alpha-TocopherolAnimalsAntioxidantsAscorbic AcidAscorbic Acid DeficiencyEnergy MetabolismGuinea PigsHumansPurine NucleotidesZebrafishalpha-TocopherolAntioxidantsAscorbic AcidPurine Nucleotides

Identifiers

PMID22170049
PMCPMC3281694
OpenAlexW1987679415

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.