Evidence map›Paper›PMID 25668719›Full record

ArticleArchives of biochemistry and biophysics2015

The invertebrate Caenorhabditis elegans biosynthesizes ascorbate.

Alexander N Patananan, Lauren M Budenholzer, Maria E Pedraza, Eric R Torres, Lital N Adler, Steven G Clarke

Open access · greenAbstract read
In one paragraph

Article in Archives of biochemistry and biophysics, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
1.2field-weighted citation impact, top 22% 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

16 citing papers in PubMed, 28 citations in OpenAlex.

  1. Article
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  3. Cecytb-2, a CytochromeBiomolecules · 2025
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  4. C11orf54 catalyzes L-xylulose formation in human metabolism.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  5. Review
  6. UPReLife · 2024
    Article
  7. Article
  8. Review
  9. Review
  10. Article
  11. Article
  12. Article
  13. Article
  14. Review
  15. Vitamin BRedox biology · 2017
    Article
  16. 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

6 authors at 1 institution in 1 country.

Alexander N PatanananDepartment of Chemistry and Biochemistry and the Molecular Biology Institute, UCLA, Los Angeles, CA 90095, USA.
Lauren M BudenholzerDepartment of Chemistry and Biochemistry and the Molecular Biology Institute, UCLA, Los Angeles, CA 90095, USA.
Maria E PedrazaDepartment of Chemistry and Biochemistry and the Molecular Biology Institute, UCLA, Los Angeles, CA 90095, USA.
Eric R TorresDepartment of Chemistry and Biochemistry and the Molecular Biology Institute, UCLA, Los Angeles, CA 90095, USA.
Lital N AdlerDepartment of Chemistry and Biochemistry and the Molecular Biology Institute, UCLA, Los Angeles, CA 90095, USA.
Steven G ClarkeDepartment of Chemistry and Biochemistry and the Molecular Biology Institute, UCLA, Los Angeles, CA 90095, USA. Electronic address: clarke@mbi.ucla.edu.
UCLA Medical Center · US

Funding

UCLA NIGMS T32 Program AssessmentT32GM007185 · NIGMS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI TORRES, JORGE · 1985 to 2020
$21.7M
CONTROL OF EUCARYOTIC FUNCTION BY METHYLATIONR37GM026020 · NIGMS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI CLARKE, STEVEN G · 2000 to 2009
$5.0M
CONTROL OF EUKARYOTIC MEMBRANE FUNCTION BY METHYLATIONR01GM026020 · NIGMS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI CLARKE, STEVEN G · 1985 to 2013
$2.1M
NIGMS NIH HHS GM007185NIGMS NIH HHS GM026020NIGMS NIH HHS R01 GM026020NIGMS NIH HHS R37 GM026020NIGMS NIH HHS T32 GM007185
6 · The paper itself

Abstract

l-Ascorbate, commonly known as vitamin C, serves as an antioxidant and cofactor essential for many biological processes. Distinct ascorbate biosynthetic pathways have been established for animals and plants, but little is known about the presence or synthesis of this molecule in invertebrate species. We have investigated ascorbate metabolism in the nematode Caenorhabditis elegans, where this molecule would be expected to play roles in oxidative stress resistance and as cofactor in collagen and neurotransmitter synthesis. Using high-performance liquid chromatography and gas-chromatography mass spectrometry, we determined that ascorbate is present at low amounts in the egg stage, L1 larvae, and mixed animal populations, with the egg stage containing the highest concentrations. Incubating C. elegans with precursor molecules necessary for ascorbate synthesis in plants and animals did not significantly alter ascorbate levels. Furthermore, bioinformatic analyses did not support the presence in C. elegans of either the plant or the animal biosynthetic pathway. However, we observed the complete (13)C-labeling of ascorbate when C. elegans was grown with (13)C-labeled Escherichia coli as a food source. These results support the hypothesis that ascorbate biosynthesis in invertebrates may proceed by a novel pathway and lay the foundation for a broader understanding of its biological role.

Indexed as

AnimalsAntioxidantsAscorbic AcidCaenorhabditis elegansCarbon IsotopesChromatography, High Pressure LiquidEthanolGas Chromatography-Mass SpectrometryGenes, HelminthMetabolic Networks and PathwaysOxidative StressParaquatAntioxidantsAscorbic AcidCarbon IsotopesEthanolParaquatAscorbic acidBiosynthetic pathwayCaenorhabditis elegansInvertebratesVitamin C

Identifiers

PMID25668719
PMCPMC4357563
OpenAlexW2022119172

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.