Evidence map›Paper›PMID 23143835›Full record

ArticleMolecular nutrition & food research2013

The relationship between intracellular and plasma levels of folate and metabolites in the methionine cycle: a model.

Tanya M Duncan, Michael C Reed, H Frederik Nijhout

Abstract read
In one paragraph

Article in Molecular nutrition & food research, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
–field-weighted citation impact
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

20 citing papers in PubMed.

  1. Trial
  2. Article
  3. NNature reviews. Cancer · 2026
    Review
  4. Article
  5. Article
  6. Article
  7. Frontiers in cell and developmental biology · 2022
    Review
  8. Article
  9. Metabolic Control of mMetabolites · 2021
    Review
  10. Epigenetic Histone Modifications in the Pathogenesis of Diabetic Kidney Disease.Diabetes, metabolic syndrome and obesity : targets and therapy · 2021
    Review
  11. Article
  12. Article
  13. Review
  14. Article
  15. Review
  16. Article
  17. One-carbon metabolism and epigenetics: understanding the specificity.Annals of the New York Academy of Sciences · 2016
    Review
  18. Article
  19. Article
  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.

Tanya M DuncanDepartment of Biology, Duke University, Durham, NC 27708, USA.
Michael C Reed
H Frederik Nijhout

Funding

Methods for Pathway Modeling with Application to FolateR01ES019876 · NIEHS · UNIVERSITY OF SOUTHERN CALIFORNIA · PI THOMAS, DUNCAN C. · 2010 to 2014
$2.9M
NIEHS NIH HHS R01 ES019876
6 · The paper itself

Abstract

scopeFolate status and the status of the methionine cycle are typically assessed by measuring folate and metabolites in the plasma. It is assumed that plasma metabolite levels are proportional to their levels in tissues, but there is little information to support this assumption. METHODS AND

resultsWe developed a mathematical model, based on known kinetics of the methionine cycle in the liver and tissues, and the transport kinetics of metabolites into and out of the plasma. We use the model to explore the relationship between folate status and metabolite values in the plasma, the relationships between metabolite values and methylation capacity, the response to a methionine load, and the half-life of folate in plasma and tissues. We also use the model to study the effects of Down syndrome and oxidative stress on metabolite values in plasma and tissues. The model accurately reproduces measured metabolite values pre- and post-folate fortification. The model shows that a high acute intake of folate remains largely restricted to the plasma and is rapidly excreted; only a prolonged exposure to increased folate elevates tissue folate significantly.

conclusionThe model accurately reproduces experimental and clinical findings and can serve as a platform to study, in silico, the relationships between metabolite values in tissues and plasma, and how these vary with methionine and B vitamin input, and with mutations in the genes for enzymes in the methionine cycle.

Indexed as

Models, TheoreticalCystathionine beta-SynthaseDown SyndromeFolic AcidFolic Acid DeficiencyHalf-LifeHomocysteineHumansMethionineMethylationNutritional StatusNutrition SurveysOxidative StressS-AdenosylmethionineVitamin B 12 DeficiencyVitamin B ComplexCystathionine beta-SynthaseFolic AcidHomocysteineMethionineS-AdenosylmethionineVitamin B ComplexVitamins

Identifiers

PMID23143835
PMCPMC3786706

What OpenQuestion holds

Textmetadata
LicenceTDM
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.