Evidence map›Paper›PMID 33167881›Full record

SynthesisMolecular medicine (Cambridge, Mass.)2020

Meta-analysis of metabolites involved in bioenergetic pathways reveals a pseudohypoxic state in Down syndrome.

Laszlo Pecze, Elisa B Randi, Csaba Szabo

Open access · goldAbstract readMeta-AnalysisReview
In one paragraph

Synthesis in Molecular medicine (Cambridge, Mass.), 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed, 1 pooled it
3.8field-weighted citation impact, top 6% 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

28 citing papers in PubMed, 1 synthesis or guideline pooled it, 40 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Role of cystathionine-β-synthase and hydrogen sulfide in down syndrome.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2025
    Review
  5. Article
  6. Cyanide overproduction impairs cellular bioenergetics in Down syndrome.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2025
    Article
  7. Metabolic profiling of amniotic fluid by differentialMetabolomics : Official journal of the Metabolomic Society · 2025
    Article
  8. Oxidative Stress and Down Syndrome: A Systematic Review.Antioxidants (Basel, Switzerland) · 2025
    Review
  9. Review
  10. Article
  11. Article
  12. Review
  13. Article
  14. Article
  15. Article
  16. Article
  17. HCellular and molecular life sciences : CMLS · 2022
    Article
  18. Review
  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 at 1 institution in 1 country.

Laszlo PeczeChair of Pharmacology, Section of Medicine, University of Fribourg, Fribourg, Switzerland.
Elisa B RandiChair of Pharmacology, Section of Medicine, University of Fribourg, Fribourg, Switzerland.
Csaba SzaboChair of Pharmacology, Section of Medicine, University of Fribourg, Fribourg, Switzerland. csaba.szabo@unifr.ch.ORCID 0000-0003-3110-4235
University of Fribourg · CH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Clinical observations and preclinical studies both suggest that Down syndrome (DS) may be associated with significant metabolic and bioenergetic alterations. However, the relevant scientific literature has not yet been systematically reviewed. The aim of the current study was to conduct a meta-analysis of metabolites involved in bioenergetics pathways in DS to conclusively determine the difference between DS and control subjects. We discuss these findings and their potential relevance in the context of pathogenesis and experimental therapy of DS. Articles published before July 1, 2020, were identified by using the search terms "Down syndrome" and "metabolite name" or "trisomy 21" and "metabolite name". Moreover, DS-related metabolomics studies and bioenergetics literature were also reviewed. 41 published reports and associated databases were identified, from which the descriptive information and the relevant metabolomic parameters were extracted and analyzed. Mixed effect model revealed the following changes in DS: significantly decreased ATP, CoQ10, homocysteine, serine, arginine and tyrosine; slightly decreased ADP; significantly increased uric acid, succinate, lactate and cysteine; slightly increased phosphate, pyruvate and citrate. However, the concentrations of AMP, 2,3-diphosphoglycerate, glucose, and glutamine were comparable in the DS vs. control populations. We conclude that cells of subjects with DS are in a pseudo-hypoxic state: the cellular metabolic and bio-energetic mechanisms exhibit pathophysiological alterations that resemble the cellular responses associated with hypoxia, even though the supply of the cells with oxygen is not disrupted. This fundamental alteration may be, at least in part, responsible for a variety of functional deficits associated with DS, including reduced exercise difference, impaired neurocognitive status and neurodegeneration.

Indexed as

Energy MetabolismMetabolic Networks and PathwaysAnimalsBiomarkersDisease ManagementDisease SusceptibilityDown SyndromeGene Expression ProfilingGene Expression RegulationGlucoseHumansHypoxiaMammalsMetabolomicsMitochondriaOxidative PhosphorylationBiomarkersGlucoseOxygenGlycolysisHypoxiaKrebs cycleMeta-analysisOxidative phosphorylation

Identifiers

PMID33167881
PMCPMC7653803
OpenAlexW3099550433

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.