Evidence map›Paper›PMID 25942042›Full record

ArticleTranslational psychiatry2015

d-serine levels in Alzheimer's disease: implications for novel biomarker development.

C Madeira, M V Lourenco, C Vargas-Lopes, C K Suemoto, C O Brandão, T Reis, R E P Leite, J Laks, W Jacob-Filho, C A Pasqualucci and 3 more

Open access · goldAbstract read
In one paragraph

Article in Translational psychiatry, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 105 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
105citing papers in PubMed, 1 pooled it
11.3field-weighted citation impact, top 1% 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

105 citing papers in PubMed, 1 synthesis or guideline pooled it, 221 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Review
  4. Review
  5. Article
  6. Article
  7. Article
  8. Review
  9. Review
  10. Article
  11. Article
  12. Review
  13. Review
  14. Review
  15. Article
  16. International journal of molecular sciences · 2025
    Article
  17. Cell type-specific master metabolic regulators of Alzheimer's disease.bioRxiv : the preprint server for biology · 2025
    Article
  18. Review
  19. Article
  20. Early involvement of D-serine in β-amyloid-dependent pathophysiology.Cellular and molecular life sciences : CMLS · 2025
    Article

45 more citing papers are in PubMed but not listed here.

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

13 authors at 4 institutions in 3 countries.

C MadeiraInstitute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
M V LourencoInstitute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
C Vargas-LopesInstitute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
C K SuemotoDiscipline of Geriatrics, University of São Paulo Medical School, Sao Paulo, Brazil.
C O BrandãoInstitute of Psychiatry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
T ReisInstitute of Psychiatry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.ORCID 0000000217797226
R E P LeiteDepartment of Pathology, University of São Paulo Medical School, Sao Paulo, Brazil.
J LaksInstitute of Psychiatry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
W Jacob-FilhoDiscipline of Geriatrics, University of São Paulo Medical School, Sao Paulo, Brazil.
C A PasqualucciDepartment of Pathology, University of São Paulo Medical School, Sao Paulo, Brazil.
L T Grinberg1] Department of Pathology, University of São Paulo Medical School, Sao Paulo, Brazil [2] Department of Neurology, Memory and Aging Center, University of California, San Francisco, CA, USA.
S T Ferreira1] Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil [2] Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
R Panizzutti1] Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil [2] Institute of Psychiatry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
Universidade Federal do Rio de Janeiro · BRUniversidade de São Paulo · BRCzech Academy of Sciences, Institute of Biophysics · CZUniversity Memory and Aging Center · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Alzheimer's disease (AD) is a severe neurodegenerative disorder still in search of effective methods of diagnosis. Altered levels of the NMDA receptor co-agonist, d-serine, have been associated with neurological disorders, including schizophrenia and epilepsy. However, whether d-serine levels are deregulated in AD remains elusive. Here, we first measured D-serine levels in post-mortem hippocampal and cortical samples from nondemented subjects (n=8) and AD patients (n=14). We next determined d-serine levels in experimental models of AD, including wild-type rats and mice that received intracerebroventricular injections of amyloid-β oligomers, and APP/PS1 transgenic mice. Finally, we assessed d-serine levels in the cerebrospinal fluid (CSF) of 21 patients with a diagnosis of probable AD, as compared with patients with normal pressure hydrocephalus (n=9), major depression (n=9) and healthy controls (n=10), and results were contrasted with CSF amyloid-β/tau AD biomarkers. d-serine levels were higher in the hippocampus and parietal cortex of AD patients than in control subjects. Levels of both d-serine and serine racemase, the enzyme responsible for d-serine production, were elevated in experimental models of AD. Significantly, d-serine levels were higher in the CSF of probable AD patients than in non-cognitively impaired subject groups. Combining d-serine levels to the amyloid/tau index remarkably increased the sensitivity and specificity of diagnosis of probable AD in our cohort. Our results show that increased brain and CSF d-serine levels are associated with AD. CSF d-serine levels discriminated between nondemented and AD patients in our cohort and might constitute a novel candidate biomarker for early AD diagnosis.

Indexed as

AgedAged, 80 and overAlzheimer DiseaseAmyloid beta-PeptidesAmyloid beta-Protein PrecursorAnimalsBiomarkersCase-Control StudiesCerebral CortexDisease Models, AnimalFemaleHippocampusHumansHydrocephalus, Normal PressureMajor Depressive DisorderMaleAmyloid beta-PeptidesAmyloid beta-Protein PrecursorBiomarkersSerine

Identifiers

PMID25942042
PMCPMC4471283
OpenAlexW1570236416

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-SA
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.