Evidence map›Paper›PMID 26721301›Full record

ArticleToxicological sciences : an official journal of the Society of Toxicology2016

Comparison of Metal Levels between Postmortem Brain and Ventricular Fluid in Alzheimer's Disease and Nondemented Elderly Controls.

Steven T Szabo, G Jean Harry, Kathleen M Hayden, David T Szabo, Linda Birnbaum

Open access · bronzeAbstract read
In one paragraph

Article in Toxicological sciences : an official journal of the Society of Toxicology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 50 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
50citing papers in PubMed, 2 pooled it
3.7field-weighted citation impact, top 7% 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

50 citing papers in PubMed, 2 syntheses or guidelines pooled it, 89 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Review
  4. Alzheimer's Disease Risk AllelebioRxiv : the preprint server for biology · 2026
    Article
  5. Article
  6. Article
  7. Article
  8. Copper homeostasis and cuproptosis in Alzheimer's disease (Review).International journal of molecular medicine · 2025
    Review
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Review
  15. Review
  16. Article
  17. Update of the risk assessment of inorganic arsenic in food.EFSA journal. European Food Safety Authority · 2024
    Article
  18. Consequences of Disturbing Manganese Homeostasis.International journal of molecular sciences · 2023
    Review
  19. Review
  20. Review
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

5 authors at 4 institutions in 1 country.

Steven T Szabo*Veterans Affairs Medical Center, Mental Health Service Line, Durham, North Carolina 27705; Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, North Carolina 27705; steven.szabo@duke.edu.
G Jean HarryNeurotoxicology Group, National Toxicology Program Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina 27709;
Kathleen M HaydenDepartment of Psychiatry and Behavioral Sciences, Joseph and Kathleen ADRC, Duke University Medical Center, Durham, North Carolina 27705;
David T SzaboRAI Services Company, Winston Salem, North Carolina 27102; and.
Linda BirnbaumNational Cancer Institute, National Institutes of Health (NIH), Research Triangle Park, North Carolina 27709.
Duke Medical Center · USDuke University Hospital · USNational Institute of Environmental Health Sciences · USNational Institutes of Health · US

Funding

Environmentally Induced Alterations In Neuron And Glia Development and AgingZIAES021164 · NIEHS · NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES · PI HARRY, GAYLIA JEAN · 2009 to 2021
$15.4M
NEUROPATHOLOGY COREP30AG028377 · NIA · DUKE UNIVERSITY · PI WELSH-BOHMER, KATHLEEN ANNE · 2006 to 2011
$9.6M
Studies of the fate of environmental contaminants in humans and animalsZIABC011476 · NCI · DIVISION OF BASIC SCIENCES - NCI · PI BIRNBAUM, LINDA · 2013 to 2019
$5.8M
Neuroimmunotoxicology: autoimmunity, viral, infectious aZ01ES101623 · NIEHS · NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES · PI HARRY, GAYLIA JEAN · 2003 to 2008
$2.8M
Intramural NIH HHSNCI NIH HHS ZIA BC 011476NIA NIH HHS P30AG028377NIEHS NIH HHS 1Z01ES101623NIEHS NIH HHS ES021164PHS HHS HHSN27320100003C
6 · The paper itself

Abstract

An essential metal hypothesis for neurodegenerative disease suggests an alteration in metal homeostasis contributing to the onset and progression of disease. Similar associations have been proposed for nonessential metals. To examine the relationship between metal levels in brain tissue and ventricular fluid (VF), postmortem samples of frontal cortex (FC) and VF from Alzheimer's disease (AD) cases and nondemented elderly subjects were analyzed for arsenic (As), cadmium (Cd), chromium (Cr), cobalt (Co), copper (Cu), iron (Fe), lead (Pb), manganese (Mn), mercury (Hg), nickel (Ni), tin (Sn), vanadium (V), and zinc (Zn) using inductively coupled plasma sector field mass spectrometry. All metals, with exception of equivalent Pb levels, were lower in the VF, compared to FC. Within-subject comparisons demonstrated that VF levels were not representative of levels within brain tissue. The essential metals Cu, Fe, and Zn were found highest in both compartments. Cd, Hg, and V levels in the VF were below the limit of quantification. In AD cases, FC levels of Fe were higher and As and Cd were lower than levels in controls, while levels of As in the VF were higher. Parameter estimates for FC metal levels indicated an association of Braak stage and higher Fe levels and an association of Braak stage and lower As, Mn, and Zn levels. The data showed no evidence of an accumulation of nonessential metals within the AD brain and, with the exception of As, showed no significant shift in the ratio of FC to VF levels to indicate differential clearance.

Indexed as

Metals, HeavyTrace ElementsAgedAged, 80 and overAlzheimer DiseaseAutopsyBrainCase-Control StudiesFemaleHumansMaleMetals, HeavyTrace Elementsamyloid betabraincerebral spinal fluidheavy metalsneurodegenerative disease

Identifiers

PMID26721301
PMCPMC4881830
OpenAlexW2261076203

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.