Evidence map›Paper›PMID 40278152›Full record

ReviewJournal of xenobiotics2025

Associations of Environmental Exposure to Arsenic, Manganese, Lead, and Cadmium with Alzheimer's Disease: A Review of Recent Evidence from Mechanistic Studies.

Giasuddin Ahmed, Md Shiblur Rahaman, Enrique Perez, Khalid M Khan

Abstract readReview
In one paragraph

Review in Journal of xenobiotics, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.

0numbers the graph read from it
0cells of the map it votes in
18citing 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

18 citing papers in PubMed.

  1. Review
  2. Review
  3. Review
  4. Review
  5. Arsenic Promotes Intracellular AβBiological trace element research · 2026
    Article
  6. Review
  7. Review
  8. Article
  9. Neurotransmitter Systems in Alzheimer's Disease.Current issues in molecular biology · 2026
    Review
  10. Review
  11. Review
  12. Article
  13. Article
  14. Article
  15. Review
  16. Article
  17. Review
  18. 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

4 authors.

Giasuddin AhmedDepartment of Biology and Chemistry, Texas A&M International University, Laredo, TX 78041, USA.
Md Shiblur RahamanDepartment of Public Health, College of Health Sciences, Sam Houston State University, Huntsville, TX 77341, USA.ORCID 0000-0002-9920-4809
Enrique PerezDepartment of Biology and Chemistry, Texas A&M International University, Laredo, TX 78041, USA.
Khalid M KhanDepartment of Public Health, College of Health Sciences, Sam Houston State University, Huntsville, TX 77341, USA.

Funding

Building Capacity to study mixed metal-induced neurotoxicity in rural Bangladeshi children-A1R01ES032149 · NIEHS · SAM HOUSTON STATE UNIVERSITY · PI KHAN, KHALID M. · 2021 to 2025
$2.7M
National Institute of Environmental Health Sciences of the National Institutes of Health (NIH) R01ES032149NIEHS NIH HHS R01 ES032149Texas A&M International University University Research Grant
6 · The paper itself

Abstract

Numerous epidemiological studies indicate that populations exposed to environmental toxicants such as heavy metals have a higher likelihood of developing Alzheimer's disease (AD) compared to those unexposed, indicating a potential association between heavy metals exposure and AD. The aim of this review is to summarize contemporary mechanistic research exploring the associations of four important metals, arsenic (As), manganese (Mn), lead (Pb), and cadmium (Cd), with AD and possible pathways, processes, and molecular mechanisms on the basis of data from the most recent mechanistic studies. Primary research publications published during the last decade were identified via a search of the PubMed Database. A thorough literature search and final screening yielded 45 original research articles for this review. Of the 45 research articles, 6 pertain to As, 9 to Mn, 21 to Pb, and 9 to Cd exposures and AD pathobiology. Environmental exposure to these heavy metals induces a wide range of pathological processes that intersect with well-known mechanisms leading to AD, such as oxidative stress, mitochondrial dysfunction, protein aggregation, neuroinflammation, autophagy dysfunction, and tau hyperphosphorylation. While exposure to single metals shares some affected pathways, certain effects are unique to specific metals. For instance, Pb disrupts the blood-brain barrier (BBB) and mitochondrial functions and alters AD-related genes epigenetically. Cd triggers neuronal senescence via p53/p21/Rb. As disrupts nitric oxide (NO) signaling, cortical, and synaptic function. Mn causes glutamate excitotoxicity and dopamine neuron damage. Our review provides a deeper understanding of biological mechanisms showing how metals contribute to AD. Information regarding the potential metal-induced toxicity relevant to AD may help us develop effective therapeutic AD intervention, treatment, and prevention.

Indexed as

Alzheimer’s diseasearseniccadmiumheavy metalsmechanistic studiesneurodegenerative diseases

Identifiers

PMID40278152
PMCPMC12029005

What OpenQuestion holds

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Registered trials

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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.