Cited by 164Per- and polyfluoroalkyl substances researchFluorine in Organic ChemistryToxic Organic Pollutants Impact

Neurotransmission targets of per-and polyfluoroalkyl substance neurotoxicity: Mechanisms and potential implications for adverse neurological outcomes

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Brown-Leung, Josephine M., Cannon, Jason R.·2022·Chemical Research in Toxicology

Abstract

Per- and polyfluoroalkyl substances (PFAS) are a group of persistent environmental pollutants that are ubiquitously found in the environment and virtually in all living organisms, including humans. PFAS cross the blood-brain barrier and accumulate in the brain. Thus, PFAS are a likely risk for neurotoxicity. Studies that measured PFAS levels in the brains of humans, polar bears, and rats have demonstrated that some areas of the brain accumulate greater amounts of PFAS. Moreover, in humans, there is evidence that PFAS exposure is associated with attention-deficit/hyperactivity disorder (ADHD) in children and an increased cause of death from Parkinson's disease and Alzheimer's disease in elderly populations. Given possible links to neurological disease, critical analyses of possible mechanisms of neurotoxic action are necessary to advance the field. This paper critically reviews studies that investigated potential mechanistic causes for neurotoxicity including (1) a change in neurotransmitter levels, (2) dysfunction of synaptic calcium homeostasis, and (3) alteration of synaptic and neuronal protein expression and function. We found growing evidence that PFAS exposure causes neurotoxicity through the disruption of neurotransmission, particularly the dopamine and glutamate systems, which are implicated in age-related psychiatric illnesses and neurodegenerative diseases. Evaluated research has shown there are highly reproduced increased glutamate levels in the hippocampus and catecholamine levels in the hypothalamus and decreased dopamine in the whole brain after PFAS exposure. There are significant gaps in the literature relative to the assessment of the nigrostriatal system (striatum and ventral midbrain) among other regions associated with PFAS-associated neurologic dysfunction observed in humans. In conclusion, evidence suggests that PFAS may be neurotoxic and associated with chronic and age-related psychiatric illnesses and neurodegenerative diseases. Thus, it is imperative that future mechanistic studies assess the impact of PFAS and PFAS mixtures on the mechanism of neurotransmission and the consequential functional effects.

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  • PFAS exposure is associated with neurological effects, including ADHD, cognitive decline, Parkinson's, and Alzheimer's, with high risk in children and the elderly.

    “| Neurological | ADHD, cognitive decline, Parkinson's, Alzheimer's. | High | Children, elderly | Long-term cognitive impairment | [225] |”

    From Industrial Applications, Environmental Fate, Human Exposure, and Health Effects of PFAS (2025) · cites this paper as [225]

    The Abstract reports evidence associating PFAS exposure with ADHD in children and Parkinson’s- and Alzheimer’s-related mortality in elderly populations. “PFAS Alter Behavioral Function” reports learning and memory deficits, including in adult mice exposed during development. The paper does not establish a uniformly high risk for children and the elderly or demonstrate long-term cognitive impairment in those human populations; it also describes the ADHD association as controversial. (LLM, conf=0.86)

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  1. [92]Tarazi FI; Baldessarini RJ Regional Localization of Dopamine and Ionotropic Glutamate Receptor Subtypes in Striatolimbic Brain Regions. J. Neurosci. Res 1999, 55 (4), 401– 410. 10723051
  2. [93]Tarazi FI; Campbell A; Yeghiayan SK; Baldessarini RJ Localization of Ionotropic Glutamate Receptors in Caudate-Putamen and Nucleus Accumbens Septi of Rat Brain: Comparison of NMDA, AMPA, and Kainate Receptors. Synapse 1998, 30 (2), 227– 235. 9723793

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Authors
Brown-Leung, J. M., & Cannon, J. R.
Affiliations
Purdue University West Lafayette (US)
Corresponding author
Cannon, Jason R.
Venue
Chemical Research in Toxicology
Published
2022-08-03
Volume
35
Issue
8
Pages
1312-1333
ISSN
  • 0893-228X (ISSN-L)
  • 1520-5010
OpenAlex
W4289654250
Cited by
164
References
109
Citations by year
2026: 58 · 2025: 53 · 2024: 36 · 2023: 15 · 2022: 2
FWCI
1.87
Type
journal article
Language
en
Open access
Locations
  • Chemical Research in Toxicology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute on Aging (AG068787)
Topics
  • Physical Sciences › Environmental Science › Environmental Chemistry › Per- and polyfluoroalkyl substances research
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmaceutical Science › Fluorine in Organic Chemistry
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Toxic Organic Pollutants Impact
Keywords
per- and polyfluoroalkyl substances, neurotransmission, dopaminergic system, glutamatergic system, blood-brain barrier, neurodegenerative diseases, Parkinson's disease, Alzheimer's disease, attention deficit hyperactivity disorder, catecholamines, hippocampus, hypothalamus, nigrostriatal pathway, PFAS mixtures, brain accumulation
MeSH terms
Aged, Animals, Child, Dopamine, Environmental Pollutants, Fluorocarbons, Glutamates, Humans, Synaptic Transmission, Neurotoxicity Syndromes, Rats

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