Cited by 41Air Quality and Health ImpactsAutism Spectrum Disorder ResearchHeavy Metal Exposure and Toxicity

Enhanced cerebellar myelination with concomitant iron elevation and ultrastructural irregularities following prenatal exposure to ambient particulate matter in the mouse

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Klocke, Carolyn, Sherina, Valeriia, Graham, Uschi M., Gunderson, Jakob, Allen, Joshua L., Sobolewski, Marissa, Blum, Jason L., Zelikoff, Judith T. +1 more·2018·Inhalation Toxicology

Abstract

Accumulating evidence indicates the developing central nervous system (CNS) is a target of air pollution toxicity. Epidemiological reports increasingly demonstrate that exposure to the particulate matter (PM) fraction of air pollution during neurodevelopment is associated with an increased risk of neurodevelopmental disorders (NDDs) such as autism spectrum disorder (ASD). These observations are supported by animal studies demonstrating prenatal exposure to concentrated ambient PM induces neuropathologies characteristic of ASD, including ventriculomegaly and aberrant corpus callosum (CC) myelination. Given the role of the CC and cerebellum in ASD etiology, this study tested whether prenatal exposure to concentrated ambient particles (CAPs) produced pathological features in offspring CC and cerebella consistent with ASD. Analysis of cerebellar myelin density revealed male-specific hypermyelination in CAPs-exposed offspring at postnatal days (PNDs) 11-15 without alteration of cerebellar area. Atomic absorption spectroscopy (AAS) revealed elevated iron (Fe) in the cerebellum of CAPs-exposed female offspring at PNDs 11-15, which connects with previously observed elevated Fe in the female CC. The presence of Fe inclusions, along with aluminum (Al) and silicon (Si) inclusions, were confirmed at nanoscale resolution in the CC along with ultrastructural myelin sheath damage. Furthermore, RNAseq and gene ontology (GO) enrichment analyses revealed cerebellar gene expression was significantly affected by sex and prenatal CAPs exposure with significant enrichment in inflammation and transmembrane transport processes that could underlie observed myelin and metal pathologies. Overall, this study highlights the ability of PM exposure to disrupt myelinogenesis and elucidates novel molecular targets of PM-induced developmental neurotoxicity.

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  1. Brown AP, Brydson RMD, Hondow NS. 2014 Measuring in vitro cellular uptake of nanoparticles by transmission electron microscopy. Journal of Physics: Conference Series. 522(1): 012058.
  2. Connor JR, Menzies SL. 1996 Relationship of iron to oligodendrocytes and myelination. Glia. 17(2): 83– 93. 8776576
  3. Groiss SJ, Ugawa Y. 2013 Cerebellum Handb Clin Neurol. 116: 643– 653. eng. 24112930

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Authors
Klocke, C., Sherina, V., Graham, U. M., Gunderson, J., Allen, J. L., Sobolewski, M., Blum, J. L., Zelikoff, J. T., & Cory-Slechta, D. A.
Affiliations
  • University of Rochester Medicine (US)
  • University of Kentucky (US)
  • New York University (US)
  • Department of Environmental Medicine, University of Rochester School of Medicine, Rochester, NY, USA;
Corresponding author
Klocke, Carolyn
Venue
Inhalation Toxicology
Published
2018-08-24
Volume
30
Issue
9-10
Pages
381-396
ISSN
  • 0895-8378 (ISSN-L)
  • 1091-7691
OpenAlex
W2906560729
Cited by
41
References
104
Citations by year
2026: 2 · 2025: 1 · 2024: 3 · 2023: 5 · 2022: 9 · 2021: 10 · 2020: 9 · 2019: 2
FWCI
2.59
Type
journal article
Language
en
Open access
Locations
  • Inhalation Toxicology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • Figshare (submittedVersion, cc-by)
  • Figshare (cc-by)
Funders
National Institutes of Environmental Health Sciences (P30 ES001247, R01 ES025541, T32 ES07026, P30 ES000260, 21-F12-13)
Topics
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Air Quality and Health Impacts
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Heavy Metal Exposure and Toxicity
Keywords
ambient particulate matter, prenatal air pollution exposure, autism spectrum disorder, developmental neurotoxicity, iron accumulation, metallic inclusions, sex differences, neurodevelopmental disorders
MeSH terms
Air Pollution, Animals, Cerebellum, Corpus Callosum, Female, Iron, Male, Myelin Sheath, Pregnancy, Prenatal Exposure Delayed Effects, Mice, Particulate Matter

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