Cited by 29Autism Spectrum Disorder ResearchGenetics and Neurodevelopmental DisordersPharmacological Effects and Toxicity Studies

Embryological exposure to valproic acid disrupts morphology of the deep cerebellar nuclei in a sexually dimorphic way

Mowery, Todd M., Wilson, Sarah M., Kostylev, Polina V., Dina, Blair, Buchholz, Jennifer B., Prieto, Anne L., Garraghty, Preston E.·2015·International Journal of Developmental Neuroscience

Abstract

Autism spectrum disorders (ASD) is diagnosed in males at a much higher rate than females. For this reason, the majority of autism research has used male subjects exclusively. However; more recent studies using genetic sex as a factor find that the development of the male and female brain is differentially affected by ASD. That is, the natural sex‐specific differences that exist between male and female brains lead to sexually dimorphic expressions of autism. Here we investigate the putative sexual dimorphism that exists in the deep cerebellar nuclei of male and female rats exposed to valproic acid (VPA) on embryological day 12.5. We find natural sex‐specific differences in adult nucleus area, length, and estimated cell populations. Therefore VPA exposure during embryology creates some sex‐specific deficits such as higher cell counts in the VPA males and lower cell counts in the VPA females. At the same time, some effects of VPA exposure occur regardless of sex. That is, smaller nucleus area and length lead to truncated nuclei in both VPA males and females. These deficits are more pronounced in the VPA males suggesting that genetic sex could play a role in teratogenic susceptibility to VPA. Taken together our results suggests that VPA exposure induces sexually dimorphic aberrations in morphological development along a mediolateral gradient at a discrete region of the hindbrain approximate to rhombomere (R) 1 and 2. Sex‐specific disruption of the local and long‐range projections emanating from this locus of susceptibility could offer a parsimonious explanation for the brain‐wide neuroanatomical variance reported in males and females with ASD.

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Crossref · 10.1016/j.ijdevneu.2014.10.003

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  • In prenatal VPA models, the cerebellum decreases in size and the amygdala increases in size.

    “Other brain areas that are affected include the cerebellum which decreases in size [247], and the amygdala which increases in size [265].”

    From Autism spectrum disorder: neuropathology and animal models (2017) · cites this paper as [247]

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Authors
Mowery, T. M., Wilson, S. M., Kostylev, P. V., Dina, B., Buchholz, J. B., Prieto, A. L., & Garraghty, P. E.
Affiliations
Indiana University Bloomington (US)
Corresponding author
Mowery, Todd M.
Venue
International Journal of Developmental Neuroscience
Publisher
Wiley
Published
2014-10-31
Volume
40
Issue
1
Pages
15-23
ISSN
  • 0736-5748 (ISSN-L)
  • 1873-474X
OpenAlex
W2049646297
Cited by
29
References
90
Citations by year
2026: 2 · 2024: 2 · 2023: 3 · 2022: 4 · 2021: 1 · 2020: 2 · 2019: 2 · 2018: 4 · 2017: 3 · 2016: 4 · 2015: 2
FWCI
1.67
Type
journal article
Language
en
Open access
closed
Locations
  • International Journal of Developmental Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Pharmacological Effects and Toxicity Studies
Keywords
valproic acid, autism spectrum disorder, deep cerebellar nuclei, sexual dimorphism, cerebellar morphology, sex differences in brain development, cell number, hindbrain development
MeSH terms
Animals, Animals, Newborn, Cell Count, Cerebellar Nuclei, Child Development Disorders, Pervasive, Disease Models, Animal, Embryo, Mammalian, Enzyme Inhibitors, Female, Male, Sex Characteristics, Valproic Acid, Case-Control Studies, Rats, Long-Evans, Rats

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