Cited by 34Neurogenesis and neuroplasticity mechanismsPharmacological Effects and Toxicity StudiesAnesthesia and Neurotoxicity Research

Maternal Exposure to Valproic Acid Primarily Targets Interneurons Followed by Late Effects on Neurogenesis in the Hippocampal Dentate Gyrus in Rat Offspring

Watanabe, Yousuke, Murakami, Tomoaki, Kawashima, Masashi, Hasegawa-Baba, Yasuko, Mizukami, Sayaka, Imatanaka, Nobuya, Akahori, Yumi, Yoshida, Toshinori +1 more·2017·Neurotoxicity Research

Abstract

Valproic acid (VPA) is used to establish models of experimental autism. The present study investigated the developmental exposure effect of VPA on postnatal hippocampal neurogenesis in accordance with the exposure scheme of OECD Test Guideline 426 adopted for developmental neurotoxicity. Pregnant rats were administered drinking water containing 0, 667, or 2000 ppm VPA from gestational day 6 until day 21 post-delivery. In the subgranular zone (SGZ) and granule cell layer (GCL) of offspring, the number of granule cell lineage subpopulations remained unchanged upon weaning. However, in the hilus of the dentate gyrus, the number of reelin+ interneurons decreased at ≥667 ppm, and the number of PVALB+ or GAD67+ interneurons decreased at 2000 ppm. Conversely, Reln and Gad1 transcript levels increased at 2000 ppm, but Pvalb and Grin2d decreased, in the dentate gyrus. At the adult stage, PCNA+ proliferating SGZ cells, NeuN+ postmitotic SGZ/GCL neurons, and ARC+ or COX2+ GCL neurons increased at ≥667 ppm. In the dentate hilus, decreases in GAD67+ interneuron subpopulations and Grin2d transcript levels sustained at 2000 ppm. These results suggested that VPA primarily targets interneurons by developmental exposure, and this is followed by late effects on granule cell lineages, likely by influencing SGZ cell proliferation and synaptic plasticity. A reduced population of reelin+ or PVALB+ interneurons did not affect distribution of granule cell lineage subpopulations upon weaning. The late effect on neurogenesis, which resulted in increased GCL neurons, might be the result of a sustained decrease in GAD67+ interneurons expressing NR2D encoded by Grin2d.

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Crossref · 10.1007/s12640-016-9660-2

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  • VPA exposure in utero leads to fewer parvalbumin-expressing interneurons in the parietal and occipital cortex, fewer glutamate decarboxylase 67-immunoreactive interneurons in the dentate gyrus, cerebellum, and cortex, and loss of motor neurons in some motor nerve nuclei in the brainstem.

    “VPA exposure in utero leads to fewer parvalbumin-expressing interneurons in the parietal and occipital cortex [127], fewer glutamate decarboxylase 67-immunoreactive interneurons in the dentate gyrus, in the cerebellum and in the cortex [374], and loss of motor neurons in some of the motor nerve nuclei in the brainstem [303].”

    From Autism spectrum disorder: neuropathology and animal models (2017) · cites this paper as [374]

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Authors
Watanabe, Y., Murakami, T., Kawashima, M., Hasegawa-Baba, Y., Mizukami, S., Imatanaka, N., Akahori, Y., Yoshida, T., & Shibutani, M.
Affiliations
  • Gifu University (JP)
  • Tokyo University of Agriculture and Technology (JP)
  • Chemicals Evaluation and Research Institute (JP)
Corresponding author
Shibutani, Makoto
Venue
Neurotoxicity Research
Published
2016-08-26
Volume
31
Issue
1
Pages
46-62
ISSN
  • 1029-8428 (ISSN-L)
  • 1476-3524
OpenAlex
W2509303252
Cited by
34
References
56
Citations by year
2026: 1 · 2025: 3 · 2024: 4 · 2023: 3 · 2022: 8 · 2021: 5 · 2020: 2 · 2019: 1 · 2018: 2 · 2017: 4 · 2013: 1
FWCI
1.19
Type
journal article
Language
en
Open access
closed
Locations
  • Neurotoxicity Research (publishedVersion)
  • PubMed (publishedVersion)
Funders
Ministry of Economy, Trade and Industry
Topics
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Pharmacological Effects and Toxicity Studies
  • Life Sciences › Neuroscience › Developmental Neuroscience › Anesthesia and Neurotoxicity Research
Keywords
valproic acid, developmental neurotoxicity, interneurons, dentate gyrus, postnatal neurogenesis, subgranular zone, reelin, parvalbumin, GAD67, GRIN2D, autism model, maternal exposure, synaptic plasticity, granule cell proliferation
MeSH terms
Reelin Protein, Animals, Cell Movement, Cerebellar Cortex, Cerebral Cortex, Disease Models, Animal, Female, Interneurons, Male, Pregnancy, Prenatal Exposure Delayed Effects, Random Allocation, Valproic Acid, Apoptosis, Maternal Exposure, Dentate Gyrus, Rats, Stem Cell Niche, Neurogenesis, Drinking Water

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