Evidence map›Paper›PMID 33420078›Full record

ArticleScientific reports2021

Valproic acid-exposed astrocytes impair inhibitory synapse formation and function.

Kotomi Takeda, Takuya Watanabe, Kohei Oyabu, Shuntaro Tsukamoto, Yuki Oba, Takafumi Nakano, Kaori Kubota, Shutaro Katsurabayashi, Katsunori Iwasaki

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed, 1 pooled it
3.3field-weighted citation impact, top 9% of its field
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

13 citing papers in PubMed, 1 synthesis or guideline pooled it, 13 citations in OpenAlex.

  1. Valproate Exposure as anCNS & neurological disorders drug targets · 2025
    Pooled it
  2. Lamotrigine Ameliorates Epilepsy during Pregnancy in Rats by Inhibiting Astrocyte Activation via the NLRP3/TXNIP Pathway.Journal of neuroimmune pharmacology : the official journal of the Society on NeuroImmune Pharmacology · 2026
    Article
  3. Article
  4. Review
  5. Article
  6. Article
  7. Review
  8. Article
  9. Review
  10. Pathology and Astrocytes in Autism.Neuropsychiatric disease and treatment · 2023
    Review
  11. Article
  12. Astrocytes in Bipolar Disorder.Advances in neurobiology · 2021
    Article
  13. Review
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

9 authors at 1 institution in 1 country.

Kotomi TakedaDepartment of Neuropharmacology, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, 814-0180, Japan.
Takuya WatanabeDepartment of Neuropharmacology, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, 814-0180, Japan. twatanabe@fukuoka-u.ac.jp.
Kohei OyabuDepartment of Neuropharmacology, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, 814-0180, Japan.
Shuntaro TsukamotoDepartment of Neuropharmacology, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, 814-0180, Japan.
Yuki ObaDepartment of Neuropharmacology, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, 814-0180, Japan.
Takafumi NakanoDepartment of Pharmaceutical and Health Care Management, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, 814-0180, Japan.
Kaori KubotaDepartment of Neuropharmacology, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, 814-0180, Japan.
Shutaro KatsurabayashiDepartment of Neuropharmacology, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, 814-0180, Japan.
Katsunori IwasakiDepartment of Neuropharmacology, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, 814-0180, Japan.
Fukuoka University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Valproic acid (VPA) is widely prescribed to treat epilepsy. Maternal VPA use is, however, clinically restricted because of the severe risk that VPA may cause neurodevelopmental disorders in offspring, such as autism spectrum disorder. Understanding the negative action of VPA may help to prevent VPA-induced neurodevelopmental disorders. Astrocytes play a vital role in neurodevelopment and synapse function; however, the impact of VPA on astrocyte involvement in neurodevelopment and synapse function has not been examined. In this study, we examined whether exposure of cultured astrocytes to VPA alters neuronal morphology and synapse function of co-cultured neurons. We show that synaptic transmission by inhibitory neurons was small because VPA-exposed astrocytes reduced the number of inhibitory synapses. However, synaptic transmission by excitatory neurons and the number of excitatory synapses were normal with VPA-exposed astrocytes. VPA-exposed astrocytes did not affect the morphology of inhibitory neurons. These data indicate that VPA-exposed astrocytes impair synaptogenesis specifically of inhibitory neurons. Our results indicate that maternal use of VPA would affect not only neurons but also astrocytes and would result in perturbed astrocyte-mediated neurodevelopment.

Indexed as

AnimalsAnticonvulsantsAstrocytesCells, CulturedCoculture TechniquesFemaleGABAergic NeuronsMaternal-Fetal ExchangeMiceMice, Inbred ICRNeuronsPregnancyReceptor-Like Protein Tyrosine Phosphatases, Class 2RNA, MessengerSynapsesSynaptic TransmissionAnticonvulsantsPtprd protein, mouseReceptor-Like Protein Tyrosine Phosphatases, Class 2RNA, MessengerValproic Acid

Identifiers

PMID33420078
PMCPMC7794250
OpenAlexW3039473091

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.