Cited by 31Genetics and Neurodevelopmental DisordersAutism Spectrum Disorder ResearchNeuroscience and Neuropharmacology Research

MYT1L haploinsufficiency in human neurons and mice causes autism-associated phenotypes that can be reversed by genetic and pharmacologic intervention

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Weigel, Bettina, Tegethoff, Jana F., Grieder, Sarah D., Lim, Bryce, Nagarajan, Bhuvaneswari, Liu, Yu-Chao, Truberg, Jule, Papageorgiou, Dimitris +15 more·2023·Molecular Psychiatry

Abstract

MYT1L is an autism spectrum disorder (ASD)-associated transcription factor that is expressed in virtually all neurons throughout life. How MYT1L mutations cause neurological phenotypes and whether they can be targeted remains enigmatic. Here, we examine the effects of MYT1L deficiency in human neurons and mice. Mutant mice exhibit neurodevelopmental delays with thinner cortices, behavioural phenotypes, and gene expression changes that resemble those of ASD patients. MYT1L target genes, including WNT and NOTCH, are activated upon MYT1L depletion and their chemical inhibition can rescue delayed neurogenesis in vitro. MYT1L deficiency also causes upregulation of the main cardiac sodium channel, SCN5A, and neuronal hyperactivity, which could be restored by shRNA-mediated knockdown of SCN5A or MYT1L overexpression in postmitotic neurons. Acute application of the sodium channel blocker, lamotrigine, also rescued electrophysiological defects in vitro and behaviour phenotypes in vivo. Hence, MYT1L mutation causes both developmental and postmitotic neurological defects. However, acute intervention can normalise resulting electrophysiological and behavioural phenotypes in adulthood.

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Authors
Weigel, B., Tegethoff, J. F., Grieder, S. D., Lim, B., Nagarajan, B., Liu, Y.-C., Truberg, J., Papageorgiou, D., Adrian-Segarra, J. M., Schmidt, L. K., Kaspar, J., Poisel, E., Heinzelmann, E., Saraswat, M., Christ, M., Arnold, C., Ibarra, I. L., Campos, J., Krijgsveld, J., Monyer, H., Zaugg, J. B., Acuna, C., & Mall, M.
Affiliations
  • German Cancer Research Center (DE)
  • European Molecular Biology Laboratory (DE)
  • Helmholtz Munich (DE)
  • Heidelberg University (DE)
Corresponding author
Mall, Moritz
Venue
Molecular Psychiatry
Published
2023-02-14
Volume
28
Issue
5
Pages
2122-2135
ISSN
  • 1359-4184 (ISSN-L)
  • 1476-5578
OpenAlex
W4320481085
Cited by
31
References
78
Citations by year
2026: 6 · 2025: 13 · 2024: 7 · 2023: 5
FWCI
5.15
Type
journal article
Language
en
Open access
Locations
  • Molecular Psychiatry (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • PuSH - Publication Server of Helmholtz Zentrum München (submittedVersion, cc-by)
Funders
  • NASRAD, Hector Foundation
  • Deutsche Forschungsgemeinschaft (SFB1324)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
MYT1L, haploinsufficiency, autism spectrum disorder, transcription factors, neurodevelopmental delay, cortical thinning, Wnt signaling, Notch signaling, SCN5A, cardiac sodium channel, neuronal hyperactivity, lamotrigine, sodium channel blockers, behavioral phenotypes, postmitotic neurons, gene therapy
MeSH terms
Autism Spectrum Disorder, Animals, Autistic Disorder, Humans, Nerve Tissue Proteins, Neurons, Phenotype, Transcription Factors, Mice, Haploinsufficiency, NAV1.5 Voltage-Gated Sodium Channel

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