Frontiers in Immunology (Dec 2022)

Microglial Pten safeguards postnatal integrity of the cortex and sociability

  • Xing Zhou,
  • Xing Zhou,
  • Xing Zhou,
  • Jiacheng Wei,
  • Jiacheng Wei,
  • Jiacheng Wei,
  • Liang Li,
  • Zhenfeng Shu,
  • Ling You,
  • Ling You,
  • Yang Liu,
  • Yang Liu,
  • Ruozhu Zhao,
  • Ruozhu Zhao,
  • Ruozhu Zhao,
  • Jiacheng Yao,
  • Jiacheng Yao,
  • Jianbin Wang,
  • Jianbin Wang,
  • Minmin Luo,
  • Minmin Luo,
  • Yousheng Shu,
  • Kexin Yuan,
  • Kexin Yuan,
  • Hai Qi,
  • Hai Qi,
  • Hai Qi,
  • Hai Qi,
  • Hai Qi

DOI
https://doi.org/10.3389/fimmu.2022.1059364
Journal volume & issue
Vol. 13

Abstract

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Microglial abnormalities may contribute to neurodevelopmental disorders. PTEN is implicated as a susceptibility gene for autism spectrum disorders and its germline ablation in mice causes behavioral abnormalities. Here we find postnatal PTEN deletion in microglia causes deficits in sociability and novel object recognition test. Mutant mice harbor markedly more activated microglia that manifest enhanced phagocytosis. Interestingly, two-week postponement of microglia PTEN ablation leads to no social interaction defects, even though mutant microglia remain abnormal in adult animals. Disturbed neurodevelopment caused by early PTEN deletion in microglia is characterized by insufficient VGLUT1 protein in synaptosomes, likely a consequence of enhanced removal by microglia. In correlation, in vitro acute slice recordings demonstrate weakened synaptic inputs to layer 5 pyramidal neurons in the developing cortex. Therefore, microglial PTEN safeguards integrity of neural substrates underlying sociability in a developmentally determined manner.

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