The bone transcription factor Osterix controls extracellular matrix- and node of Ranvier-related gene expression in oligodendrocytes

Benayahu Elbaz*, Alaa Darwish, Maia Vardy, Sara Isaac, Haley Margaret Tokars, Yulia Dzhashiashvili, Kirill Korshunov, Murali Prakriya, Amir Eden, Brian Popko*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Oligodendrocytes are the primary producers of many extracellular matrix (ECM)-related proteins found in the CNS. Therefore, oligodendrocytes play a critical role in the determination of brain stiffness, node of Ranvier formation, perinodal ECM deposition, and perineuronal net formation, all of which depend on the ECM. Nevertheless, the transcription factors that control ECM-related gene expression in oligodendrocytes remain unknown. Here, we found that the transcription factor Osterix (also known as Sp7) binds in proximity to genes important for CNS ECM and node of Ranvier formation and mediates their expression. Oligodendrocyte-specific ablation of Sp7 changes ECM composition and brain stiffness and results in aberrant node of Ranvier formation. Sp7 is known to control osteoblast maturation and bone formation. Our comparative analyses suggest that Sp7 plays a conserved biological role in oligodendrocytes and in bone-forming cells, where it mediates brain and bone tissue stiffness by controlling expression of ECM components.

Original languageEnglish (US)
Pages (from-to)247-263.e6
JournalNeuron
Volume112
Issue number2
DOIs
StatePublished - Jan 17 2024

Keywords

  • Sp7
  • extracellular matrix
  • myelin
  • myelination
  • node of Ranvier
  • oligodendrocyte
  • osterix
  • remyelination
  • transcription factor

ASJC Scopus subject areas

  • General Neuroscience

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