LSD1 controls a nuclear checkpoint in Wnt/β-Catenin signaling to regulate muscle stem cell self-renewal

Nucleic Acids Res. 2024 Apr 24;52(7):3667-3681. doi: 10.1093/nar/gkae060.

Abstract

The Wnt/β-Catenin pathway plays a key role in cell fate determination during development and in adult tissue regeneration by stem cells. These processes involve profound gene expression and epigenome remodeling and linking Wnt/β-Catenin signaling to chromatin modifications has been a challenge over the past decades. Functional studies of the lysine demethylase LSD1/KDM1A converge to indicate that this epigenetic regulator is a key regulator of cell fate, although the extracellular cues controlling LSD1 action remain largely unknown. Here we show that β-Catenin is a substrate of LSD1. Demethylation by LSD1 prevents β-Catenin degradation thereby maintaining its nuclear levels. Consistently, in absence of LSD1, β-Catenin transcriptional activity is reduced in both MuSCs and ESCs. Moreover, inactivation of LSD1 in mouse muscle stem cells and embryonic stem cells shows that LSD1 promotes mitotic spindle orientation via β-Catenin protein stabilization. Altogether, by inscribing LSD1 and β-Catenin in the same molecular cascade linking extracellular factors to gene expression, our results provide a mechanistic explanation to the similarity of action of canonical Wnt/β-Catenin signaling and LSD1 on stem cell fate.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Cell Differentiation / genetics
  • Cell Nucleus / metabolism
  • Cell Self Renewal* / genetics
  • Histone Demethylases* / genetics
  • Histone Demethylases* / metabolism
  • Humans
  • Mice
  • Spindle Apparatus / metabolism
  • Stem Cells / cytology
  • Stem Cells / metabolism
  • Wnt Signaling Pathway*
  • beta Catenin* / genetics
  • beta Catenin* / metabolism

Substances

  • Histone Demethylases
  • beta Catenin
  • KDM1a protein, mouse