H2AK119ub dynamics control hair follicle stem cell quiescence.

ABSTRACT: Adult stem cells (SCs) transition between quiescent and active states to maintain tissue integrity, and dysregulation of this balance can lead to tissue degeneration, cancer, or premature aging. Both intrinsic factors and extrinsic niche signals influence these states; however, the molecular mechanisms that integrate extrinsic cues with intrinsic programs remain poorly understood. Here, we show that the conserved repressive histone mark, H2AK119ub, serves as a molecular switch linking inhibitory fibroblast growth factor (FGF) signals with the quiescent transcriptional program in hair follicle stem cells (HFSCs). Modulation of FGF signaling is associated with changes in H2AK119ub levels, thereby toggling HFSCs between quiescence and activation states. Mechanistically, H2AK119ub directly rep

SUBMITTER: Flora P 

PROVIDER: S-EPMC12714759 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature