Fibro-adipogenic progenitors (FAPs) in muscle tissues help muscle regeneration but become senescent in aging, affecting their interaction with muscle progenitor/stem cells (MPCs), especially in Hutchinson-Gilford progeria syndrome (HGPS).
In a study comparing normal WT mice to Zmpste24 (Z24) mice, Z24 mice showed significantly more FAPs and fewer MPCs, with a high percentage of senescent FAPs, which negatively impacted the proliferation and muscle formation capabilities of MPCs.
Administering the senolytic drug fisetin successfully reduced senescent FAPs, improved the function of MPCs, and showed promising results in