ArticlebioRxiv : the preprint server for biology2026
FAP-intrinsic Hedgehog signaling controls intramuscular adipogenesis, fibrosis, and myofiber regeneration.
Article in bioRxiv : the preprint server for biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Authors and funding
5 authors.
Funding
Abstract
Fibro/adipogenic progenitors (FAPs) are multipotent stromal cells that support myofiber regeneration, but can also give rise to intramuscular adipose tissue (IMAT) and fibrotic scar tissue. While the Hedgehog pathway suppresses FAP adipogenesis and promotes myofiber repair through ligand Desert Hedgehog, the key cell type that senses this signal has remained unclear. Here, we demonstrate through FAP-specific deletion of the Hedgehog signal transducer Smoothened that FAPs are the primary Hedgehog-responding cells during muscle regeneration. Loss of Smoothened in FAPs increases IMAT, causes persistent fibrosis, reduces the Hedgehog-dependent effectors TIMP3 and GDF10, and impairs myofiber regeneration. FAPs lacking Smoothened also fail to support
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Registered trials
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