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- W4322773589 abstract "Skeletal muscle injury in peripheral artery disease (PAD) has been attributed to vascular insufficiency, however evidence has demonstrated that muscle cell responses play a role in determining outcomes in limb ischemia. Here, we demonstrate that genetic ablation of Pax7 + muscle progenitor cells (MPCs) in a model of hindlimb ischemia (HLI) inhibited muscle regeneration following ischemic injury, despite a lack of morphological or physiological changes in resting muscle. Compared to control mice (Pax7 WT ), the ischemic limb of Pax7-deficient mice (Pax7 Δ ) was unable to generate significant force 7 or 28 days after HLI. A significant increase in adipose was observed in the ischemic limb 28 days after HLI in Pax7 Δ mice, which replaced functional muscle. Adipogenesis in Pax7 Δ mice corresponded with a significant increase in PDGFRα + fibro/adipogenic progenitors (FAPs). Inhibition of FAPs with batimastat decreased muscle adipose but increased fibrosis. In vitro , Pax7 Δ MPCs failed to form myotubes but displayed increased adipogenesis. Skeletal muscle from patients with critical limb threatening ischemia displayed increased adipose in more ischemic regions of muscle, which corresponded with fewer satellite cells. Collectively, these data demonstrate that Pax7 + MPCs are required for muscle regeneration after ischemia and suggest that muscle regeneration may be an important therapeutic target in PAD." @default.
- W4322773589 created "2023-03-03" @default.
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- W4322773589 date "2023-03-02" @default.
- W4322773589 modified "2023-10-14" @default.
- W4322773589 title "Muscle progenitor cells are required for skeletal muscle regeneration and prevention of adipogenesis after limb ischemia" @default.
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- W4322773589 doi "https://doi.org/10.3389/fcvm.2023.1118738" @default.
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