Abstract
Muscle stem cells, called satellite cells (SCs), are employed to repair and rebuild muscle. SC-based therapeutic strategies are urgently needed. In this study, weshowed that Lycium barbarum extract (LBE) improved the number of SCs andenhanced muscle regeneration by promoting SC activation and self-renewal in both adult and aging mice. L. barbarum polysaccharide (LBP), the main component of LBE, also played a similar role. More importantly, LBP1C-2, a homogeneous polysaccharide isolated from LBP, was uncovered to be an active component in regulating SC function. Mechanism study revealed that LBP1C-2 might bind to FGFR1 to activate SCs and promote SC self-renewal through Spry1 upregulation. This might be the first study to show that LBE participated in the regulation of SCs, and the active components and targets of LBE were identified. This study lays a theoretical foundation for the medicinal or auxiliary medicinal use of L. barbarum in skeletal muscle.
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