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    • Impact of Static Myoblast Loading on Protein Secretion Linked to Tenocyte Migration.

    Junhong Li, Xin Zhou,Jialin Chen, Shaochun Zhu, Andre Mateus,Pernilla Eliasson,Paul J. Kingham,Ludvig J. Backman

    Journal of Proteome Research（2025）

    Department of Medical and Translational Biology

    Cited 0|Views0
    Abstract
    Exercise has been shown to promote wound healing, including tendon repair. Myokines released from the exercised muscles are believed to play a significant role in this process. In our previous study, we used an in vitro coculture and loading model to demonstrate that 2% static loading of myoblasts increased the migration and proliferation of cocultured tenocytestwo crucial aspects of wound healing. IGF-1, released from myoblasts in response to 2% static loading, was identified as a contributor to the increased proliferation. However, the factors responsible for the enhanced migration remained unknown. In the current study, we subjected myoblasts in single culture conditions to 2, 5, and 10% static loading and performed proteomic analysis of the cell supernatants. Gene Ontology (GO) analysis revealed that 2% static loading induced the secretion of NBL1, C5, and EFEMP1, which is associated with cell migration and motility. Further investigation by adding exogenous recombinant proteins to human tenocytes showed that NBL1 increased tenocyte migration but not proliferation. This effect was not observed with treatments using C5 and EFEMP1.
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    Key words
    static loading,myokines,tenocyte,wound healing,migration
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