Related Experiment Video
Updated: Mar 10, 2026
14:04
Applying a Three-dimensional Uniaxial Mechanical Stimulation Bioreactor System to Induce Tenogenic Differentiation of Tendon-Derived Stem Cells
Published on: August 1, 2020
6.4K
The Secretome From Mechanically Loaded Myoblasts Enhances Tenocyte-Mediated Wound Healing in a 3D In Vitro Tendon
Junhong Li1,2, Paula Milena Giraldo-Osorno1, Christer Thomsen3
1Department of Medical and Translational Biology, Umeå University, Umeå, Sweden.
Summary
Muscle secretome from exercise enhances tendon healing. This study shows that factors released by muscle cells during simulated exercise promote key healing markers in tendon constructs, suggesting new therapeutic approaches.
Area of Science:
- Biomedical Engineering
- Regenerative Medicine
- Cell Biology
Background:
- Exercise traditionally promotes tendon healing via mechanical loading.
- Skeletal muscle releases bioactive factors (secretome) during exercise.
- Muscle secretome's role in tendon healing is largely unexplored.
Purpose of the Study:
- To investigate if muscle-derived secretome contributes to tendon healing.
- To test the hypothesis that exercise-induced muscle secretome enhances tendon repair.
Main Methods:
- Mechanical loading applied to cultured myoblasts (muscle cells) in vitro.
- Secretome from loaded myoblasts applied to 3D tendon constructs.
- Assessed tendon healing markers: cell area, tenocyte marker SCX, collagen production.
Main Results:
- Secretome from 2% statically loaded myoblasts significantly promoted tendon healing.
- Increased cell-covered area and scleraxis (SCX) expression observed.
- Elevated Type I and III collagen production at Day 7, with reduced Type III at Day 14.
Conclusions:
- Muscle-derived secretome from exercise actively promotes tendon healing.
- Findings support the therapeutic potential of muscle secretome for tendon repair.
- Suggests novel strategies for rehabilitation and regenerative medicine.
