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Updated: Nov 24, 2025

Author Spotlight: Advancements in Cell and Tissue Engineering for Tendon Repair
Published on: March 1, 2024
Exosomes derived from tendon stem cells promote cell proliferation and migration through the TGF β signal pathway
Mingda Li1, Jie Jia1, Shanshan Li1
1School of Life and Pharmaceutical Sciences, Dalian University of Technology, Panjin, China.
Abstract:
Tendon stem cells (TSCs) are a kind of progenitor cells found in tendon niches, which play a key role in the repair of tendon injuries. Exosomes that mediate cell communication are involved in physiological processes and various diseases, while the effect of exosomes derived from TSCs (TSC-exo) on TSCs is still unclear. The purpose of this study is to explore the effect of TSC-exo on TSCs. Analyzing the characteristics of TSC-exo, we found that the TSC-exo were enriched in a large amount of transforming growth factor β (TGF β) by western blotting. We also found that the TGF β carried by TSC-exo can effectively accelerate the proliferation and migration of TSCs. We further found that TGF β carried by TSC-exo can activate the TGF β-Smad2/3 and the ERK1/2 signaling pathway in TSCs. Furthermore, matrix metalloenzyme 2 (MMP2), a downstream molecule of Smad2, is regulated by TGF β carried by TSC-exo. Collectively, our findings provide molecular insights into TSC-exo and indicate that TSC-exo are a potential strategy for treating tendon injuries.
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