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Updated: Mar 24, 2026
Molecular Analysis of Endothelial-mesenchymal Transition Induced by Transforming Growth Factor-β Signaling
Published on: August 3, 2018
Effect of transforming growth factor-β3 on the expression of Smad3 and Smad7 in tenocytes
Ke Jiang1, Guo Chun2, Ziming Wang3
1Department of Orthopedics, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan 637000, P.R. China.
Abstract:
Tendon adhesion is a common problem in the healing of injured tendons. The molecular mechanisms of the TGF-β/Smad signaling pathway have been determined, and the role of TGF-β has been well characterized in wound healing. However, the intracellular mechanism or downstream signals by which TGF-β3 modulates its effects on tendon healing have not been well elucidated. The aim of this study was to determine the effect of TGF‑β3 on the TGF-β/Smad signaling pathway in tenocytes. Quantitative polymerase chain reaction and western blot analysis were used to analyze the effect of TGF‑β3 on the regulation of the expression of Smad proteins in tenocytes. The results demonstrated that TGF‑β3 has no significant effect on the proliferation of tendon cells. The addition of TGF‑β3 to tenocytes can significantly downregulate the expression of Smad3 and upregulate the expression of Smad7 at the gene and protein levels. The results demonstrate that TGF‑β3 may regulate Smad3 and Smad7 proteins through the TGF-β/Smad signaling pathway to minimize extrinsic scarring. Thus, it may provide a novel approach to decrease tendon adhesion and promote tendon healing.
Insights
Transforming growth factor-beta 3 (TGF-β3) influences tendon healing by modulating the TGF-β/Smad pathway. This study shows TGF-β3 downregulates Smad3 and upregulates Smad7 in tenocytes, potentially reducing tendon adhesion.
Area of Science:
- Biomedical Engineering
- Regenerative Medicine
- Cell Biology
Background:
- Tendon adhesion is a frequent complication following tendon injury, impacting healing outcomes.
- The transforming growth factor-beta (TGF-β)/Smad signaling pathway is crucial in wound healing, but its specific role in tendon healing requires further elucidation.
- The intracellular mechanisms by which TGF-β3 influences tendon healing remain incompletely understood.
Purpose of the Study:
- To investigate the effect of transforming growth factor-beta 3 (TGF-β3) on the TGF-β/Smad signaling pathway in tenocytes.
- To elucidate the downstream molecular targets of TGF-β3 in the context of tendon healing.
Main Methods:
- Tenocytes were treated with TGF-β3.
- Quantitative polymerase chain reaction (qPCR) was employed to assess gene expression levels of Smad proteins.
- Western blot analysis was utilized to evaluate protein expression levels of Smad proteins.
Main Results:
- TGF-β3 did not significantly affect tenocyte proliferation.
- TGF-β3 significantly downregulated the expression of Smad3 at both the gene and protein levels.
- TGF-β3 significantly upregulated the expression of Smad7 at both the gene and protein levels.
Conclusions:
- TGF-β3 modulates the TGF-β/Smad signaling pathway in tenocytes by downregulating Smad3 and upregulating Smad7.
- These modulations suggest a potential mechanism for TGF-β3 in minimizing extrinsic scarring during tendon healing.
- Targeting the TGF-β/Smad pathway with TGF-β3 may offer a novel therapeutic strategy to reduce tendon adhesion and enhance tendon repair.
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