» Articles » PMID: 38943181

Platelet-derived Exosomes Alleviate Tendon Stem/progenitor Cell Senescence and Ferroptosis by Regulating AMPK/Nrf2/GPX4 Signaling and Improve Tendon-bone Junction Regeneration in Rats

Overview
Publisher Biomed Central
Specialty Orthopedics
Date 2024 Jun 29
PMID 38943181
Authors
Affiliations
Soon will be listed here.
Abstract

Background: Tendon stem/progenitor cell (TSPC) senescence contributes to tendon degeneration and impaired tendon repair, resulting in age-related tendon disorders. Ferroptosis, a unique iron-dependent form of programmed cell death, might participate in the process of senescence. However, whether ferroptosis plays a role in TSPC senescence and tendon regeneration remains unclear. Recent studies reported that Platelet-derived exosomes (PL-Exos) might provide significant advantages in musculoskeletal regeneration and inflammation regulation. The effects and mechanism of PL-Exos on TSPC senescence and tendon regeneration are worthy of further study.

Methods: Herein, we examined the role of ferroptosis in the pathogenesis of TSPC senescence. PL-Exos were isolated and determined by TEM, particle size analysis, western blot and mass spectrometry identification. We investigated the function and underlying mechanisms of PL-Exos in TSPC senescence and ferroptosis via western blot, real-time quantitative polymerase chain reaction, and immunofluorescence analysis in vitro. Tendon regeneration was evaluated by HE staining, Safranin-O staining, and biomechanical tests in a rotator cuff tear model in rats.

Results: We discovered that ferroptosis was involved in senescent TSPCs. Furthermore, PL-Exos mitigated the aging phenotypes and ferroptosis of TSPCs induced by t-BHP and preserved their proliferation and tenogenic capacity. The in vivo animal results indicated that PL-Exos improved tendon-bone healing properties and mechanical strength. Mechanistically, PL-Exos activated AMPK phosphorylation and the downstream nuclear factor erythroid 2-related factor 2 (Nrf2)/glutathione peroxidase 4 (GPX4) signaling pathway, leading to the suppression of lipid peroxidation. AMPK inhibition or GPX4 inhibition blocked the protective effect of PL-Exos against t-BHP-induced ferroptosis and senescence.

Conclusion: In conclusion, ferroptosis might play a crucial role in TSPC aging. AMPK/Nrf2/GPX4 activation by PL-Exos was found to inhibit ferroptosis, consequently leading to the suppression of senescence in TSPCs. Our results provided new theoretical evidence for the potential application of PL-Exos to restrain tendon degeneration and promote tendon regeneration.

Citing Articles

A nutrigeroscience approach: Dietary macronutrients and cellular senescence.

Calubag M, Robbins P, Lamming D Cell Metab. 2024; 36(9):1914-1944.

PMID: 39178854 PMC: 11386599. DOI: 10.1016/j.cmet.2024.07.025.

References
1.
Ding H, Chen S, Pan X, Dai X, Pan G, Li Z . Transferrin receptor 1 ablation in satellite cells impedes skeletal muscle regeneration through activation of ferroptosis. J Cachexia Sarcopenia Muscle. 2021; 12(3):746-768. PMC: 8200440. DOI: 10.1002/jcsm.12700. View

2.
Wang H, Dai G, Li Y, Chen M, Lu P, Zhang Y . Targeting Senescent Tendon Stem/Progenitor Cells to Prevent or Treat Age-Related Tendon Disorders. Stem Cell Rev Rep. 2022; 19(3):680-693. DOI: 10.1007/s12015-022-10488-9. View

3.
Yang W, Ding N, Luo R, Zhang Q, Li Z, Zhao F . Exosomes from young healthy human plasma promote functional recovery from intracerebral hemorrhage via counteracting ferroptotic injury. Bioact Mater. 2023; 27:1-14. PMC: 10060149. DOI: 10.1016/j.bioactmat.2023.03.007. View

4.
Jenkins N, James S, Salim A, Sumardy F, Speed T, Conrad M . Changes in ferrous iron and glutathione promote ferroptosis and frailty in aging . Elife. 2020; 9. PMC: 7373428. DOI: 10.7554/eLife.56580. View

5.
Han C, Na Y, Zhu Y, Kong L, Eerdun T, Yang X . Is platelet-rich plasma an ideal biomaterial for arthroscopic rotator cuff repair? A systematic review and meta-analysis of randomized controlled trials. J Orthop Surg Res. 2019; 14(1):183. PMC: 6585122. DOI: 10.1186/s13018-019-1207-9. View