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- W4313559623 abstract "Abstract Background Tendinopathy is the leading sports-related injury and will cause severe weakness and tenderness. Effective therapy for tendinopathy remains limited, and extracellular vesicles (EVs) derived from adipose tissue-derived mesenchymal stem cells (ADMSCs) have demonstrated great potential in tendinopathy treatment; however, the influence of aging status on EV treatment has not been previously described. Results In this study, it was found that ADMSCs derived from old mice (ADMSC old ) demonstrated remarkable cellular senescence and impaired NAD+ metabolism compared with ADMSCs derived from young mice (ADMSC young ). Lower NAMPT contents were detected in both ADMSC old and its secreted EVs (ADMSC old -EVs). Advanced animal experiments demonstrated that ADMSC young -EVs, but not ADMSC old -EVs, alleviated the pathological structural, functional and biomechanical properties in tendinopathy mice. Mechanistic analyses demonstrated that ADMSC young -EVs improved cell viability and relieved cellular senescence of tenocytes through the NAMPT/SIRT1/PPARγ/PGC-1α pathway. ADMSC young -EVs, but not ADMSC old -EVs, promoted phagocytosis and M2 polarization in macrophages through the NAMPT/SIRT1/Nf-κb p65/NLRP3 pathway. The macrophage/tenocyte crosstalk in tendinopathy was influenced by ADMSC young -EV treatment and thus it demonstrated One-Stone-Two-Birds effects in tendinopathy treatment. Conclusions This study demonstrates an effective novel therapy for tendinopathy and uncovers the influence of donor age on curative effects by clarifying the detailed biological mechanism. Graphical Abstract" @default.
- W4313559623 created "2023-01-06" @default.
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- W4313559623 date "2023-01-05" @default.
- W4313559623 modified "2023-09-26" @default.
- W4313559623 title "NAMPT encapsulated by extracellular vesicles from young adipose-derived mesenchymal stem cells treated tendinopathy in a “One-Stone-Two-Birds” manner" @default.
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- W4313559623 doi "https://doi.org/10.1186/s12951-022-01763-5" @default.
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