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He Y, Li H, Yu Z, Li L, Chen X, Yang A, Lyu F, Dong Y. Exosomal let-7f-5p derived from mineralized osteoblasts promotes the angiogenesis of endothelial cells via the DUSP1/Erk1/2 signaling pathway. J Tissue Eng Regen Med 2022; 16:1184-1195. [PMID: 36348261 DOI: 10.1002/term.3358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 09/30/2022] [Accepted: 10/23/2022] [Indexed: 11/11/2022]
Abstract
Blood vessel formation is the prerequisite for the survival and growth of tissue-engineered bone. Mineralized osteoblasts (MOBs) have been shown to regulate angiogenesis through the secretion of exosomes containing various pro-angiogenic factors. However, whether the mineralized osteoblast-derived exosomes (MOB-Exos) containing let-7f-5p can regulate the angiogenesis of endothelial cells (ECs) is still unknown. In this study, the angiogenic capabilities of ECs respectively treated with MOB-Exos, let-7f-5p mimicked MOB-Exos (miR mimic group), and let-7f-5p inhibited MOB-Exos (miR inhibitor group) were compared through in vitro and in vivo studies. Moreover, the potential mechanism of MOB-Exo let-7f-5p regulating angiogenesis was explored by verifying the role of the Erk1/2 signaling pathway and target gene DUSP1. The results showed that MOB-Exos could significantly promote the angiogenesis of ECs, which could be enhanced by mimicked exosomal let-7f-5p and attenuated by inhibited exosomal let-7f-5p. Let-7f-5p could suppress the luciferase activity of wide-type DUSP1, and the mutation of DUSP1 could abrogate the repressive ability of let-7f-5p. Furthermore, the expression of DUSP1 exhibited a reversed trend to that of pErk1/2. The expression of pErk1/2 was significantly higher in the miR mimic group and lower in the miR inhibitor group than that in the MOB-Exos group, while inhibition of pErk1/2 could partly impair the angiogenic capabilities of ECs. In conclusion, we concluded that exosomal let-7f-5p derived from MOBs could promote the angiogenesis of ECs via activating the DUSP1/Erk1/2 signaling pathway, which might be a promising target for promoting the angiogenesis of tissue-engineered bone.
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Affiliation(s)
- Yiqun He
- Department of Orthopedics, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, China
| | - Hailong Li
- Department of Orthopedics, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, China
| | - Zuochong Yu
- Department of Orthopedics, Jinshan Hospital, Fudan University, Shanghai, China
| | - Linli Li
- Department of Orthopedics, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, China
| | - Xujun Chen
- Department of Orthopedics, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, China
| | - Aolei Yang
- Department of Orthopedics, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, China
| | - Feizhou Lyu
- Department of Orthopedics, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, China.,Department of Orthopedics, Huashan Hospital, Fudan University, Shanghai, China
| | - Youhai Dong
- Department of Orthopedics, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, China
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