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Zhou H, Liu H, Lin M, Wang H, Zhou J, Li M, Yang X, Fu G, Liu C. Hyperbaric oxygen promotes bone regeneration by activating the mechanosensitive Piezo1 pathway in osteogenic progenitors. J Orthop Translat 2024; 48:11-24. [PMID: 39170748 PMCID: PMC11338066 DOI: 10.1016/j.jot.2024.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 06/17/2024] [Accepted: 07/03/2024] [Indexed: 08/23/2024] Open
Abstract
Background Hyperbaric oxygen (HBO) therapy is widely used to treat bone defects, but the correlation of high oxygen concentration and pressure to osteogenesis is unclear. Methods Bilateral monocortical tibial defect surgeries were performed on 12-week-old Prrx1-Cre; Rosa26-tdTomato and Prrx1-Cre; Piezo1fl/+ mice. Daily HBO treatment was applied on post-surgery day (PSD) 1-9; and daily mechanical loading on tibia was from PSD 5 to 8. The mice were euthanized on PSD 10, and bone defect repair in their tibias was evaluated using μCT, biomechanical testing, and immunofluorescence deep-tissue imaging. The degree of angiogenesis-osteogenesis coupling was determined through spatial correlation analysis. Bone marrow stromal cells from knockout mice were cultured in vitro, and their osteogenic capacities of the cells were assessed. The activation of genes in the Piezo1-YAP pathway was evaluated using RNA sequencing and quantitative real-time polymerase chain reaction. Results Lineage tracing showed HBO therapy considerably altered the number of Prrx1+ cells and their progeny in a healing bone defect. Using conditional knockdown mice, we found that HBO stimulation activates the Piezo1-YAP axis in Prrx1+ cells and promotes osteogenesis-angiogenesis coupling during bone repair. The beneficial effect of HBO was similar to that of anabolic mechanical stimulation, which also acts through the Piezo1-YAP axis. Subsequent transcriptome sequencing results revealed that similar mechanosensitive pathways are activated by HBO therapy in a bone defect. Conclusion HBO therapy promotes bone tissue regeneration through the mechanosensitive Piezo1-YAP pathway in a population of Prrx1+ osteogenic progenitors. Our results contribute to the understanding of the mechanism by which HBO therapy treats bone defects. The Translational Potential of this Article Hyperbaric oxygen therapy is widely used in clinical settings. Our results show that osteogenesis was induced by the activation of the Piezo1-YAP pathway in osteoprogenitors after HBO stimulation, and the underlying mechanism was elucidated. These results may help improve current HBO methods and lead to the formulation of alternative treatments that achieve the same functional outcomes.
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Affiliation(s)
- Hang Zhou
- Department of Biomedical Engineering, College of Engineering, Southern University of Science and Technology, Engineering Building south 622, 1088 Xueyuan Avenue, Shenzhen, Guangdong, China
- Guangdong Provincial Key Laboratory of Advanced Biomaterials, Southern University of Science and Technology, Engineering Building south 622, 1088 Xueyuan Avenue, Shenzhen, Guangdong, China
| | - Hongzhi Liu
- Department of Biomedical Engineering, College of Engineering, Southern University of Science and Technology, Engineering Building south 622, 1088 Xueyuan Avenue, Shenzhen, Guangdong, China
- Guangdong Provincial Key Laboratory of Advanced Biomaterials, Southern University of Science and Technology, Engineering Building south 622, 1088 Xueyuan Avenue, Shenzhen, Guangdong, China
| | - Minmin Lin
- Department of Biomedical Engineering, College of Engineering, Southern University of Science and Technology, Engineering Building south 622, 1088 Xueyuan Avenue, Shenzhen, Guangdong, China
- Guangdong Provincial Key Laboratory of Advanced Biomaterials, Southern University of Science and Technology, Engineering Building south 622, 1088 Xueyuan Avenue, Shenzhen, Guangdong, China
| | - Hantang Wang
- Department of Biomedical Engineering, College of Engineering, Southern University of Science and Technology, Engineering Building south 622, 1088 Xueyuan Avenue, Shenzhen, Guangdong, China
- Guangdong Provincial Key Laboratory of Advanced Biomaterials, Southern University of Science and Technology, Engineering Building south 622, 1088 Xueyuan Avenue, Shenzhen, Guangdong, China
| | - Jingjing Zhou
- Department of Biomedical Engineering, College of Engineering, Southern University of Science and Technology, Engineering Building south 622, 1088 Xueyuan Avenue, Shenzhen, Guangdong, China
- Guangdong Provincial Key Laboratory of Advanced Biomaterials, Southern University of Science and Technology, Engineering Building south 622, 1088 Xueyuan Avenue, Shenzhen, Guangdong, China
| | - Ming Li
- Department of Rehabilitation Medicine, Shenzhen Children's Hospital, No. 7019 Yitian Road, Futian District, Shenzhen, Guangdong, China
| | - Xue Yang
- Department of Rehabilitation Medicine, Shenzhen Children's Hospital, No. 7019 Yitian Road, Futian District, Shenzhen, Guangdong, China
| | - Guibing Fu
- Department of Pediatric Orthopedics, Shenzhen Children's Hospital, No. 7019 Yitian Road, Futian District, Shenzhen, Guangdong, China
| | - Chao Liu
- Department of Biomedical Engineering, College of Engineering, Southern University of Science and Technology, Engineering Building south 622, 1088 Xueyuan Avenue, Shenzhen, Guangdong, China
- Guangdong Provincial Key Laboratory of Advanced Biomaterials, Southern University of Science and Technology, Engineering Building south 622, 1088 Xueyuan Avenue, Shenzhen, Guangdong, China
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