Abstract
Background:
Implantation of bone marrow mesenchymal stem cells (BMSCs) is a potential alternative for promoting bone defects healing or osseointegration in osteoporosis. However, the reactive oxygen species (ROS) accumulated and excessive inflammation in the osteoporotic microenvironment could weaken the self-replication and multi-directional differentiation of transplanted BMSCs.
Methods:
In this study, to improve the hostile microenvironment in osteoporosis, Poloxamer 407 and hyaluronic acid (HA) was crosslinked to synthetize a thermos-responsive and injectable hydrogel to load MnO2 nanoparticles as a protective carrier (MnO2@Pol/HA hydrogel) for delivering BMSCs.
Results:
The resulting MnO2@Pol/HA hydrogel processed excellent biocompatibility and durable retention time, and can eliminate accumulated ROS effectively, thereby protecting BMSCs from ROS-mediated inhibition of cell viability, including survival, proliferation, and osteogenic differentiation. In osteoporotic bone defects, implanting of this BMSCs incorporated MnO2@Pol/HA hydrogel significantly eliminated ROS level in bone marrow and bone tissue, induced macrophages polarization from M1 to M2 phenotype, decreased the expression of pro-inflammatory cytokines (e.g., TNF-α, IL-1β, and IL-6) and osteogenic related factors (e.g., TGF-β and PDGF).
Conclusion:
This hydrogel-based BMSCs protected delivery strategy indicated better bone repair effect than BMSCs delivering or MnO2@Pol/HA hydrogel implantation singly, which providing a potential alternative strategy for enhancing osteoporotic bone defects healing.
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Data availability
The data that support the findings of this study are accessible from the corresponding author upon reasonable request.
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Acknowledgements
This work was supported by the Foundation of Guangdong Basic and Applied Basic Research Foundation (2022A1515140046 & 2022A1515140151 & 2022A1515140071) and Huizhou Priority Clinical Speciality Cultivation Project (Orthopedics and Sports Medicine) and Scientific Research Projects of Guangdong Provincial Bureau of Traditional Chinese Medicine (20221400 & 20222241) and Research and Innovation Fund of Huizhou First Hospital (2022ZD001 & 2022ZD002) and Huizhou Science and Technology Project (2022CZ010146 & 2022CZ010423).
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Ye, Y., Zhong, H., Huang, S. et al. Reactive Oxygen Species Scavenging Hydrogel Regulates Stem Cell Behavior and Promotes Bone Healing in Osteoporosis. Tissue Eng Regen Med 20, 981–992 (2023). https://doi.org/10.1007/s13770-023-00561-w
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DOI: https://doi.org/10.1007/s13770-023-00561-w