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Augmenting osteoporotic bone regeneration through a hydrogel-based rejuvenating microenvironment

Bioactive Materials 2024年第11期41卷 440-454页

作者： Xiaoting Zhang Boguang Yang Lu Feng Xiayi Xu Chenmin Wang Yuk-wai Lee Ming Wang Xuan Lu Ling Qin Sien Lin Liming Bian Gang Li Musculoskeletal Research Laboratory Department of Orthopaedics&TraumatologyThe Chinese University of Hong KongPrince of Wales HospitalHong KongChina Stem Cells and Regenerative Medicine Laboratory Li Ka Shing Institute of Health SciencesThe Chinese University of Hong KongPrince of Wales HospitalHong KongChina The CUHK-ACC Space Medicine Centre on Health Maintenance of Musculoskeletal System The Chinese University of Hong Kong Shenzhen Research InstituteShenzhenPR China SH Ho Scoliosis Research Laboratory Department of Orthopaedics and TraumatologyThe Chinese University of Hong KongHong KongChina Joint Scoliosis Research Center of the Chinese University of Hong Kong and Nanjing University The Chinese University of Hong KongHong KongChina Li Ka Shing Institute of Health Sciences The Chinese University of Hong KongChina School of Biomedical Sciences and Engineering Guangzhou International CampusSouth China University of TechnologyGuangzhou511442PR China Department of Orthopaedics and Traumatology The University of Hong KongHong KongChina

Osteoporotic bone defects pose a significant challenge for bone regeneration as they exhibit impaired healing capacity and delayed healing *** address this issue,this study introduces a hydrogel that creates a rejuvenating microenvironment,thereby facilitating efficient bone repair during the initial two weeks following bone defect *** hydrogel,named GelHFS,was created through host-guest polymerization of gelatin and acrylatedβ-*** of the human fetal mesenchymal stem cell secretome(HFS)formed GelHFS hydrogel aimed at mimicking a rejuvenated stem cell *** results demonstrated that GelHFS hydrogel promotes cell stellate spreading and osteogenic differentiation via integrinβ1-induced focal adhesion *** of GelHFS hydrogel in an osteoporotic bone defect rat model recruited endogenous integrinβ1-expressing cells and enhanced new bone formation and bone *** findings reveal that GelHFS hydrogel provides a rejuvenating niche for endogenous MSCs and enhances bone regeneration in osteoporotic bone *** findings highlight the potential of GelHFS hydrogel as an effective therapeutic strategy for addressing challenging bone healing such as osteoporotic bone regeneration.

关键词： Osteoporotic bone defects Bone regeneration Rejuvenating microenvironment Secretome focal adhesion pathway

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