Hierarchical assembly of nanostructured coating for siRNA-based dual therapy of bone regeneration and revascularization
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2020-03-01
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en
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Biomaterials, Volume 235
Abstract
Advancing bone implant engineering offers the opportunity to overcome crucial medical challenges and improve clinical outcomes. Although the establishment of a functional vascular network is crucial for bone development, its regeneration inside bone tissue has only received limited attention to date. Herein, we utilize siRNA-decorated particles to engineer a hierarchical nanostructured coating on clinically used titanium implants for the synergistic regeneration of skeletal and vascular tissues. Specifically, an siRNA was designed to target the regulation of cathepsin K and conjugated on nanoparticles. The functionalized nanoparticles were assembled onto the bone implant to form a hierarchical nanostructured coating. By regulating mRNA transcription, the coating significantly promotes cell viability and growth factor release related to vascularization. Moreover, microchip-based experiments demonstrate that the nanostructured coating facilitates macrophage-induced synergy in up-regulation of at least seven bone and vascular growth factors. Ovariectomized rat and comprehensive beagle dog models highlight that this siRNA-integrated nanostructured coating possesses all the key traits of a clinically promising candidate to address the myriad of challenges associated with bone regeneration.Description
Keywords
Bone regeneration, Colloidal assembly, Revascularization, siRNA, Surface functionalization
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Citation
Xing, H, Wang, X, Xiao, G, Zhao, Z, Zou, S, Li, M, Richardson, J J, Tardy, B L, Xie, L, Komasa, S, Okazaki, J, Jiang, Q, Yang, G & Guo, J 2020, ' Hierarchical assembly of nanostructured coating for siRNA-based dual therapy of bone regeneration and revascularization ', Biomaterials, vol. 235, 119784 . https://doi.org/10.1016/j.biomaterials.2020.119784