期刊
ACS BIOMATERIALS SCIENCE & ENGINEERING
卷 5, 期 1, 页码 262-271出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsbiomaterials.8b00871
关键词
calcium phosphate cement; chondroitin sulfate; injectability; osteogenesis
资金
- National Key Research and Development Program of China [2016YFB0700803]
- National Natural Science Foundation of China [51672087]
- Science and Technology Program of Guangzhou City of China [201508020017]
- China Postdoctoral Science Foundation [2016M602601, 2018T110926]
Toward repairing critical-sized bone defects, calcium phosphate cement (CPC) has been well recognized as a fairly promising bone graft because of its properties of injectability, self-setting, biocompatibility, and osteoconductivity. However, poor osteogenic capacity of CPC still limits its applications for meeting the demands of bone healing. In this work, chondroitin sulfate (CS), as an important component of the extracellular matrix network, was introduced into CPC to enhance its osteogenesis ability. Incorporation of CS had no evident effect on the phase, morphology, apparent porosity, and compressive strength of hydrated cement products, but it notably enhanced the injectability and improved the antiwashout property of the cement pastes. CS was able to be sustainably released from CS-CPCs in a CS-dose-dependent manner and supposed to have a long-term release potential for constant biological stimulation. CS-CPCs markedly accelerated the preferential adsorption of fibronectin. Furthermore, CS-CPCs significantly improved the adhesion, proliferation, and osteogenic differentiation of bone mesenchymal stem cells, which was synergistically mediated by the adhesion events of cells on the hydrated cements and the stimulation effects of CS molecules. Herein, utilization of CS is supposed to endow injectable calcium phosphate bone cements with enhanced osteogenic capacity and suitable physicochemical properties for numerous promising orthopedic applications.
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