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    Cell responses and hemocompatibility of g-HA/PLA composites

    181115_50705_Pub_66203.pdf (1.123Mb)
    Access Status
    Open access
    Authors
    Li, J.
    Zheng, W.
    Zheng, Y.
    Lou, Xia
    Date
    2011
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Li, Jia and Zheng, Wei and Zheng, Yufeng and Lou, Xia. 2011. Cell responses and hemocompatibility of g-HA/PLA composites. Science China Life Sciences. 54 (4): pp. 366-371.
    Source Title
    Science China Life Sciences
    DOI
    10.1007/s11427-011-4155-0
    ISSN
    18691889
    School
    Department of Chemical Engineering
    Remarks

    This article is published under the Open Access publishing model and distributed under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/3.0/ Please refer to the licence to obtain terms for any further reuse or distribution of this work.

    URI
    http://hdl.handle.net/20.500.11937/27610
    Collection
    • Curtin Research Publications
    Abstract

    The objective of this study was to investigate the hemocompatibility and cell responses to some novel poly(L-lactide) (PLA) composites containing surface modified hydroxyapatite particles for potential applications as a bone substitute material. The surface of hydroxyapatite (HA) particles was first grafted with L-lactic acid oligomers to form grafted HA (g-HA) particles. The g-HA particles were further blended with PLA to prepare g-HA/PLA composites. Our previous study has shown significant improvement in tensile properties of these materials due to the enhanced interfacial adhesion between the polymer matrix and HA particles. To further investigate the potential applications of these composites in bone repair and other orthopedic surgeries, a series of in vitro and in vivo experiments were conducted to examine the cell responses and hemocompatibility of the materials. In vitro experiments showed that the g-HA/PLA composites were well tolerated by the L-929 cells. Hemolysis of the composites was lower than that of pure PLA. Subcutaneous implantation demonstrated that the g-HA/PLA composites were more favorable than the control materials for soft tissue responses. The results suggested that the g-HA/PLA composites are promising and safe materials with potential applications in tissue engineering.

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