Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/20495
Title: In vitro and in vivo biocompatibility of multi-walled carbon nanotube/biodegradable polymer nanocomposite for bone defects repair
Authors: Li, JL
Yang, Z
Loo, WTY
Xiao, X
Zhang, D
Cheung, MNB
Tsang, WWN 
Ng, ELY
Wang, M
Keywords: Biocompatibility
Bone formation
Bone tissue engineering
Multi-walled carbon nanotubes
Nanocomposites
Osteogenesis
Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)
Issue Date: 2014
Publisher: SAGE Publications Ltd
Source: Journal of bioactive and compatible polymers, 2014, v. 29, no. 4, p. 350-367 How to cite?
Journal: Journal of Bioactive and Compatible Polymers 
Abstract: Biomaterials are extensively used in bone defect recovery caused by bone diseases. Multi-walled carbon nanotubes have been reported to reinforce synthetic polymeric materials. The aim of the study is to test poly(3-hydroxybutyrate-co-3-hydroxyvalerate) loaded with different amounts of multi-walled carbon nanotubes to fabricate nanocomposites. Mechanical, mineralization, and degradation properties were studied in vitro. The proliferation and differentiation of rat bone marrow stem cells were studied to determine biocompatibility in vivo. The incorporation of multi-walled carbon nanotubes greatly increased the mechanical properties of poly(3-hydroxybutyrate- co-3-hydroxyvalerate) and the strongest composite obtained was at 2% multi-walled carbon nanotubes. The 2% nanocomposite also had higher rat bone marrow stem cell adhesion, proliferation, and differentiation characteristics compared to the pure poly(3-hydroxybutyrate-co-3-hydroxyvalerate). The apoptosis in the later stage of rat bone marrow stem cells decreased in the 2% nanocomposites group at different time points. Based on histology and micro-computed tomography tests 6 weeks after in vivo implantation, the 2% multi-walled carbon nanotubes/poly(3-hydroxybutyrate-co-3-hydroxyvalerate) treated animals had a higher volume of bone formation compared to the pure poly(3-hydroxybutyrate-co-3-hydroxyvalerate) group. Thus, the presence of multi-walled carbon nanotubes has an apparent positive effect on poly(3-hydroxybutyrate-co-3-hydroxyvalerate) in assisting osteogenesis.
URI: http://hdl.handle.net/10397/20495
ISSN: 0883-9115
DOI: 10.1177/0883911514533867
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