Intrinsically superparamagnetic Fe-hydroxyapatite nanoparticles positively influence osteoblast-like cell behaviour

Journal of Nanobiotechnology

Research

Clark T Hung¹  Anna Tampieri²  Teresa D’Alessandro²  Monica Sandri²  Maurilio Marcacci³  Silvia Panseri⁴  Carla Cunha⁴  Gianluca Giavaresi⁵ 

[1] Department of Biomedical Engineering, Columbia University, New York, USA;Institute of Science and Technology for Ceramics, National Research Council, Faenza, RA, Italy;Laboratory of Biomechanics and Technology Innovation, Rizzoli Orthopaedic Institute, Bologna, Italy;Laboratory of Biomechanics and Technology Innovation, Rizzoli Orthopaedic Institute, Bologna, Italy;Institute of Science and Technology for Ceramics, National Research Council, Faenza, RA, Italy;Laboratory of Preclinical and Surgical Studies, Rizzoli Orthopaedic Institute, Bologna, Italy;Laboratory of Biocompatibility, Innovative Technologies and Advanced Therapies, Rizzoli Orthopaedic Institute, Bologna, Italy;

关键词: Nanoparticles;    Superparamagnetism;    Hydroxyapatite;    Static magnetic field;    Orthopaedic applications;   

DOI  :  10.1186/1477-3155-10-32

 received in 2012-05-16, accepted in 2012-06-18,  发布年份 2012

来源: Springer

【 摘 要 】

BackgroundSuperparamagnetic nanoparticles (MNPs) have been progressively explored for their potential in biomedical applications and in particular as a contrast agent for diagnostic imaging, for magnetic drug delivery and more recently for tissue engineering applications. Considering the importance of having safe MNPs for such applications, and the essential role of iron in bone remodelling, this study developed and analysed novel biocompatible and bioreabsorbable superparamagnetic nanoparticles, that avoid the use of poorly tolerated magnetite based nanoparticles, for bone tissue engineering applications.ResultsMNPs were obtained by doping hydroxyapatite (HA) with Fe ions, by directly substituting Fe2+ and Fe3+ into the HA structure yielding superparamagnetic bioactive phase. In the current study, we have investigated the effects of increasing concentrations (2000 μg/ml; 1000 μg/ml; 500 μg/ml; 200 μg/ml) of FeHA MNPs in vitro using Saos-2 human osteoblast-like cells cultured for 1, 3 and 7 days with and without the exposure to a static magnetic field of 320 mT. Results demonstrated not only a comparable osteoblast viability and morphology, but increased in cell proliferation, when compared to a commercially available Ha nanoparticles, even with the highest dose used. Furthermore, FeHA MNPs exposure to the static magnetic field resulted in a significant increase in cell proliferation throughout the experimental period, and higher osteoblast activity.In vivo preliminary results demonstrated good biocompatibility of FeHA superparamagnetic material four weeks after implantation into a critical size lesion of the rabbit condyle.ConclusionsThe results of the current study suggest that these novel FeHA MNPs may be particularly relevant for strategies of bone tissue regeneration and open new perspectives for the application of a static magnetic field in a clinical setting of bone replacement, either for diagnostic imaging or magnetic drug delivery.

【 授权许可】

CC BY   
© Panseri et al.; licensee BioMed Central Ltd. 2012