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In vitro and in vivo studies of a novel nanohydroxyapatite/superhydrophilic vertically aligned carbon nanotube nanocomposites

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Abstract

An association between in vitro and in vivo studies has been demonstrated for the first time, using a novel nanohydroxyapatite/superhydrophilic vertically aligned multiwalled carbon nanotube (nHAp/VAMWCNT-O2) nanocomposites. Human osteoblast cell culture and bone defects were used to evaluate the in vitro extracellular matrix (ECM) calcification process and bone regeneration, respectively. The in vitro ECM calcification process of nHAp/VAMWCNT-O2 nanocomposites were investigated using alkaline phosphatase assay. The in vivo biomineralization studies were carried out on bone defects of C57BL/6/JUnib mice. Scanning electron microscopy, micro-energy dispersive spectroscopy, X-ray photoelectron spectroscopy, and X-ray difractometry analyses confirmed the presence of the nHAp crystals. nHAp/VAMWCNT-O2 nanocomposites induced in vitro calcification of the ECM of human osteoblast cells in culture after only 24 h. Bone regeneration with lamellar bone formation after 9 weeks was found in the in vivo studies. Our findings make these new nanocomposites very attractive for application in bone tissue regeneration.

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Acknowledgments

The authors thank the Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (2011/17877-7), (2011/20345-7), CAPES and FVE for financial support, and to everyone form Laboratory of Biomedical Nanotechnology for all support in the procedures. Special thanks to Priscila Leite for scanning electron microscopy images and Alene Alder-Rangel for English revisions.

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Authors and Affiliations

  1. Laboratory of Biomedical Nanotechnology (NANOBIO), Universidade do Vale do Paraiba (UNIVAP), Av. Shishima Hifumi 2911, Sao Jose dos Campos, SP, 12224-000, Brazil

    Anderson Oliveira Lobo, Idalia A. W. B. Siqueira, Marcele F. das Neves & Fernanda Roberta Marciano

  2. Associated Laboratory for Sensors and Materials (LAS), National Institute for Space Research (INPE), Av. dos Astronautas 1758, Sao Jose dos Campos, SP, 12227-010, Brazil

    Marcus Alexandre F. Corat

  3. Centro Multidisciplinar para Investigação Biologica (CEMIB), Universidade Estadual de Campinas (UNICAMP), Rua 5 de Junho, s/n, Cidade Universitaria, Campinas, SP, 13083-877, Brazil

    Evaldo Jose Corat

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  1. Anderson Oliveira Lobo
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  2. Idalia A. W. B. Siqueira
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  3. Marcele F. das Neves
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  4. Fernanda Roberta Marciano
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  5. Evaldo Jose Corat
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  6. Marcus Alexandre F. Corat
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Correspondence to Anderson Oliveira Lobo.

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Lobo, A.O., Siqueira, I.A.W.B., das Neves, M.F. et al. In vitro and in vivo studies of a novel nanohydroxyapatite/superhydrophilic vertically aligned carbon nanotube nanocomposites. J Mater Sci: Mater Med 24, 1723–1732 (2013). https://doi.org/10.1007/s10856-013-4929-y

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  • DOI: https://doi.org/10.1007/s10856-013-4929-y

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