Nano Archive

Selective adhesion and mineral deposition by osteoblasts on carbon nanofiber patterns

Khang, Dongwoo and Sato, Michiko and Price, Rachel L. and Ribbe, Alexander E. and Webster, Thomas J. (2006) Selective adhesion and mineral deposition by osteoblasts on carbon nanofiber patterns. INTERNATIONAL JOURNAL OF NANOMEDICINE, 1 (1). pp. 65-72.

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In an effort to develop better orthopedic implants, osteoblast (bone-forming cells) adhesion was determined on microscale patterns (3 0 gm lines) of carbon nanofibers placed on polymer substrates. Patterns of carbon nanofibers (CNFs) on a model polymer (polycarbonate urethane [PCU]) were developed using an imprinting method that placed CNFs in selected regions. Results showed the selective adhesion and alignment of osteoblasts on CNF patterns placed on PCU. Results also showed greater attraction forces between fibronectin and CNF (compared with PCU) patterns using atomic force microscope force-displacement curves. Because fibronectin is a protein that mediates osteoblast adhesion, these results provide a mechanism of why osteoblast adhesion was directed towards CNF patterns. Lastly, this study showed that the directed osteoblast adhesion on CNF patterns translated to enhanced calcium phosphate mineral deposition along linear patterns of CNFs on PCU. Since CNFs are conductive materials, this study formulated substrates that through electrical stimulation could be used in future investigations to further promote osteoblasts to deposit anisotropic patterns of calcium-containing mineral similar to that observed in long bones.

Item Type:Article
Uncontrolled Keywords:carbon nanotubes; carbon nanofibers; osteoblasts; orthopedic; biomaterials; alignment
Subjects:Material Science > Nanofabrication processes and tools
Biomedical Science > Nanotechnology for human health
Material Science > Bio materials
Material Science > Nanostructured materials
Biomedical Science > Nanomedicine
ID Code:477
Deposited On:04 Dec 2008 15:39
Last Modified:04 Dec 2008 15:39

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