title: Electrospun fibrous web of collagen-apatite precipitated nanocomposite for bone regeneration.
abstract: Electrospinning is regarded as a facile tool to generate biomaterials into a nanofibrous structure. Herein a nanofibrous web constituted of collagen and hydroxyapatite (HA) was produced from their co-precipitated nanocomposite solution by using the electrospinning method. The co-precipitated sol was freeze-dried and the dried product was dissolved in an organic solvent for the electrospinning. The electrospun web showed a well-developed nanofibrous structure with HA contents of up to 20 wt%. The internal structure of the collagen-20 wt%HA nanofiber revealed highly elongated apatite nanocrystallines precipitated within the collagen matrix. However, above the HA content of 30 wt% the nanofibrous structure could not be preserved due to the formation of beads. The MC3T3-E1 osteoblastic cells were shown to adhere and grow actively on the collagen-HA nanofibrous web. The alkaline phosphatase (ALP) activity expressed by the cells on the collagen-20 wt%HA nanofiber was lower at day 7, but was higher at day 14 than that on the pure collagen nanofiber. Based on the study, the newly-developed collagen-HA nanofiber may be useful as a cell supporting substrate in bone regeneration area.
authors: School of Materials Science and Engineering, Seoul National University, Seoul 151-744, Korea.
authors: Ju-Ha
authors: JH
authors: Song
authors: Hyoun-Ee
authors: HE
authors: Kim
authors: Hae-Won
authors: HW
authors: Kim
mesh_terms: D016475:3T3 Cells; D000818:Animals; D001031:Apatites / Q000737:chemistry*; D001861:Bone Regeneration; D003094:Collagen / Q000737:chemistry*; D051379:Mice; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D053761:Nanocomposites
chemical_list: D001031:Apatites; D003094:Collagen