title: Fibronectin-DNA-apatite composite layer for highly efficient and area-specific gene transfer.
abstract: In 2004, Shen et al. developed a safe and efficient gene transfer system using a DNA-apatite composite layer. We have recently succeeded in improving further the gene transfer efficiency by immobilizing a cell adhesion molecule laminin, in a DNA-apatite composite layer. In this study, we showed that not only laminin but fibronectin immobilized in a DNA-apatite composite layer enhances cell adhesion and cell spreading on the layer, thereby markedly improving the gene transfer efficiency. Therefore, the immobilization of a cell adhesion molecule in a DNA-apatite composite layer is crucial for improving the gene transfer efficiency. By using fibronectin instead of laminin and optimizing the condition to prepare the fibronectin-DNA-apatite composite layer, the amount (weight) of cell adhesion molecule required was reduced to approximately one-fourth while retaining the relatively high gene transfer efficiency. It was also shown that the resulting fibronectin-DNA-apatite composite layer prepared under the optimized condition mediated the area-specific gene transfer on its surface, that is, DNA was preferentially transferred to the cells adhering to the surface of the fibronectin-DNA-apatite composite layer. The present gene transfer system with potential for area-specific transfection and advantages of safety and relatively high efficiency would be useful in tissue engineering applications, gene therapy, and production of transfection microarrays.
authors.affiliation: Nanotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan. a-oyane@aist.go.jp
authors.forename: Ayako
authors.initials: A
authors.lastname: Oyane
authors.forename: Masami
authors.initials: M
authors.lastname: Murayama
authors.forename: Atsushi
authors.initials: A
authors.lastname: Yamazaki
authors.forename: Yu
authors.initials: Y
authors.lastname: Sogo
authors.forename: Atsuo
authors.initials: A
authors.lastname: Ito
authors.forename: Hideo
authors.initials: H
authors.lastname: Tsurushima
mesh_terms: D000818:Animals; D001031:Apatites; D016466:CHO Cells; D006224:Cricetinae; D003412:Cricetulus; D004247:DNA / Q000737:chemistry*; D005353:Fibronectins / Q000737:chemistry*; D018014:Gene Transfer Techniques; D008855:Microscopy, Electron, Scanning; D014961:X-Ray Diffraction
chemical_list: D001031:Apatites; D005353:Fibronectins; D004247:DNA