Coprecipitation of DNA-lipid complexes with apatite and comparison with superficial adsorption for gene transfer applications

Yushin Yazaki, Ayako Oyane, Hideo Tsurushima, Hiroko Araki, Yu Sogo, Atsuo Ito, Atsushi Yamazaki

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Apatite can mediate gene transfer into cells by serving as a safe and biocompatible immobilization matrix for DNA and transfection reagents. Recently, an apatite layer that immobilized DNA-lipid complexes was prepared by a coprecipitation process in a supersaturated calcium phosphate solution. This composite layer (DNA-lipid-apatite layer) showed a higher gene transfer capability than an apatite layer with superficially adsorbed DNA-lipid complexes (DNA-lipid-adsorbed apatite layer). In this study, the DNA-lipid-apatite layer and the DNA-lipid-adsorbed apatite layer were compared for their physicochemical properties and gene transfer capabilities. The higher gene transfer capability of the DNA-lipid-apatite layer compared with that of the DNA-lipid-adsorbed apatite layer was reconfirmed by a luciferase assay using epithelial-like CHO-K1 cells. Physicochemical structure analyses showed that the DNA-lipid-apatite layer possessed a larger capacity for DNA-lipid complexes than the DNA-lipid-adsorbed apatite layer. The DNA-lipid-apatite layer released DNA-lipid complexes in a slow and sustained manner, whereas the DNA-lipid-adsorbed apatite layer released them in short bursts. Consequently, the release of DNA-lipid complexes from the DNA-lipid-apatite layer was larger in amount and longer in duration than release from the DNA-lipid-adsorbed apatite layer. This difference in release profiles may be responsible for the higher gene transfer capability of the DNA-lipid-apatite layer compared with that of the DNA-lipid-adsorbed apatite layer. The coprecipitation process and the resulting DNA-lipid-apatite layer have many applications in tissue engineering.

Original languageEnglish
Pages (from-to)937-945
Number of pages9
JournalJournal of Biomaterials Applications
Volume28
Issue number6
DOIs
Publication statusPublished - 2014 Feb 1

Keywords

  • DNA
  • Lipid
  • apatite
  • composite
  • gene transfer

ASJC Scopus subject areas

  • Biomaterials
  • Biomedical Engineering

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