The objective of our studies was to develop a chitosan-based nanoparticle as a potential approach for gene delivery. Chitosan was selected as carrier material and pORF-lacZ as model gene to prepare chitosan-based nanoparticles for gene delivery. Preparation method, physicochemical properties, drug incorporation mechanism, in vitro gene transfection as well as biological safety were studied systemically.Blank chitosan-based nanoparticles were prepared through single coacervation method. The effects of chitos...