title: A facile approach to construct hyaluronic acid shielding polyplexes with improved stability and reduced cytotoxicity.
abstract: A facile approach for polymer gene carriers was used to construct hyaluronic acid (HA) shielding polyplexes due to the electrostatic interaction. By adding HA to PEI/DNA complexes, the ξ-potential of ternary polyplexes was changed from positive to negative. Spherical particles with diameter about 250nm were observed. Ethidium bromide exclusion assay indicated that the electrostatic complexation was loosened after addition of HA. However, DNA disassembly did not occur. The proper reason was that the intensity of negative charges was not strong enough to release DNA from the complexes in our experiment. The stability of PEI/DNA/HA polyplexes in physiological condition was improved and the cytotoxicity was reduced. Comparing with PEI/DNA polyplexes, the uptake and transfection efficiency of HA shielding polyplexes was lower for HEK293T cells probably due to the reduced adsorptive endocytosis, whereas it was higher for HepG2 cells due to HA receptor mediated endocytosis. This facile approach to constructing HA shielding polyplexes might have great potential application in non-viral gene delivery research and tumor therapy.
authors.affiliation: MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, PR China. yx wang@zju.edu.cn
authors.forename: Youxiang
authors.initials: Y
authors.lastname: Wang
authors.forename: Zhixue
authors.initials: Z
authors.lastname: Xu
authors.forename: Ran
authors.initials: R
authors.lastname: Zhang
authors.forename: Wenyu
authors.initials: W
authors.lastname: Li
authors.forename: Lu
authors.initials: L
authors.lastname: Yang
authors.forename: Qiaoling
authors.initials: Q
authors.lastname: Hu
mesh_terms: D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D002478:Cells, Cultured; D004355:Drug Stability; D018014:Gene Transfer Techniques; D006801:Humans; D006820:Hyaluronic Acid / Q000737:chemistry* / Q000493:pharmacokinetics* / Q000494:pharmacology; D018625:Microscopy, Atomic Force; D011108:Polymers / Q000737:chemistry* / Q000493:pharmacokinetics / Q000494:pharmacology
chemical_list: D011108:Polymers; D006820:Hyaluronic Acid