title: [Aspirin-PEI-beta-CyD as a novel non-viral vector for gene transfer].
abstract: To develop a novel non-viral gene delivery vector based on PEI-beta-CyD as backbone modified with aspirin, and to identify its physicochemical characters.
  
  
  
  1, 1-carbonyldiimidazole (CDI) was used to bind aspirin onto PEI-beta-CyD to form PEI-beta-CyD-ASP. (1)H-NMR, FT-IR, UV and XRD were used to confirm the polymer structure. The ability of condensation was demonstrated by gel retardation assay. MTT assay was used to test the cell viability in B16, Hela and A293 cell lines. Transfection efficiency of the polymer was tested in B16 cells.
  
  
  
  The structure of PEI-beta-CyD-ASP was confirmed by (1)H-NMR, FT-IR, UV and XRD, which efficiently condensed plasmid DNA at the N/P ratio of 4. The copolymer showed low cytotoxicity and high transfection efficiency in B16 cells.
  
  
  
  The synthesized aspirin-PEI-beta-CyD might be a potential gene delivery vector.
authors.affiliation: Institute of Chemical Biology and Pharmaceutical Chemistry, Zhejiang University, Hangzhou 310028, China.
authors.forename: Zhong-Ren
authors.initials: ZR
authors.lastname: Wang
authors.forename: Dan
authors.initials: D
authors.lastname: Chen
authors.forename: Jun
authors.initials: J
authors.lastname: Zhou
authors.forename: Gu-Ping
authors.initials: GP
authors.lastname: Tang
mesh_terms: D001241:Aspirin / Q000737:chemistry*; D002460:Cell Line; D018014:Gene Transfer Techniques; D015316:Genetic Therapy / Q000379:methods; D006801:Humans; D011094:Polyethyleneimine / Q000737:chemistry*; D047392:beta-Cyclodextrins / Q000737:chemistry*
chemical_list: D047392:beta-Cyclodextrins; D011094:Polyethyleneimine; C031215:betadex; D001241:Aspirin