title: [Peptide MC10 mediated PEI-beta-CyD as a gene delivery vector targeting to Her-2 receptor].
abstract: To develop a novel non-viral gene delivery vector based on polyethylenimine and beta-cyclodextrin targeting to Her-2 receptor (MC10-PEI-beta-CyD).
  
  
  
  The PEI-beta-CyD was synthesized by low molecular weight polyethylenimine (PEI, Mw 600) cross-linked beta-cyclodextrin (beta-CyD) via N, N-carbonyldiimidazole (CDI). The chemical linker[N-succinimidy-3-(2-pyridyldithio) propionate, SPDP] was used to bind peptide MC10 (MARAKEGGGC) to PEI-beta-CyD to form the vector MC10-PEI-beta-CyD. The (1)H-NMR was used to confirm the structure of vector. The DNA condensing ability,and the particle size of MC10-PEI-beta-CyD/DNA complexes were demonstrated by gel retardation assay and electron microscope observation (TEM). Cell viability was tested by MTT assay. The transfection efficiency was determined on cultured SKOV-3, A549 and MCF-7 cells.
  
  
  
  MC10 was linked onto PEI-beta-CyD successfully. The vector was able to condense DNA at N/P ratio of 5 and particle size was about (170 +/-35)nm. The vector showed low cytotoxicity and high transfection efficiency in cultured SKOV-3, A549 and MCF-7 cells.
  
  
  
  A novel non-viral vector MC10-PEI-beta-CyD with low cytotoxicity and high transfection efficiency has been successfully synthesized.
authors.affiliation: Institute of Chemical Biology and Pharmaceutical Chemistry, Zhejiang University, Hangzhou 310028, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Liu
authors.forename: Yi-Ping
authors.initials: YP
authors.lastname: Hu
authors.forename: Qi-Ying
authors.initials: QY
authors.lastname: Jiang
authors.forename: Dan
authors.initials: D
authors.lastname: Chen
authors.forename: Hai
authors.initials: H
authors.lastname: Yu
authors.forename: Qing-Qing
authors.initials: QQ
authors.lastname: Wang
authors.forename: Gu-Ping
authors.initials: GP
authors.lastname: Tang
mesh_terms: D002460:Cell Line; D018390:Gene Targeting; D018014:Gene Transfer Techniques; D005822:Genetic Vectors; D006801:Humans; D010455:Peptides / Q000737:chemistry*; D011094:Polyethyleneimine / Q000737:chemistry* / Q000494:pharmacology; D018719:Erb-b2 Receptor Tyrosine Kinases / Q000235:genetics*; D047392:beta-Cyclodextrins / Q000737:chemistry*
chemical_list: D010455:Peptides; D011094:Polyethyleneimine; D018719:Erb-b2 Receptor Tyrosine Kinases; D047392:beta-Cyclodextrins; C031215:betadex