title: Synthesis and in vitro evaluation of glutamide-containing cationic lipids for gene delivery.
abstract: A novel series of cationic amphiphiles based on dialkyl glutamides with cationic pyridinium head group were synthesized as potential gene delivery agents. Four cationic lipids with glutamide as linker and varying chain lengths were tested for their transfection efficiency in three cell lines. The DNA-lipid complexes were characterized for their ability to bind to DNA, protection from nuclease digestion, size, zeta-potential, and toxicity. All four lipids demonstrated efficient transfection in MCF-7, COS, and HeLa cells, and the reporter gene expression was much higher with DOPE as the helper lipid in the formulation when compared to cholesterol. Among these 14-carbon lipids, lipid 2 has shown the highest transfection efficiency, complete protection of DNA from nuclease digestion, and low toxicity. Interestingly, lipid 2 has also shown remarkable enhancement in transfection in the presence of serum.
authors.affiliation: Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad, India 500 007.
authors.forename: Vijaya
authors.initials: V
authors.lastname: Gopal
authors.forename: Tekkatte K
authors.initials: TK
authors.lastname: Prasad
authors.forename: Nalam M
authors.initials: NM
authors.lastname: Rao
authors.forename: Makoto
authors.initials: M
authors.lastname: Takafuji
authors.forename: Mohammed M
authors.initials: MM
authors.lastname: Rahman
authors.forename: Hirotaka
authors.initials: H
authors.lastname: Ihara
mesh_terms: D000818:Animals; D002412:Cations / Q000737:chemistry; D002460:Cell Line; D002463:Cell Membrane Permeability; D002470:Cell Survival / Q000187:drug effects; D002522:Chlorocebus aethiops; D003470:Culture Media; D004247:DNA / Q000235:genetics; D018698:Glutamic Acid / Q000031:analogs & derivatives* / Q000737:chemistry; D006801:Humans; D008055:Lipids / Q000737:chemistry* / Q000633:toxicity; D015394:Molecular Structure; D010957:Plasmids / Q000235:genetics; D044967:Serum; D014162:Transfection / Q000379:methods*
chemical_list: D002412:Cations; D003470:Culture Media; D008055:Lipids; D018698:Glutamic Acid; D004247:DNA