title: Lipoplex morphologies and their influences on transfection efficiency in gene delivery.
abstract: Cationic lipid-mediated gene transfer is widely used for their advantages over viral gene transfer because it is non-immunogenic, easy to produce and not oncogenic. The main drawback of the application of cationic lipids is their low transfection efficiency. Many reports about transfection efficiency of cationic lipids have been published in recent years. In this review, the current status and prospects for transfection efficiency of different morphologies of lipoplexes are discussed. High transfection activity will be acquired for H(C)(II) structure when membrane fusion is dominant, but when serum is present L(C)(alpha) lipoplexes show great superiority for their inhibition dissociation by serum during lipoplexes transporting. Increasing DOPE often gains high activity for the H(C)(II) structure promoted by DOPE. High lipofection will be gained from large lipoplexes when endocytosis is dominant, because large particles facilitate membrane contact and fusion. We suggest morphologies of lipoplex should be characterized at two levels, lipoplex size and self-assemble structures of lipoplexes, and understanding these would be very important for scientists to prepare novel cationic lipids and design novel formulations with high transfection efficiency.
authors.affiliation: Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China.
authors.forename: Baichao
authors.initials: B
authors.lastname: Ma
authors.forename: Shubiao
authors.initials: S
authors.lastname: Zhang
authors.forename: Huiming
authors.initials: H
authors.lastname: Jiang
authors.forename: Budiao
authors.initials: B
authors.lastname: Zhao
authors.forename: Hongtao
authors.initials: H
authors.lastname: Lv
mesh_terms: D000818:Animals; D002412:Cations; D002462:Cell Membrane / Q000378:metabolism*; D004247:DNA / Q000737:chemistry / Q000378:metabolism*; D004705:Endocytosis; D015316:Genetic Therapy / Q000379:methods*; D006801:Humans; D050356:Lipid Metabolism; D008055:Lipids / Q000737:chemistry* / Q000633:toxicity; D008081:Liposomes; D008561:Membrane Fusion; D008968:Molecular Conformation; D009690:Nucleic Acid Conformation; D009994:Osmolar Concentration; D010316:Particle Size; D044967:Serum / Q000378:metabolism; D013696:Temperature; D014162:Transfection
chemical_list: D002412:Cations; D008055:Lipids; D008081:Liposomes; D004247:DNA