期刊
JOURNAL OF GENE MEDICINE
卷 13, 期 5, 页码 290-301出版社
WILEY-BLACKWELL
DOI: 10.1002/jgm.1569
关键词
gene delivery; liposome; nonviral vector; polyethylenimine; target delivery
资金
- National Natural Science Foundation of China (NSFC) [30873175, 30973647]
- Zhejiang Provincial Natural Science Foundation of China (ZJNSF) [Y2090229]
- National Basic Research Program of China (973 Program) [2009CB930300]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [847758] Funding Source: National Science Foundation
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [0854465] Funding Source: National Science Foundation
Background A successful gene delivery system needs to breakthrough several barriers to allow efficient transgenic expression. In the present study, successive targeting liposomes (STL) were constructed by integrating various targeting groups into a nanoparticle to address this issue. Methods Polyethylenimine (PEI) 1800-triamcinolone acetonide (TA) with nuclear targeting capability was synthesized by a two-step reaction. Lactobionic acid was connected with cholesterol to obtain a compound of [(2-lactoylamido) ethylamino] formic acid cholesterol ester (CHEDLA) with hepatocyte-targeting capability. The liposome was modified with PEI 1800-TA and CHEDLA to prepare successive targeting liposome (STL). Its physicochemical properties and transfection efficiency were investigated both in vitro and in vivo. Results The diameter of STL was approximately 100 nm with 20 mV of potential. The confocal microscopy observation and potential assay verified that lipid bilayer of STL was decorated with PEI 1800-TA. Cytotoxicity of STL was significantly lower than that of PEI 1800-TA and PEI 25K. The transfection efficiency of 10% CHEDLA STL in HepG2 cells was the higher than of the latter two with serum. Its transfection efficiency was greatly reduced with excessive free galactose, indicating that STL was absorbed via galactose receptor-mediated endocytosis. The in vivo study in mice showed that 10% CHEDLA STL had better transgenic expression in liver than the other carriers. Conclusions STL with multi-ligand was able to overcome the various barriers to target nucleus and special cells and present distinctive transgenic expression. Therefore, it has a great potential for gene therapy as a nonviral carrier. Copyright (C) 2011 John Wiley & Sons, Ltd.
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