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FGF Receptor-mediated Gene Delivery using Ligands Coupled to Polyethylenimine

Institute of Immunology, Zhejiang University Hangzhou, 310058, PR China

Hai Yu

Institute of Immunology, Zhejiang University Hangzhou, 310058, PR China

Hongliang Huang

Institute of Immunology, Zhejiang University Hangzhou, 310058, PR China

Fenping Shen

Institute of Immunology, Zhejiang University Hangzhou, 310058, PR China

Xiaoyuan Wu

Institute of Chemical Biology and Pharmaceutical Chemistry Zhejiang University, Hangzhou, 310028, PR China

Jingzhong Li

Institute of Immunology, Zhejiang University Hangzhou, 310058, PR China

Jianli Wang

Institute of Immunology, Zhejiang University Hangzhou, 310058, PR China

Xuetao Cao

Institute of Immunology, Zhejiang University Hangzhou, 310058, PR China, Institute of Immunology, Second Military Medical University Shanghai, 200433, PR China

Qingqing Wang

Institute of Immunology, Zhejiang University Hangzhou, 310058, PR China, tangguping{at}yahoo.com.cn or wqq{at}zju.edu.cn

Guping Tang

Institute of Chemical Biology and Pharmaceutical Chemistry Zhejiang University, Hangzhou, 310028, PR China

To obtain new nonviral vectors with high gene delivery efficiency and special cell targeting ability, an attractive strategy is to link ligands to polyethylenimine (PEI). Fibroblast growth factor receptors (FGFRs) are highly expressed on a variety of human cancer cells and are potential targets for cancer gene therapy. In this study, the peptides NH2-Met-Gln-Leu-Pro-Leu-Ala-ThrGly-Gly-Gly-Cys-COOH (MC11) which have been proved to combine specially with the FGFR on cell membrane are coupled to PEI using N-Succinimidyl-3-(2-pyridyldithio) propionate (SPDP) as a linker with different molar ratios (1 : 0.3, 1 : 0.75, 1 : 1.5, and 1 : 3.0) and the new polymer PEI-MC11 is verified by a series of physicochemical methods including 1H-NMR and FTIR. The agarose gel electrophoresis assay, particle size test, zeta potential test, and electron microscope observation show that PEI-MC11 can efficiently condense plasmid DNA into nanoparticles with about 200 nm in diameter and with positive surface charge at the suitable N/P ratio. The MTT assay suggests the decreased toxicity of the polymers. The results of the gene delivery efficiency in vitro show that PEI-MC11/pDNA polyplexes have significantly greater transgene activity than PEI/pDNA in COS-7 and HepG2 cells which express FGFR positively, while no such effect is observed in PC3 cells which have negative FGFR. The enhanced gene delivery efficiency of PEI-MC11 can be blocked by the co-culture of free peptides MC11 before the gene delivery procedure. The synthesized nonviral vector based on PEI with the targeting peptides MC11 for binding FGFR has improved efficiency of gene delivery and targeting specificity in FGFR positive cells. It may have potential application in cancer gene therapy.

Key Words: FGFR • polyethylenimine • gene delivery • nonviral vector

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This version was published on September 1, 2007

Journal of Biomaterials Applications, Vol. 22, No. 2, 163-180 (2007)
DOI: 10.1177/0885328206074503


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This Article Abstract Free Full Text (Free PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Similar articles in PubMed Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Web of Science (2) Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Li, D. Articles by Tang, G. Search for Related Content PubMed PubMed Citation Articles by Li, D. Articles by Tang, G. Pubmed/NCBI databases Compound via MeSH Substance via MeSH Social Bookmarking                         What's this?