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Gene. 2012 Jan 10;491(2):205-9. doi: 10.1016/j.gene.2011.09.021. Epub 2011 Oct 1.

Self-assemble gene delivery system for molecular targeting using nucleic acid aptamer.

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  • 1Department of Hospital Pharmacy, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan.


We have developed a novel vector constructed with pDNA, polyethylenimine (PEI), and mucin 1 (MUC1) aptamer for tumor-targeted gene delivery. The MUC1 aptamer and non-specific aptamer were employed to coat the pDNA/PEI complexes electrostatically and stable nanoparticles were formed. The addition of a non-specific aptamer to the pDNA/PEI complex decreased gene expression in the human lung cancer cell line, A549 cells expressing MUC1 regularly. At the same time, the pDNA/PEI/MUC1 aptamer complex showed higher gene expression than pDNA/PEI/non-specific aptamer complex. Furthermore, the pDNA/PEI/MUC1 aptamer complex showed markedly high gene expression in tumor-bearing mice; thus, pDNA/PEI/MUC1 aptamer complexes are useful as a tumor-targeted gene delivery system with high transfection efficiency.

Copyright © 2011 Elsevier B.V. All rights reserved.

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