Vitamin B6-coupled poly(ester amine) as gene carrier and application in cancer gene therapy

摘要

The present invention relates to a vitamin B6-coupled poly(ester amine) (VBPEA) as a gene carrier and a method for preparing the gene carrier. Moreover, the present invention relates to a gene delivery complex comprising a therapeutic gene coupled to the gene carrier and a pharmaceutical formulation for gene therapy, which comprises the gene delivery complex as an active ingredient. In addition, the present invention relates to gene therapy utilizing the gene carrier, the gene delivery complex or the pharmaceutical formulation. The VBPEA of the invention has a significantly high gene delivery rate compared to existing gene carriers and a complex of the VBPEA with DNA has little or no cytotoxicity and shows a very high in vivo transfection efficiency. In addition, a complex of the VBPEA with siRNA shows high gene silencing efficiency and can induce a high rate of cell death and the inhibition of cell proliferation in cancer cells, suggesting that it can be used for anticancer gene therapy. Thus, the gene carrier VBPEA of the invention can be used as an experimental gene carrier and can also be widely used in gene therapy against various diseases depending on the kind of therapeutic gene.