Kakimoto S, Moriyama T, Tanabe T, Shinkai S, Nagasaki T. Dual-ligand effect of transferrin and transforming growth factor alpha on polyethyleneimine-mediated gene delivery.
J Control Release 2007;
120:242-9. [PMID:
17574290 DOI:
10.1016/j.jconrel.2007.05.001]
[Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2007] [Revised: 04/21/2007] [Accepted: 05/01/2007] [Indexed: 10/23/2022]
Abstract
In order to enhance the internalization of exogenous gene and add cell specificity to non-viral vectors, receptor-binding elements have been widely utilized to mimic the virus infection. Herein, for the purpose of intensifying the effects of the ligand on gene delivery, dual receptor-binding elements, transferrin (Tf) and transforming growth factor alpha (TGFalpha), were introduced into the polyethyleneimine polyplex. The transfection and internalization efficiency by dual Tf- and TGFalpha-introduced polyplex (Tf&TGFalpha-polyplex) was examined in A549 and CHO-K1 cells, respectively. In A549, Tf&TGFalpha-polyplex had higher transfection efficiency when compared to that by single Tf- or TGFalpha-introduced polyplex (Tf-polyplex and TGFalpha-polyplex), respectively, while no enhancement was observed in CHO-K1. Moreover, in A549, the internalization efficiency of dual Tf&TGFalpha-polyplex was higher than that of single Tf- and TGFalpha-polyplex. In contrast, in CHO-K1, no difference in internalization efficiency was observed. In the presence of excess free transferrin or TGFalpha, the internalization efficiency of Tf&TGFalpha-polyplex was strongly inhibited only in A549, not in CHO-K1. In summary, the enhancement of internalization efficiency by dual ligands is an important factor for improving transfection efficiency. In addition, the effect of dual ligands depends on cell species; receptor-mediated and efficient internalization may be related to this enhanced transfection efficiency.
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