Aerosol delivery of spermine-based poly(amino ester)/Akt1 shRNA complexes for lung cancer gene therapy

作者：Jiang Hu Lin; Hong Seong Ho; Kim You Kyoung; Islam Mohammad Ariful; Kim Hye Joon; Choi Yun Jaie; Nah Jae Woon; Lee Kee Ho; Han Ki Won; Chae Chanhee; Cho Chong Su^*; Cho Myung Haing

来源：International Journal of Pharmaceutics, 2011, 420(2): 256-265.

DOI：10.1016/j.ijpharm.2011.08.045

• Lung cancer
• Gene therapy
• Poly(amino ester)
• Spermine
• Aerosol delivery

Polyethylenimine (PEI) has been commonly used as a cationic polymeric gene carrier due to high transfection efficiency, however, its cytotoxicity has hindered the practical application. In this study, we report the development of poly(amino ester) (PAE) based on glycerol propoxylate triacrylate (GPT) and spermine (SPE) as an alternative gene carrier for lung cancer therapy. GPT-SPE copolymer was prepared by Michael addition reaction between GPT and SPE, and the efficacy was evaluated using shAkt1 as a model therapeutic gene. The molecular weight and composition were characterized using gel permeability chromatography (GPC) and H-1-nuclear magnetic resonance (H-1-NMR), respectively. The GPT-SPE could effectively condense DNA with about 163 nm size and protect the DNA from nucleases. GPT-SPE/DNA complexes showed excellent transfection with low toxicity both in vitro and in vivo. Furthermore, aerosol delivery of GPT-SPE/Akt1 shRNA complexes significantly suppressed lung tumorigenesis in K-ras(LA1) lung cancer model mice. These results suggest that GPT-SPE can be used in shRNA-based lung cancer gene therapy.

• 出版日期2011-11-28