Nano-Sized Sunflower Polycations As Effective Gene Transfer Vehicles

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• 作者：Yilong Cheng ; Hua Wei ; James-Kevin Y. Tan ; David J. Peeler ; Don O. Maris ; Drew L. Sellers ; Philip J. Horner and Suzie H. Pun
• 刊名：Small
• 出版年：2016
• 出版时间：May 25, 2016
• 年：2016
• 卷：12
• 期：20
• 页码：2750-2758
• 全文大小：584K
• ISSN：1613-6829

文摘

The architecture of polycations plays an important role in both gene transfection efficiency and cytotoxicity. In this work, a new polymer, sunflower poly(2-dimethyl amino)ethyl methacrylate) (pDMAEMA), is prepared by atom transfer radical polymerization and employed as nucleic acid carriers compared to linear pDMAEMA homopolymer and comb pDMAEMA. The sunflower pDMAEMAs show higher IC₅₀, greater buffering capacity, and stronger binding capacity toward plasmid DNA than their linear and comb counterparts. In vitro transfection studies demonstrate that sunflower pDMAEMAs exhibit high transfection efficiency as well as relatively low cytotoxicity in complete growth medium. In vivo gene delivery by intraventricular injection to the brain shows that sunflower polymer delivers plasmid DNA more effectively than comb polymer. This study provides a new insight into the relationship between polymeric architecture and gene delivery capability, and as well as a useful means to design potent vectors for successful gene delivery.