To facilitate DNA packaging and photolytic release, o-nitrobenzyl and methacrylate functionalized PEI (P10A) was synthesized for condensing DNA into nanoparticles as small as 160 nm after radical polymerization with initiator. The gene expression following delivery of uncross-linked P10A/DNA was unchanged by photoirradiation of cells. However, exposure to photo-irradiation caused a 3-fold increase in gene expression in cells transfected with cross-linked P10A/DNA. These polyplexes were designed to mimic viral particles that condense and protect DNA while allowing subsequent triggered release of DNA.
为了促进 DNA 的包装和光解释放,合成了邻硝基苄基和
甲基丙烯酸酯官能化的 PEI(P10A),在与
引发剂进行自由基聚合后,可将 DNA 凝聚成小至 160 纳米的纳米颗粒。将未交联的 P10A/DNA 运送到细胞后,其
基因表达在光照射下不会发生变化。然而,光照射会使转染了交联 P10A/DNA 的细胞的
基因表达量增加 3 倍。这些多聚物是模仿病毒颗粒设计的,它们能凝结和保护 DNA,同时允许随后触发释放 DNA。