Photo-induced release of active plasmid from crosslinked nanoparticles: o-nitrobenzyl/methacrylate functionalized polyethyleneimine
作者:Moon Suk Kim、Jeffrey Gruneich、Huiyan Jing、Scott L. Diamond
DOI:10.1039/b922613c
日期:——
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。