作者：Xue YN, Liu M, Peng L, Huang SW*, Zhuo RX
關(guān)鍵字：Gene delivery, polycation, bioreducible
論文來(lái)源：期刊
具體來(lái)源：Macromolecular Bioscience, 2010, 10, 404-414.
發(fā)表時(shí)間：2010年
Dendritic poly(amidoamine)s (PAMAM)s were introduced into the side chains of disulfide-containing poly(amidoamine)s via repetitive Michael addition and amidation. The bioreducible poly(amidoamine)s grafted with dendritic polyamidoamines showed high buffer capacity, low cytotoxicity and strong DNA binding ability at low N/P ratio. They were able to condense DNA into small sized polycation/DNA complexes, which degraded and released the incorporated DNA under reductive conditions. In comparison to the original disulfide-containing poly(amidoamine) with aminoethyl side chain, the grafting of the bioreducible poly(amidoamine) with dendrimer greatly improved the transfection efficiencies of 293T and HeLa cells with foreign DNA at various N/P ratios. The structure-gene delivery property relations of dendrimer-grafted polycations will provide valuable insight into the design of highly efficient and less toxic polycationic gene carriers.