Fig. 5From: Recent progress in microRNA-based delivery systems for the treatment of human diseaseChemical structures of different polymers used for miRNA delivery. (a) Structure diagram of different charged lipids (DSDAP, DOTAP, DSPC and DSPE). (b) Structure diagram of polymeric vectors (PLL, PEI, PLGA, chitosan, β-cyclodextrin and PAMAM)Back to article page