“…By the fusion of liposomes with the cell wall of the target cells, the introduced substance in the liposome may be released into the cytosol and act there either directly or, in the case of DNA, initiate the production of corresponding proteins. As a vehicle for the therapeutic genes, plasmids are often used [ 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 , 77 ]. Plasmids are circular DNA, existing as extrachromosomal DNA in the cytosol and having a cell-independent replication cycle.…”