“…[14][15][16][17][18][19][20][21][22][23][24] Among the existing nonviral vectors, the cationic liposome, representing an attractive, alternative approach for gene delivery has a broad varity of advantages, such as biodegradability, easy preparation, good repeatability and potential clinical applications. [25][26][27][28][29] Cationic lipids generally consist of polar head group and hydrophobic tails connected through the backbone (Fig. 1), while most of the backbone in earlier cationic lipids was classified into glycerol-type just as N- [2-[(1,5,10,14-tetraazatetradecane-1-yl) carbonylamino] ethyl]-N,Ndimethyl-2,3-bis(oleoyloxy)-1-propanaminium (DOSPA) and N- [2,3-dioleoyloxypropyl]-N,N,N-trimethylammonium chloride (DOTAP) 30,31) and cholesterol-type, such as 3β-[N-(N′,N′-dimethylaminoethyl) carbamoyl] cholesterol (DC-Chol).…”