Table 1.

Entrapment efficiency and siRNA loading of the various liposomal formulations

Group	NPL	1% PL	3% PL	5% PL	1% RPL	3% RPL	5% RPL
Entrapment efficiency (%)	97.2 ± 0.14	97.2 ± 0.04	97.8 ± 0.13	97.8 ± 0.03	98.9 ± 0.04	99.9 ± 0.01	99.9 ± 0.01
siRNA loading (%)	6.33 ± 0.009	6.13 ± 0.002	5.80 ± 0.008	5.47 ± 0.002	6.15 ± 0.003	5.70 ± 0.001	5.27 ± 0.001

Note: Data are shown as the mean ± standard deviation for triplicate measurements.

Abbreviations: NPL, non-PEGylated liposomes; PL, PEGylated liposomes; RPL, RGD-PEGylated liposomes; siRNA, small interfering RNA.