384717.fig.004a
(a)
384717.fig.004b
(b)
384717.fig.004c
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384717.fig.004d
(d)
Figure 4: (a) In vivo imaging of Cy5.5-labeled SS-PEI in HepG2 tumor bearing in nude mice at different time intervals; (b) tumor accumulation rate of Cy5.5-labeled SS-PEI after postinjection of its complexes at different time intervals; (c) organ distribution of Cy5.5-labeled SS-PEI after postinjection of its complexes at 24 h; (d) Ex vivo imaging of Cy5.5-labeled SS-PEI in organs after postinjection of its complexes at 24 h.