Figure 2From: EpCAM aptamer mediated cancer cell specific delivery of EpCAM siRNA using polymeric nanocomplexEffect of citrate on the nanocomplex size, charge and characterization of the nanocomplex. Graph showing the hydrodynamic sizes (A) and surface charge (B) of PEI: citrate nanocomplexes formed using different ratio of PEI to citrate measured using zetasizer. C. Titration of different concentration of aptamer and siRNA was carried out and loaded onto 2% agarose gel with ethidium bromide and checked for the retention of the PEI complex on the wells. Lane 3 shows 200nM of aptamer and 200nM of siRNA is required to saturate 0.3μgs of PEI and the next highest concentration of 300nM of aptamer & siRNA respectively had some amount of free siRNA and aptamer (lane 4). Lane 5 & 6 indicates free aptamer and siRNA indicated with red and black arrow respectively. On the right, histogram plot showing Particle size distribution of the PEI-Apt-siRNA nanocomplex. D. Histogram overlay plot showing the percent number distribution of the PEI nanocore alone and PEI-nanocomplex with aptamer and siRNA (hydrodynamic diameter in nm) measured using zetasizer. E. Graph showing the total counts of representative zeta-potential (mV) of the PEI nanocore and the PEI-Apt-siEp nanocomplex. F. TEM images of the PEI nanocomplex left panel showing the uniformity of particle distribution and histogram showing distinct particles with a spherical shape (G). H. Graph showing the percentage cell proliferation upon treating with different concentration from 0.1 to 3 μg/mL of PEI on MCF-7 and WERI-Rb1 cell line till 48 h. Inhibitory effect of PEI on the cell proliferation and mitrochondrial activity was assessed by MTT assay.Back to article page