Change in S100A4 expression at the protein and mRNA levels after Ad-S100A4-RNAi transfer into the mouse retina. (a, b) Western blotting confirmed that protein levels of S100A4 were significantly lower in the OIR-S100A4-RNAi group mouse retinas compared with the OIR, OIR-GFP, and control group mouse retinas. The bands were quantified by densitometry and normalised to β-actin. Data were analysed as the mean±SD. OIR-S100A4-RNAi group vs control group, *P<0.05; OIR-S100A4-RNAi group vs OIR group, ***P<0.05; OIR-S100A4-RNAi group vs OIR-GFP group, ***P<0.05. (c) Real-time PCR analysis further confirmed that mRNA levels of S100A4 in the S100A4 group were significantly lower than those in the control group, OIR group and GFP group mouse retinas. The relative amount of mRNA was normalised to β-actin. Data are shown as the mean±SD. OIR-S100A4-RNAi group vs control group, ***P<0.05; OIR-S100A4-RNAi group vs OIR group, ***P<0.05; OIR-S100A4-RNAi group vs OIR-GFP group, ***P<0.05.