Figure 4. Nuclear import of the SP-C plasmid in MLE-12 cells is abrogated following siRNA knockdown of TTF-1, NFIA, or GATA-6.
MLE-12 cells were treated with siRNAs against the transcription factors TTF-1, NFIA, and GATA-6, or a non-targeted siRNA as a negative control. A. Western blots were performed on cell extracts at the indicated times following siRNA transfection. B. Forty-eight (TTF-1) or 72 (NF1 and GATA-6) hours post-transfection, pCR-SPC was microinjected into the cytoplasm of the cells and its cellular localization was determined 8 hours later by situ hybridization. The pCRII-ΔDTS plasmid is included as a negative control for background nuclear import. Data are plotted as mean ± st. dev. from three or more independent experiments. (*) indicates p<0.05 when compared to the non-targeting control.