Figure 1.
GATA-6 negatively regulates TN-C gene expression. (a) Cell lysates from fibroblasts transduced with 5, 10, and 20 MOI of Ad-GATA-6 or 20 MOI of Ad-LacZ (control) for 48 hours were subjected to immunoblot analysis with antibodies against TN-C and GATA-6. (b) Fibroblasts were transduced with 10 MOI of Ad-GATA-6 or control virus for 24 hours, then treated with IL-4 (10 ng/ml) or TGF-β (2.5 ng/ml) for 24 hours. Samples were assayed by immunoblot analysis with antibodies against TN-C and GATA-6 or (c) quantitative RT-PCR to determine TN-C mRNA levels. One representative Western blot of four independent experiments is shown. Band intensities were quantitated by densitometric analysis and are shown relative to the level of untreated fibroblasts transduced with control virus. * P < 0.01.