Mia1 expression is directly regulated by FGFs. (A) Day E12.5 lungs were grown for 1 day in BGJb medium containing DMSO, SU5402, LY294002, or UO126. qRT-PCR shows that Mia1 expression is significantly (*, p < 0.001 vs DMSO) reduced by SU5402, LY294002 and UO126. (B) Purified day E12.5 lung epithelial rudiments were grown for 7 days then treated with SU5402 for 1 day. qRT-PCR demonstrates that SU5402 significantly (*, p = 0.004) reduced Mia1 expression. Data are plotted as means ± SE (n = 4 for both A and B).