Fig. 3 Ectopic Activation of Shh and Shh Targets Results from an Inhibition of Etv-Dependent Regulation
(A) Shh expression at different stages of limb development in R26-EtvEnR and Prx1-Cre;R26-EtvEnR embryos.
(B) Expression of Gli1, Hand2, Alx4, and Gremlin transcripts in the limb buds of R26-EtvEnR and Prx1-Cre;R26-EtvEnR embryos at E10.5.
(C) Dorsal view of Shh expression in the zebrafish pectoral fin bud 48 hr postfertilization (upper); a higher-magnification view (lower). The scale bars represent 0.02 mm.
(D) Quantitative real-time PCR analysis of Gli1 mRNA levels after culturing of anterior limb bud cells for 24 hr in the presence or absence of Fgf8.
Reprinted from Developmental Cell, 16(4), Mao, J., McGlinn, E., Huang, P., Tabin, C.J., and McMahon, A.P., Fgf-dependent Etv4/5 activity is required for posterior restriction of Sonic Hedgehog and promoting outgrowth of the vertebrate limb, 600-606, Copyright (2009) with permission from Elsevier. Full text @ Dev. Cell