In situ hybridization analysis of Fgf10 and its upstream
transcriptional regulators in
TβRIIΔ/Δ and control lungs.
A, whole mount (panels a, b, e, and
f) and section (panels c, d, g, and
h) in situ hybridization. Note expansion and increased
Fgf10 expression in
TβRIIΔ/Δ (panels
e–h) compared with TβRIIfl/fl
(panels a–d) lungs. Scale bar, 2.2 mm (panels
a and c); 1 mm (panels b and d); 100 μm
(panels e–h). B, section in situ
hybridization for Foxf1 (panels a and d),
Tbx5 (panels b and e), and Tbx4 (panels
c and f) in
TβRIIΔ/Δ and
TβRIIfl/fl (control) E15.5 lungs. Scale
bar, 100 μm. C, quantification of Foxf1 and
Tbx4 mRNA by real-time PCR. Values are fold induction or repression,
compared with TβRIIfl/fl controls
(arbitrarily adjusted to 1). p value, 0.004.