Fig. 1.

Protein levels of transforming growth factor (TGF)-β1 and -β2 in the fetal lung. A: protein levels of free TGF-β1 in the fetal lung tissue did not change by exposure to intra-amniotic lipopolysaccharide (LPS) and/or maternal betamethasone (BTM). B: total TGF-β1 was unchanged by LPS and/or BTM exposure. C: LPS and/or BTM exposure did not change the protein expression of free TGF-β2. D: total TGF-β2 levels increased in the animals that were exposed to BTM 7 days (d) before exposure to LPS. BW, body weight. *P < 0.05 vs. controls using a one-way ANOVA with Tukey's post hoc test.