Figure 4From: The expression of TGF-β1, Smad3, phospho-Smad3 and Smad7 is correlated with the development and invasion of nonfunctioning pituitary adenomas qRT-PCR analysis of TGF-β1, Smad7, Smad4 and PCNA. (A) The mRNA expression of TGF-β1. (B) The mRNA expression of Smad7. (C) The mRNA expression of Smad4. (D) The mRNA expression of PCNA. *, P < 0.05; **, P < 0.01.Back to article page