Table 1.

Primers for quantitative RT-PCR.

Gene	Primer	Sequence (5′->3′)	Size (bp)
GAPDH	Forward	CATGAGAAGTATGACAACAGCCT	113
	Reverse	AGTCCTTCCACGATACCAAAGT
SMAD2	Forward	GCCGCCCGAAGGGTAGAT	164
	Reverse	TTCTGTTCTCCACCACCTGC
SMAD7	Forward	GGTGCGTGGTGGCATACT	144
	Reverse	GCTGACTCTTGTTGTCCGAAT
TGFBR1	Forward	GCAATGGGCTTAGTATTCTGG	76
	Reverse	AAGGCAACTGGTAGTCTTCGTG
TGFBR2	Forward	TGTGGAGGAAGAACGACAAGA	78
	Reverse	GAGTGAAGCCGTGGTAGGTG
TGFB1	Forward	CATGGAGCTGGTGAAACGGAAG	74
	Reverse	GACTGGCGAGCCTTAGTTTGGAC
SMAD3	Forward	CGATGTCCCCAGCACACAATAAC	82
	Reverse	TAGTAGGAGATGGAGCACCAAAAGG