The expression of TGF β correlated with pulmonary metastasis. A) MHCC97-L model had a high expression levels than MHCC97-H model by ELASA. * denoted P<0.05. B) TGF β1 in metastasis group have higher levels than in non- metastasis group. C-D) The correlations between TGF β1 mRNA and Smad2, as well as Smad7. Dot denoted the each samples; Lines represent regression line, R: correlation coefficient.