in comparison to the parental or n-methyl-n'-nitro-n-nitrosoguanidine-exposed rat liver epithelial cells ( concentration causing 50 % inhibition of the rate of dna synthesis , 0.25 ng/ml ) , these cells were 10-fold more resistant to the antiproliferative effects of tgf-beta 1 and exhibited resistance to growth inhibition by a highly purified liver-derived growth inhibitor , recombinant human tumor necrosis factor , and transforming growth factor beta 2 .
C1366557
tgf-beta 1
C0086418
human