we demonstrated that 24 hours of incubation of human dermal fibroblasts with tgf-beta 1 ( 1 ng/ml ) under serum free conditions resulted in an elevated expression of tgf-beta 1 , collagen alpha 2 ( i ) and fibronectin mrnas that persisted at least 96 hours after removal of tgf-beta 1 .
C0086418
human
C0080222
tgf-beta 1