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Morisaki, N. et al.

Effects of transforming growth factor-beta 1 on growth of aortic smooth muscle cells. Influences of interaction with growth factors, cell state, cell phenotype, and cell cycle.

Transforming growth factor (TGF)-beta 1 may have different effects on cell proliferation depending on many conditions. This paper clarifies the effects of various conditions on the effect of TGF-beta 1 on proliferation of cultured rabbit aortic smooth muscle cells (SMC) and also the time of its action during the cell cycle. TGF-beta 1 at 10-10,000 pg/ml inhibited DNA synthesis of SMC in the G0 stage derived from normal media or atheromatous intima stimulated by either platelet-derived growth factor (PDGF), fibroblast growth factor, SMC-derived growth factor, or fetal bovine serum (FBS). TGF-beta 1 also inhibited the growth of SMC in the growing state stimulated by either PDGF or FBS. TGF-beta 1 was effective only when added to the culture within 2 h after stimulation of the G0 state SMC with PDGF. It also inhibited increase in transcription of the c-myc protooncogene on stimulation of SMC with PDGF. These data suggest that TGF-beta 1 inhibited proliferation of SMC irrespective of the cell phenotype, growth conditions, and growth factors present and that it exerted this inhibitory effect during the time of the G0/G1 transition.[1]

References

Effects of transforming growth factor-beta 1 on growth of aortic smooth muscle cells. Influences of interaction with growth factors, cell state, cell phenotype, and cell cycle. Morisaki, N., Kawano, M., Koyama, N., Koshikawa, T., Umemiya, K., Saito, Y., Yoshida, S. Atherosclerosis (1991) [Pubmed]

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