| Literature DB >> 1537876 |
M Hashimoto1, A Shoda, S Inoue, R Yamada, T Kondo, T Sakurai, N Ueno, M Muramatsu.
Abstract
A high number of 125I-activin-A binding sites (an apparent Kd of 260 pM and 5,600 sites/cell) were observed on MC3T3-E1 cells, a well characterized osteoblastic cell line. Activin-A has a mitogenic effect on these cells, with the greatest influence being observed on cells in an undifferentiated state, as well as a suppressive effect on the alkaline phosphatase activity. Northern and ligand blotting analyses revealed that these osteoblastic cells produce follistatin, which was down-regulated by retinoic acid treatment. Because follistatin is an activin-A-binding protein, we suggest that activin-A modulates the function of osteoblastic cells by being regulated by follistatin during differentiation.Entities:
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Year: 1992 PMID: 1537876
Source DB: PubMed Journal: J Biol Chem ISSN: 0021-9258 Impact factor: 5.157