| Literature DB >> 2879636 |
C Knabbe, M E Lippman, L M Wakefield, K C Flanders, A Kasid, R Derynck, R B Dickson.
Abstract
The hormone-dependent human breast cancer cell line MCF-7 secretes transforming growth factor-beta (TGF-beta), which can be detected in the culture medium in a biologically active form. These polypeptides compete with human platelet-derived TGF-beta for binding to its receptor, are biologically active in TGF-beta-specific growth assays, and are recognized and inactivated by TGF-beta-specific antibodies. Secretion of active TGF-beta is induced 8 to 27-fold under treatment of MCF-7 cells with growth inhibitory concentrations of antiestrogens. Antiestrogen-induced TGF-beta from MCF-7 cells inhibits the growth of an estrogen receptor-negative human breast cancer cell line in coculture experiments; growth inhibition is reversed with anti-TGF-beta antibodies. We conclude that in MCF-7 cells, TGF-beta is a hormonally regulated growth inhibitor with possible autocrine and paracrine functions in breast cancer cells.Entities:
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Year: 1987 PMID： 2879636 DOI： 10.1016/0092-8674(87)90193-0
Source DB: PubMed Journal: Cell ISSN： 0092-8674 Impact factor: 41.582