Foekens JA, Henkelman MS, Fukkink JF, Blankenstein MA, Klijn JG. Combined effects of buserelin, estradiol and tamoxifen on the growth of MCF-7 human breast cancer cells in vitro.
Biochem Biophys Res Commun 1986;
140:550-6. [PMID:
3096324 DOI:
10.1016/0006-291x(86)90767-9]
[Citation(s) in RCA: 34] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The growth-stimulation of MCF-7 human breast cancer cells in vitro induced by 30 pM estradiol was inhibited both by the LHRH-agonist Buserelin and the anti-estrogen Tamoxifen used as single agents. Combined administration of both drugs was less effective in this respect. In the presence of estradiol Buserelin had no effect on the pattern of [35S]methionine labelled secretory proteins when examined with one-dimensional gel electrophoresis, whereas the estrogen-induced progesterone receptor synthesis was inhibited. Thus with estradiol concentrations comparable to plasma values in medically castrated patients, the LHRH-agonist Buserelin can directly inhibit breast cancer cell growth in vitro.
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