Estrogen inhibition of a M(r) 39,000 glycoprotein secreted by human breast cancer cells

D. Bronzert, Marc E Lippman, M. Lippmann

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

We have identified a secreted glycoprotein with an apparent molecular weight of 39,000 that is inhibited by estrogens and stimulated by antiestrogens in the MCF-7 human breast cancer cell line. The protein was detected within 24 h of hormone treatment with inhibition occurring at concentrations as low as 10-11 M estradiol and stimulation occurring with antiestrogens. When phenol red, which has been found to have estrogenic activity, is removed from the tissue culture medium, no inhibition of cell growth or induction of the M(r) 39,000 protein is seen with antiestrogens. A 6-fold decrease in the amount secreted in the presence of estrogens is seen under these conditions. The induction was specific in that growth inhibition by several other means did not induce expression of the M(r) 39,000 protein. The M(r) 39,000 protein has been identified as a glycoprotein complex that can be resolved into four polypeptides with two major components that migrate in the pH range of 5.5 to 6.3 by two-dimensional gel electrophoresis. This protein is the first evidence that estrogens inhibit a specific protein and it may prove useful as a marker of antiestrogen-induced growth arrest in breast cancer.

Original languageEnglish
Pages (from-to)1234-1238
Number of pages5
JournalCancer Research
Volume47
Issue number5
StatePublished - Jan 1 1987
Externally publishedYes

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Glycoproteins
Estrogens
Estrogen Receptor Modulators
Breast Neoplasms
Proteins
Growth
Phenolsulfonphthalein
Electrophoresis, Gel, Two-Dimensional
Culture Media
Estradiol
Molecular Weight
Hormones
Cell Line
Peptides

ASJC Scopus subject areas

  • Cancer Research
  • Oncology

Cite this

Bronzert, D., Lippman, M. E., & Lippmann, M. (1987). Estrogen inhibition of a M(r) 39,000 glycoprotein secreted by human breast cancer cells. Cancer Research, 47(5), 1234-1238.

Estrogen inhibition of a M(r) 39,000 glycoprotein secreted by human breast cancer cells. / Bronzert, D.; Lippman, Marc E; Lippmann, M.

In: Cancer Research, Vol. 47, No. 5, 01.01.1987, p. 1234-1238.

Research output: Contribution to journalArticle

Bronzert, D, Lippman, ME & Lippmann, M 1987, 'Estrogen inhibition of a M(r) 39,000 glycoprotein secreted by human breast cancer cells', Cancer Research, vol. 47, no. 5, pp. 1234-1238.
Bronzert, D. ; Lippman, Marc E ; Lippmann, M. / Estrogen inhibition of a M(r) 39,000 glycoprotein secreted by human breast cancer cells. In: Cancer Research. 1987 ; Vol. 47, No. 5. pp. 1234-1238.
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