Response of 7,12-Dimethylbenz(a)anthracene-Induced Rat Mammary Tumor Cells to Tamoxifen, in Vitro

Ricky J. Ballou, Ahmad R. Safa, Michael T. Tseng

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Primary cell cultures from a density-defined cell subpopulation of the DMBA-induced rat mammary tumors were exposed to tamoxifen during their log phase of growth. Growth inhibition and the ultrastructure of surviving cells were examined along with the influence of this antiestrogen on the secreted proteins as determined by pulse labeling with [35S]methionine and fluorography. Cell growth was remarkably inhibited at clinically achievable concentrations. However, ultrastructural changes in the surviving cells were minimal, the most noteworthy being the accumulation of myelin bodies. Protein secretion was affected in the defined subpopulation of several tumors by the reduced production of a high-molecular-weight protein. These tumors may represent a population of estrogen-sensitive tumors within the DMBA-induced mammary tumor model.

Original languageEnglish (US)
Pages (from-to)256-263
Number of pages8
JournalProceedings of the Society for Experimental Biology and Medicine
Volume173
Issue number2
DOIs
StatePublished - Jun 1983
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

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