Retinoic Acid and Estrogen Modulation of Insulin-like Growth Factor Binding Protein-4 Gene Expression and the Estrogen Receptor Status of Human Breast Carcinoma Cells

M. S. Sheikh, Z. M. Shao, A. Hussain, J. C. Chen, Charles Roberts, D. Leroith, J. A. Fontana

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Retinoic acid (RA) and estrogen modulation of insulin like-growth factor binding protein-4 (IGFBP-4) gene expression was investigated in a number of human breast carcinoma (HBC) cell lines. Our results indicate that RA and/or estrogen modulation of IGFBP-4 mRNA levels appear to correlate with the ER-status of HBC cell lines. RA and estrogen enhanced IGFBP-4 mRNA levels in ER-positive MCF-7, RRO-I and ZR-75 cell lines and the effect of both of these agents in combination was additive. Although both individually also enhanced IGFBP-4 mRNA levels in ER-positive T47D cells, their effect in combination was antagonistic in this cell line. Transfection of human ER into ER-negative MDA-MB-231 cells conferred RA and estrogen the ability to enhance IGFBP-4 mRNA but both agents failed to concomitantly modulate IGFBP-4 levels in the CM suggesting a dual regulation by these agents at transcription/post-transcription and translation/secretion levels.

Original languageEnglish (US)
Pages (from-to)1232-1238
Number of pages7
JournalBiochemical and Biophysical Research Communications
Volume193
Issue number3
DOIs
StatePublished - Jun 30 1993
Externally publishedYes

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Insulin-Like Growth Factor Binding Protein 4
Tretinoin
Gene expression
Estrogen Receptors
Estrogens
Cells
Modulation
Breast Neoplasms
Gene Expression
Cell Line
Messenger RNA
Transcription
Transfection

ASJC Scopus subject areas

  • Molecular Biology
  • Biophysics
  • Biochemistry

Cite this

Retinoic Acid and Estrogen Modulation of Insulin-like Growth Factor Binding Protein-4 Gene Expression and the Estrogen Receptor Status of Human Breast Carcinoma Cells. / Sheikh, M. S.; Shao, Z. M.; Hussain, A.; Chen, J. C.; Roberts, Charles; Leroith, D.; Fontana, J. A.

In: Biochemical and Biophysical Research Communications, Vol. 193, No. 3, 30.06.1993, p. 1232-1238.

Research output: Contribution to journalArticle

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