Lack of relationship between the levels of prolactin receptors and steroid receptors in women with breast cancer

M. Ben-David, J. L. Wittliff, M. Fekete, T. Kadar, S. Biran, A. V. Schally

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

The levels of prolactin receptors (PRL-R), based on a new micro-method, estrogen receptors (ER) and progesterone receptors (PG-R), were determined in 159 breast cancer specimens. Sixty-seven of 159 tumors (42%) had PRL-R levels of 20 fmol/mg protein or higher, and were regarded as PRL-R positive. In 60 of the 159 samples (38%), no PRL-R could be detected, and the remaining 32 samples (20%) were considered borderline. While a positive correlation was found between the presence of ER and PGR, no correlation was detected between PRL-R and any steroid receptors (r=-0.024 for ER vs PRL-R, 0.052 for PGR vs PRL-R and 0.002 for ER + PGR vs PRL-R). Furthermore, PRL-R in levels of 20 fmol/mg protein or higher were found in 35% of samples in which no steroid receptors were detected as well as in 38% and in 27% of samples which exhibited positive ER or PGR respectively (≥ 20 fmol/mg protein). On the other hand, in 47% of the samples possessing both ER and PGR, the PRL receptors could not be found. These results clearly demonstrate that in the human breast cancer, the presence of PRL-R is independent of the status of either ER or PGR. It is suggest that the measurement of PRL-R could serve as a chemical marker to guide a possible therapeutic use of PRL-suppressing drugs in women with breast cancer.

Original languageEnglish (US)
Pages (from-to)327-334
Number of pages8
JournalBiomedicine and Pharmacotherapy
Volume42
Issue number5
StatePublished - Jan 1 1988
Externally publishedYes

ASJC Scopus subject areas

  • Pharmacology

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