-
- M C Leite-de-Moraes, P Touraine, P A Kelly, F Kuttenn, and M Dardenne.
- Université René Descartes, Paris V, CNRS URA 1461, Hôpital Necker, Paris, France.
- J. Endocrinol. 1995 Nov 1; 147 (2): 353-9.
AbstractPrevious reports demonstrated that prolactin receptors (PRL-R) are widely expressed on cells of the immune system. We analyzed a possible regulation of PRL-R expression on human mononucleated blood cells by prolactin (PRL) itself. PRL-R expression was analyzed by immunofluorescence on T and B lymphocytes and monocytes from peripheral blood mononucleated cells (PBMC) of patients with hyperprolactinemia or acromegaly compared with sex- and age-matched control subjects. The frequency of PRL-R positive cells and the intensity of PRL-R expression was only modified among the CD8+ T cell population of hyperprolactinemic patients with macroadenoma. No correlation was reported between PRL-R expression and circulating PRL levels. The percentage of PRL-R+ cells on B or T lymphocytes and monocytes as well as the capacity of PBMC to proliferate in response to T cell mitogens were not significantly different in bromocriptine-treated compared with untreated patients. These findings suggest that factors other than pituitary PRL play the major role in regulating PRL-R expression on cells of the immune system.
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