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Título

Influence of prolactin on the differentiation of mouse B-Lymphoid precursors

AutorMorales, Patricia ; Carretero, María Victoria; Gerónimo, Haydée; Copín, Sergio G.; Gaspar, María Luisa; Marcos, Miguel A. R.; Martín-Pérez, Jorge
Fecha de publicaciónago-1999
EditorAmerican Association for Cancer Research
CitaciónCell Growth and Differentiation 10(8): 583-590 (1999)
ResumenDevelopment and activation of immune cells are submitted to hormonal influences, as illustrated by the roles of corticosteroids in thymus, pregnancy-related estrogens in B-cell development, or prolactin (PRL) on T-cell generation and function. We have analyzed the putative role of PRL in B lymphopoiesis and differentiation. We chose as an experimental model the interleukin (IL)-3 dependent BaF-3 pro-B cell line, which was transfected with the rat long form of the PRL receptor (PRL-R) and transferred from IL-3- to PRL-enriched media. When stimulated with PRL, the PRL-R transfectants underwent some changes characteristic of B-cell differentiation: (a) IL-2R {alpha} chain became positively controlled by PRL; (b) antiapoptotic Bcl-2 protein was induced by PRL in a dose-dependent manner; and (c) transcription of the pre-B cell receptor encoding the {lambda}5 gene was strongly up-regulated. We attempted to evaluate the differentiation-promoting activity of PRL in more physiological conditions, and the presence of PRL-R in bone marrow B-cell precursors was revealed. Furthermore, PRL promoted significant expansions of defined B-lineage cell populations in short-term bone marrow cell cultures. These findings suggest that PRL, in collaboration with other cytokines and hormonal influences, modulates B-cell development.
Descripción8 pages, 6 figures.
Versión del editorhttp://cgd.aacrjournals.org/cgi/content/full/10/8/583
URIhttp://hdl.handle.net/10261/24466
ISSN1044-9523
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