Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10768626 | Biochemical and Biophysical Research Communications | 2005 | 6 Pages |
Abstract
Growth and function of the mammary gland is regulated by cytokines and modulated by suppressor of cytokine signalling (SOCS) proteins. In vitro experiments demonstrated that SOCS3 can inhibit PRL induction of milk protein gene expression and STAT5 activation. We explored the SOCS3 expression pattern during mouse mammary development and its regulation by PRL and GH in wild-type and STAT5a-null mammary tissue. Our results suggest that, in vivo, PRL stimulates SOCS3 expression in stromal adipocytes, independently of STAT5a stimulation. In mammary epithelial cells, SOCS3 expression appears to be related to STAT3 activation. Together, our results are consistent with a role of SOCS3 in the mammary gland by promoting apoptosis of differentiated cells (adipocytes during gestation and epithelial cells during involution).
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Authors
Fabienne Le Provost, Keiko Miyoshi, Jean-Luc Vilotte, Brian Bierie, Gertraud W. Robinson, Lothar Hennighausen,