Abstract
Since the discovery of physiologically-regulated prolactin (PRL) phosphorylation, one focus of the laboratory has been an examination of the different functions of the unmodified and phosphorylated hormone. In the mammary gland, unmodified PRL promotes growth activities, whereas phosphorylated or pseudophosphorylated PRL antagonizes this while also being a superior agonist for changes that favor differentiation. Phosphorylated PRL also increases expression of the short forms of the PRL receptor. These short forms of the receptor have functions beyond the accepted dominant negative and in mammary epithelial cells are capable of generating an intracellular signal leading to increased tight junction formation and β-casein expression.
Original language | English (US) |
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Pages (from-to) | 69-79 |
Number of pages | 11 |
Journal | Journal of Mammary Gland Biology and Neoplasia |
Volume | 13 |
Issue number | 1 |
DOIs | |
State | Published - Mar 2008 |
Externally published | Yes |
Keywords
- Cell junction
- Differentiation
- Extracellular matrix
- Phosphorylated prolactin
- S179D prolactin
- Short prolactin receptors
ASJC Scopus subject areas
- Oncology
- Cancer Research