Linked Life Data

20605949

Source:http://linkedlifedata.com/resource/pubmed/id/20605949

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
11
pubmed:dateCreated
2010-11-2
pubmed:abstractText
Despite support for receptor of activated NF-?B ligand (RANKL) as a mediator of mammary progesterone action, the extent to which this cytokine can functionally contribute to established progesterone-induced mammary morphogenetic responses in the absence of other presumptive effectors is still unclear. To address this uncertainty, we developed an innovative bigenic system for the doxycycline-inducible expression of RANKL in the mammary epithelium of the progesterone receptor knockout (PRKO) mouse. In response to acute doxycycline exposure, RANKL is specifically expressed in the estrogen receptor ? (ER) positive/progesterone receptor negative (ER(+)/PR(-)) cell type in the PRKO mammary epithelium, a cell type that is equivalent to the ER(+)/PR(+) cell type in the wild-type (WT) mammary epithelium. Notably, the ER(+)/PR(+) mammary cell normally expresses RANKL in the WT mammary epithelium during pregnancy. In this PRKO bigenic system, acute doxycycline-induced expression of RANKL results in ordered mammary ductal side branching and alveologenesis, morphological changes that normally occur in the parous WT mouse. This mammary epithelial expansion is accompanied by significant RANKL-induced luminal epithelial proliferation, which is driven, in part, by indirect induction of cyclin D1. Collectively, our findings support the conclusion that RANKL represents a critical mediator of mammary PR action and that restricted expression of this effector to the ER(+)/PR(+) mammary cell-type is necessary for a spatially ordered morphogenetic response to progesterone.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
1530-6860
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
24
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
4408-19
pubmed:dateRevised
2011-11-1
pubmed:meshHeading
pubmed:year
2010
pubmed:articleTitle
Targeting RANKL to a specific subset of murine mammary epithelial cells induces ordered branching morphogenesis and alveologenesis in the absence of progesterone receptor expression.
pubmed:affiliation
Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA.
pubmed:publicationType
Journal Article, Research Support, N.I.H., Extramural