Reduced prostate branching morphogenesis in stromal fibroblast, but not in epithelial, estrogen receptor α knockout mice.

Published

Journal Article

Early studies suggested that estrogen receptor alpha (ERα) is involved in estrogen-mediated imprinting effects in prostate development. We recently reported a more complete ERα knockout (KO) mouse model via mating β-actin Cre transgenic mice with floxed ERα mice. These ACTB-ERαKO male mice showed defects in prostatic branching morphogenesis, which demonstrates that ERα is necessary to maintain proliferative events in the prostate. However, within which prostate cell type ERα exerts those important functions remains to be elucidated. To address this, we have bred floxed ERα mice with either fibroblast-specific protein (FSP)-Cre or probasin-Cre transgenic mice to generate a mouse model that has deleted ERα gene in either stromal fibroblast (FSP-ERαKO) or epithelial (pes-ERαKO) prostate cells. We found that circulating testosterone and fertility were not altered in FSP-ERαKO and pes-ERαKO male mice. Prostates of FSP-ERαKO mice have less branching morphogenesis compared to that of wild-type littermates. Further analyses indicated that loss of stromal ERα leads to increased stromal apoptosis, reduced expression of insulin-like growth factor-1 (IGF-1) and FGF10, and increased expression of BMP4. Collectively, we have established the first in vivo prostate stromal and epithelial selective ERαKO mouse models and the results from these mice indicated that stromal fibroblast ERα plays important roles in prostatic branching morphogenesis via a paracrine fashion. Selective deletion of the ERα gene in mouse prostate epithelial cells by probasin-Cre does not affect the regular prostate development and homeostasis.

Full Text

Duke Authors

Cited Authors

  • Chen, M; Yeh, C-R; Shyr, C-R; Lin, H-H; Da, J; Yeh, S

Published Date

  • July 2012

Published In

Volume / Issue

  • 14 / 4

Start / End Page

  • 546 - 555

PubMed ID

  • 22609821

Pubmed Central ID

  • 22609821

Electronic International Standard Serial Number (EISSN)

  • 1745-7262

Digital Object Identifier (DOI)

  • 10.1038/aja.2011.181

Language

  • eng

Conference Location

  • China