Expression characteristics of prostate-derived Ets factor support a role in breast and prostate cancer progression.

Published

Journal Article

The purpose of this study was to understand the characteristics of prostate-derived Ets factor (PDEF) protein expression in breast and prostate cancer progression. A polyclonal antibody specific to PDEF was raised and reacted with tissue microarrays consisting of benign breast, in situ ductal, invasive ductal, and invasive lobular breast carcinomas. The antibody was also reacted with tissue microarrays, including benign prostate, prostate intraepithelial neoplasias (PINs), and prostate carcinomas. Increased expression of PDEF was identified in 18%, 50%, 46%, and 51% of benign breast tissues, intraductal, invasive ductal, and invasive lobular carcinomas, respectively. Importantly, in matched samples of benign breast vs tumor, 90% showed higher expression of PDEF in the tumor tissue. Moreover, in invasive breast carcinomas, increased PDEF expression tended to correlate with Her2/neu overexpression. Increased expression of PDEF was also found in 27%, 33%, and 40% of benign prostate tissues, PIN samples, and prostate adenocarcinomas, respectively. Again, in matching samples of cancer vs benign and cancer vs PIN, 68% and 70%, respectively, showed increased expression in the malignant tissue. Moreover, PDEF was found to be more highly expressed in tumors with intermediate or high Gleason score compared with low-grade tumors (P < .01). In addition, R1881 treatment induced PDEF expression in the LNCaP prostate tumor cell line, suggesting regulation of PDEF by androgens in vivo. Together, these results for the first time show frequent increased expression of PDEF protein in breast and prostate tumors and support a role for PDEF in breast and prostate cancer progression.

Full Text

Duke Authors

Cited Authors

  • Sood, AK; Saxena, R; Groth, J; Desouki, MM; Cheewakriangkrai, C; Rodabaugh, KJ; Kasyapa, CS; Geradts, J

Published Date

  • November 2007

Published In

Volume / Issue

  • 38 / 11

Start / End Page

  • 1628 - 1638

PubMed ID

  • 17521701

Pubmed Central ID

  • 17521701

International Standard Serial Number (ISSN)

  • 0046-8177

Digital Object Identifier (DOI)

  • 10.1016/j.humpath.2007.03.010

Language

  • eng

Conference Location

  • United States