eLife (Aug 2017)

Development of Bag-1L as a therapeutic target in androgen receptor-dependent prostate cancer

  • Laura Cato,
  • Antje Neeb,
  • Adam Sharp,
  • Victor Buzón,
  • Scott B Ficarro,
  • Linxiao Yang,
  • Claudia Muhle-Goll,
  • Nane C Kuznik,
  • Ruth Riisnaes,
  • Daniel Nava Rodrigues,
  • Olivier Armant,
  • Victor Gourain,
  • Guillaume Adelmant,
  • Emmanuel A Ntim,
  • Thomas Westerling,
  • David Dolling,
  • Pasquale Rescigno,
  • Ines Figueiredo,
  • Friedrich Fauser,
  • Jennifer Wu,
  • Jaice T Rottenberg,
  • Liubov Shatkina,
  • Claudia Ester,
  • Burkhard Luy,
  • Holger Puchta,
  • Jakob Troppmair,
  • Nicole Jung,
  • Stefan Bräse,
  • Uwe Strähle,
  • Jarrod A Marto,
  • Gerd Ulrich Nienhaus,
  • Bissan Al-Lazikani,
  • Xavier Salvatella,
  • Johann S de Bono,
  • Andrew CB Cato,
  • Myles Brown

DOI
https://doi.org/10.7554/eLife.27159
Journal volume & issue
Vol. 6

Abstract

Read online

Targeting the activation function-1 (AF-1) domain located in the N-terminus of the androgen receptor (AR) is an attractive therapeutic alternative to the current approaches to inhibit AR action in prostate cancer (PCa). Here we show that the AR AF-1 is bound by the cochaperone Bag-1L. Mutations in the AR interaction domain or loss of Bag-1L abrogate AR signaling and reduce PCa growth. Clinically, Bag-1L protein levels increase with progression to castration-resistant PCa (CRPC) and high levels of Bag-1L in primary PCa associate with a reduced clinical benefit from abiraterone when these tumors progress. Intriguingly, residues in Bag-1L important for its interaction with the AR AF-1 are within a potentially druggable pocket, implicating Bag-1L as a potential therapeutic target in PCa.

Keywords