Cell Reports (Apr 2022)

Mesenchymal and stem-like prostate cancer linked to therapy-induced lineage plasticity and metastasis

  • Hyunho Han,
  • Yan Wang,
  • Josue Curto,
  • Sreeharsha Gurrapu,
  • Sara Laudato,
  • Alekya Rumandla,
  • Goutam Chakraborty,
  • Xiaobo Wang,
  • Hong Chen,
  • Yan Jiang,
  • Dhiraj Kumar,
  • Emily G. Caggiano,
  • Monica Capogiri,
  • Boyu Zhang,
  • Yan Ji,
  • Sankar N. Maity,
  • Min Hu,
  • Shanshan Bai,
  • Ana M. Aparicio,
  • Eleni Efstathiou,
  • Christopher J. Logothetis,
  • Nicholas Navin,
  • Nora M. Navone,
  • Yu Chen,
  • Filippo G. Giancotti

Journal volume & issue
Vol. 39, no. 1
p. 110595

Abstract

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Summary: Bioinformatic analysis of 94 patient-derived xenografts (PDXs), cell lines, and organoids (PCOs) identifies three intrinsic transcriptional subtypes of metastatic castration-resistant prostate cancer: androgen receptor (AR) pathway + prostate cancer (PC) (ARPC), mesenchymal and stem-like PC (MSPC), and neuroendocrine PC (NEPC). A sizable proportion of castration-resistant and metastatic stage PC (M-CRPC) cases are admixtures of ARPC and MSPC. Analysis of clinical datasets and mechanistic studies indicates that MSPC arises from ARPC as a consequence of therapy-induced lineage plasticity. AR blockade with enzalutamide induces (1) transcriptional silencing of TP53 and hence dedifferentiation to a hybrid epithelial and mesenchymal and stem-like state and (2) inhibition of BMP signaling, which promotes resistance to AR inhibition. Enzalutamide-tolerant LNCaP cells re-enter the cell cycle in response to neuregulin and generate metastasis in mice. Combined inhibition of HER2/3 and AR or mTORC1 exhibits efficacy in models of ARPC and MSPC or MSPC, respectively. These results define MSPC, trace its origin to therapy-induced lineage plasticity, and reveal its sensitivity to HER2/3 inhibition.

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