Autocrine activation of MAPK signaling mediates intrinsic tolerance to androgen deprivation in LY6D prostate cancer cells

Ivana Steiner, Teresita del N.J. Flores-Tellez, Renaud Mevel, Amin Ali, Pengbo Wang, Pieta Schofield, Caron Behan, Nicholas Forsythe, Garry Ashton, Catherine Taylor, Ian G. Mills, Pedro Oliveira, Simon S. McDade, Dietmar M. Zaiss, Ananya Choudhury, Georges Lacaud, Esther Baena*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    Abstract / Description of output

    The emergence of castration-resistant prostate cancer remains an area of unmet clinical need. We recently identified a subpopulation of normal prostate progenitor cells, characterized by an intrinsic resistance to androgen deprivation and expression of LY6D. We here demonstrate that conditional deletion of PTEN in the murine prostate epithelium causes an expansion of transformed LY6D+ progenitor cells without impairing stem cell properties. Transcriptomic analyses of LY6D+ luminal cells identified an autocrine positive feedback loop, based on the secretion of amphiregulin (AREG)-mediated activation of mitogen-activated protein kinase (MAPK) signaling, increasing cellular fitness and organoid formation. Pharmacological interference with this pathway overcomes the castration-resistant properties of LY6D+ cells with a suppression of organoid formation and loss of LY6D+ cells in vivo. Notably, LY6D+ tumor cells are enriched in high-grade and androgen-resistant prostate cancer, providing clinical evidence for their contribution to advanced disease. Our data indicate that early interference with MAPK inhibitors can prevent progression of castration-resistant prostate cancer.

    Original languageEnglish
    Article number112377
    Number of pages30
    JournalCell Reports
    Issue number4
    Publication statusPublished - 14 Apr 2023

    Keywords / Materials (for Non-textual outputs)

    • autocrine MAPK signaling
    • castration resistance
    • CP: Cancer
    • CP: Cell biology
    • LY6D
    • prostate cancer


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