Tankyrase inhibition sensitizes melanoma to PD-1 immune checkpoint blockade in syngeneic mouse models

Commun Biol. 2020 Apr 24;3(1):196. doi: 10.1038/s42003-020-0916-2.

Abstract

The development of immune checkpoint inhibitors represents a major breakthrough in cancer therapy. Nevertheless, a substantial number of patients fail to respond to checkpoint pathway blockade. Evidence for WNT/β-catenin signaling-mediated immune evasion is found in a subset of cancers including melanoma. Currently, there are no therapeutic strategies available for targeting WNT/β-catenin signaling. Here we show that a specific small-molecule tankyrase inhibitor, G007-LK, decreases WNT/β-catenin and YAP signaling in the syngeneic murine B16-F10 and Clone M-3 melanoma models and sensitizes the tumors to anti-PD-1 immune checkpoint therapy. Mechanistically, we demonstrate that the synergistic effect of tankyrase and checkpoint inhibitor treatment is dependent on loss of β-catenin in the tumor cells, anti-PD-1-stimulated infiltration of T cells into the tumor and induction of an IFNγ- and CD8+ T cell-mediated anti-tumor immune response. Our study uncovers a combinatorial therapeutical strategy using tankyrase inhibition to overcome β-catenin-mediated resistance to immune checkpoint blockade in melanoma.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adaptor Proteins, Signal Transducing / genetics
  • Adaptor Proteins, Signal Transducing / metabolism
  • Animals
  • Antineoplastic Combined Chemotherapy Protocols / pharmacology*
  • CD8-Positive T-Lymphocytes / drug effects
  • CD8-Positive T-Lymphocytes / immunology
  • CD8-Positive T-Lymphocytes / metabolism
  • Cytotoxicity, Immunologic / drug effects
  • Drug Synergism
  • Enzyme Inhibitors / pharmacology*
  • Female
  • HEK293 Cells
  • Humans
  • Immune Checkpoint Inhibitors / pharmacology*
  • Interferon-gamma / metabolism
  • Lymphocytes, Tumor-Infiltrating / drug effects
  • Lymphocytes, Tumor-Infiltrating / immunology
  • Lymphocytes, Tumor-Infiltrating / metabolism
  • Melanoma, Experimental / drug therapy*
  • Melanoma, Experimental / enzymology
  • Melanoma, Experimental / immunology
  • Melanoma, Experimental / pathology
  • Mice, Inbred C57BL
  • Mice, Inbred DBA
  • Mice, Transgenic
  • Programmed Cell Death 1 Receptor / antagonists & inhibitors*
  • Programmed Cell Death 1 Receptor / metabolism
  • Skin Neoplasms / drug therapy*
  • Skin Neoplasms / enzymology
  • Skin Neoplasms / immunology
  • Skin Neoplasms / pathology
  • Sulfones / pharmacology*
  • Tankyrases / antagonists & inhibitors*
  • Tankyrases / metabolism
  • Triazoles / pharmacology*
  • Tumor Burden / drug effects
  • Wnt Signaling Pathway / drug effects*
  • YAP-Signaling Proteins
  • beta Catenin / genetics
  • beta Catenin / metabolism

Substances

  • Adaptor Proteins, Signal Transducing
  • CTNNB1 protein, mouse
  • Enzyme Inhibitors
  • G007-LK
  • IFNG protein, mouse
  • Immune Checkpoint Inhibitors
  • Pdcd1 protein, mouse
  • Programmed Cell Death 1 Receptor
  • Sulfones
  • Triazoles
  • YAP-Signaling Proteins
  • Yap1 protein, mouse
  • beta Catenin
  • Interferon-gamma
  • Tankyrases