Pharmacological boosting of cGAS activation sensitizes chemotherapy by enhancing antitumor immunity

Cell Rep. 2023 Mar 28;42(3):112275. doi: 10.1016/j.celrep.2023.112275. Epub 2023 Mar 20.

Abstract

Enhancing chemosensitivity is one of the largest unmet medical needs in cancer therapy. Cyclic GMP-AMP synthase (cGAS) connects genome instability caused by platinum-based chemotherapeutics to type I interferon (IFN) response. Here, by using a high-throughput small-molecule microarray-based screening of cGAS interacting compounds, we identify brivanib, known as a dual inhibitor of vascular endothelial growth factor receptor and fibroblast growth factor receptor, as a cGAS modulator. Brivanib markedly enhances cGAS-mediated type I IFN response in tumor cells treated with platinum. Mechanistically, brivanib directly targets cGAS and enhances its DNA binding affinity. Importantly, brivanib synergizes with cisplatin in tumor control by boosting CD8+ T cell response in a tumor-intrinsic cGAS-dependent manner, which is further validated by a patient-derived tumor-like cell clusters model. Taken together, our findings identify cGAS as an unprecedented target of brivanib and provide a rationale for the combination of brivanib with platinum-based chemotherapeutics in cancer treatment.

Keywords: CP: Cancer; brivanib; cGAS; chemosensitization; cyclic GMP-AMP synthase; platinum; type I IFN response.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alanine* / analogs & derivatives
  • Antineoplastic Agents* / administration & dosage
  • CD8-Positive T-Lymphocytes / drug effects
  • CD8-Positive T-Lymphocytes / immunology
  • Cisplatin / administration & dosage
  • High-Throughput Screening Assays
  • Humans
  • Interferons / immunology
  • Neoplasms* / drug therapy
  • Nucleotidyltransferases* / metabolism
  • Triazines*
  • Tumor Cells, Cultured / drug effects

Substances

  • brivanib
  • Triazines
  • Alanine
  • cGAS protein, human
  • Nucleotidyltransferases
  • Interferons
  • Cisplatin
  • Antineoplastic Agents