Molecular Therapy: Oncology (Dec 2024)

Local treatment of HVJ-E with T cell costimulatory molecule stimulation elicits systemic anti-tumor effects

  • Airi Ishibashi,
  • Yue Li,
  • Yuuta Hisatomi,
  • Noriko Ohta,
  • Yuko Uegaki,
  • Atsushi Tanemura,
  • Riuko Ohashi,
  • Koji Kitamura,
  • Kotaro Saga,
  • Yasuhide Yoshimura,
  • Satoko Inubushi,
  • Kyoso Ishida,
  • Sadahiro Iwabuchi,
  • Shinichi Hashimoto,
  • Eiji Kiyohara,
  • Hideo Yagita,
  • Yasufumi Kaneda,
  • Keisuke Nimura

Journal volume & issue
Vol. 32, no. 4
p. 200893

Abstract

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The tumor-infiltrating lymphocyte (TIL) is a crucial factor in controlling tumor growth. A therapeutic method activating TIL is desired for treating patients with metastatic tumors. Here, we show that treating a local tumor with a combination therapy of UV-irradiated hemagglutinating virus of Japan envelope (HVJ-E) plus agonist antibodies, including OX40, against T cell costimulatory molecules induces systemic anti-tumor effects in a T cell-dependent manner in multiple cancer cell lines. Transcriptome and T cell receptor repertoire analyses revealed that HVJ-E + anti-OX40 antibody treatment activates CD4 and CD8 T cells and promotes T cell trafficking between tumors. These systemic anti-tumor effects required an association between Nkg2d and Nkg2d ligands. Our findings provide insights into how systemic anti-tumor effects are induced and may help the development of therapeutic strategies for eliciting such effects.

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