Molecular pathways: Targeting CD96 and TIGIT for cancer immunotherapy

Stephen J. Blake, William C. Dougall, John J. Miles, Michele W.L. Teng, Mark J. Smyth

Research output: Contribution to journalArticlepeer-review

140 Citations (Scopus)

Abstract

The receptors CD96 and TIGIT are expressed on the surface of T and natural killer (NK) cells, and recent studies suggest both play important inhibitory roles in immune function. CD96 has been shown to modulate immune cell activity in mice, with Cd96-/- mice displaying hypersensitive NK-cell responses to immune challenge and significant tumor resistance. TIGIT overexpression has been shown to reduce NK-cell-mediated cytotoxicity. TIGIT is also upregulated on T cells during cancer and chronic viral infection, with expression associated with effector T-cell exhaustion and increased regulatory T-cell suppression. The counterbalance between the putative inhibitory CD96 and TIGIT receptors and the activating receptor, CD226, offers unique strategies for immuno-oncology drug development. Blocking CD96 or TIGIT with mAbs has been shown to improve tumor control in mice, in particular when used in combination with PD-1/PD-L1 blockade. These results have highlighted these pathways as promising new targets for immune modulation. This review will examine the rationale behind targeting CD96 and TIGIT, and discuss the potential approaches in translating these preclinical findings into novel clinical agents.
Original languageEnglish
Pages (from-to)5183-5188
Number of pages6
JournalClinical Cancer Research
Volume22
Issue number21
Early online date12 Sep 2016
DOIs
Publication statusPublished - 1 Nov 2016
Externally publishedYes

Keywords

  • Immunotherapy
  • CD96
  • TIGIT
  • Cancer treatment
  • Patient outcomes

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