Agonizing over the Stimulatory Immune Checkpoint ICOS.

Lee, Jerry C; Fong, Lawrence · Clin Cancer Res · 2022

editorial · Level V

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Abstract

Vopratelimab, an anti-ICOS (inducible costimulator of T cells) agonist, alone and in combination with nivolumab, possesses limited toxicity and modest clinical activity in a large phase I/II trial. This treatment induced ICOS expression of CD4+ T cells, which may enable biomarkers for patient selection. Nevertheless, T-cell agonists as cancer immunotherapies continue to be challenging. See related article by Yap et al., p. 3695.

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