Advancing ICOS agonism in solid tumors: lessons from INDUCE-1

<p>The inducible T-cell co-stimulator (ICOS, CD278) represents an appealing yet complex target within the CD28 immunoglobulin receptor superfamily. Unlike constitutively expressed co-stimulatory molecules, ICOS is minimally present on nai&#x0308;ve T cells and is upregulated following T-cell receptor engagement. This inducible expression pattern, and its crosstalk with other co-stimulatory pathways such as OX40, 4-1BB, CD40, and CD28, position ICOS as a…