Phase 1 study of KHK2455, a long-acting, potent and selective IDO1 inhibitor, in combination with avelumab in patients with locally advanced or metastatic urothelial carcinoma
Background
Dual inhibition of indoleamine 2,3-dioxygenase 1 (IDO1) and programmed death-ligand 1 (PD-L1) may alleviate suppression of antitumor immune responses by overcoming redundant immunosuppressive pathways. This study evaluated the combination o…