IDO2 and neoplasm: Also, the STING agonist diABZI combined with the indoleamine 2,3 dioxygenase (IDO) inhibitor 1-MT significantly inhibited tumor growth and promoted the recruitment and activation of IFN-γ+CD8+ T cells and DCs, and significantly decreased myeloid-derived suppressor cells that exerted immunosuppressive function (125).