Neovascular pruning by IDO1 inhibitors can potentiate immunogenic cytotoxicity of ischemia-targeted agents to synergistically enhance anti-PD-1 responsiveness

Improving therapeutic outcomes for patients with lung tumors, arising either as primary lesions or metastatic colonies, is of vital clinical importance. Building on preclinical evidence for IDO1's role in promoting inflammatory neovascularization of lung tumors, this study demonstrates how the intratumoral ischemic stress elicited by IDO1 inhibition can potentiate the immunogenic cytotoxicity of ischemia-targeted agents to effectively leverage immune checkpoint blockade responsiveness to confer a synergistic survival benefit. These findings provide a novel perspective on how IDO1 inhibitors can impact tumor biology and open up new possibilities for therapeutic applications.