CAY10505 is primarily utilized in research settings as a potent and selective inhibitor of diacylglycerol kinase alpha (DGKα). It is employed to study the role of DGKα in cellular signaling pathways, particularly in immune responses and cancer biology. By inhibiting DGKα, researchers can investigate its impact on T-cell activation, proliferation, and function, which is crucial for understanding immune regulation and developing potential immunotherapies. Additionally, CAY10505 is used to explore its effects on lipid metabolism and signaling in cancer cells, providing insights into novel therapeutic targets for oncology research. Its application extends to studying the broader implications of DGKα in diseases where lipid signaling plays a critical role.