MS4322 is primarily utilized in the field of medical research, particularly in the study of cancer treatment. It functions as a potent and selective inhibitor of the enzyme PI3Kδ, which plays a crucial role in cell growth and survival. By inhibiting this enzyme, MS4322 helps in halting the proliferation of cancer cells, making it a valuable compound in the development of targeted cancer therapies. Additionally, it is used in preclinical studies to understand the mechanisms of PI3Kδ signaling pathways and their implications in various types of cancers, including leukemia and lymphoma. This compound aids researchers in evaluating the efficacy of new therapeutic strategies and in the design of more effective cancer treatments.