Modulation of T Cell Regulation by Interleukin-2 Agonists: Mechanisms and Clinical Implications

IL-2 agonists significantly modulate T cell regulation, impacting activation, proliferation, differentiation, and immune homeostasis. Interleukin-2 (IL-2) is crucial for T cell growth and function, binding to the IL-2 receptor to trigger signaling pathways that balance immune responses. IL-2 promotes the expansion of effector T cells and enhances regulatory T cells (Tregs), preventing autoimmune responses. This review examines the mechanisms of IL-2 agonists on T cell regulation, including their roles in cytotoxic T cells and Tregs proliferation, and immune homeostasis. Clinically, IL-2 agonists show promise in treating autoimmune diseases by boosting Treg function and in cancer immunotherapy by enhancing cytotoxic T cell activity. Optimizing IL-2 therapies to balance these effects is ongoing. IL-2 agonists are pivotal in modulating T cell responses with significant therapeutic potential for autoimmunity and cancer. Understanding IL-2 signaling is crucial for developing targeted treatments leveraging this cytokine's benefits.