Immune-cell energy metabolism

Class

Immuno-metabolic modulator

Immune cells alter how they generate cellular energy depending on their state of activity. At rest, lymphocytes and macrophages rely mainly on oxidative phosphorylation, a mitochondrial process that generates ATP efficiently but relatively slowly. Once triggered by an antigen or an inflammatory signal, these cells rapidly upshift to aerobic glycolysis, a faster but less efficient pathway that also supplies the raw materials needed for rapid proliferation, protein synthesis, and secretion of signaling molecules called cytokines. This metabolic switch is not incidental; it is required for full effector function. Immuno-metabolic modulators are drugs designed to interfere with, or in some cases support, this metabolic reprogramming, thereby changing how vigorously immune cells respond. Constraining the glycolytic shift can dampen pathological immune activation, which is relevant in autoimmune and chronic inflammatory diseases where immune cells are overactive against the body's own tissues. Conversely, supporting favorable metabolic states in immune cells can be used to sustain their activity in settings such as cancer, where tumor-infiltrating immune cells often become metabolically exhausted. This approach is also being explored in transplantation, where controlling immune cell energy use can influence graft acceptance or rejection. Because metabolic programs are so central to how immune cells behave, this represents a distinct strategy compared with drugs that block a single receptor or cytokine.