Cytokines and immune pathways

Cytokines and immune pathways encompass a vast network of signaling molecules and intracellular cascades that coordinate the body's response to infection, injury, and environmental stimuli. Cytokines, including interleukins, interferons, and chemokines, act as chemical messengers that bind to specific cell-surface receptors to initiate biological responses such as cell proliferation, differentiation, and activation (StatPearls: Cytokines). These pathways, such as the JAK-STAT and NF-kappaB signaling routes, are fundamental to both innate and adaptive immunity (NIH: Signaling Pathways). Dysregulation of cytokine signaling is central to the pathogenesis of autoimmune diseases like rheumatoid arthritis, inflammatory bowel disease, and the life-threatening systemic inflammatory response known as a cytokine storm (PubMed: PMC7195077). Consequently, many of the most successful modern therapeutics are designed to modulate these pathways by neutralizing specific cytokines or inhibiting their downstream signaling components. However, because these pathways are essential for host defense, their therapeutic inhibition often necessitates a careful balance between efficacy and the risk of serious infections or malignancy (Nature Reviews Drug Discovery).

Other names

Cytokine signaling pathwaysImmune system signalingInflammatory cytokine networkImmune response pathways

Therapeutic strategies involve the neutralization of circulating cytokines, competitive blockade of cell-surface receptors, or the inhibition of intracellular signaling molecules such as Janus kinases (JAKs) to prevent downstream gene transcription.