Immune and cytokine signaling pathways

Immune and cytokine signaling pathways represent a complex network of intracellular and extracellular communication channels that regulate the body's defense mechanisms and inflammatory responses (StatPearls, 2023). These pathways are initiated when cytokines—small signaling proteins—bind to specific cell-surface receptors, triggering a cascade of downstream events often involving the Janus kinase (JAK)/Signal Transducer and Activator of Transcription (STAT) pathway, Nuclear Factor-kappa B (NF-κB) signaling, or Mitogen-Activated Protein Kinase (MAPK) cascades (NCBI, 2017). Dysregulation of these pathways is a hallmark of numerous pathologies, including chronic inflammatory diseases, autoimmune disorders, and various cancers where aberrant signaling promotes tumor growth and immune evasion (Nature Reviews Immunology, 2020). Pharmacological intervention typically involves monoclonal antibodies that neutralize cytokines or their receptors, as well as small-molecule inhibitors targeting intracellular signaling enzymes (PubMed, 2022). While highly effective in treating conditions like rheumatoid arthritis and psoriasis, modulating these pathways carries significant risks of systemic immunosuppression and opportunistic infections (Frontiers in Immunology, 2021).

Other names

Cytokine signalingImmune signalingInflammatory signaling pathwaysCytokine-mediated signaling

Inhibition of cytokine-receptor binding, inhibition of intracellular signal transduction (e.g., JAK/STAT), and modulation of downstream gene transcription to reduce inflammatory mediator production (NCBI, 2017; PubMed, 2022).