Cytokine and inflammatory signaling pathways

Cytokine and inflammatory signaling pathways encompass a vast network of molecular interactions that coordinate the immune system's response to stimuli such as pathogens or tissue injury (StatPearls, 2023). These pathways are initiated when cytokines—small signaling proteins like interleukins (IL), interferons (IFN), and tumor necrosis factors (TNF)—bind to their respective high-affinity receptors on the cell surface (Nature Reviews Immunology, 2018). This binding triggers intracellular signaling cascades, most notably the Janus kinase/signal transducer and activator of transcription (JAK/STAT) pathway and the nuclear factor-kappa B (NF-κB) pathway (Frontiers in Immunology, 2021). These cascades ultimately lead to the transcription of genes involved in cell proliferation, differentiation, and the production of further inflammatory mediators. While these processes are vital for host defense, chronic or excessive activation is linked to the pathogenesis of autoimmune diseases, such as rheumatoid arthritis and inflammatory bowel disease (PubMed, 2022). Therapeutic strategies often involve the use of monoclonal antibodies to sequester cytokines or small molecules to inhibit intracellular kinases, thereby modulating the inflammatory environment (PubChem, 2023). Understanding these pathways is crucial for developing targeted therapies that can suppress pathological inflammation without compromising overall host immunity.

Other names

Inflammatory signalingCytokine signalingPro-inflammatory pathways

Inhibition of pro-inflammatory cytokines, blockade of cytokine receptors, or inhibition of intracellular signaling kinases such as Janus kinases (JAKs) to modulate gene expression and immune cell activation.