Cytokine signaling in immune cells

Cytokine signaling in immune cells is a fundamental biological process where extracellular signaling proteins, known as cytokines, bind to specific high-affinity receptors on the surface of immune cells to trigger intracellular biochemical cascades (O'Shea et al., 2015). These pathways, most notably the Janus kinase-Signal Transducer and Activator of Transcription (JAK-STAT) pathway, regulate critical cellular functions including activation, proliferation, and differentiation (Kulasiri et al., 2017). In a healthy immune system, these signals coordinate the response to pathogens and maintain tissue homeostasis; however, aberrant or chronic activation of cytokine signaling is a primary driver of autoimmune diseases, chronic inflammation, and certain cancers (Dinarello, 2007). Therapeutic strategies targeting this process include monoclonal antibodies that neutralize specific cytokines (e.g., TNF-alpha, IL-6) or their receptors, as well as small-molecule inhibitors that block downstream intracellular kinases (Villarino et al., 2017). Because these pathways are central to host defense, therapeutic modulation often requires a balance between reducing pathological inflammation and maintaining sufficient immune surveillance to prevent opportunistic infections (O'Shea et al., 2013). This entry is classified as incorrect as a single target because it describes a broad physiological process involving hundreds of distinct molecular targets rather than a specific protein or receptor.

Other names

Cytokine-mediated signaling pathwayCytokine signaling pathwayImmune cell cytokine signalingJAK-STAT signaling pathway

Inhibition of cytokine-receptor binding via monoclonal antibodies or soluble receptors, and inhibition of intracellular signal transduction via small-molecule kinase inhibitors (e.g., JAK inhibitors).