NF-κB signaling pathway in macrophages (NF-κB pathway)

The NF-κB signaling pathway in macrophages is a major intracellular signaling cascade that integrates upstream inflammatory cues—typically via pattern recognition receptors, cytokine receptors (notably the TNF receptor superfamily), and other immune sensors—to activate the NF-κB family of transcription factors. Upon activation (usually by infection, tissue damage, or cytokines like TNF-α), the pathway leads to the degradation of IκB inhibitory proteins, nuclear translocation of NF-κB, and transcription of a battery of genes that control inflammation, immune activation, cell survival, and apoptosis. Key cytokine outputs include pro-inflammatory TNF-α and the anti-inflammatory cytokine IL-10; the balance between these (and their complex cross-regulation) shapes the outcome of immune responses and is implicated in numerous diseases, especially chronic inflammation, infection, and cancer. This pathway is a major focus for therapeutic modulation, but targeting must be precise to avoid immunosuppression or paradoxical inflammation.

Other names

NF-κB pathwayCanonical NF-κB signalingMacrophage NF-κB signaling cascade

Inhibition of TNF-alpha to suppress inflammatory output; Inhibition of IKK or NF-κB to reduce transcription of pro-inflammatory genes; Blocking surface receptors (e.g., anti-TNF biologics prevent TNF-α from binding to receptor); Augmentation of IL-10 or STAT3 pathway to enhance anti-inflammatory signaling