Nuclear factor kappa B pathway component (NF-κB pathway component)

The Nuclear factor kappa B pathway comprises a family of transcription factors—including the canonical p65/RelA and p50 subunits—along with regulatory kinases such as the IKK complex. This pathway is central to cellular responses against stressors like cytokines, pathogens, oxidative stress, and DNA damage. Activation typically involves upstream signals that trigger the IKK complex to phosphorylate inhibitor proteins such as IκBα. Once phosphorylated, these inhibitors are degraded via ubiquitination pathways. The freed NF‑κB dimer then translocates into the nucleus where it binds DNA at κΒ sites to regulate genes involved in inflammation, immunity, cell proliferation/survival/apoptosis. Curcumin has been shown experimentally to inhibit this cascade by blocking upstream signals leading to IKK activation—thereby preventing downstream proinflammatory gene expression such as ICAM‑1 and IL‑8. Because this entry refers collectively to multiple components within the broader signaling network rather than a unique molecule or receptor with a standard name or abbreviation—and because curcumin modulates several points within this axis—the target description is overly broad for structured data extraction purposes. Curcumin potently inhibits cytokine-mediated NF-kappa B activation by blocking a signal leading to Ikappa B kinase activity. NF-kappa B plays a key role in regulating immune response...and is involved in cellular responses...such as stress and cytokines.

Other names

NF-κB signaling componentsNuclear factor kappa-light-chain-enhancer of activated B cells pathway proteinsIKK complex membersRelA/p65 subunitp50 subunitIκB kinase (IKK)Inhibitor of κB (IκB)

Inhibition of IKK activity leading to reduced phosphorylation/degradation of IκB and suppression of NF‑κB nuclear translocation