1. Signaling Pathways
  2. NF-κB
  3. NF-κB

NF-κB

Nuclear factor-κB; Nuclear factor-kappaB

NF-κB (Nuclear factor kappa-light-chain-enhancer of activated B cells) is a protein complex that controls transcription of DNA. NF-κB is found in almost all animal cell types and is involved in cellular responses to stimuli such as stress, cytokines, free radicals, ultraviolet irradiation, oxidized LDL, and bacterial or viral antigens. NF-κB plays a key role in regulating the immune response to infection. Incorrect regulation of NF-κB has been linked to cancer, inflammatory, and autoimmune diseases, septic shock, viral infection, and improper immune development. NF-κB has also been implicated in processes of synaptic plasticity and memory. There are five proteins in the mammalian NF-κB family: NF-κB1, NF-κB2, RelA, RelB, c-Rel.

Cat. No. Product Name Effect Purity Chemical Structure
  • HY-N2855
    Alphitolic acid
    Inhibitor
    Alphitolic acid (Aophitolic acid) is an anti-inflammatory triterpene could found in quercus aliena. Alphitolic acid blocks Akt–NF-κB signaling to induce apoptosis. Alphitolic acid induces autophagy. Alphitolic acid has anti-inflammatory activity and down-regulates the NO and TNF-α production. Alphitolic acid can be used for cancer and inflammation research.
    Alphitolic acid
  • HY-B1640R
    Ethacrynic acid (Standard)
    Inhibitor
    Ethacrynic acid (Standard) is the analytical standard of Ethacrynic acid. This product is intended for research and analytical applications. Ethacrynic acid (Etacrynic acid) is a diuretic. Ethacrynic acid is an inhibitor of glutathione S-transferases (GSTs). Ethacrynic acid is a potent inhibitor of NF-kB-signaling pathway, and also modulates leukotriene formation. Ethacrynic acid also inhibits L-type voltage-dependent and store-operated calcium channel, leading to relaxation of airway smooth muscle (ASM) cells. Ethacrynic acid has anti-inflammatory properties that reduces the retinoid-induced ear edema in mice.
    Ethacrynic acid (Standard)
  • HY-117987
    CPS-11
    Inhibitor 99.39%
    CPS-11 (N-(Hydroxymethyl)thalidomide) a Thalidomide (HY-14658) analogue, is a potent anti-cancer agent. CPS-11 inhibits NF-κB, activates NFAT, and repress cytokine expression through elevated ROS. CPS-11 exhibits a wider activity spectrum and higher potency against MM (multiple myeloma) cell lines.
    CPS-11
  • HY-144765
    NF-κB-IN-4
    Inhibitor 98.51%
    NF-κB-IN-4 (compound 17) is a potent and BBB-penetrated NF-κB pathway inhibitor with blood brain barrier (BBB) permeability. NF-κB-IN-4 exhibits potential anti-neuroinflammatory activity with low toxicity. NF-κB-IN-4 can block the activation and phosphorylation of IκBα, reduce expression of NLRP3, and thus inhibit NF-κB activation. NF-κB-IN-4 can be used for neuroinflammation related diseases research.
    NF-κB-IN-4
  • HY-N3536
    Canthin-6-one
    Inhibitor 99.92%
    Canthin-6-one is an indole alkaloid, displays antibacterial and anti-inflammatory activities.
    Canthin-6-one
  • HY-32735S
    Triptolide-d3
    Inhibitor
    Triptolide-d3 is the deuterium labeled Triptolide. Triptolide is a diterpenoid triepoxide extracted from the root of Tripterygium wilfordii with immunosuppressive, anti-inflammatory, antiproliferative and antitumour effects. Triptolide is a NF-κB activation inhibitor.
    Triptolide-d<sub>3</sub>
  • HY-N3181
    Nodosin
    Inhibitor 98.44%
    Nodosin is an orally active diterpenoid compound that can be isolated from Isodon serra. Nodosin can inhibit the proliferation and induce cell cycle arrest and apoptosis of tumor cells. Nodosin can also inhibit oxidative stress, inflammatory responses, and ferroptosis. Nodosin has anti-inflammatory and anti-tumor activities.
    Nodosin
  • HY-N2101
    Benzoyloxypaeoniflorin
    Inhibitor 98.60%
    Benzoyloxypaeoniflorin, isolated from the root of Paeonia suffruticosa, is a tyrosinase inhibitor against mushroom tyrosinase with IC50 of 0.453 mM. Benzoyloxypaeoniflorin is NF-κB Inhibitor and contributes to improving blood circulation through its inhibitory effect on both platelet aggregation and blood coagulation.
    Benzoyloxypaeoniflorin
  • HY-15530
    CID-2858522
    Inhibitor 99.78%
    CID-2858522 is a highly potent and selective antigen receptor-mediated NF-κB activation inhibitor with an IC50 of 70 nM.
    CID-2858522
  • HY-N3387
    Licoricidin
    Inhibitor ≥98.0%
    Licoricidin (LCD) is isolated from Glycyrrhiza uralensis Fisch, possesses anti-cancer activities. Licoricidin (LCD) inhibit SW480 cells (IC50=7.2 μM) by inducing cycle arrest, apoptosis and autophagy, and is a potential chemopreventive or chemotherapeutic agent against colorectal cancer. Licoricidin (LCD) inhibits Lung Metastasis by inhibition of tumor angiogenesis and lymphangiogenesis as well as changes in the local microenvironment of tumor tissues the anticarcinogenic effect. Licoricidin enhanced gemcitabine-induced cytotoxicity in Osteosarcoma (OS) cells by inactivation of the Akt and NF-κB pathways in vitro and in vivo. Licoricidin blocks UVA-induced photoaging via ROS scavenging, limits the activity of MMP-1, it can be considered as an active ingredient in new topically applied anti-ageing formulations.
    Licoricidin
  • HY-N6812
    Karacoline
    ≥99.0%
    Karacoline, a diterpene alkaloid found in the plant Aconitum kusnezoffii, reduces degradation of the extracellular matrix (ECM) in intervertebral disc degeneration (IDD) via the NF-κB signaling pathway.
    Karacoline
  • HY-N6946
    Mitraphylline
    99.68%
    Mitraphylline is the major pentacyclic oxindolic alkaloid presented in Uncaria tomentosa. Mitraphylline inhibits lipopolysaccharide-mediated activation of primary human neutrophils. Mitraphylline exhibits antiproliferative activity in human glioma and neuroblastoma cell lines. Mitraphylline can inhibit interleukin release in vivo.
    Mitraphylline
  • HY-W015883R
    Fumaric acid (Standard)
    Inhibitor
    Fumaric acid (Standard) is the analytical standard of Fumaric acid. This product is intended for research and analytical applications. Fumaric acid is an unsaturated dicarbonic acid, an intermediate product of the citric acid cycle that provides intracellular energy in the form of ATP. Fumaric acid exerts anti-inflammatory effects by inhibiting the NF-κB signaling pathway dependent on p38 MAPK. Fumaric acid can be used in the study of pregnancy-induced hypertension.
    Fumaric acid (Standard)
  • HY-B0289
    Erdosteine
    Inhibitor 99.54%
    Erdosteine inhibits lipopolysaccharide (LPS)-induced NF-κB activation. Erdosteine has muco-modulatory, anti-bacterial, anti-inflammatory and anti-oxidant effects.
    Erdosteine
  • HY-134353B
    ADP-β-S trilithium
    Activator
    ADP-β-S trilithium is the trilithium salt form of ADP-β-S (HY-134353). ADP-β-S trilithium is the activator for P2Y12 receptor, which upregulates levels of IL-1βand IL-6 production in microglial cells, promotes the phosphorylation and nuclear translocation of NF-κB, and enhances the activation of the NLRP3 inflammasome.
    ADP-β-S trilithium
  • HY-P990018
    Boserolimab
    Activator 99.00%
    Boserolimab (MK-5890) is a humanized agonist monoclonal antibody that binds to CD27 to provide a costimulatory signal that enhances T-cell–mediated responses.
    Boserolimab
  • HY-N4231
    Lucyoside B
    Inhibitor 99.21%
    Lucyoside B inhibits the production of inflammatory mediators via both NF-κB and activator protein-1 pathways in activated macrophages.
    Lucyoside B
  • HY-124651
    SEMBL
    Inhibitor 99.16%
    SEMBL is a potent NF-κB inhibitor. SEMBL can inhibit NF-κB-DNA binding, and also inhibits NF-κB-dependent inflammatory cytokine secretions. SEMBL inhibits cancer cell migration and invasion via decreasing MMP expression. SEMBL can be used for researching anticancer.
    SEMBL
  • HY-N0191R
    Andrographolide (Standard)
    Inhibitor
    Andrographolide (Standard) is the analytical standard of Andrographolide. This product is intended for research and analytical applications. Andrographolide is a NF-κB inhibitor, which inhibits NF-κB activation through covalent modification of a cysteine residue on p50 in endothelial cells without affecting IκBα degradation or p50/p65 nuclear translocation. Andrographolide has antiviral effects.
    Andrographolide (Standard)
  • HY-N0276
    Flaconitine
    Inhibitor 99.77%
    Flaconitine is considered to be a NF-κB inhibitor.
    Flaconitine
Cat. No. Product Name / Synonyms Application Reactivity

NF-κB transcription factors are critical regulators of immunity, stress responses, apoptosis and differentiation. In mammals, there are five members of the transcription factor NF-κB family: RELA (p65), RELB and c-REL, and the precursor proteins NF-κB1 (p105) and NF-κB2 (p100), which are processed into p50 and p52, respectively. NF-κB transcription factors bind as dimers to κB sites in promoters and enhancers of a variety of genes and induce or repress transcription. NF-κB activation occurs via two major signaling pathways: the canonical and the non-canonical NF-κB signaling pathways[1]

 

The canonical NF-κB pathway is triggered by signals from a large variety of immune receptors, such as TNFR, TLR, and IL-1R, which activate TAK1. TAK1 then activates IκB kinase (IKK) complex, composed of catalytic (IKKα and IKKβ) and regulatory (NEMO) subunits, via phosphorylation of IKKβ. Upon stimulation, the IKK complex, largely through IKKβ, phosphorylates members of the inhibitor of κB (IκB) family, such as IκBα and the IκB-like molecule p105, which sequester NF-κB members in the cytoplasm. IκBα associates with dimers of p50 and members of the REL family (RELA or c-REL), whereas p105 associates with p50 or REL (RELA or c-REL). Upon phosphorylation by IKK, IκBα and p105 are degradated in the proteasome, resulting in the nuclear translocation of canonical NF-κB family members, which bind to specific DNA elements, in the form of various dimeric complexes, including RELA-p50, c-REL-p50, and p50-p50. Atypical, IKK-independent pathways of NF-κB induction also provide mechanisms to integrate parallel signaling pathways to increase NF-κB activity, such as hypoxia, UV and genotoxic stress.

 

The non-canonical NF-κB pathway is induced by certain TNF superfamily members, such as CD40L, BAFF and lymphotoxin-β (LT-β), which stimulates the recruitment of TRAF2, TRAF3, cIAP1/2 to the receptor complex. Activated cIAP mediates K48 ubiquitylation and proteasomal degradation of TRAF3, resulting in stabilization and accumulation of the NFκB-inducing kinase (NIK). NIK phosphorylates and activates IKKα, which in turn phosphorylates p100, triggering p100 processing, and leading to the generation of p52 and the nuclear translocation of p52 and RELB[2][3].

 

Reference:

[1]. Oeckinghaus A, et al. The NF-kappaB family of transcription factors and its regulation.Cold Spring Harb Perspect Biol. 2009 Oct;1(4):a000034. 
[2]. Taniguchi K, et al. NF-κB, inflammation, immunity and cancer: coming of age. Nat Rev Immunol. 2018 May;18(5):309-324.
[3]. Perkins ND,et al. Integrating cell-signalling pathways with NF-kappaB and IKK function. Nat Rev Mol Cell Biol. 2007 Jan;8(1):49-62.

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