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

NF-κB

Nuclear factor-κB; Nuclear factor-kappaB

NF-κB

Related Products

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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.

NF-κB Isoform Specific Products:

NF-κB Isoform Comparison
Cat. No. Product Name Effect Purity Chemical Structure
  • HY-W130878
    4-Octylphenol
    4-Octylphenol is a hormone disruptor that has gender-specific effects on male reproductive cells, significantly reducing the mitotic index and the number of spermatogonia. 4-Octylphenol can cause inflammatory damage to fish gills by activating the complement system through the C3a/C3aR axis and the C5a/C5aR1 axis, this leads to complement activation and causes immune suppression due to the imbalance between Th1/Th2 cells and regulatory T cells (Treg)/Th17 cells, as well as inflammatory damage via the Toll-like receptor 7 (Toll-like Receptor (TLR))/IκBα/NF-κB pathway.
    4-Octylphenol
  • HY-N2543R
    Damascenone (Standard)
    		Inhibitor
    Damascenone (Standard) is the analytical standard of Damascenone. This product is intended for research and analytical applications. Damascenone ((E/Z)-Damascenone) is an active compound of Epipremnum pinnatum with anti-inflammatory activity. Damascenone is a mixture complex of E-isomer-Damascenone and Z-isomer Damascenone.
    Damascenone (Standard)
  • HY-121893
    p53-MDM2-IN-3
    		Inhibitor
    p53-MDM2-IN-3 (Compound 5s) is an orally active p53-MDM2 inhibitor with a Ki value of 0.25 μM. p53-MDM2-IN-3 exerts antitumor activity by inhibiting NF-κB pathway.
    p53-MDM2-IN-3
  • HY-N13098
    Elatoside F
    Elatoside F is a triterpenoid saponin with anti-inflammatory activity. Elatoside F inhibits lipopolysaccharide-induced nitric oxide production and nuclear factor NF-κB activation. Elatoside F can be isolated from Aralia elata in one step.
    Elatoside F
  • HY-N6946R
    Mitraphylline (Standard)
    Mitraphylline (Standard) is the analytical standard of Mitraphylline. This product is intended for research and analytical applications. 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 (Standard)
  • HY-130073
    Amorfrutin A
    		Inhibitor
    Amorfrutin A is the inhibition of NF-κB activation, that inhibits TNF-α-induced IκBα degradation, p65 nuclear translocation, and DNA-binding activity. Amorfrutin A promotes TNF-α-induced apoptosis in HeLa cell through promotion of caspase-3 and PARP proteolysis.
    Amorfrutin A
  • HY-N2450R
    Sulforaphene (Standard)
    		Inhibitor
    Sulforaphene, isolated from radish seeds, exhibits an ED50 against velvetleaf seedlings approximately 2 x 10-4 M. Sulforaphene promotes cancer cells apoptosis and inhibits migration via inhibiting EGFR, p-ERK1/2, NF‐κB and other signals.
    Sulforaphene (Standard)
  • HY-B0190AR
    Nafamostat mesylate (Standard)
    Nafamostat (mesylate) (Standard) is the analytical standard of Nafamostat (mesylate). This product is intended for research and analytical applications. Nafamostat mesylate (FUT-175), an anticoagulant, is a synthetic serine protease inhibitor. Nafamostat mesylate has anticancer and antivirus effect. Nafamostat mesylate induce apoptosis by up-regulating the expression of tumor necrosis factor receptor-1 (TNFR1). Nafamostat mesylate can be used in the development of the pathological thickening of the arterial wall.
    Nafamostat mesylate (Standard)
  • HY-N0847R
    Micheliolide (Standard)
    		Inhibitor
    Micheliolide is a sesquiterpene lactone with anti-cancer and anti-inflammatory effects, which is derived from Michelia compressa and Michelia champaca. Micheliolide can attenuate high glucose-stimulated NF-κB activation, IκBα degradation, and the expression of MCP-1, TGF-β1, and FN in mouse mesangial cells. Micheliolide inhibits LPS (HY-D1056)-induced activation of NF-κB and PI3K/Akt/p70S6K pathways to play an anti-inflammatory role. Micheliolide inhibits dextran sodium sulphate (DSS) (HY-116282)-induced inflammatory intestinal disease, colitis-associated cancer and rheumatic arthritis.
    Micheliolide (Standard)
  • HY-119459R
    Fluopyram (Standard)
    		Activator
    Fluopyram (Standard) is the analytical standard of Fluopyram (HY-119459). This product is intended for research and analytical applications. Fluopyram is an orally active succinate dehydrogenase inhibitor, antifungal and nematicide. Fluopyram inhibits succinate dehydrogenase activity, activates CAR/PXR nuclear receptors, and increases caspase-3, TNF-α and NF-κB. Fluopyram inhibits the growth of F. virguliforme, Botrytis cinerea and Alternaria solani with EC50 values of 3.35, 5.389 and 0.244 µg/mL, respectively. Fluopyram induces liver and thyroid tumor formation. Fluopyram is nephrotoxic and embryotoxic.
    Fluopyram (Standard)
  • HY-18739R
    Phorbol 12-myristate 13-acetate (Standard)
    		Activator
    Phorbol 12-myristate 13-acetate (Standard) is the analytical standard of Phorbol 12-myristate 13-acetate. This product is intended for research and analytical applications. Phorbol 12-myristate 13-acetate (PMA), a phorbol ester, is a dual SphK and protein kinase C (PKC) activator. Phorbol 12-myristate 13-acetate is a NF-κB activator. Phorbol 12-myristate 13-acetate induces differentiation in THP-1 cells (Validated by MedChemExpress (MCE)).
    Phorbol 12-myristate 13-acetate (Standard)
  • HY-14645B
    DHMEQ racemate
    		Inhibitor
    DHMEQ racemate is a NF-κB inhibitor. DHMEQ racemate is less active than (-)-DHMEQ.
    DHMEQ racemate
  • HY-N0267R
    Hypaconitine (Standard)
    		Inhibitor
    Hypaconitine (Standard) is the analytical standard of Hypaconitine. This product is intended for research and analytical applications. Hypaconitine inhibits the KCNH2 current with an IC50 of 8.1 nM, and exhibits cardiotoxicity. Hypaconitine inhibits TGF-β1-induced epithelial-mesenchymal transition (EMT) in A549 cell through the inhibition of NF-κB nuclear translocation. Hypaconitine acts as the neuromuscular blocker. Hypaconitine is orally active.
    Hypaconitine (Standard)
  • HY-128423R
    Tylvalosin tartrate (Standard)
    		Inhibitor
    Tylvalosin (tartrate) (Standard) is the analytical standard of Tylvalosin (tartrate). This product is intended for research and analytical applications. Tylvalosin (Acetylisovaleryltylosin) tartrate is an orally active, broad-spectrum macrolide antibiotic with antimicrobial activity. Tylvalosin tartrate is an antiviral agent useful in studying PRRSV infection. Tylvalosin tartrate induces apoptosis. Tylvalosin tartrate also has anti-inflammatory activity, relieves oxidative stress, and alleviates acute lung injury by inhibiting NF-κB activation[4].
    Tylvalosin tartrate (Standard)
  • HY-N6857R
    Armepavine (Standard)
    		Inhibitor
    Armepavine (Standard) is the analytical standard of Armepavine. This product is intended for research and analytical applications. Armepavine, an active compound from Nelumbo nucifera, exerts not only anti-inflammatory effects on human peripheral blood mononuclear cells, but also immunosuppressive effects on T lymphocytes and on lupus nephritic mice. Armepavine inhibits TNF-α-induced MAPK and NF-κB signaling cascades.
    Armepavine (Standard)
  • HY-107566A
    Conessine dihydrobromide
    		Inhibitor
    Conessine dihydrobromide is an orally active and BBB-penetrable selective histamine H3 receptor antagonist. The pKi values of Conessine dihydrobromide for rat and human H3 receptors are 7.61 and 8.27, respectively. Conessine dihydrobromide is an inhibitor of the multidrug efflux pump system in Pseudomonas aeruginosa and can enhance the activity of antibiotics. Conessine dihydrobromide has antimalarial activity. Conessine dihydrobromide can also be used in the research of muscle atrophy.
    Conessine dihydrobromide
  • HY-N0668R
    Rubusoside (Standard)
    		Inhibitor
    Rubusoside (Standard) is the analytical standard of Rubusoside. This product is intended for research and analytical applications. Rubusoside is a diterpene glycoside that is also a sweetener and solubilizer with anti-angiogenic, anti-cancer, anti-obesity, anti-allergic and anti-asthmatic effects. Rubusoside attenuates airway hyperresponsiveness and reduces inflammatory cells in bronchoalveolar lavage fluid (BALF), reducing OVA (HY-W250978)-induced airway inflammation. Rubusoside also prevents palmitic acid-induced lipotoxicity in pancreatic INS-1 cells, reduces the transport of human glucose transporters GLUT-1 and fructose GLUT-5, and inhibits NF-κB and α-amylase (α-amylase).
    Rubusoside (Standard)
  • HY-B1971S1
    Deltamethrin-d6
    Deltamethrin-d6 (Decamethrin-d6) is deuterium labeled Deltamethrin. Deltamethrin (Decamethrin) is an orally active synthetic pyrethroid insecticide. Deltamethrin induces oxidative stress and results in inflammation and apoptosis via inhibiting Nrf2/HO-1 pathway. Deltamethrin has an anticancer effect by inducing apoptosis. Deltamethrin can be used extensively in pest control.
    Deltamethrin-d<sub>6</sub>
  • HY-13010R
    Laquinimod (Standard)
    		Inhibitor
    Laquinimod (Standard) is the analytical standard of Laquinimod. This product is intended for research and analytical applications. Laquinimod (ABR-215062), an orally available carboxamide derivative, is a potent immunomodulator which prevents neurodegeneration and inflammation in the central nervous system. Laquinimod reduces astrocytic NF-κB activation to protect from Cuprizone-induced demyelination. Laquinimod has the potential for relapsing remitting (RR) and chronic progressive (CP) forms of multiple sclerosis (MS; RRMS or CPMS) as well as neurodegenerative diseases research.
    Laquinimod (Standard)
  • HY-N0440R
    Germacrone (Standard)
    		Inhibitor
    Germacrone (Standard) is an analytical standard of Gemmacrone (HY-N0440). This product is intended for research and analytical applications. Germacrone (Standard) is a sesquiterpene compound with multiple biological activities. Germacrone (Standard) inhibits the H1N1 and H3N2 influenza A viruses and the influenza B virus. Germacrone (Standard) blocks the progressionof arthritis by regulating Th1/Th2 balance and inhibiting NF-κB signaling. Germacrone (Standard) can arrest the cell cycle at G0/G1 and G2/M phases and induce apoptosis in breast cancer cells. Germacrone (Standard) inhibits 5α-reductase and has anti-androgenic effect. Germacrone (Standard) has neuroprotective functions and can be used for the study of traumatic brain injury (TBI). Germacrone (Standard) also has antioxidant activity.
    Germacrone (Standard)
Cat. No. Product Name / Synonyms Application Reactivity
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Download NF-κB Signaling Pathway Map.

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.

NF-κB Isoform Comparison

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