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

NF-κB

Nuclear factor-κB; Nuclear factor-kappaB

NF-κB

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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-N6857
    Armepavine
    		Inhibitor 99.53%
    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
  • HY-B0678
    Metaxalone
    		Inhibitor 99.77%
    Metaxalone (AHR438; NSC170959) is an FDA-approved muscle relaxant. Metaxalone acts mainly on the central nervous system and achieves muscle relaxation by inhibiting polysynaptic reflex arcs. In addition, Metaxalone is an inhibitor of MAO-A, which has anti-inflammatory and antioxidant effects. Metaxalone inhibits IL-1β-induced inflammatory phenotype, modulates NF-κB and other related signaling pathways, and decreases MAO-A expression and activity in IL-1β-treated microglia.
    Metaxalone
  • HY-N2381
    Menthone
    		≥98.0%
    Menthone, an orally active monoterpene that can be isolated from plants and Mentha oil with antibacterial, antitumor, antioxidation, and antivirus properties. Menthone is a main volatile component of the essential oil, and has anti-Inflammatory properties in Schistosoma mansoni infection and rheumatoid arthritis.
    Menthone
  • HY-N0613
    Sauchinone
    		Inhibitor 99.88%
    Sauchinone is a diastereomeric lignan isolated from Saururus chinensis (Saururaceae). Sauchinone inhibits LPS-inducible iNOS, TNF-α and COX-2 expression through suppression of I-κBα phosphorylation and p65 nuclear translocation. Sauchinone has anti-inflammatory and antioxidant activity.
    Sauchinone
  • HY-N2098
    Obtusifolin
    		Inhibitor 99.91%
    Obtusifolin, isolated from the seeds of Cassia obtusifolia, regulates the gene expression and production of MUC5AC mucin in airway epithelial cells via inhibiting NF-kB pathway. Obtusifolin suppresses phthalate esters-induced breast cancer bone metastasis by targeting parathyroid hormone-related protein.
    Obtusifolin
  • HY-148877
    AT-533
    		Inhibitor 98.86%
    AT-533 is a potent Hsp90 and HSV inhibitor. AT-533 suppresses tumor growth and angiogenesis by blocking the HIF-1α/VEGF/VEGFR-2 signaling pathway. AT-533 also inhibits the activation of the downstream pathways, including Akt/mTOR/p70S6K, Erk1/2 and FAK. AT-533 inhibits the tube formation, cell migration, and invasion of human umbilical vein endothelial cells (HUVECs).
    AT-533
  • HY-107818
    4-Hydroxychalcone
    		Inhibitor 98.64%
    4-Hydroxychalcone is a chalcone metabolite with anti-angiogenic and anti-inflammatory activities. 4-Hydroxychalcone suppresses angiogenesis by suppression of growth factor pathway with no signs of cytotoxicity. 4-Hydroxychalcone inhibits TNF-α induced NF-κB pathway activation and activates BMP signaling, reduces resistant hypertension (RH) by attenuating hyperaldosteronism and renal injury in mice.
    4-Hydroxychalcone
  • HY-121705
    Propionyl-L-carnitine
    		Inhibitor
    Propionyl-L-carnitine is an orally active L-carnitine derivative. Propionyl-L-carnitine has a high affinity for muscle L-carnitine transferase. Propionyl-L-carnitine increases Apoptosis, Bax, and reduces NF-κB, VCAM-1, MCP-1, and survivin. Propionyl-L-carnitine activates Src kinase, Akt, induces p-AMPK and nitric oxide synthesis. Propionyl-L-carnitine alleviates cardiovascular disease, obesity, and colitis.
    Propionyl-L-carnitine
  • HY-D0162
    Malachite green hemioxalate
    		Inhibitor ≥98.0%
    Malachite green hemioxalate (MCCK1) is a triphenylmethane dye which can be used to detect the release of phosphate in enzymatic reactions. Malachite green hemioxalate has antibacterial activity, which is attributed to inhibition of intracellular enzymes, insertion into DNA and/or interaction with cell membranes. Malachite green hemioxalate is also a potent and selective inhibitor of IKBKE, and inhibits its downstream targets such as IκBα, p65 and IRF3. Malachite green hemioxalate exhibits antitumor activity in vitro and in vivo.
    Malachite green hemioxalate
  • HY-N0721
    Neoandrographolide
    		Inhibitor 99.65%
    Neoandrographolide is a diterpenoid compound isolated from Andrographis paniculata. Neoandrographolide inhibits osteoclasts differentiation and bone resorption through inhibition of MAPK/NF-κB/PI3K/AKT/GSK3β/PPAR/CAMK signaling pathway. Neoandrographolide inhibits apoptosis in rat embryonic ventricular cardiomyocytes. Neoandrographolide inhibits iNOS and the generation of ROS, activates eNOS, exhibiting anti-inflammatory and hypolipidemic activity.
    Neoandrographolide
  • HY-121632
    Quinoclamine
    		Inhibitor 99.55%
    Quinoclamine, a naphthoquinone derivative, is a NF-κB inhibitor. Quinoclamine exhibits anti-cancer activity.
    Quinoclamine
  • HY-N2453
    Convallatoxin
    		Inhibitor 98.85%
    Convallatoxin is a cardiac glycoside isolated from Adonis amurensis Regel et Radde. Convallatoxin ameliorates colitic inflammation via activation of PPARγ and suppression of NF-κB. Convallatoxin is a P-glycoprotein (P-gp) substrate and recognized Val982 as an important amino acid involved in its transport. Convallatoxin is an enhancer of ligand-induced MOR endocytosis with high potency and efficacy. Anti-inflammatory and anti-proliferative properties.
    Convallatoxin
  • HY-N3405
    Lariciresinol
    		Modulator 99.79%
    Lariciresinol is an orally active ingredient. Lariciresinol can be isolated from Arabidopsis thaliana. Lariciresinol inhibits α-glucosidase activity (IC50 of 6.97 μM; Ki of 0.046 μM). Lariciresinol dereases Bcl-2, upregulates Bax and induces Apoptosis. Lariciresinol regulates TGF-β and NF-κB pathways. Lariciresinol has antitumor activity against liver cancer, gastric cancer, and breast cancer. Lariciresinol shows antifungal activity and anti-diabetic activity.
    Lariciresinol
  • HY-N0911
    Rehmannioside A
    		Inhibitor 99.96%
    Rehmannioside A is a neuroprotective agent that can be isolated from Rehmanniae radix. Rehmannioside A can inhibit the release of proinflammatory mediators from microglia and promote M2 polarization in vitro, thereby protecting co-cultured neurons from apoptosis by inhibiting NF-κB and MAPK signaling pathways. Rehmannioside A can be used in spinal cord injury research.
    Rehmannioside A
  • HY-B0780
    Fimasartan
    		Inhibitor 98.55%
    Fimasartan (BRA-657) is an orally effective angiotensin receptor AT1 non-peptide antagonist. Fimasartan has antihypertensive effects. Fimasartan improves neuroinflammation and brain injury mediated by NLRP3 inflammatome after intracerebral hemorrhage, and has neuroprotective effect. Fimasartan inhibits the expression of inducible nitric oxide synthase through the inactivation of NF-κB and activator protein-1.
    Fimasartan
  • HY-N2995
    Poricoic acid A
    		Modulator 98.08%
    Poricoic acid A, isolated from Poria cocos, possesses anti-tumor activity. Poricoic acid A enhances melatonin inhibition of AKI-to-CKD transition by regulating Gas6/AxlNFκB/Nrf2 axis.
    Poricoic acid A
  • HY-N0433
    Astragaloside II
    		99.45%
    Astragaloside II is an orally active Cycloartane-type triterpene glycoside. Astragaloside II can be extracted from Astragalus membranaceus. Astragaloside II inhibits Autophagy, decreases pro-inflammatory cytokines (IL-6, IL-1β), HIF-α, p-p65, p-IκB and increases SOD. Astragaloside II regulates immunity and reduces inflammatory responses. Astragaloside II can be used in the research of diseases such as liver cancer, osteoporosis, immunosuppressive diseases, and ulcerative colitis.
    Astragaloside II
  • HY-W009274
    N-Acetylmuramic acid
    		Inhibitor 99.00%
    N-acetylmuramic acid is a component of the bacterial cell wall peptidoglycan, essential for maintaining cell shape and integrity. N-acetylmuramic acid inhibits spore germination by inhibiting a coat-associated hexosaminidase and a core enzyme. N-acetylmuramic acid is required by Bacteroides forsythus for proliferation and the maintenance of its cell shape. N-Acetylmuramic acid inhibits the p38 MAPK/NF-κB signaling pathway, and exhibits anti-inflammatory activity. N-Acetylmuramic acid is orally active.
    N-Acetylmuramic acid
  • HY-N1490
    14-Deoxy-11,12-didehydroandrographolide
    		Inhibitor 99.91%
    14-Deoxy-11,12-didehydroandrographolide is an analogue of Andrographolide. 14-Deoxy-11,12-didehydroandrographolide inhibits NF-κB activation.
    14-Deoxy-11,12-didehydroandrographolide
  • HY-N8290
    Lactupicrin
    		Inhibitor 99.97%
    Lactupicrin (Lactucopicrin) exhibits analgesic, sedative, antimalarial activities and atheroprotective effect. Lactupicrin inhibits acetylcholinesterase (AChE) with an IC50 of 150.3 μM. Lactupicrin is an orally active characteristic bitter sesquiterpene lactone.
    Lactupicrin
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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