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-78131B
    (R)-(-)-Ibuprofen
    Inhibitor 99.96%
    (R)-(-)-Ibuprofen is the R enantiomer of Ibuprofen, inactive on COX, inhibits NF-κB activation; (R)-(-)-Ibuprofen exhibits anti-inflammatory and antinociceptive effects.
    (R)-(-)-Ibuprofen
  • HY-123856
    MY10
    Inhibitor 99.87%
    MY10 is a potent and orally active receptor protein tyrosine phosphatase (RPTPβ/ζ) inhibitor. MY10 reduces NF-κB p65 expression. MY10 activates tyrosine phosphorylation of c-Met. MY10 prevents the alcohol-induced downregulation of Ptprz1 and Alk expression. MY10 attenuates binge-like ethanol consumption and ethanol reward. MY10 can be used in the study of neurological and vascular diseases.
    MY10
  • HY-B0289
    Erdosteine
    Inhibitor 99.62%
    Erdosteine inhibits lipopolysaccharide (LPS)-induced NF-κB activation. Erdosteine has muco-modulatory, anti-bacterial, anti-inflammatory and anti-oxidant effects.
    Erdosteine
  • HY-N0896
    Inulicin
    Inhibitor 99.94%
    Inulicin (1-O-Acetylbritannilactone) is an active compound that inhibits VEGF-mediated activation of Src and FAK. Inulicin (1-O-Acetylbritannilactone) inhibits LPS-induced PGE2 production and COX-2 expression, and NF-κB activation and translocation.
    Inulicin
  • HY-17630
    Edasalonexent
    Inhibitor 99.17%
    Edasalonexent (CAT-1004) is an orally bioavailable NF-κB inhibitor.
    Edasalonexent
  • HY-120149
    Inotodiol
    Inhibitor 98.29%
    Inotodiol activates p53 signaling pathway, inhibits MMP-2/9, and exhibits antitumor activity in cancer cell HeLa. Inotodiol inhibits the generation of ROS and exhibits antioxidant and neuroprotective effects. Inotodiol inhibits the activation of MAPK and NF-κB signaling pathway, and exhibits anti-inflammatory activity. Inotodiol inhibits TLR-4 mediated TNF-α production (IC50s in BMMC and BMDM is 0.7 μM and 3.0 μM), inhibits the degranulation in mast cell, exhibits anti-allergic activity. Inotodiol is orally active.
    Inotodiol
  • HY-16126
    Carboxyamidotriazole
    Inhibitor 99.82%
    Carboxyamidotriazole (L-651582) is an orally active cytostatic inhibitor of nonvoltage-operated calcium channels and calcium channel-mediated signaling pathways. Carboxyamidotriazole inhibits NF-κB, MAPK activation and NO production. Carboxyamidotriazole has anti-angiogenic and anti-inflammatory activities. Carboxyamidotriazole has anticancer activity against liver cancer, lung cancer and leukemia.
    Carboxyamidotriazole
  • HY-B0513
    Methylthiouracil
    Inhibitor ≥98.0%
    Methylthiouracil is an antithyroid agent. Methylthiouracil suppresses the production TNF-α and IL-6, and the activation of NF-κB and ERK1/2.
    Methylthiouracil
  • HY-A0068
    Aurothioglucose
    Inhibitor
    Aurothioglucose (Gold thioglucose), containing monovalent gold ion, is a potent active-site inhibitor of TrxR1 (thioredoxin reductase 1), with an IC50 of 65 nM. Aurothioglucose inhibits the DNA binding of NF-κB in vitro. Aurothioglucose shows anti-HIV and anti-rheumatic activities.
    Aurothioglucose
  • HY-N0907
    Ginsenoside Rg6
    Inhibitor 99.13%
    Ginsenoside Rg6 inhibits TNF-α-induced NF-κB transcriptional activity with an IC50 of 29.34 μM in HepG2 cells. Ginsenoside Rg6 also exhibits apoptosis-inducing effect.
    Ginsenoside Rg6
  • HY-N6029
    Dehydroevodiamine hydrochloride
    99.93%
    Dehydroevodiamine hydrochloride is isolated from the leaves of Evodia rutaecarpa.
    Dehydroevodiamine hydrochloride
  • HY-N8307
    Syringaresinol
    Inhibitor 98.11%
    Syringaresinol is a lignan that can be extracted from the dragon's blood of the Dracaena tree. Syringaresinol increases NO production by increasing the phosphorylation and dimerization of endothelial NO synthase, exerting a vasodilatory effect. Syringaresinol also inhibits the NF-κB pathway, exerting anti-inflammatory activity and inhibiting arthritis.
    Syringaresinol
  • HY-101402A
    Cyclo(his-pro) TFA
    Inhibitor 99.13%
    Cyclo(his-pro) TFA (Cyclo(histidyl-proline) TFA) is an orally active cyclic dipeptide structurally related to tyreotropin-releasing hormone. Cyclo(his-pro) TFA could inhibit NF-κB nuclear accumulation. Cyclo(his-pro) TFA can cross the brain-blood-barrier and affect diverse inflammatory and stress responses.
    Cyclo(his-pro) TFA
  • HY-141645
    IMM-H007
    Inhibitor
    IMM-H007 (WS070117) is an orally active and potent AMPK (AMP-activated protein kinase) activator and TGFβ1 (transforming growth factor β1) antagonist. IMM-H007 has protective effects in cardiovascular diseases via activation of AMPK. IMM-H007 negatively regulates endothelium inflammation through inactivating NF-κB and JNK/AP1 signaling. IMM-H007 inhibits ABCA1 degradation. IMM-H007 resolves hepatic steatosis in HFD-fed hamsters by the regulation of lipid metabolism. IMM-H007 can be used for the research of nonalcoholic fatty liver disease (NAFLD) and inflammatory atherosclerosis.
    IMM-H007
  • HY-118828
    12-Oxo phytodienoic acid
    99.57%
    12-Oxo phytodienoic acid (12-OPDA) is a plant lipid-derived anti-inflammatory compound. 12-Oxo phytodienoic acid suppresses neuroinflammation by inhibiting Nf-κB and p38 MAPK signaling in Lipopolysaccharides (LPS) (HY-D1056)-activated cells. 12-Oxo phytodienoic acid can be used for neurodegenerative diseases research.
    12-Oxo phytodienoic acid
  • HY-14928
    Lobeglitazone
    Inhibitor
    Lobeglitazone is a new type of thiazolidinedione. Lobeglitazone is the orally active agonist for PPAR with EC50 of 137.4 nM and 546.3 nM for PPARγ and PPARα. Lobeglitazone is the inhibitor for ERK/JNK/Smad/NF-κB signaling pathway. Lobeglitazone exhibits anti-inflammatory, anti-diabetic, anti-fibrotic and anti-atherosclerotic properties.
    Lobeglitazone
  • HY-N0392
    Polygalasaponin F
    Inhibitor 99.85%
    Polygalasaponin F, an oleanane-type triterpenoid saponin extracted from Polygala japonica, decreases the release of the inflammatory cytokine tumor necrosis factor a (TNFa). Polygalasaponin F reduces neuroinflammatory cytokine secretion through the regulation of the TLR4-PI3K/AKT-NF-kB signaling pathway .
    Polygalasaponin F
  • HY-128423A
    Tylvalosin
    Inhibitor 99.00%
    Tylvalosin (Acetylisovaleryltylo?sin) is an orally active, broad-spectrum macrolide antibiotic with antimicrobial activity. Tylvalosin is an antiviral agent used to study PRRSV infection. Tylvalosin induces apoptosis. Tylvalosin also has anti-inflammatory activity, alleviates oxidative stress, and alleviates acute lung injury by inhibiting NF-κB activation.
    Tylvalosin
  • HY-N6046
    Kamebakaurin
    Inhibitor 98.05%
    Kamebakaurin is an orally active diterpenoid compound that can be isolated from Isodon excia (Maxin.). Kamebakaurin can inhibit NF-κB activation by directly targeting the DNA-binding activity of p50. Kamebakaurin can induce apoptosis and cell cycle arrest in tumor cells. Kamebakaurin has anti-inflammatory and anti-tumor activities.
    Kamebakaurin
  • 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
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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