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-N5060
    Estragole
    Modulator 99.21%
    Estragole (4-Allylanisole) is a relatively nontoxic volatile terpenoid ether and major component of the essential oil from many plants. Estragole significantly triggers Apoptosis, suppresses LPS-induced intracellular ROS production. Estragole activats Nrf-2 and regulates NF-κB. Estragole has anti-toxoplasma, anti-inflammatory, anti-edema, antioxidant and immunomodulatory properties. Estragole blocks DRG neuron excitability. Estragole has improves gastric ulcer activity.
    Estragole
  • HY-90003A
    Tianeptine sodium salt
    Inhibitor 99.90%
    Tianeptine sodium salt is a selective facilitator of 5-HT uptake. Tianeptine sodium salt suppresses MMP-9 via suppression of the PI3K/Akt-mediated NF-κB pathway. Tianeptine sodium salt has no affinity for a wide range of receptors, including 5-HT and dopamine (IC50>10 μM) and has no effect on noradrenalin or dopamine uptake. Tianeptine sodium salt has antidepressant, anxiolytic, analgesic and neuroprotective activities.
    Tianeptine sodium salt
  • HY-107818
    4-Hydroxychalcone
    Inhibitor 99.29%
    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-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-N1363
    Royal Jelly acid
    Inhibitor 99.42%
    Royal Jelly Acid ((E)-Queen Bee Acid) is a major fatty acid found in royal jelly with oral bioavailability, exhibiting anti-inflammatory, anticancer, antimalarial, antiprotozoal, and neuroregulatory activities. Royal Jelly Acid can be used for research in various fields, including cancer, infections, immune inflammation, and neurological diseases.
    Royal Jelly acid
  • 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-N2481
    Oroxylin A-7-O-glucuronide
    Inhibitor 99.83%
    Oroxylin A-7-O-glucuronide (oroxyloside) is an orally active flavonoid glucuronide and metabolite of Oroxylin A (HY-N0560). Oroxylin A-7-O-glucuronide can be extracted from the dried root of Scutellaria baicalensis. Oroxylin A-7-O-glucuronide exhibits prolyl oligopeptidase inhibitory activity. Oroxylin A-7-O-glucuronide inhibits the JNK pathway, upregulates PPARγ, and inhibits NF-κB p65 nuclear translocation. Oroxylin A-7-O-glucuronide reduces cytokine (IL-1β, IL-6) production. Oroxylin A-7-O-glucuronide exhibits anti-angiogenic, anti-tumor (glioma, liver cancer), anti-inflammatory, and hepatoprotective activities.
    Oroxylin A-7-O-glucuronide
  • HY-N6246
    Asperulosidic Acid
    Inhibitor 99.72%
    Asperulosidic Acid (ASPA), a bioactive iridoid glycoside, is extracted from the herbs of Hedyotis diffusa Willd. Asperulosidic Acid (ASPA) has anti-tumor, anti-oxidant, and anti-inflammatory activities. ASPA is related to the inhibition of inflammatory cytokines (TNF-α, IL-6) and mediators via suppression of the NF-κB and mitogen-activated protein kinase (MAPK) signaling pathways.
    Asperulosidic Acid
  • HY-153368
    Zomiradomide
    Inhibitor
    Zomiradomide is an orally active PROTAC degrader for IRAK4 (DC50=6 nM), thereby inhibiting the NF-κB signaling pathway. Zomiradomide acts also as a molecular glue, recruiting Ikaros and Aiolos, and mediating their degradation (DC50 for Ikaros is 1 nM), thereby activating the type I IFN signaling pathway. (Pink: target protein ligand PROTAC IRAK4 ligand-5 (HY-168311), Blue: E3 ligase ligand Thalidomide-4-Br (HY-W039116), Black: linker (HY-168313))
    Zomiradomide
  • HY-133708
    β-Glucogallin
    Inhibitor 99.82%
    β-Glucogallin is an orally active and selective aldose reductase (AKR1B1) inhibitor with an IC50 value of 58 μM when using Glyceraldehyde (HY-128748) as AKR1B1 substrate. β-Glucogallin reduces ROS, PDGF, RAGE, and NF-κB. β-Glucogallin increases SOD. β-Glucogallin has antioxidant and hepatoprotective effects. β-Glucogallin can be used in retinal research.
    β-Glucogallin
  • HY-N0277
    Aconine
    Inhibitor 99.78%
    Aconine inhibits receptor activator of nuclear factor (NF)-κB ligand (RANKL)-induced NF-κB activation.
    Aconine
  • HY-W006957
    N6-(2-Hydroxyethyl)adenosine
    Inhibitor 99.85%
    N6-(2-Hydroxyethyl)adenosine is a purine nucleoside analog. N6-(2-Hydroxyethyl)adenosine inhibits NF-κB/Smad signaling pathway, exhibits anti-hyperglycemia, antioxidant, antitumor and anti-inflammatory and insecticidal activities. N6-(2-Hydroxyethyl)adenosine is orally active.
    N6-(2-Hydroxyethyl)adenosine
  • HY-N2497
    Isoliquiritin apioside
    Inhibitor 99.87%
    Isoliquiritin apioside significantly decreases PMA-induced increases in MMP9 activities and suppresses PMA-induced activation of MAPK and NF-κB. Isoliquiritin apioside auppresseses invasiveness and angiogenesis of cancer cells and endothelial cells.
    Isoliquiritin apioside
  • HY-105935
    Keracyanin chloride
    Inhibitor 99.90%
    Keracyanin chloride inhibits NF-κB/FAK/MAPK signaling pathway. Keracyanin chloride exhibits antioxidant, anti-inflammatory and hypoglycemic effects, and is orally active.
    Keracyanin chloride
  • 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-128598
    MD2-TLR4-IN-1
    Inhibitor 98.16%
    MD2-TLR4-IN-1 is a myeloid differentiation protein 2/toll-like receptor 4 (MD2-TLR4) complex antagonist. MD2-TLR4-IN-1 inhibits Lipopolysaccharides (HY-D1056) (LPS)-induced expression of TNF-α and IL-6 in macrophages with IC50 values of 0.89 μM and 0.53 μM, respectively. MD2-TLR4-IN-1 can be used for the study of acute lung injury (ALI).
    MD2-TLR4-IN-1
  • HY-N0106
    (Rac)-Salvianic acid A sodium
    Inhibitor ≥98.0%
    (Rac)-Salvianic acid A sodium is the racemic form of Salvianic acid A (HY-N1913). Salvianic acid A is an orally active phenolic compound that induces Nrf2/HO-1 activation and inhibits the NF-κB pathway, and it also activates the mitochondrial antioxidant defense system (Mitochondrial Metabolism). Salvianic acid A exhibits anti-inflammatory, antioxidant, and anti-apoptotic properties (Apoptosis), demonstrating potential for research into inflammation and cardiovascular diseases.
    (Rac)-Salvianic acid A sodium
  • HY-B0072
    Tropisetron
    Inhibitor 99.93%
    Tropisetron is an orally active 5-HT3R antagonist (Ki = 5.3 nM) as well as being a potent and selective α7 nicotinic partial agonist (EC50 = 1.3 μM). Tropisetron prevents phosphorylation and activation of the p38 MAPK. Tropisetron inhibits both IL-2 gene transcription and IL-2 synthesis in stimulated T cells. Tropisetron inhibits the binding to DNA and the transcriptional activity of NFAT and AP-1. Tropisetron is anti-inflammatory and antiemetic. Tropisetron has antitumor and neuroprotective effects. Tropisetron can be studied in research for diseases including hemorrhagic cystitis, chronic joint inflammation, lung cancer and chronic cerebral hypoperfusion.
    Tropisetron
  • HY-N1356
    Reticuline
    Inhibitor 98.91%
    Reticuline shows anti-inflammatory effects through JAK2/STAT3 and NF-κB signaling pathways. Reticuline inhibits mRNA expressions of TNF-α, and IL-6 and reduces the phosphorylation levels of JAK2 and STAT3. Reticuline exhibits cardiovascular effects.
    Reticuline
  • HY-N4150
    Quercetagitrin
    Inhibitor 98.34%
    Quercetagitrin (Quercetagetin-7-O-glucoside) is a natural product that can be isolated from the African marigold (Tagetes erecta). Quercetagitrin has anti-inflammatory activity. Quercetagitrin inhibits Tau accumulation. Quercetagitrin can reverse neuroinflammation and cognitive deficits in P301S-Tau transgenic mouse model through inhibiting NF-κB activation. Quercetagitrin is a dual-target inhibitor of PTPN6 (IC50 = 1 μM) and PTPN9 (IC50 = 1.7 μM). Quercetagitrin enhances glucose uptake by mature C2C12 myoblasts. Quercetagitrin can be studied in research for Alzheimer’s disease and type 2 diabetes.
    Quercetagitrin
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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