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-10227S
    Bortezomib-d8
    		Inhibitor 98.0%
    Bortezomib-d8 is the deuterium labeled Bortezomib. Bortezomib (PS-341) is a reversible and selective proteasome inhibitor, and potently inhibits 20S proteasome (Ki=0.6 nM) by targeting a threonine residue. Bortezomib disrupts the cell cycle, induces apoptosis, and inhibits NF-κB. Bortezomib is the first proteasome inhibitor anticancer agent. Bortezomib can be used for the study of multiple myeloma (MM). Bortezomib effectively inhibits TREM2 expression in tumor-associated macrophages (TAMs).
    Bortezomib-d<sub>8</sub>
  • HY-N1414
    (E)-3',6-Disinapoylsucrose
    		Inhibitor 99.59%
    (E)-3',6-Disinapoylsucrose is an orally active, blood-brain barrier permeable neuroprotective agent that inhibits Aβ protein aggregation. (E)-3',6-Disinapoylsucrose exerts anxiolytic, anti-inflammatory and cognitive-enhancing effects. (E)-3',6-Disinapoylsucrose regulates the TrkB/BDNF signaling pathway, inhibits the expression of NF-κB p65, reduces pro-inflammatory cytokine levels, and alleviates neuronal damage. (E)-3',6-Disinapoylsucrose also enhances the functions of central 5-HT and noradrenergic systems, thereby improving spatial learning and memory abilities and reducing anxiety-like behaviors. (E)-3',6-Disinapoylsucrose can be used for the research of related diseases such as Alzheimer's disease, depression, memory impairment and anxiety disorder.
    (E)-3',6-Disinapoylsucrose
  • HY-142026
    Vitisin A
    		Inhibitor
    Vitisin A ((+)-Vitisin A) is an orally active natural product with multiple pharmacological activities including anti-inflammatory, anti-tumor, anti-oxidant, anti-pathogenic microorganism, hypoglycemic and lipid-regulating, anti-osteoporotic, neuroprotective and cardiovascular protective effects. Vitisin A exhibits inhibitory effects on human AChE and MAO-B with IC50 values of 1.29 µM and 4.94 µM, respectively. Vitisin A inhibits the ERK, MAPK, NF-κB, STAT1, HMGCR and TRAF6 pathways, downregulates the related phosphorylation and protein expression, while activates the Nrf2/HO-1 pathway and upregulates p21 expression. Vitisin A induces tumor cell apoptosis and cell cycle arrest, inhibits adipogenesis and lipid accumulation, while alleviates oxidative stress, suppresses inflammatory responses, blocks hepatic fibrosis, Cuproptosis and cholesterol synthesis, and increases the expression levels of central BDNF and TrkB. Vitisin A can be used in the research of tumors, infectious diseases, metabolic diseases, bone and joint diseases, liver diseases, skin injuries, as well as neurodegenerative and cognitive dysfunction-related diseases.
    Vitisin A
  • HY-136340
    21-Acetoxypregna-1,4,9(11),16-tetraene-3,20-dione
    		Inhibitor 99.93%
    21-Acetoxypregna-1,4,9(11),16-tetraene-3,20-dione is an intermediate of delta 9,11 steroids synthesis, for example, Vamorolone (HY-109017). The delta 9,11 steroids are modifications of glucocorticoids and has anti-inflammatory properties. The delta 9,11 steroids are agents for protection against cell damage (lipid peroxidation) and inhibition of neovascularization.
    21-Acetoxypregna-1,4,9(11),16-tetraene-3,20-dione
  • HY-P10839
    NBD peptide
    		Inhibitor 98.02%
    NBD peptide inhibits NF-κB signaling pathway through inhibition of the NEMO-IKK complex combination. NBD peptide exhibits anti-inflammatory efficacy through block of pro-inflammatory cytokines production. NBD peptide exhibits immunosuppressive activity through regulation of immune cells. NBD peptide enhances its transmembrane ability by combining with cell-penetrating peptide HIV-TAT.
    NBD peptide
  • HY-N8284
    Tomentosin
    		Inhibitor 98.95%
    Tomentosin is an orally active natural sesquiterpenoid lactone. Tomentosin exhibits multiple activities such as anti-tumor, anti-fungal, anti-inflammatory, anti-oxidant and neuroprotective effects. Tomentosin can inhibit tumor cell proliferation, migration and invasion, and induce apoptosis. Tomentosin can be used in the research of tumors, inflammation and nervous system diseases.
    Tomentosin
  • HY-N2421
    Sequoyitol
    		Inhibitor 98.0%
    Sequoyitol (5-O-Methyl-myo-inositol) is an orally active hypoglycemic agent and antioxidant. Sequoyitol can be isolated from herbaceous plants. Sequoyitol downregulates the expression of NF-κB and TGF-β1, reduces ROS production and malondialdehyde levels, and enhances total antioxidant capacity. Sequoyitol activates the insulin signaling pathway, including the phosphorylation of IR, IRS1 and Akt. Sequoyitol increases serum insulin levels, inhibits hepatic glucose production, and promotes cellular glucose uptake. Sequoyitol antagonizes TNFα-induced inhibition of the insulin signaling pathway, and decreases blood urea nitrogen and serum creatinine levels. Sequoyitol elicits potential peaks in the chemosensors of adult and larval Atrophaneura alcinous, and acts as an oviposition stimulant for female Atrophaneura alcinous. Sequoyitol can be used in research related to type 2 diabetes, insulin resistance, hyperglycemia, impaired glucose tolerance and diabetic nephropathy.
    Sequoyitol
  • HY-32735R
    Triptolide (Standard)
    		Inhibitor
    Triptolide (Standard) is the analytical standard of Triptolide. This product is intended for research and analytical applications. 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 (Standard)
  • HY-N0822R
    Shikonin (Standard)
    		Inhibitor
    Shikonin (Standard) is the analytical standard of Shikonin. This product is intended for research and analytical applications. Shikonin is a major component of a Chinese herbal medicine named zicao. Shikonin is a potent TMEM16A chloride channel inhibitor with an IC50 of 6.5 μM. Shikonin is a specific pyruvate kinase M2 (PKM2) inhibitor and can also inhibit TNF-α and NF-κB pathway. Shikonin decreases exosome secretion through the inhibition of glycolysis. Shikonin inhibits AIM2 inflammasome activation.
    Shikonin (Standard)
  • HY-W015490S
    1,4-Naphthoquinone-d6
    		Inhibitor 99.20%
    1,4-Naphthoquinone-d6 is the deuterium labeled 1,4-Naphthoquinone. 1,4-Naphthoquinone is an inhibitor with broad-spectrum inhibitory activity targeting DNA polymerase, NF-κB and monoamine oxidase (MAO-A/B), with antibacterial and anti-biofilm efficacy. 1,4-Naphthoquinone is a competitive inhibitor of MAO-B (Ki=1.4 μM) and a non-competitive inhibitor of MAO-A (Ki=7.7 μM). 1,4-Naphthoquinone inhibits DNA polymerase pol α, β, γ, δ, ε, λ with IC50 ranging from 5.57-128 μM. 1,4-Naphthoquinone inhibits tumor cell proliferation, induces apoptosis and necrosis, and has anti-angiogenic and anti-inflammatory activities by inducing oxidative stress, depleting glutathione (GSH), inhibiting DNA polymerase-mediated DNA synthesis and blocking NF-κB nuclear translocation. 1,4-Naphthoquinone can be used in anti-bacterial , anti-tumor and anti-inflammatory studies, including inhibition of melanoma and colon cancer cell growth and endothelial cell function, as well as LPS-induced inflammation models.
    1,4-Naphthoquinone-d<sub>6</sub>
  • HY-169703
    SPA0355
    		Inhibitor 99.54%
    SPA0355 is a thiourea derivative that has antioxidant and anti-inflammatory properties. SPA0355 inhibits the RANKL (receptor activator of nuclear factor κB ligand) induced osteoclast formation in primary bone marrow-derived macrophages. SPA0355 also suppresses the activation of the MAPKs, Akt, and NF-κB pathways. Additionally, SPA0355 promotes osteoblast differentiation, increases alkaline phosphatase activity, and enhances mineral nodule formation. SPA0355 can protect ovariectomized mice from bone loss by stimulating osteoblast differentiation and inhibiting osteoclast resorption, making it useful for studying postmenopausal osteoporosis.
    SPA0355
  • HY-N0722R
    Neochlorogenic acid (Standard)
    		Inhibitor
    Neochlorogenic acid (Standard) is the analytical standard of Neochlorogenic acid. This product is intended for research and analytical applications. Neochlorogenic acid is a natural polyphenolic compound found in dried fruits and other plants. Neochlorogenic acid inhibits the production of TNF-α and IL-1β. Neochlorogenic acid suppresses iNOS and COX-2 protein expression. Neochlorogenic acid also inhibits phosphorylated NF-κB p65 and p38 MAPK activation.
    Neochlorogenic acid (Standard)
  • HY-138956
    MAY0132
    		Inhibitor 99.93%
    MAY0132 is a potent and selective EPAC2 inhibitor with an IC50 of 0.4 μM. MAY0132 significantly inhibits replication of HMPV, AdV and RSV, reduces viral infection-induced cytokine/chemokine production, and inhibits NF-κB activation. MAY0132 has antiviral activity and can be used in the study of respiratory virus infection.
    MAY0132
  • HY-N3796
    Echinulin
    		Activator 98.63%
    Echinulin (Echinuline) is a cyclic dipeptide carrying a triprenylated indole moiety. Echinulin contributes to the activation of T cell subsets, which leads to NF-κB activation.Echinulin exerts its immune roles by the NF-κB pathway.Echinulin has the potential to serve as a immunotherapeutic agent.
    Echinulin
  • HY-B0898R
    Ceftiofur sodium (Standard)
    		Inhibitor
    Ceftiofur sodium (Standard) is the analytical standard of Ceftiofur sodium (HY-B0898). This product is intended for research and analytical applications. Ceftiofur sodium is a cell wall synthesis inhibitor that targets bacterial penicillin-binding proteins (PBPs) and has anti-inflammatory effects in endotoxemia. Ceftiofur sodium exerts bactericidal effects by inhibiting the synthesis of bacterial cell wall peptidoglycan, leading to bacterial cell lysis. Ceftiofur sodium also inhibits the activation of NF-κB and MAPKs, thereby reducing the secretion of pro-inflammatory cytokines such as TNF-α, IL-1β, and IL-6.
    Ceftiofur sodium (Standard)
  • HY-N2065R
    Withaferin A (Standard)
    		Inhibitor
    Withaferin A (Standard) is the analytical standard of Withaferin A. This product is intended for research and analytical applications. Withaferin A is a steroidal lactone isolated from Withania somnifera, inhibits NF-kB activation and targets vimentin, with potent antiinflammatory and anticancer activities. Withaferin A is an inhibitor of endothelial protein C receptor (EPCR) shedding.
    Withaferin A (Standard)
  • HY-N0170R
    Indole-3-carbinol (Standard)
    		Inhibitor
    Indole-3-carbinol (Standard) is the analytical standard of Indole-3-carbinol. This product is intended for research and analytical applications. Indole-3-carbinol (I3C) inhibits NF-κB activity and also is an Aryl hydrocarbon receptor (AhR) agonist, and an inhibitor of WWP1 (WW domain-containing ubiquitin E3 ligase 1).
    Indole-3-carbinol (Standard)
  • HY-153516
    NIK-IN-2
    		Inhibitor 99.00%
    NIK-IN-2 (compound 1) is a potent inhibitor of NF-κB-inducing kinase (NIK), with the pIC50 of 7.4. NIK-IN-2 plays an important role in cancer research.
    NIK-IN-2
  • HY-W026930
    Benzanthrone
    		Activator
    Benzanthrone is an immunotoxic, pro-inflammatory Photosensitizer. Benzanthrone upregulates iNOS, COX-2 and inflammatory cytokines; activates ERK1/2, p38, JNK, AP-1 and NF-κB; inhibits Nrf2; and induces oxidative stress and DNA damage. Upon radiation exposure, Benzanthrone generates singlet oxygen and superoxide anion radicals, induces photohemolysis and lipid peroxidation, and alters the levels of skin xenobiotic enzymes. Benzanthrone exhibits differential genotoxicity in different cell lines. Benzanthrone possesses skin tumor-initiating and promoting activities. Benzanthrone can be used in skin tumor-related studies.
    Benzanthrone
  • HY-N4308
    Hexamethylquercetagetin
    		Inhibitor 98.0%
    Hexamethylquercetagetin (Hexa-O-methylquercetagetin; Quercetagetin hexamethyl ether; 3,5,6,7,3',4'-Hexamethoxyflavone) is an orally active NF-κB inhibitor. Hexamethylquercetagetin inhibits NF-κB-derived luciferase activity, reduces phosphorylated p65 and IκBα, Cyclin D1, Bcl-2 and blocks TNFα-induced NF-κB activation. Hexamethylquercetagetin inhibits survival and proliferation of cervical carcinoma cells. Hexamethylquercetagetin suppresses tumor volume and weight in BALB/c nude mouse xenograft models of cervical carcinoma. Hexamethylquercetagetin can be used for the research of cancer, such as cervical carcinoma.
    Hexamethylquercetagetin
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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