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-N6029
    Dehydroevodiamine hydrochloride
    		99.93%
    Dehydroevodiamine hydrochloride is isolated from the leaves of Evodia rutaecarpa.
    Dehydroevodiamine hydrochloride
  • HY-N0906
    Ginsenoside Rk3
    		Inhibitor 99.79%
    Ginsenoside Rk3 is present in the roots Panax ginseng herbs. Ginsenoside Rk3 significantly inhibits TNF-α-induced NF-κB transcriptional activity, with an IC50 of 14.24±1.30 μM in HepG2 cells.
    Ginsenoside Rk3
  • 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-123936
    SR12343
    		Inhibitor 99.66%
    SR12343, an IKK/NF-κB inhibitor, is a NF-κB essential modulator (NEMO)-binding domain (NBD) mimetic. SR12343 inhibits TNF-α- and LPS-induced NF-κB activation by blocking the interaction between IKKβ and NEMO, with an IC50 of 37.02 μM for TNF-α-mediated NF-κB activation. SR12343 suppresses LPS-induced acute pulmonary inflammation in mice. SR12343 can be used for research of inflammatory and degenerative diseases.
    SR12343
  • HY-W160560
    4-Vinylsyringol
    		Inhibitor 99.76%
    4-Vinylsyringol is a phenolic compound with potential antioxidant and anti-inflammatory activities, which can be isolated from rapeseed oil.
    4-Vinylsyringol
  • HY-125740
    Malvidin-3-glucoside chloride
    		Inhibitor 99.87%
    Malvidin-3-glucoside (Malvidin-3-O-glucoside; Oenin) chloride is an orally active inhibitor of the NF-κB pathway, which blocks inflammatory responses induced by TNF-α, reduces IκB-α degradation and p65 nuclear translocation, and upregulates endothelial nitric oxide synthase eNOS to increase NO production. Malvidin-3-glucoside chloride exerts anti-inflammatory and antioxidant effects by inhibiting pro-inflammatory molecules such as MCP-1, ICAM-1, and IL-6, and regulating intestinal microorganisms and metabolites, while protecting endothelial cells and improving intestinal microecological dysbiosis under inflammatory conditions. Malvidin-3-glucoside chloride can be used to study chronic inflammatory-related diseases such as atherosclerosis and inflammatory bowel disease, and has the potential to prevent vascular inflammation and improve intestinal health.
    Malvidin-3-glucoside chloride
  • HY-N0608
    Myrislignan
    		Inhibitor 99.46%
    Myrislignan, a lignan isolated from Myristica fragrans Houtt, possesses anti-inflammatory activities. Myrislignan attenuates LPS-induced inflammation reaction in murine macrophage cells through inhibition of NF-kB signalling pathway activation.
    Myrislignan
  • HY-N2099
    Onjisaponin B
    		Inhibitor 99.06%
    Onjisaponin B is an orally active natural product derived from Polygala tenuifolia. Onjisaponin B inhibits NF-κB p65. Onjisaponin B enhances autophagy and accelerates the degradation of mutant α-synuclein and huntingtin. Onjisaponin B reduces β-amyloid (Aβ) production. Onjisaponin B reduces radiation-induced cell apoptosis. Onjisaponin B has anti-oxidant and anti-inflammatory activities. Onjisaponin B can be used for neurological disease and radiation injury study, and its metabolite tenuifolin (TF) can enter the brain through the BBB.
    Onjisaponin B
  • HY-N3807
    Enniatin B1
    		Inhibitor 99.34%
    Enniatin B1 is a Fusarium mycotoxin. Enniatin B1 inhibits acyl-CoA: cholesterol acyltransferase (ACAT) activity with an IC50 of 73 μM in an enzyme assay using rat liver microsomes. Enniatin B1 crosss the blood-brain barrier. Enniatin B1 decreases the activation of ERK (p44/p42). Enniatin B1 inhibits moderately TNF-α-induced NF-κB activation.
    Enniatin B1
  • HY-111237
    Butyrolactone I
    		Inhibitor 99.80%
    Butyrolactone I is an orally active and ATP-competitive inhibitor of CDK1. Butyrolactone I inhibits NF-κB, cdc2 kinase, Bax, ROS production, modulates the PERK/CHOP. Butyrolactone I mitigates heat-stress-induced Apoptosis. Butyrolactone I shows anti-inflammatory and intestinal protective activity. Butyrolactone I has antitumor effects against non-small cell lung, small cell lung, prostate cancer and leukemia. Butyrolactone I can be used in NASH research.
    Butyrolactone I
  • 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-N7931
    Regaloside A
    		Inhibitor 99.64%
    Regaloside A, a phenylpropanoid, shows significant DPPH radical scavenging activity of 58.0% at 160 ppm. Regaloside A has anti-inflammatory activity.
    Regaloside A
  • HY-N1380S1
    Guaiacol-d3
    		Inhibitor ≥99.0%
    Guaiacol-d3 is the deuterium labeled Guaiacol. Guaiacol, a phenolic compound, inhibits LPS-stimulated COX-2 expression and NF-κB activation. Guaiacol has an anti-inflammatory activity.
    Guaiacol-d<sub>3</sub>
  • HY-112569
    MAT2A inhibitor 2
    		Inhibitor 99.71%
    MAT2A inhibitor 2 is an inhibitor of methionine adenosine transferase 2A (MAT2A) with oral activity. MAT2A inhibitor 2 can be used in osteoporosis study
    MAT2A inhibitor 2
  • HY-107744
    Nalmefene
    		Inhibitor 99.70%
    Nalmefene is a BBB-penetrable opioid receptor modulator. Nalmefene is an antagonist of MOR and DOR, and a partial agonist of KOR. Nalmefene has anti-inflammatory and neuroprotective activities. Nalmefene can be used in the research of reducing alcohol-dependent disorders.
    Nalmefene
  • HY-107352
    Fosfenopril
    		Inhibitor 99.85%
    Fosfenopril (Fosinoprilat) is a potent angiotensin converting enzyme (ACE) inhibitor. Fosfenopril alleviates lipopolysaccharide (LPS)-induced inflammation by inhibiting TLR4/NF-κB signaling in monocytes.
    Fosfenopril
  • HY-119931
    2-Hydroxychalcone
    		Inhibitor 98.08%
    2-hydroxychalcone, a natural flavonoid, is a potent antioxidant, inhibiting lipid peroxidation. 2-Hydroxychalcone induces apoptosis by Bcl-2 downregulation. 2-Hydroxychalcone inhibits the activation of NF-kB.
    2-Hydroxychalcone
  • HY-B1026
    Adelmidrol
    		Inhibitor ≥98.0%
    Adelmidrol exerts important anti-inflammatory effects that are partly dependent on PPARγ. Adelmidrol reduces NF-κB translocation, and COX-2 expression.
    Adelmidrol
  • HY-N7043
    Isosilybin A
    		Inhibitor 99.63%
    Isosilybin A is a PPARγ agonist that can be isolated from silymarin. Isosilybin A activates extrinsic and intrinsic pathways of apoptosis through targeting of the Akt-NF-kB-AR axis. Isosilybin A can relieve the inflammatory response in the rosacea model via inhibiting Erk and p38 signaling pathways and M1 macrophage polarization, with its targets related to RELA and VEGFA. Isosilybin A has anti-prostate cancer (PCA) activity[1][2][3].
    Isosilybin A
  • HY-N8407
    Carminic acid
    		Inhibitor
    Carminic acid is a widely used and orally active natural red pigment that can be used in industries such as food, cosmetics, and pharmaceuticals. In addition, carminic acid has anti-inflammatory and antioxidant activities.
    Carminic acid
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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