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-N0908
    Ginsenoside Rg5
    		Inhibitor 99.87%
    Ginsenoside Rg5 is the main component of Red ginseng and IGF-1R agonist. Ginsenoside Rg5 compets for the binding site of IGF-1R and blocks the binding of IGF-1 to IGF-1R (IC50 about 90 nM). Ginsenoside Rg5 also inhibits the mRNA expression of COX-2 via suppression of the DNA binding activities of NF-κB p65.
    Ginsenoside Rg5
  • HY-122942
    Moracin M
    		Inhibitor 98.90%
    Moracin M is a phenolic component that can be isolated from Mori Cortex, is a potent phosphodiesterase-4 (PDE4) inhibitor with IC50 values of 2.9, 4.5, >40, and >100 μM for PDE4D2, PDE4B2, PDE5A1, and PDE9A2, respectively. Moracin M has anti-inflammatory activity.
    Moracin M
  • HY-119970
    Helenalin
    		Inhibitor 99.75%
    Helenalin is an anti-inflammatory sesquiterpene lactone. Helenalin selectively inhibits transcription factor NF-κB by directly targeting p65. Helenalin has alkylating activity, targets the cysteine sulfhydryl groups in the p65 subunit of NF-κB, thereby inhibits its DNA binding.
    Helenalin
  • HY-N8211
    Gypenoside L
    		Activator 99.55%
    Gypenoside L is a saponin that can be found in Gynostemma pentaphyllum. Gypenoside L increases the SA-β-galactosidase activity, promotes the production of senescence-associated secretory cytokines. Gypenoside L also can activate p38 and ERK MAPK pathways and NF-κB pathway to induce senescence. Gypenoside L exhibits anti-tumor and anti-inflammatory activities.
    Gypenoside L
  • HY-P99673
    Itepekimab
    		Inhibitor 99.40%
    Itepekimab (REGN-3500) is an IgG4 monoclonal antibody against IL-33. Itepekimab reduced airway inflammation and related tissue damage in preliminary clinical studies. Itepekimab has potential effects in asthma, chronic obstructive pulmonary disease (COPD), and atopic dermatitis (AD).
    Itepekimab
  • HY-134477
    NF-κΒ activator 2
    		Activator 99.76%
    NF-κΒ activator 2 is a potent and orally active NF-ҡB activator, with an EC50 of 1.58 μM. NF-κΒ activator 2 induces SOD2 through increasing NF-ҡB expression and activation. NF-κΒ activator 2 can be used for the research of amyotrophic lateral sclerosis (ALS).
    NF-κΒ activator 2
  • HY-B0766
    Bicyclol
    		Inhibitor 99.91%
    Bicyclol (SY801) is an orally active derivative of the traditional Chinese medicine Schisandra chinensis, which has antiviral, anti-inflammatory, immunomodulatory, antioxidant, anti-steatosis, anti-fibrotic and anti-tumor activities. Bicyclol regulates the expression of heat shock proteins and plays an anti-apoptosis role in hepatocytes. Bicyclol reduces the activation of NF-κB and the levels of inflammatory factors in hepatocytes infected with hepatitis C virus (HCV) by inhibiting the activation of the ROS-MAPK-NF-κB pathway, and prevents ferroptosis in acute liver injury. Bicyclol can change the expression of Mdr-1, GSH/GST and Bcl-2, increase the intracellular concentration of anticancer drugs, and sensitize drug-resistant cells to anticancer drugs. Bicyclol inhibits the proliferation of human malignant hepatoma cells by regulating the PI3K/AKT pathway and the Ras/Raf/MEK/ERK pathway. Bicyclol can be used in the study of chronic hepatitis, acute liver injury, nonalcoholic fatty liver disease, liver fibrosis and hepatocellular carcinoma.
    Bicyclol
  • HY-N0272
    Eleutheroside E
    		Inhibitor 99.58%
    Eleutheroside E is an important component of ginseng that can be taken orally. Eleutheroside E has anti-inflammatory and antioxidant properties, and it helps reduce apoptosis in heart cells caused by hypoxia-reoxygenation (H/R) damage. Eleutheroside E can improve type 2 diabetes, enhance cognitive function, and has neuroprotective effects.
    Eleutheroside E
  • HY-124284
    Hexamethylene bisacetamide
    		Inhibitor 99.56%
    Hexamethylene bisacetamide (HMBA) is a differentiation inducer and selective bromine domain inhibitor that can differentiate across the blood-brain barrier. Hexamethylene bisacetamide can induce tumor cell differentiation and inhibit cell proliferation, showing antitumor activity. Hexamethylene bisacetamide induces apoptosis by Notch1, Bcl-2 and p53 signaling pathways. In addition, Hexamethylene bisacetamide improves the obesity phenotype of mice.
    Hexamethylene bisacetamide
  • HY-N1949
    Homoplantaginin
    		Inhibitor 99.90%
    Homoplantaginin is a flavonoid from a traditional Chinese medicine Salvia plebeia with antiinflammatory and antioxidant properties. Homoplantaginin could inhibit TNF-α and IL-6 mRNA expression, IKKβ and NF-κB phosphorylation.
    Homoplantaginin
  • HY-107574
    TC-E 5003
    		Modulator 98.03%
    TC-E 5003 is a selective protein arginine methyltransferase 1 (PRMT1) inhibitor with an IC50 of 1.5 µM against hPRMT1. TC-E 5003 modulates the lipopolysaccharide (LPS) (HY-D1056)-induced AP-1 and NF-κB signaling pathways with anti-inflammatory properties. TC-E 5003 also upregulates the expression of Ucp1 and Fgf21, activates protein kinase A signaling and lipolysis in primary subcutaneous adipocytes from both mouse and humans. TC-E 5003 is promising for research of obesity and associated metabolic disorders, oxidative stress, inflammation and cancers.
    TC-E 5003
  • HY-B0612A
    Lercanidipine hydrochloride
    		Inhibitor 99.80%
    Lercanidipine is a third-generation, lipophilic, brain-penetrant, vascular-selective and orally active dihydropyridine-calcium channel blocker with a pIC50 of 7.74 (converts from μM). Lercanidipine has long lasting antihypertensive action as well as reno- and neuro-protective effect. Lercanidipine also shows anti-oxidant, anti-inflammatory and anti-apoptotic properties. Lercanidipine can be used in cardiovascular and neurological research.
    Lercanidipine hydrochloride
  • HY-N0408
    Picroside II
    		Inhibitor 99.91%
    Picroside II is an antioxidant with oral activity that can reduce the production of ROS and protect the blood-brain barrier (BBB) after CI/R injury, offering neuroprotective effects. Picroside II has antioxidant, immune-regulating, antiviral properties, and inhibits apoptosis. Picroside II alleviates the inflammatory response in sepsis by suppressing the activation of the NLRP3 inflammasome and NF-κB pathways.
    Picroside II
  • HY-N1404
    Sodium aescinate
    		Inhibitor 99.26%
    Sodium aescinate is a triterpene saponin derived from Aesculus hippocastanum seeds, with anti-inflammatory and antioxidant activities. Sodium aescinate inhibits hepatocellular carcinoma growth by targeting CARMA3/NF-κB pathway.
    Sodium aescinate
  • HY-100581
    CORM-3
    CORM-3, a carbon monoxide-releasing molecule, attenuates NF-κB p65 nuclear translocation, reduces ROS generation and enhances intracellular glutathione and superoxide dismutase levels. CORM-3 reduces NLRP3 inflammasome activation.
    CORM-3
  • HY-B1971
    Deltamethrin
    		99.93%
    Deltamethrin (Decamethrin) is an orally active synthetic pyrethroid insecticide. Deltamethrin induces oxidative stress and results in inflammation and apoptosis via inhibiting Nrf2/HO-1 pathway. Deltamethrin has an anticancer effect by inducing apoptosis. Deltamethrin can be used extensively in pest control.
    Deltamethrin
  • HY-N0668
    Rubusoside
    		Inhibitor 98.58%
    Rubusoside is a diterpene glycoside that is also a sweetener and solubilizer with anti-angiogenic, anti-cancer, anti-obesity, anti-allergic and anti-asthmatic effects. Rubusoside attenuates airway hyperresponsiveness and reduces inflammatory cells in bronchoalveolar lavage fluid (BALF), reducing OVA (HY-W250978)-induced airway inflammation. Rubusoside also prevents palmitic acid-induced lipotoxicity in pancreatic INS-1 cells, reduces the transport of human glucose transporters GLUT-1 and fructose GLUT-5, and inhibits NF-κB and α-amylase (α-amylase).
    Rubusoside
  • HY-110177
    SP-100030
    		Inhibitor 99.86%
    SP-100030 is a potent NF-κB and activator protein-1 (AP-1) double inhibitor (IC50s=50 and 50 nM, respectively). SP-100030 inhibits IL-2, IL-8, and TNF-alpha production in Jurkat and other T cell lines. SP-100030 decreases murine collagen-induced arthritis (CIA).
    SP-100030
  • HY-N0436
    Engeletin
    		Inhibitor 99.88%
    Engeletin is a flavanonol glycoside isolated from Smilax glabra Roxb. , inhibits NF-κB signaling-pathway activation, and possesses anti-inflammatory, analgesic, diuresis, detumescence, and antibiosis effects.
    Engeletin
  • HY-110195
    Smurf1-IN-A01
    		99.81%
    Smurf1-IN-A01 is a Smurf1 inhibitor. Smurf1-IN-A01 has anticancer activity and can be used for the research of osteoporosis and age-related macular degeneration.
    Smurf1-IN-A01
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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