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-113772
    Inflachromene
    		Inhibitor 99.88%
    Inflachromene, a microglial inhibitor, binds to HMGB1 and HMGB2 and exerts anti-inflammatory effects. Inflachromene effectively downregulates proinflammatory functions of HMGB and reduces neuronal damage. Inflachromene can be used for the research of neuroinflammatory disorders.
    Inflachromene
  • HY-N0387
    Rhynchophylline
    		Inhibitor 99.94%
    Rhyncholphylline is an alkaloid compound isolated from Uncaria rhynchophyllum. Rhyncholphylline is an EphA4 inhibitor. It has high biological activity and is widely used in anti-inflammatory, neuroprotective and other research..
    Rhynchophylline
  • HY-D0939
    Direct Blue 1
    		Inhibitor
    Direct Blue 1 (Chicago Sky Blue 6B) is a complex dye for background autofluorescence in immunofluorescence histochemistry. Direct Blue 1 is a potent and competitive VGLUT inhibitor. Direct Blue 1 can inhibit the Aβ-binding small molecule PrP ligand. Direct Blue 1 has anti-inflammatory activity.
    Direct Blue 1
  • HY-N0017
    Bergenin
    		99.21%
    Bergenin is a cytoprotective and antioxidative polyphenol found in many medicinal plants. Bergenin has a wide spectrum activities such as hepatoprotective, antiinflammatory, immunomodulatory, antitumor, antiviral, and antifungal properties.
    Bergenin
  • HY-108694
    γ-Tocotrienol
    		Inhibitor 99.73%
    γ-Tocotrienol is an active form of vitamin E. γ-tocotrienol reverses the multidrug resistance (MDR) of breast cancer cells through the signaling pathway of NF-κB and P-gp. γ-Tocotrienol is also a novel radioprotector agent, can mitigate bone marrow radiation damage during targeted radionuclide treatment.
    γ-Tocotrienol
  • HY-N0474
    Tyrosol
    		Inhibitor 99.98%
    Tyrosol is a derivative of phenethyl alcohol. Tyrosol attenuates pro-inflammatory cytokines from cultured astrocytes and NF-κB activation. Anti-oxidative and anti-inflammatory effects.
    Tyrosol
  • HY-110247
    TRAF-STOP inhibitor 6877002
    		Inhibitor 99.67%
    TRAF-STOP inhibitor 6877002 is a selective CD40-TRAF6 interaction inhibitor. TRAF-STOP inhibitor 6877002 exerts anti-atherosclerotic activity by blocking the CD40-TRAF6 signaling pathway, inhibiting classical monocyte activation, leukocyte recruitment, and macrophage activation and migration. TRAF-STOP inhibitor 6877002 reduces the phosphorylation levels of signaling intermediates in the canonical NF-κB pathway.
    TRAF-STOP inhibitor 6877002
  • 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-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-N6673
    Okanin
    		Inhibitor 99.98%
    Okanin, effective constituent of the flower tea Coreopsis tinctoria, attenuates LPS-induced microglial activation through inhibition of the TLR4/NF-κB signaling pathways.
    Okanin
  • HY-B1899
    Taurodeoxycholic acid
    		Inhibitor ≥98.0%
    Taurodeoxycholate sodium salt is a bile salt-related anionic detergent. Taurodeoxycholic acid is formed in the liver by conjugation of deoxycholate with Taurine (HY-B0351). Taurodeoxycholic acid is used for isolation of membrane proteins including inner mitochondrial membrane proteins. Taurodeoxycholic acid (TDCA) exhibits anti-inflammatory and neuroprotective effects.
    Taurodeoxycholic acid
  • 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-D0205A
    Carbocisteine
    		Inhibitor ≥98.0%
    Carbocisteine is an orally active mucolytic agent. Carbocisteine attenuates the phosphorylation of NF-κB p65 and ERK1/2. Carbocisteine modulates Nrf2/HO-1 and NFκB interplay. Carbocisteine inhibits Apoptosis. Carbocisteine is used in chronic obstructive pulmonary disease (COPD) research.
    Carbocisteine
  • HY-12220
    MM-102
    		Inhibitor 99.39%
    MM-102 (HMTase Inhibitor IX) is a cell-permeable and tightly binding inhibitor of MLL1-WDR5 interaction (IC50=2.4 nM). MM-102 can specifically inhibit the growth and induce apoptosis of leukemia cells containing MLL1 fusion protein, and reduce renal fibrosis and inflammation in mice with ischemia-reperfusion injury. In addition, MM-102 also acts as an H3K4 histone methyltransferase inhibitor to improve the development of porcine somatic cell nuclear transfer (SCNT) embryos.
    MM-102
  • HY-N0043
    Ginsenoside Rd
    		Inhibitor 99.88%
    Ginsenoside Rd inhibits TNFα-induced NF-κB transcriptional activity with an IC50 of 12.05±0.82 μM in HepG2 cells. Ginsenoside Rd inhibits expression of COX-2 and iNOS mRNA. Ginsenoside Rd also inhibits Ca2+ influx. Ginsenoside Rd inhibits CYP2D6, CYP1A2, CYP3A4, and CYP2C9, with IC50s of 58.0±4.5 μM, 78.4±5.3 μM, 81.7±2.6 μM, and 85.1±9.1 μM, respectively.
    Ginsenoside Rd
  • 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-100594
    EUK-134
    		Inhibitor 98.27%
    EUK-134, a synthetic superoxide dismutase and catalase mimetic, protects rat kidneys from ischemia-reperfusion-induced damage. EUK-134 is a superoxide dismutase (SOD) mimetics (SODm) with catalase activity. EUK-134 is a mitoprotective antioxidant. EUK-134 reduces the expression of NF-κB, MDA level, and protein carbonylation in H9C2 cells.
    EUK-134
  • HY-126741
    Azadirachtin
    		Inhibitor 99.06%
    Azadirachtin is an oral active triterpenoid compound with anticancer, antimalarial, anti-inflammatory, and insecticidal activities. Azadirachtin induces cell apoptosis through the mitochondrial pathway (by inhibiting Bcl-2/Bax ratio or activating Apaf-1 and caspase-3) or through death receptors (by inhibiting TNFR activation). Additionally, Azadirachtin exerts its anti-inflammatory effects by inhibiting NF-кB signaling pathway activation, and it exhibits insecticidal activity by inducing apoptosis in insect cells.
    Azadirachtin
  • HY-N0103
    Sophocarpine
    		Inhibitor 98.63%
    Sophocarpine is a PTEN activator and an inhibitor of PI3K/Akt, MEK/ERK, and NF-κB signaling pathways. Sophocarpine upregulates PTEN expression and inhibits PI3K/Akt phosphorylation, arrests tumor cell cycle and induces apoptosis. Sophocarpine inhibits MEK/ERK phosphorylation and VEGF secretion, reducing tumor cell migration. Sophocarpine can also inhibit NF-κB activation and p38 and JNK phosphorylation, reduce the expression of inflammatory factors such as iNOS and COX-2, and activate the Nrf2/HO-1 pathway to reduce oxidative stress. Sophocarpine has anti-tumor, anti-inflammatory, antioxidant and anti-apoptotic effects, and can be used in the research of cancers such as glioblastoma and colorectal cancer, inflammation-related diseases, and Doxorubicin (HY-15142A)-induced cardiac damage.
    Sophocarpine
  • HY-N0213
    Peiminine
    		99.94%
    Peiminine is a compound that can be isolated from Bolbostemma paniculatum (Maxim) Franquet (Cucurbitaceae family). Peiminine can induce apoptosis in human hepatocellular carcinoma HepG2 cells through both extrinsic and intrinsic apoptotic pathways. Peiminine has anti-inflammatory, anticancer, anti-osteoporosis, cardioprotective and other activities in many animal models.
    Peiminine
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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