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-14654S1
    Aspirin-d4
    		Inhibitor 98.08%
    Aspirin-d4 is the deuterium labeled Aspirin (HY-14654). Aspirin (Acetylsalicylic acid) is an orally active, potent and irreversible inhibitor of cyclooxygenase COX-1 and COX-2, with IC50 values of 5 and 210 μg/mL, respectively. Aspirin induces apoptosis. Aspirin inhibits the activation of NF-κB. Aspirin also inhibits platelet prostaglandin synthetase, and can prevent coronary artery and cerebrovascular thrombosis.
    Aspirin-d<sub>4</sub>
  • HY-N0208
    Kaempferol-3-O-glucorhamnoside
    		Inhibitor 99.64%
    Kaempferol-3-O-glucorhamnoside, a flavonoid derived from plant Thesium chinense Turcz, inhibits inflammatory responses via MAPK and NF-κB pathways in vitro and in vivo.
    Kaempferol-3-O-glucorhamnoside
  • HY-N1380R
    Guaiacol (Standard)
    		Inhibitor
    Guaiacol (Standard) is the analytical standard of Guaiacol. This product is intended for research and analytical applications. Guaiacol, a phenolic compound, inhibits LPS-stimulated COX-2 expression and NF-κB activation. Anti-inflammatory activity.
    Guaiacol (Standard)
  • HY-N1914R
    Ergothioneine (Standard)
    		Inhibitor
    Delphinidin-3-O-galactoside (chloride) (Standard) is the analytical standard of Delphinidin-3-O-galactoside (chloride). This product is intended for research and analytical applications. Delphinidin-3-O-galactoside (chloride) is an anthocyanin that extracts from wheat flour. Delphinidin-3-O-galactoside (chloride) can be used for the research of antioxidant and antimicrobial.
    Ergothioneine (Standard)
  • HY-P1860A
    TNF-α (31-45), human TFA
    		Activator
    TNF-α (31-45), human TFA is a potent NF-kB pathway activator. TNF-αis a proinflammatory cytokine that induces necrosis or apoptosis. TNF alpha stimulates NF-κB pathway via TNFR2 promotes cancer growth, invasion, and metastasis.
    TNF-α (31-45), human TFA
  • HY-111954
    (+)-Erinacin A
    		99.97%
    (+)-Erinacin A (Erinacine A) is a cyanoditerpenoid isolated from Hericium erinaceus with anticancer, anti-inflammatory and neuroprotective activities. (+)-Erinacin A can induce cancer cell death by activating extrinsic and intrinsic apoptosis pathways. (+)-Erinacin A can also inhibit the expression of NO synthase (iNOS) and the production of nitrotyrosine to exert inflammatory and neuroprotective effects, thereby reducing ischemic brain damage.
    (+)-Erinacin A
  • HY-106449
    Recoflavone
    		Inhibitor ≥98.0%
    Recoflavone (DA-6034 (free acid)), a synthetic derivative of the flavonoid Eupatilin (HY-N0783), is orally active. Recoflavone can inhibit the NF-κB pathway and induce [Ca(2+)]i increase in epithelial cells. Recoflavone exhibits activities such as anti-inflammation, anti-tumor effects, protection of gastric and intestinal mucosa, and promotion of secretion in the ocular surface and salivary glands. Recoflavone can be used for the research of diseases such as dry eye, gastric injury, and intestinal injury.
    Recoflavone
  • 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-N2106
    Dehydroevodiamine
    		99.93%
    Dehydroevodiamine is a major bioactive quinazoline alkaloid isolated from Evodiae Fructus, has an antiarrhythmic effect in guinea-pig ventricular myocytes. Dehydroevodiamine inhibits LPS-induced iNOS, COX-2, prostaglandin E2 (PGE2) and nuclear factor-kappa B (NF-κB) expression in murine macrophage cells.
    Dehydroevodiamine
  • HY-B2123R
    Lactose (Standard)
    		Inhibitor
    Lactose (Standard) is the analytical standard of Lactose. This product is intended for research and analytical applications. Lactose is a β-galactoside consisting of galactose and glucose residues, the main carbohydrate in mammalian breast milk. Lactose, a macronutrient and an inducer of host innate immune responses, possesses immune modulatory functions.
    Lactose (Standard)
  • HY-13010S
    Laquinimod-d5
    		Inhibitor 98.25%
    Laquinimod-d5 (ABR-215062-d5) is deuterium labeled Laquinimod. Laquinimod (ABR-215062), an orally available carboxamide derivative, is a potent immunomodulator that prevents neurodegeneration and inflammation in the central nervous system. Laquinimod reduces astrocytic NF-κB activation to protect from Cuprizone-induced demyelination. Laquinimod has the potential for relapsing-remitting (RR) and chronic progressive (CP) forms of multiple sclerosis (MS; RRMS or CPMS) as well as neurodegenerative diseases research.
    Laquinimod-d<sub>5</sub>
  • HY-N10303
    Withangulatin A
    		Inhibitor 99.76%
    Withangulatin A is the inhibitor for COX-2. Withangulatin A inhibits MAPK, NF-κB, Akt/mTOR/p70S6K pathway, exhibits antitumor, anti-inflammatory and trypanocidal activities.
    Withangulatin A
  • HY-W011474R
    Geranylgeraniol (Standard)
    		Inhibitor
    Geranylgeraniol (Standard) is the analytical standard of Geranylgeraniol. This product is intended for research and analytical applications. Geranylgeraniol is an orally acitve vitamin K2 sub-type, an intermediate of the mevalonate pathway. Geranylgeraniol targets NF-kB signaling pathway and could alleviate LPS-induced microglial inflammation in animal model[4].
    Geranylgeraniol (Standard)
  • HY-122949
    Momordicine I
    		Inhibitor
    Momordicine I is a cucurbitane-type triterpenoids. Momordicine I suppresses glioma growth by promoting apoptosis and impairing mitochondrial oxidative phosphorylation. Momordicine I inhibits glycolysis, lipid metabolism, induces autophagy in HNC cells to suppress head and neck cancer growth. Momordicine I alleviates isoproterenol-induced cardiomyocyte hypertrophy through suppression of PLA2G6 and DGK-ζ. Momordicine I exerts its cardiovascular benefits by upregulating nitric oxide, inhibiting the activity of angiotensin-converting enzyme (ACE), activating the PI3K/Akt pathway, reducing oxidative stress and inflammation. Momordicine I inhibits AKT1, IL-6, and SRC, suggesting its potential application in type 2 diabetes.
    Momordicine I
  • HY-N0708R
    Vanillic acid (Standard)
    		Inhibitor
    Vanillic acid (Standard) is the analytical standard of Vanillic acid. This product is intended for research and analytical applications. Vanillic acid is a flavoring agent found in edible plants and fruits, also found in Angelica sinensis. Vanillic acid inhibits NF-κB activation. Anti-inflammatory, antibacterial, and chemopreventive effects.
    Vanillic acid (Standard)
  • HY-W005130
    2,4,6-Trihydroxybenzaldehyde
    		Inhibitor 99.93%
    2,4,6-Trihydroxybenzaldehyde is an orally active NF- B inhibitor. 2,4,6-Trihydroxybenzaldehyde shows anti-tumor activity, anti-cancer cell proliferative activity and anti-obesity activity.
    2,4,6-Trihydroxybenzaldehyde
  • HY-19918A
    Anatabine dicitrate
    		Inhibitor 99.03%
    Anatabine dicitrate is a tobacco alkaloid that can cross the blood-brain barrier. Anatabine dicitrate is a potent α4β2 nAChR agonist. Anatabine dicitrate inhibits NF-κB activation lower amyloid-β (Aβ) production by preventing the β-cleavage of amyloid precursor protein (APP). Anatabine dicitrate has anti-inflammatory effects and has the potential for neurodegenerative disorders treatment.
    Anatabine dicitrate
  • HY-B0190
    Nafamostat
    Nafamostat, an anticoagulant, is a synthetic serine protease inhibitor. Nafamostat has anticancer and antivirus effect. Nafamostat induce apoptosis by up-regulating the expression of tumor necrosis factor receptor-1 (TNFR1). Nafamostat can be used in the development of the pathological thickening of the arterial wall.
    Nafamostat
  • HY-P3211
    Nangibotide
    		Inhibitor 98.27%
    Nangibotide (LR12) is a synthetic peptide and TREM-1 receptor inhibitor. Nangibotide inhibits NF-κB and NLRP3 inflammasome activation and reduces the release of pro-inflammatory factors (such as IL-1β, IL-8). Nangibotide inhibits Apoptosis. Nangibotide reduces excessive inflammatory responses and protects tissues (liver, lung) from damage. Nangibotide can be used in the researches for myocardial ischemia-reperfusion injury, septic shock, acute lung injury, osteoarthritis, and acute liver failure.
    Nangibotide
  • HY-135702
    UBS109
    		Inhibitor 99.20%
    UBS109, as a curcumin analogue, can promote the differentiation and mineralization of osteoblasts. UBS109 shows to regulate bone cell function by activating Smad and inhibiting NF-kB. UBS109 can be used in bone tissue engineering and osteoporosis research.
    UBS109
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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