1. Signaling Pathways
  2. NF-κB
  3. NF-κB

NF-κB

Nuclear factor-κB; Nuclear factor-kappaB

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.

Cat. No. Product Name Effect Purity Chemical Structure
  • HY-N1500R
    Pulegone (Standard)
    Inhibitor
    Pulegone (Standard) is the analytical standard of Pulegone (HY-N1500). This product is intended for research and analytical applications. Pulegone is a monoterpene ketone compound widely present in the essential oils of many plants. Pulegone can also be used as a bird repellent. Pulegone has multiple activities such as anti-inflammatory, antibacterial, antifungal, and anti-hyperalgesic effects. Pulegone is particularly effective against bacteria of the Salmonella species.
    Pulegone (Standard)
  • HY-B1773AS1
    Sodium propionate-13C-1
    Inhibitor
    Sodium propionate-13C-1 is the 13C-labeled Propionate sodium (HY-B1773A). Sodium propionate is an orally active short-chain fatty acid. Sodium propionate can be produced by intestinal bacteria from the metabolism of dietary fiber. Sodium propionate increases PPAR-γ, inhibits NF-κB activation, and reduces COX-2 expression and NO production. Sodium propionate also induces Apoptosis and Autophagy. Sodium propionate reduces HSV-1-induced keratitis. Sodium propionate has anticancer effects against glioblastoma. Sodium propionate exhibits neuroprotective, antioxidant, and anti-inflammatory activities. Sodium propionate can be used in the research of spinal cord injury and Alzheimer's disease.
    Sodium propionate-<sup>13</sup>C-1
  • HY-121893
    p53-MDM2-IN-3
    Inhibitor
    p53-MDM2-IN-3 (Compound 5s) is an orally active p53-MDM2 inhibitor with a Ki value of 0.25 μM. p53-MDM2-IN-3 exerts antitumor activity by inhibiting NF-κB pathway.
    p53-MDM2-IN-3
  • HY-Y0586R
    2,4,5-Trimethoxybenzoic acid (Standard)
    Inhibitor
    2,4,5-Trimethoxybenzoic acid (Standard) is the analytical standard of 2,4,5-Trimethoxybenzoic acid (HY-Y0586). This product is intended for research and analytical applications. 2,4,5-Trimethoxybenzoic acid (Asaronic acid) is a compound identified in purple perilla extracts. 2,4,5-Trimethoxybenzoic acid inhibits LPS (HY-D1056)-induced inflammatory responses, inhibits the activation of NF-κB and STAT signaling pathways. 2,4,5-Trimethoxybenzoic acid inhibits M1 macrophage phenotype-mediated inflammation in diabetes.
    2,4,5-Trimethoxybenzoic acid (Standard)
  • HY-126047
    (S)-(-)-Anatabine
    Inhibitor
    (S)-(-)-Anatabine is an NFκB/BACE-1 inhibitor with blood-brain barrier penetration. (S)-(-)-Anatabine inhibits NFκB activation via phosphorylation of its p65 subunit. (S)-(-)-Anatabine inhibits BACE-1 transcription and reduces BACE-1 protein levels. (S)-(-)-Anatabine lowers production of 1-40 and 1-42 by reducing β-cleavage of amyloid precursor protein without affecting α-cleavage. (S)-(-)-Anatabine can be used for the research of Alzheimer's disease.
    (S)-(-)-Anatabine
  • HY-130073
    Amorfrutin A
    Inhibitor
    Amorfrutin A is the inhibition of NF-κB activation, that inhibits TNF-α-induced IκBα degradation, p65 nuclear translocation, and DNA-binding activity. Amorfrutin A promotes TNF-α-induced apoptosis in HeLa cell through promotion of caspase-3 and PARP proteolysis.
    Amorfrutin A
  • HY-120657S
    9-PAHSA-d4
    Inhibitor
    9-PAHSA-d4 is the deuterium labeled 9-PAHSA. 9-PAHSA is an orally active endogenous GPR120 agonist (EC50=18 μM). 9-PAHSA significantly inhibits LPS-induced inflammatory responses by blocking the NF-κB pathway. 9-PAHSA induces adipocyte browning, enhances glucose uptake and reduces lipid accumulation, while improving mitochondrial function and the survival rate of steatotic hepatocytes. In terms of neuroprotection, 9-PAHSA regulates the expression of REST and BDNF in the prefrontal cortex of diabetic mice, and effectively prevents spatial working memory deficits and abnormal social behaviors. 9-PAHSA does not directly regulate insulin secretion or improve systemic insulin sensitivity, and possesses specific anti-inflammatory, metabolic regulatory and neuroprotective properties. 9-PAHSA can be used in the research of diabetes-related cognitive impairment, obesity and non-alcoholic fatty liver disease.
    9-PAHSA-d<sub>4</sub>
  • HY-N2450R
    Sulforaphene (Standard)
    Inhibitor
    Sulforaphene, isolated from radish seeds, exhibits an ED50 against velvetleaf seedlings approximately 2 x 10-4 M. Sulforaphene promotes cancer cells apoptosis and inhibits migration via inhibiting EGFR, p-ERK1/2, NF‐κB and other signals.
    Sulforaphene (Standard)
  • HY-113402B
    Gamma-glutamylcysteine ammonium
    Inhibitor
    Gamma-glutamylcysteine ammonium (γ-Glu-Cys ammonium) is an orally active, blood-brain barrier permeable dipeptide. Gamma-glutamylcysteine ammonium activates AMPK, SIRT1, IL-4/STAT6, AC/cAMP/PI3K, IGF-1R/IRS1/PI3K, and Nrf2 signaling pathways; it inhibits NF-κB, JAK1/STAT1/3, MAPKs, cadmium-induced p38 MAPK, JNK, and PI3K/Akt signaling pathways. Gamma-glutamylcysteine ammonium regulates macrophage polarization, modulates the trafficking of CD36 and GLUT4, induces glutathione synthesis, improves metabolic dysfunction, reduces lipid deposition, ameliorates glucose homeostasis, inhibits apoptosis (Apoptosis), stabilizes mitochondria, suppresses lipid peroxidation, iron accumulation and ferroptosis (Ferroptosis), reduces ds-HMGB1 levels, reverses mechanical hyperalgesia, and alleviates hepatic lipid droplet formation. Gamma-glutamylcysteine ammonium is applicable to research related to inflammatory bowel disease, type 2 diabetes, cadmium-induced neurotoxicity, Alzheimer's disease, cerebral ischemia/reperfusion injury, neuropathy, and alcoholic liver disease.
    Gamma-glutamylcysteine ammonium
  • HY-N0847R
    Micheliolide (Standard)
    Inhibitor
    Micheliolide is a sesquiterpene lactone with anti-cancer and anti-inflammatory effects, which is derived from Michelia compressa and Michelia champaca. Micheliolide can attenuate high glucose-stimulated NF-κB activation, IκBα degradation, and the expression of MCP-1, TGF-β1, and FN in mouse mesangial cells. Micheliolide inhibits LPS (HY-D1056)-induced activation of NF-κB and PI3K/Akt/p70S6K pathways to play an anti-inflammatory role. Micheliolide inhibits dextran sodium sulphate (DSS) (HY-116282)-induced inflammatory intestinal disease, colitis-associated cancer and rheumatic arthritis.
    Micheliolide (Standard)
  • HY-160187A
    (Rac)-AAA
    Inhibitor 99.02%
    (Rac)-AAA is a regulator and inhibitor targeting GPR75. By blocking the 20-HETE-induced downregulation of GPR75 expression, (Rac)-AAA effectively inhibits the activation of key downstream signaling pathways including EGFR, AKT, NF-κB and FAK. (Rac)-AAA reverses 20-HETE-mediated epithelial-mesenchymal transition, which is specifically characterized by downregulating vimentin (vimentin), upregulating E-Cadherin, as well as reducing MMP-2 activity and cancer cell migration ability. (Rac)-AAA also abolishes the 20-HETE-induced upregulation of HIC-5 expression and anchorage-independent growth, and modulates the subcellular localization of PKC-α and phosphorylated AKT. (Rac)-AAA is investigated in androgen-independent prostate cancer (castration-resistant prostate cancer).
    (Rac)-AAA
  • HY-14645B
    DHMEQ racemate
    Inhibitor
    DHMEQ racemate is a NF-κB inhibitor. DHMEQ racemate is less active than (-)-DHMEQ.
    DHMEQ racemate
  • HY-N0267R
    Hypaconitine (Standard)
    Inhibitor
    Hypaconitine (Standard) is the analytical standard of Hypaconitine. This product is intended for research and analytical applications. Hypaconitine inhibits the KCNH2 current with an IC50 of 8.1 nM, and exhibits cardiotoxicity. Hypaconitine inhibits TGF-β1-induced epithelial-mesenchymal transition (EMT) in A549 cell through the inhibition of NF-κB nuclear translocation. Hypaconitine acts as the neuromuscular blocker. Hypaconitine is orally active.
    Hypaconitine (Standard)
  • HY-N6857R
    Armepavine (Standard)
    Inhibitor
    Armepavine (Standard) is the analytical standard of Armepavine. This product is intended for research and analytical applications. Armepavine, an active compound from Nelumbo nucifera, exerts not only anti-inflammatory effects on human peripheral blood mononuclear cells, but also immunosuppressive effects on T lymphocytes and on lupus nephritic mice. Armepavine inhibits TNF-α-induced MAPK and NF-κB signaling cascades.
    Armepavine (Standard)
  • HY-107566A
    Conessine dihydrobromide
    Inhibitor
    Conessine dihydrobromide is an orally active and BBB-penetrable selective histamine H3 receptor antagonist. The pKi values of Conessine dihydrobromide for rat and human H3 receptors are 7.61 and 8.27, respectively. Conessine dihydrobromide is an inhibitor of the multidrug efflux pump system in Pseudomonas aeruginosa and can enhance the activity of antibiotics. Conessine dihydrobromide has antimalarial activity. Conessine dihydrobromide can also be used in the research of muscle atrophy.
    Conessine dihydrobromide
  • HY-119420
    Acetoxycycloheximide
    Inhibitor
    Acetoxycycloheximide is an antibiotic with antitumor activity. Acetoxycycloheximide a protein synthesis inhibitor. Acetoxycycloheximide significantly induces activation of procaspase-3 and subsequent apoptosis mediated by the Cytochrome c from mitochondria via activation of JNK pathway. Acetoxycycloheximide triggers the downregulation of cell surface TNF-R1 via the activation of ERK and p38 MAPK, thereby preventing activation of the NF-κB signaling pathway by TNF-α. Acetoxycycloheximide is much more toxic to female rats than to males. Acetoxycycloheximide can be used for inflammatory and immune diseases and cancers research.
    Acetoxycycloheximide
  • HY-N0668R
    Rubusoside (Standard)
    Inhibitor
    Rubusoside (Standard) is the analytical standard of Rubusoside. This product is intended for research and analytical applications. 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 (Standard)
  • HY-13010R
    Laquinimod (Standard)
    Inhibitor
    Laquinimod (Standard) is the analytical standard of Laquinimod. This product is intended for research and analytical applications. Laquinimod (ABR-215062), an orally available carboxamide derivative, is a potent immunomodulator which 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 (Standard)
  • HY-N2119R
    Sciadopitysin (Standard)
    Inhibitor
    Sciadopitysin (Standard) is the analytical standard of Sciadopitysin. This product is intended for research and analytical applications. Sciadopitysin is a type of biflavonoids in leaves from ginkgo biloba. Sciadopitysi inhibits RANKL-induced osteoclastogenesis and bone loss by inhibiting NF-κB activation and reducing the expression of c-Fos and NFATc1.
    Sciadopitysin (Standard)
  • HY-N1159
    Teuclatriol
    Inhibitor
    Teuclatriol is an NF-κB inhibitor can be isolated from salvia mirzayanii, has anti-inflammatory effects. Teuclatriol inhibits TNF-α secretion in a dose-dependent manner.
    Teuclatriol
Cat. No. Product Name / Synonyms Application Reactivity

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.

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