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-N2543
    Damascenone
    Inhibitor 99.39%
    Damascenone ((E/Z)-Damascenone) is an active compound of Epipremnum pinnatum with anti-inflammatory activity. Damascenone is a mixture complex of E-isomer-Damascenone and Z-isomer Damascenone.
    Damascenone
  • HY-W046353
    2-Methoxycinnamaldehyde
    Inhibitor 98.95%
    2-Methoxycinnamaldehyde (o-Methoxycinnamaldehyde) is a natural compound that can be isolated from Cinnamomum cassia. 2-Methoxycinnamaldehyde inhibits topoisomerase-I/II and NF-κB signaling pathway, causes mitochondrial dysfunction, induces lysosomal vesiculation, thereby leading to DNA damage and cell apoptosis. 2-Methoxycinnamaldehyde exhibits antitumor effects.
    2-Methoxycinnamaldehyde
  • HY-N2374
    Eupatorin
    Inhibitor 99.53%
    Eupatorin is an orally active flavonoid with antiproliferative and vasodilatory properties. Eupatorin downregulates the expression levels of NF-κB, MMP9, IL-1β and TNF-α. Eupatorin induces apoptosis, G2/M phase cell cycle arrest, and reactive oxygen species (ROS) production. Eupatorin modulates the activities of muscarinic receptors and β-adrenergic receptors; inhibits sarcoplasmic reticulum calcium release and calcium channels; and activates the NO/sGC/cGMP pathway, indomethacin-sensitive pathway, and potassium channel pathway. Eupatorin exerts cytotoxic effects on cancer cell lines, and is metabolized by CYP1A1 and CYP1 family enzymes to form metabolites with antiproliferative activity. Eupatorin can be used in research related to breast cancer, hypertension, and leukemia.
    Eupatorin
  • HY-N2481
    Oroxylin A-7-O-glucuronide
    Inhibitor 99.83%
    Oroxylin A-7-O-glucuronide (oroxyloside) is an orally active flavonoid glucuronide and metabolite of Oroxylin A (HY-N0560). Oroxylin A-7-O-glucuronide can be extracted from the dried root of Scutellaria baicalensis. Oroxylin A-7-O-glucuronide exhibits prolyl oligopeptidase inhibitory activity. Oroxylin A-7-O-glucuronide inhibits the JNK pathway, upregulates PPARγ, and inhibits NF-κB p65 nuclear translocation. Oroxylin A-7-O-glucuronide reduces cytokine (IL-1β, IL-6) production. Oroxylin A-7-O-glucuronide exhibits anti-angiogenic, anti-tumor (glioma, liver cancer), anti-inflammatory, and hepatoprotective activities.
    Oroxylin A-7-O-glucuronide
  • HY-101318
    β-Funaltrexamine hydrochloride
    Inhibitor 99.07%
    β-Funaltrexamine (β-FNA) hydrochloride is a blood-brain barrier-permeable, selective and irreversible μ-opioid receptor antagonist with immunomodulatory, anti-inflammatory and neuroprotective activities. β-Funaltrexamine hydrochloride inhibits p38 MAPK and TLR4 signaling by blocking μ-opioid receptors, and reduces the transcriptional activities of NF-κB, AP-1, CREB and Stat. Furthermore, β-Funaltrexamine hydrochloride inhibits iNOS activation and pro-inflammatory microglial polarization, converting microglia to an anti-inflammatory phenotype, thereby downregulating neuroinflammation and ameliorating neuronal degeneration. β-Funaltrexamine hydrochloride is widely applicable to research related to stroke, cerebral ischemia/reperfusion injury and neurodegenerative diseases.
    β-Funaltrexamine hydrochloride
  • HY-N5048
    Galloylpaeoniflorin
    Inhibitor 98.30%
    Galloylpaeoniflorin (6'-O-Galloyl paeoniflorin) is an orally active galloylated derivative of Paeoniflorin (HY-N0293) found in peony roots with various anti-inflammatory and antioxidant activities. Galloylpaeoniflorin suppresses RANKL-induced activation of ERK, JNK, c-Fos, c-Jun, and NFATc1, and reduces osteoclast-specific gene expression. Galloylpaeoniflorin activates Nrf2 and PI3K/Akt pathways, inhibits NF-κB activation, and scavenges ROS to reduce oxidative DNA, lipid, and protein damage. Galloylpaeoniflorin attenuates neuroinflammation, inhibits apoptosis, reduces Helicobacter pylori-induced gastric mucosa injury and UVB-induced cell damage. Galloylpaeoniflorin can be used for the research of osteoporosis, gastritis, ischemic stroke and skin diseases.
    Galloylpaeoniflorin
  • HY-W016969
    2-Undecanone
    Inhibitor 99.90%
    2-Undecanone is an orally active organic ketone. 2-Undecanone exerts antibacterial effects by inhibiting bacterial chaperone systems and interfering with the refolding of heat-inactivated proteins. 2-Undecanone also ameliorates asthmatic inflammation and airway remodeling by blocking the NF-κB pathway, and activates the Nrf2 pathway to reduce oxidative damage and prevent lung cancer induced by Benzo[a]pyrene (HY-107377). 2-Undecanone can be used in research related to cancer, asthma and infections.
    2-Undecanone
  • HY-N0705
    Curculigoside
    Inhibitor 99.82%
    Curculigoside is the main saponin in C. orchioide, exerts significant antioxidant, anti-osteoporosis, antidepressant and neuroprotection effects. Curculigoside possesses significant anti-arthritic effects in vivo and in vitro via regulation of the JAK/STAT/NF-κB signaling pathway.
    Curculigoside
  • HY-W031757
    Anthraquinone-2-carboxylic acid
    Inhibitor 98.0%
    Anthraquinone-2-carboxylic acid is an orally active anthraquinone compound and Antibacterial agent. Anthraquinone-2-carboxylic acid can be isolated from Bajitian. Anthraquinone-2-carboxylic acid inhibits the activation of DPP-IV, COX-2, NF-κB and AP-1. Anthraquinone-2-carboxylic acid blocks IAV-induced activation of the RIG-I/STAT1 pathway, alleviates IAV-mediated weight loss, and protects against lethal IAV infection. Anthraquinone-2-carboxylic acid inhibits the growth of various Staphylococcus strains. It possesses potent anti-inflammatory, immunomodulatory, analgesic and antibacterial activities.\n



    Anthraquinone-2-carboxylic acid
  • HY-N7128
    Flavanone
    Inhibitor 99.73%
    Flavanone is a naturally occurring flavone. Flavanone has inhibitory activity for human estrogen synthetase (aromatase). Flavanone is the inhibitor for ERK/p38/NF-κB signaling pathway. Flavanone exhibits oral activity and antitumor efficacy.
    Flavanone
  • HY-N6946
    Mitraphylline
    99.61%
    Mitraphylline is the major pentacyclic oxindolic alkaloid presented in Uncaria tomentosa. Mitraphylline inhibits lipopolysaccharide-mediated activation of primary human neutrophils. Mitraphylline exhibits antiproliferative activity in human glioma and neuroblastoma cell lines. Mitraphylline can inhibit interleukin release in vivo.
    Mitraphylline
  • HY-18739R
    Phorbol 12-myristate 13-acetate (Standard)
    Activator
    Phorbol 12-myristate 13-acetate (PMA; TPA; Phorbol myristate acetate) (Standard) is the analytical standard of Phorbol 12-myristate 13-acetate. This product is intended for research and analytical applications.
    Phorbol 12-myristate 13-acetate (Standard)
  • 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-B1900
    Methylprednisolone succinate
    Inhibitor 99.67%
    Methylprednisolone succinate (Methylprednisolone hydrogen succinate) is a prodrug of Methylprednisolone (HY-B0260) and glucocorticoid with immunosuppressant and anti-inflammatory activity. Methylprednisolone succinate binds cytosolic glucocorticoid receptors, translocates to nuclei, and modulates target gene transcription. Methylprednisolone succinate alters Bax, Bcl-2, occludin, and ZO-1 expression; attenuates TLR4/NF-κB signaling; suppresses proinflammatory cytokine production and immune cell activation. Methylprednisolone succinate can be used for the research of intracranial haemorrhage, rheumatoid arthritis, multiple sclerosis, preterminal cancer, inflammatory conditions, shock, immediate-type hypersensitivity, acute myocardial ischemia, hypoxic heart muscle damage, and traumatic spinal cord injury.
    Methylprednisolone succinate
  • HY-18620
    DZ2002
    Inhibitor 99.83%
    DZ2002 is an orally active, reversible and low-cytotoxic type III SAHH inhibitor (Ki=17.9 nM), with good immunosuppressive activity. DZ2002 prevents the development of experimental dermal fibrosis by reversing the profibrotic phenotype of various cell types. DZ2002 can be used in studies of autoimmune diseases such as lupus syndrome and systemic sclerosis.
    DZ2002
  • HY-N0106
    (Rac)-Salvianic acid A sodium
    Inhibitor 98.0%
    (Rac)-Salvianic acid A sodium is the racemic form of Salvianic acid A (HY-N1913). Salvianic acid A is an orally active phenolic compound that induces Nrf2/HO-1 activation and inhibits the NF-κB pathway, and it also activates the mitochondrial antioxidant defense system (Mitochondrial Metabolism). Salvianic acid A exhibits anti-inflammatory, antioxidant, and anti-apoptotic properties (Apoptosis), demonstrating potential for research into inflammation and cardiovascular diseases.
    (Rac)-Salvianic acid A sodium
  • HY-13010
    Laquinimod
    Inhibitor 99.46%
    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
  • HY-112440
    HZX-02-059
    Inhibitor 99.40%
    HZX-02-059 is a potent methuosis inducer and dual-target PIKfyve/tubulin inhibitor with anticancer activity. Methuosis mainly disrupts the balance of endocytosis and exocytosis, forming a large number of vesicles and inducing cell death. HZX-02-059 also induces cell vacuolization, promotes apoptosis, downregulates the p53 pathway, inhibits PI3K/AKT phosphorylation, and inhibits c-Myc and NF-κB transcription.
    HZX-02-059
  • HY-N4150
    Quercetagitrin
    Inhibitor 98.34%
    Quercetagitrin (Quercetagetin-7-O-glucoside) is a natural product that can be isolated from the African marigold (Tagetes erecta). Quercetagitrin has anti-inflammatory activity. Quercetagitrin inhibits Tau accumulation. Quercetagitrin can reverse neuroinflammation and cognitive deficits in P301S-Tau transgenic mouse model through inhibiting NF-κB activation. Quercetagitrin is a dual-target inhibitor of PTPN6 (IC50 = 1 μM) and PTPN9 (IC50 = 1.7 μM). Quercetagitrin enhances glucose uptake by mature C2C12 myoblasts. Quercetagitrin can be studied in research for Alzheimer’s disease and type 2 diabetes.
    Quercetagitrin
  • HY-N5084
    Pinocembrin 7-O-[3''-O-galloyl-4'',6''-hexahydroxydiphenoyl]-β-D-glucoside
    Inhibitor 98.92%
    Pinocembrin 7-O-[3''-O-galloyl-4'',6''-hexahydroxydiphenoyl]-β-D-glucoside is a TRPV1 antagonist and HDAC7 inhibitor. Pinocembrin 7-O-[3''-O-galloyl-4'',6''-hexahydroxydiphenoyl]-β-D-glucoside blocks TRPV1-mediated calcium influx, suppresses phosphorylation of p65, IκBα, p38, JNK, and ERK1/2, inhibiting NF-κB and MAPK signaling cascades. Pinocembrin 7-O-[3''-O-galloyl-4'',6''-hexahydroxydiphenoyl]-β-D-glucoside reduces production and gene expression of pro-inflammatory cytokines IL-1β, IL-6, and TNF-α. Pinocembrin 7-O-[3''-O-galloyl-4'',6''-hexahydroxydiphenoyl]-β-D-glucoside exhibits potent analgesic activity, elevates thermal pain threshold and mechanical pain threshold in murine models. Pinocembrin 7-O-[3''-O-galloyl-4'',6''-hexahydroxydiphenoyl]-β-D-glucoside restores CD8+ T cell infiltration into bladder cancer tumors and improves bladder cancer immunotherapy efficacy. Pinocembrin 7-O-[3''-O-galloyl-4'',6''-hexahydroxydiphenoyl]-β-D-glucoside can be used for the researches of painand bladder cancer.
    Pinocembrin 7-O-[3''-O-galloyl-4'',6''-hexahydroxydiphenoyl]-β-D-glucoside
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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