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-N0803
    Myrcene
    Inhibitor
    Myrcene (β-Myrcene) is a type of aromatic compound that inhibits TNFα and NF-κB activity. Myrcene has anti-invasive action, inhibits cell cycle, and leads to cancer cell apoptosis. Myrcene has strong blood protection effect, anti-inflammation, and anti-inflammatory activity.
    Myrcene
  • HY-N1500
    Pulegone
    Inhibitor 98.80%
    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
  • HY-W229874
    EN106
    Inhibitor 99.92%
    EN106 is a potent inhibitor of FEMIB. EN106 is a cysteine-reactive covalent ligand. EN106 disrupts recognition of the key reductive stress substrate of FEM1B, FNIP1. EN106 reduces oxidative stress and rescues high glucose-induced impaired angiogenesis in HUVECs.
    EN106
  • HY-W006957
    N6-(2-Hydroxyethyl)adenosine
    Inhibitor 99.85%
    N6-(2-Hydroxyethyl)adenosine is a purine nucleoside analog. N6-(2-Hydroxyethyl)adenosine inhibits NF-κB/Smad signaling pathway, exhibits anti-hyperglycemia, antioxidant, antitumor and anti-inflammatory and insecticidal activities. N6-(2-Hydroxyethyl)adenosine is orally active.
    N6-(2-Hydroxyethyl)adenosine
  • HY-N6263
    EGCG Octaacetate
    Inhibitor 98.42%
    EGCG Octaacetate (AcEGCG) is a proagent of Green tea epigallocatechin-3-gallate (EGCG). EGCG Octaacetate decreases the proinflammatory mediator levels by down-regulating of PI3K/Akt/NFκB phosphorylation and p65 acetylation. EGCG octaacetate is the potential antibacterial compound for gram-positive bacteria (GPB) and gram-negative bacteria (GNB). EGCG Octaacetate exhibits antioxidant, anti-angiogenesis, anti-inflammatory and antitumor activities.
    EGCG Octaacetate
  • HY-B0612
    Lercanidipine
    Inhibitor 99.65%
    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
  • HY-N1356
    Reticuline
    Inhibitor 98.91%
    Reticuline shows anti-inflammatory effects through JAK2/STAT3 and NF-κB signaling pathways. Reticuline inhibits mRNA expressions of TNF-α, and IL-6 and reduces the phosphorylation levels of JAK2 and STAT3. Reticuline exhibits cardiovascular effects.
    Reticuline
  • HY-N0103A
    Sophocarpine monohydrate
    Inhibitor 99.91%
    Sophocarpine monohydrate is a PTEN activator and an inhibitor of PI3K/Akt, MEK/ERK, and NF-κB signaling pathways. Sophocarpine monohydrate upregulates PTEN expression and inhibits PI3K/Akt phosphorylation, arrests tumor cell cycle and induces apoptosis. Sophocarpine monohydrate inhibits MEK/ERK phosphorylation and VEGF secretion, reducing tumor cell migration. Sophocarpine monohydrate 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 monohydrate 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 monohydrate
  • HY-N4225
    Aaptamine
    Activator 99.71%
    Aaptamine is an alkaloid that can be isolated from the sponge Aaptos suberitoides. Aaptamine is a competitive antagonist of the α-adrenergic receptor, as well as an inhibitor of the proteasome and cholinesterase. Aaptamine is cytotoxic to tumor cells and can induce apoptosis, cell cycle arrest of tumor cells, and the expression of p21 through a p53-independent pathway. Aaptamine has multiple activities such as anti-tumor, antioxidant, antibacterial, and analgesic effects.
    Aaptamine
  • HY-10704
    PTP1B-IN-1
    Inhibitor 99.65%
    PTP1B-IN-1 (Compound 7a) is a small molecule inhibitor of PTP1B with an IC50 value of 1.6 mM. It is often used as the mother core for derivatives of analogues.
    PTP1B-IN-1
  • HY-N2083
    Handelin
    Inhibitor 99.44%
    Handelin is a guaianolide dimer from Chrysanthemum boreale that has potent anti-inflammatory activity by down-regulating NF-κB signaling and pro-inflammatory cytokine production.
    Handelin
  • HY-N4247
    Kuwanon G
    Inhibitor 99.52%
    Kuwanon G is a flavonoid compound and an antagonist of the bombesin receptor. Kuwanon G has multiple activities such as bactericidal, anti-tumor, anti-inflammatory, antioxidant, anti-atherosclerotic, and neuroprotective effects. Kuwanon G exhibits strong antibacterial activity against oral pathogens, especially cariogenic bacteria and periodontal pathogens. Kuwanon G can induce apoptosis and inhibit proliferation, migration, and invasion of tumor cells. Kuwanon G can be used in the research of diseases such as gastric cancer and atherosclerosis.
    Kuwanon G
  • HY-119459
    Fluopyram
    Activator 99.33%
    Fluopyram is an orally active succinate dehydrogenase inhibitor, antifungal and nematicide. Fluopyram inhibits succinate dehydrogenase activity, activates CAR/PXR nuclear receptors, and increases caspase-3, TNF-α and NF-κB. Fluopyram inhibits the growth of F. virguliforme, Botrytis cinerea and Alternaria solani with EC50 values of 3.35, 5.389 and 0.244 µg/mL, respectively. Fluopyram induces liver and thyroid tumor formation. Fluopyram is nephrotoxic and embryotoxic.
    Fluopyram
  • 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-N6246
    Asperulosidic Acid
    Inhibitor 99.72%
    Asperulosidic Acid (ASPA), a bioactive iridoid glycoside, is extracted from the herbs of Hedyotis diffusa Willd. Asperulosidic Acid (ASPA) has anti-tumor, anti-oxidant, and anti-inflammatory activities. ASPA is related to the inhibition of inflammatory cytokines (TNF-α, IL-6) and mediators via suppression of the NF-κB and mitogen-activated protein kinase (MAPK) signaling pathways.
    Asperulosidic Acid
  • HY-N2450
    Sulforaphene
    Inhibitor 99.80%
    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
  • HY-N6843
    Arnicolide D
    Inhibitor 99.69%
    Arnicolide D is a sesquiterpene lactone that can be isolated from Centipeda minima. Arnicolide D is cytotoxic to tumor cells and can induce cell cycle arrest, apoptosis, and oncosis in tumor cells. Arnicolide D has anti-tumor activity.
    Arnicolide D
  • HY-N0277
    Aconine
    Inhibitor 99.78%
    Aconine inhibits receptor activator of nuclear factor (NF)-κB ligand (RANKL)-induced NF-κB activation.
    Aconine
  • HY-N2497
    Isoliquiritin apioside
    Inhibitor 99.87%
    Isoliquiritin apioside significantly decreases PMA-induced increases in MMP9 activities and suppresses PMA-induced activation of MAPK and NF-κB. Isoliquiritin apioside auppresseses invasiveness and angiogenesis of cancer cells and endothelial cells.
    Isoliquiritin apioside
  • HY-N6636
    Valencene
    Inhibitor
    Valencene is a sesquiterpene isolated from Cyperus rotundus, possesses antiallergic, antimelanogenesis, anti-infammatory, and antioxidant activitivies. Valencene inhibits the exaggerated expression of Th2 chemokines and proinflammatory chemokines through blockade of the NF-κB pathway. Valencene is used to flavor foods and drinks.
    Valencene
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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