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-139567
    Afimetoran
    		Inhibitor 99.37%
    Afimetoran (BMS-986256) is an orally active, selective, and highly bioavailable TLR7/8 antagonist. Afimetoran (BMS-986256) can inhibit TLR7/8 activation of the NF-κB pathway and reverse TLR7 mediated resistance to steroid induced apoptosis in plasma cell like dendritic cells (pDCs). Afimetoran (BMS-986256) can be used for research on inflammation and autoimmune diseases (systemic lupus erythematosus).
    Afimetoran
  • HY-134476
    NF-κΒ activator 1
    		Activator 99.59%
    NF-κΒ activator 1 (compound 32) is a potent NF-κΒ activator with an EC50 of 0.9 μM. NF-κΒ activator 1 induces superoxide dismutase (SOD)2 mRNA expression.
    NF-κΒ activator 1
  • HY-N0492
    α-Lipoic Acid
    		Inhibitor 99.94%
    α-Lipoic Acid (Thioctic acid) is an antioxidant, which is an essential cofactor of mitochondrial enzyme complexes. α-Lipoic Acid inhibits NF-κB-dependent HIV-1 LTR activation. α-Lipoic Acid induces endoplasmic reticulum (ER) stress-mediated apoptosis in hepatoma cells. α-Lipoic Acid can be used with CPUL1 (HY-151802) to construct the self-assembled nanoaggregate CPUL1-LA NA, which has improved antitumor efficacy than CPUL1.
    α-Lipoic Acid
  • HY-P1098
    Ac2-26
    		Inhibitor 99.43%
    Ac2-26 is the N-terminal peptide of annexin 1, and has anti-inflammatory activity. Ac2-26 induces a decrease in IKKβ protein in lysosomes by chaperone-mediated autophagy (CMA). Ac2-26 ameliorates lung ischemia-reperfusion injury. Ac2-26 also inhibits airway inflammation and hyperresponsiveness in an asthma rat model.
    Ac2-26
  • HY-N0716B
    Berberine sulfate
    		Inhibitor 99.23%
    Berberine sulfate is an alkaloid isolated from the Chinese herbal medicine Huanglian, as an antibiotic. Berberine sulfate induces reactive oxygen species (ROS) generation and inhibits DNA topoisomerase. Berberine sulfate has antineoplastic properties. The sulfate form improves bioavailability.
    Berberine sulfate
  • HY-101200
    Linsidomine hydrochloride
    		Activator 99.97%
    Linsidomine hydrochloride (SIN-1 chloride) is a spontaneous ROS/RNS generator and peroxynitrite donor. Linsidomine hydrochloride is a vasodilator and platelet aggregation inhibitor. Linsidomine hydrochloride induces oxidative stress-induced chondrocyte apoptosis and necrosis. Linsidomine hydrochloride inhibits the migration, proliferation and neointima formation of vascular smooth muscle cells by inhibiting the expression of annexin A2. In addition, low doses of Linsidomine hydrochloride shows protective effects on Zn2+ treated nerve cells.
    Linsidomine hydrochloride
  • HY-123942
    Diprovocim
    		Agonist 98.82%
    Diprovocim is a potent TLR1/TLR2 agonist. Diprovocim elicits full agonist activity in human THP-1 cells (EC50=110 pM). Diprovocim stimulates the release of TNF-α from mouse macrophages (EC50=1.3 nM). Diprovocim activates downstream MAPK and NF-κB signaling pathway. Diprovocim displays strong adjuvant activity in mice, particularly abetting cellular immune responses.
    Diprovocim
  • HY-N0170
    Indole-3-carbinol
    		Inhibitor 99.16%
    Indole-3-carbinol (I3C) inhibits NF-κB activity and also is an Aryl hydrocarbon receptor (AhR) agonist, and an inhibitor of WWP1 (WW domain-containing ubiquitin E3 ligase 1).
    Indole-3-carbinol
  • HY-13812
    QNZ
    		Inhibitor 99.50%
    QNZ (EVP4593) shows strong inhibitory effects on NF-κB transcriptional activation and TNF-α production with IC50s of 11 and 7 nM, respectively. QNZ (EVP4593) is a neuroprotective inhibitor of SOC channel.
    QNZ
  • HY-B1135
    Benzbromarone
    		99.91%
    Benzbromarone is an orally active anti-gout agent. Benzbromarone has anti-infammatory, anti-oxidative stress and nephroprotective effects. Benzbromarone can be used for the research of hyperuricemia and gout.
    Benzbromarone
  • HY-101410
    SDMA
    		Activator 98.0%
    SDMA (Symmetric dimethylarginine) is an endogenous inhibitor of nitric oxide (NO) synthase activity. SDMA, a novel kidney biomarker, permits earlier diagnosis of kidney disease than traditional creatinine testing.
    SDMA
  • HY-18935A
    CBL0137 hydrochloride
    		Inhibitor 99.72%
    CBL0137 hydrochloride is an inhibitor of the histone chaperone, FACT. CBL0137 hydrochloride can also activate p53 and inhibits NF-κB with EC50s of 0.37 and 0.47 μM, respectively.
    CBL0137 hydrochloride
  • HY-B0320A
    Cromolyn disodium
    		Inhibitor 99.98%
    Cromolyn (Cromoglycate) disodium is an orally active GSK-3β inhibitor with an IC50 of 2.0 μM. Cromolyn disodium is also a mast cell stabilizer that can inhibit the release of mediators from mast cells, regulate reflex bronchoconstriction, and reduce non-specific bronchial hyperreactivity, and Cromolyn disodium can be used in the research of bronchial asthma. In addition, Cromolyn disodium has multiple activities such as anti-inflammatory, anti-allergic, anti-histamine, anti-cancer, and neuroprotective effects.
    Cromolyn disodium
  • HY-16657
    TAPI-1
    		Inhibitor 99.36%
    TAPI-1 is a broad-spectrum MMP inhibitor and NF-κB p65 inhibitor that targets ADAM17/TACE, ADAM10 and other proteins. TAPI-1 reduces the proteolytic cleavage of membrane-bound TNF-α, decreases TNF-α levels, inhibits NF-κB pathway activation, and downregulates profibrotic markers. TAPI-1 reduces the proportion of proinflammatory immune cells, alleviates cardiac and airway fibrosis, and improves cardiac function after myocardial infarction. Meanwhile, TAPI-1 inhibits the viability, migration and invasion of esophageal squamous cell carcinoma cells, enhances the chemosensitivity of Cisplatin (HY-17394), induces apoptosis, and shows low toxicity to normal esophageal epithelial cells. TAPI-1 can be widely used in studies related to myocardial infarction-induced heart failure, severe traumatic tracheal stenosis, esophageal squamous cell carcinoma and other conditions.
    TAPI-1
  • HY-B1640
    Ethacrynic acid
    		Inhibitor 99.98%
    Ethacrynic acid has anti-inflammatory and anticancer activity. Ethacrynic acid is an orally active diuretic. Ethacrynic acid is an inhibitor of glutathione S-transferase (GSTs) and Wnt signaling pathways. Ethacrynic acid is a radiosensitizer. Ethacrynic acid can inhibit airway smooth muscle (ASM) contraction in mice. Ethacrynic acid can increase the outflow of aqueous humor from the eye for the study of glaucoma.
    Ethacrynic acid
  • HY-N0143
    Phlorizin
    		Inhibitor 99.93%
    Phlorizin (Floridzin) is an orally active non-selective sodium-glucose cotransporter (SGLT) inhibitor, with an IC50 of 0.04 μM and a Ki of 39 nM against hSGLT2, and an IC50 of 0.17 μM and a Ki of 0.31 μM against hSGLT1. Phlorizin promotes GLUT4 translocation, inhibits gluconeogenesis and promotes glycogen synthesis by activating the PI3K/Akt/mTOR pathway. Phlorizin reduces DNA damage and apoptosis (apoptosis) by inhibiting the NF-κB inflammatory pathway. Phlorizin induces apoptosis via activating the Caspase pathway by antagonizing the JAK/STAT3 and PCK pathways. Phlorizin also exhibits antibacterial, anti-inflammatory and neuroprotective activities.
    Phlorizin
  • HY-N2526
    Nervonic acid
    		Inhibitor 99.90%
    Nervonic acid is a monounsaturated fatty acid with oral activity. Nervonic acid exerts anti-inflammatory activity by inhibiting NF-κB signaling. Nervonic acid can be used in the study of neurodegenerative diseases.
    Nervonic acid
  • HY-N0274
    Caffeic acid phenethyl ester
    		Inhibitor 99.85%
    Caffeic acid phenethyl ester is a NF-κB inhibitor.
    Caffeic acid phenethyl ester
  • HY-W011474
    Geranylgeraniol
    		Inhibitor 99.54%
    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.
    Geranylgeraniol
  • HY-N0256
    Hederagenin
    		Inhibitor 99.95%
    Hederagenin is a triterpenoid saponin with orally active and antitumor activity. Hederagenin can inhibit the expression of iNOS, COX-2, and NF-κB in cells induced by LPS stimulation. Hederagenin also increases ROS production in cancer cells, disrupts mitochondrial membrane potential, and induces apoptosis. Hederagenin also sensitizes cancer cells to Cisplatin (HY-17394) and Paclitaxel (HY-B0015), enhancing induced apoptosis. Hederagenin can also bind to SKP2, with KD = 67.9 μM. Hederagenin also has preventive potential against alcoholic liver injury.
    Hederagenin
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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