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-110247
    TRAF-STOP inhibitor 6877002
    		Inhibitor 99.67%
    TRAF-STOP inhibitor 6877002 is a selective CD40-TRAF6 interaction inhibitor. TRAF-STOP inhibitor 6877002 exerts anti-atherosclerotic activity by blocking the CD40-TRAF6 signaling pathway, inhibiting classical monocyte activation, leukocyte recruitment, and macrophage activation and migration. TRAF-STOP inhibitor 6877002 reduces the phosphorylation levels of signaling intermediates in the canonical NF-κB pathway.
    TRAF-STOP inhibitor 6877002
  • HY-10072
    SPC 839
    		Inhibitor 99.86%
    SPC 839 (compound 10) is an orally active inhibitor of AP-1 and NF-kB mediated transcriptional activation with IC50 of 0.008 μM.
    SPC 839
  • HY-N1404
    Sodium aescinate
    		Inhibitor 99.26%
    Sodium aescinate is a triterpene saponin derived from Aesculus hippocastanum seeds, with anti-inflammatory and antioxidant activities. Sodium aescinate inhibits hepatocellular carcinoma growth by targeting CARMA3/NF-κB pathway.
    Sodium aescinate
  • HY-N2995
    Poricoic acid A
    		Modulator 99.19%
    Poricoic acid A can be isolated from Poria cocos. Poricoic acid A is an orally active anti-tumor agent. Poricoic acid A enhances melatonin inhibition of AKI-to-CKD transition by regulating Gas6/AxlNFκB/Nrf2 axis. Poricoic acid A also attenuatea fibroblast activation and abnormal extracellular matrix remodeling in renal fibrosis by activating AMPK and inhibiting Smad3. Poricoic acid A significantly reduces the magnitude of rise in serum creatinine and urea levels in rat model when combined with Melatonin. Poricoic acid A ameliorates renal fibrosis and podocyte injury by attenuating oxidative stress and inflammation through regulating NF-κB and Nrf2 in IRI rodent model in combination with Melatonin.
    Poricoic acid A
  • HY-P990165
    Anti-Mouse RANKL/CD254 Antibody (IK22/5)
    		Inhibitor 99.37%
    Anti-Mouse RANKL/CD254 Antibody (IK22/5) is an anti-mouse RANKL/CD254 IgG2a monoclonal antibody. Anti-Mouse RANKL/CD254 Antibody (IK22/5) inhibits osteoclast formation and activity by specifically blocking the binding of RANKL and RANK. Anti-Mouse RANKL/CD254 Antibody (IK22/5) can inhibit the expression of MuRF1/Trogin-1 and activation of NF-κB. Anti-Mouse RANKL/CD254 Antibody (IK22/5) can be used for research on cancer such as melanoma or colon cancer and osteoporosis.
    Anti-Mouse RANKL/CD254 Antibody (IK22/5)
  • HY-N0841
    Bruceine A
    		Inhibitor 99.89%
    Bruceine A (Dihydrobrusatol) is a natural quassinoid. Bruceine A is an inhibitor of parasites, NF-κB, and PFKFB4 (Kd: 44 nM). Bruceine A is an activator of P38α MAPK. Bruceine A has antiparasitic activity. Bruceine A has antitumor activity and inhibits cancer cell migration. Bruceine A blocks the cell cycle and induces apoptosis. Bruceine A can be used in parasites, pancreatic cancer, and breast cancer research.
    Bruceine A
  • HY-N1437
    Hydroxycitric acid
    		Activator 99.95%
    Hydroxycitric acid is an orally active, multi-target, multi-bioactive organic acid. activates Nrf2 and its downstream molecule GPX4, increases glutathione levels, and thereby inhibits ferroptosis. Hydroxycitric acid activates the Nrf2/Keap1 and ACLY/NF-κB signaling pathways, upregulates the activities of antioxidant enzymes such as superoxide dismutase, reduces MDA content, thereby alleviating oxidative stress and renal tubular epithelial cell apoptosis, and improves pulmonary vascular and right ventricular remodeling. Hydroxycitric acid activates both the AMPK and mTORC1/S6K pathways, triggers the unfolded protein response, arrests the cancer cell cycle, and induces DNA fragmentation.
    Hydroxycitric acid
  • HY-N0481
    Roburic acid
    		Inhibitor 99.93%
    Roburic acid acts as an anti-inflammatory, anti-tumor and osteoclastogenesis inhibitor, with a Ki of 7.066 μM against human TNF, an IC50 of 9 μM against human COX-2, and an IC50 of 5 μM against ovine COX-1. Roburic acid reduces the production of inflammatory mediators such as NO and IL-6 in macrophages by inhibiting the NF-κB and MAPK (p38/JNK) pathways. By competitively inhibiting the TNF-TNF-R1 interaction, Roburic acid blocks the downstream NF-κB signaling pathway, thereby inducing cell cycle arrest and apoptosis in cancer cells. Roburic acid specifically inhibits osteoclastogenesis and bone resorption by suppressing the RANKL/TRAF6/NF-κB/NFATc1 axis. Roburic acid can be used in research related to osteolytic diseases such as osteoporosis, colorectal cancer and inflammatory diseases.
    Roburic acid
  • HY-W040055
    Neopterin
    		Inhibitor 99.95%
    Neopterin is an immune system activator metabolized by GTP and can be produced by activated macrophages. Neopterin has the potential to resist vascular inflammation and atherosclerosis. Neopterin inhibits the phosphorylation of NF-κB and promotes the expression of PPAR-γ, thereby suppressing the inflammatory response of vascular endothelial cells, reducing the formation of macrophage foam cells, and regulating the migration and proliferation of vascular smooth muscle cells. Neopterin can be used in research fields such as cardiovascular diseases (such as atherosclerosis), inflammation-related diseases and tumor immunomonitoring.
    Neopterin
  • HY-N7700A
    Guluronic acid sodium
    		Inhibitor 98.0%
    Guluronic acid (G2013) sodium is an orally active oxidative stress regulator and anti-inflammatory agent that exerts pharmacological effects by down-regulating various pro-inflammatory and oxidative stress-related genes (such as TLR4, NF-κB, iNOS, etc.) and inhibiting the activities of COX-2, MMPs and VEGF. Low-dose Guluronic acid sodium up-regulates the expression of immunoregulatory genes SHIP1 and SOCS1, thereby effectively inhibiting cancer-related inflammation, tumor angiogenesis, cell adhesion and metastasis, while reducing the accumulation of immunosuppressive cells. Guluronic acid sodium significantly prolongs the survival time of tumor-bearing hosts within a concentration range without direct cytotoxicity, demonstrating favorable safety. Guluronic acid sodium has involved in the research of multiple sclerosis, ankylosing spondylitis, breast cancer and other inflammatory diseases.
    Guluronic acid sodium
  • HY-B0185R
    Lidocaine (Standard)
    		Inhibitor
    Lidocaine (Standard) is the analytical standard of Lidocaine. This product is intended for research and analytical applications. Lidocaine (Lignocaine) inhibits sodium channels involving complex voltage and using dependence. Lidocaine decreases growth, migration and invasion of gastric carcinoma cells via up-regulating miR-145 expression and further inactivation of MEK/ERK and NF-κB signaling pathways. Lidocaine is an amide derivative and has potential for the research of ventricular arrhythmia.
    Lidocaine (Standard)
  • HY-14928
    Lobeglitazone
    		Inhibitor
    Lobeglitazone is a new type of thiazolidinedione. Lobeglitazone is the orally active agonist for PPAR with EC50 of 137.4 nM and 546.3 nM for PPARγ and PPARα. Lobeglitazone is the inhibitor for ERK/JNK/Smad/NF-κB signaling pathway. Lobeglitazone exhibits anti-inflammatory, anti-diabetic, anti-fibrotic and anti-atherosclerotic properties.
    Lobeglitazone
  • HY-P1439A
    RS 09 TFA
    		Activator 99.87%
    RS 09 TFA is an LPS (HY-D1056) peptide mimic and TLR4 agonist. RS 09 TFA can bind to TLR-4 and activate NF-κB. RS 09 TFA can function as an adjuvant in vivo, enhancing the antigen-specific immune response.
    RS 09 TFA
  • HY-W011121
    2-Oleoylglycerol
    		Activator 99.9%
    2-Oleoylglycerol (2-OG) is a lipid found in the diet. It is a GPR119 agonist, with an EC50 value of 2.5 μM in activating hGPR119 in transiently transfected COS-7 cells. 2-Oleoylglycerol enhances the inflammatory response of macrophages and promotes fibrosis by activating the GPR119/TAK1/NF-κB/TGF-β1 signaling pathway. It also stimulates glucagon-like peptide 1 (GLP-1) secretion in vivo. 2-Oleoylglycerol is expected to be used in the research of non-alcoholic steatohepatitis (NASH) .
    2-Oleoylglycerol
  • HY-N0762
    Isobavachin
    		Inhibitor 99.88%
    Isobavachin is an orally active, blood-brain barrier-penetrating prenylated flavonoid present in Psoralea corylifolia. Isobavachin inhibits human CYP2B6, CYP2C9, CYP2C19, UGT1A1, UGT1A9, and UGT2B7. Isobavachin suppresses MAPK activation, NF-κB nuclear translocation, overexpression of iNOS/COX-2, FcεRI-mediated signaling pathways, and RANKL-induced osteoclastogenesis. Isobavachin induces autophagy, cytotoxicity, neuronal differentiation, and NRF2 activation; it alleviates oxidative damage, inflammatory responses, apoptosis, iron accumulation, mitochondrial biogenesis, and mast cell degranulation. Isobavachin is applicable to research related to liver injury, inflammatory diseases, osteoporosis, liver cancer, prostate cancer, glioma, periodontitis-induced bone loss, and Alzheimer's disease.
    Isobavachin
  • HY-115062
    MJ33 lithium salt
    		Inhibitor 99.0%
    MJ-33 lithium salt is a competitive phospholipase A2 (PLA2) inhibitor with an IC50 of 0.3 μM. MJ-33 lithium salt inhibits NOX2 activation and reduces ROS production by blocking the PLA2 activity of Prdx6. MJ-33 lithium salt effectively inhibits the activity of acidic PLA2 (pH 4.0) and reduces the degradation of alveolar surfactant phosphatidylcholine (PC), but exerts no effect on alkaline PLA2 (pH 8.5). MJ-33 lithium salt significantly alleviates lung oxidative injury induced by ischemia-reperfusion (I/R). MJ-33 lithium salt significantly inhibits the invasion, migration and adhesion abilities of prostate cancer cells by suppressing the MAPK, AKT, NF-κB and AP-1 signaling pathways. MJ-33 lithium salt can be used for the research of ROS-related diseases and prostate cancer.
    MJ33 lithium salt
  • HY-N1365
    Isoscopoletin
    		Inhibitor 99.92%
    Isoscopoletin (6-Hydroxy-7-methoxycoumarin) is an active constituent in Artemisia argyi leaves. Isoscopoletin shows substantial inhibition against cell proliferation, with IC50s of 4.0 μM and 1.6 μM for human CCRF-CEM leukaemia cells and multidrug resistant subline CEM/ADR5000, respectively. Isoscopoletin (6-Hydroxy-7-methoxycoumarin) possesses inhibitory activity against HBV replication. Isoscopoletin exhibits anti-inflammatory activity through inhibition of MAPK/NF-κB/STAT/AKT signaling pathway.
    Isoscopoletin
  • HY-119459
    Fluopyram
    		Activator 99.76%
    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-P3042
    Chymostatin
    		Inhibitor 99.9%
    Chymostatin is a SARS-CoV-2 Mpro inhibitor. Chymostatin up-regulates endocan and inhibits NF-κBp65 activity. Chymostatin reduces proinflammatory cytokines (IL-1β and IL-6) and HMGB1. Chymostatin shows protective effects against Paraquat-induced acute lung injury. Chymostatin exhibits anticancer activity against lung cancer.
    Chymostatin
  • HY-N0852
    Benzoylpaeoniflorin
    		Inhibitor 99.35%
    Benzoylpaeoniflorin is an orally active monoterpene glycoside compound. Benzoylpaeoniflorin exerts anti-inflammatory, anti-allergic, psoriasis-improving and sepsis-improving effects by inhibiting signaling pathways such as TNF/NF-κB and MAPK, as well as regulating immune homeostasis. Benzoylpaeoniflorin can be used in research related to immune, allergic and inflammatory diseases.
    Benzoylpaeoniflorin
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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