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-15027S
    5-Aminosalicylic Acid-d3 hydrochloride
    		Inhibitor 99.00%
    5-Aminosalicylic Acid-d3 (hydrochloride) is the deuterium labeled 5-Aminosalicylic Acid. 5-Aminosalicylic acid (Mesalamine) hydrochloride acts as a specific PPARγ agonist and also inhibits p21-activated kinase 1 (PAK1) and NF-κB.
    5-Aminosalicylic Acid-d<sub>3</sub> hydrochloride
  • HY-139715
    IMD-ferulic
    		Modulator
    IMD-ferulic is a covalently linked NF-κB modulator that improves the adjuvanticity of small molecule immune potentiators.
    IMD-ferulic
  • HY-P11093
    Papiliocin
    		Inhibitor
    Papiliocin is a potent peptide antibiotic with both anti-inflammatory and antibacterial activities. Papiliocin is primarily active against Gram-negative bacteria. Papiliocin exhibits strong anti-inflammatory activity against cell, exerting its anti-inflammatory activity by inhibiting the production of NO and the secretion of TNF-α and MIP-2. Papiliocin participates in the innate defense response mechanism by inhibiting the Toll-like receptor pathway and NF-κB. Papiliocin induces apoptosis in fungal cells and increases the total level of intracellular ROS. Papiliocin acts as an effective antiseptic peptide in sepsis models. Papiliocin is useful in anti-inflammatory and antibacterial research.
    Papiliocin
  • HY-162844
    CDN-3
    		Activator
    CDN-3 (Compound 10) is a cyclic dideoxy nucleotide derivative. CDN-3 can stimulate the production of IFN-β, activate the IRF-3 and NF-κB pathways, and induce the production of type I interferons as well as pro-inflammatory factors such as IL-6 and TNF-α. CDN-3 can inhibit cancer cells proliferation. CDN-3 can be used for research of colon cancer.
    CDN-3
  • HY-143243
    Antioxidant agent-5
    		Inhibitor
    Antioxidant agent-5 (compound D-6) is a potent antioxidant agent. Antioxidant agent-5 can inhibit oxLDL (oxidized low-density lipoprotein)-induced apoptosis and the expression of ICAM-1 and VCAM-1 in VECs. Antioxidant agent-5 suppresses oxLDL-induced increase of ROS level and nuclear translocation of NF-κB. Antioxidant agent-5 protects against oxLDL-induced endothelial injury by activating Nrf2/HO-1 anti-oxidation pathway.
    Antioxidant agent-5
  • HY-175833
    NF-κB-IN-20
    		Inhibitor
    NF-κB-IN-20 is an orally active NF-κB inhibitor. NF-κB-IN-20 directly binds to the Keap1 protein, activating the Keap1/Nrf2/HO-1 antioxidant pathway, and simultaneously inhibiting the NF-κB inflammatory pathway, thereby synergistically reducing oxidative stress and inflammatory responses. NF-κB-IN-20 M11 inhibits the expression of IL-6, IL-1β, and TNF-α, significantly reduces the level of ROS, and restores the mitochondrial membrane potential. NF-κB-IN-20 can be used for the study of acute lung injury (ALI).
    NF-κB-IN-20
  • HY-B1773AS2
    Sodium propionate-13C2
    		Inhibitor
    Sodium propionate-13C-2 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<sub>2</sub>
  • HY-175007
    RIPK1-IN-32
    		Inhibitor
    RIPK1-IN-32 is a RIPK inhibitor with anti-inflammatory activity. RIPK1-IN-32 inhibits nitric oxide (NO) release with an IC50 of 3.26 μM. RIPK1-IN-32 significantly alleviates acute liver injury associated with sepsis through the RIPK1/NF-κB/MAPK pathway, therefore preventing the nuclear translocation of p65 and c-fos, which results in reduced expression of TNF-α and IL-6. RIPK1-IN-32 can be used for the study of acute liver injury and sepsis.
    RIPK1-IN-32
  • HY-N7182
    9,10-Dimethoxycanthin-6-one
    		Inhibitor
    9,10-Dimethoxycanthin-6-one is an alkaloid compound. 9,10-Dimethoxycanthin-6-one exhibits NF-κB inhibitory effects with an IC50 of 19.5 μM.
    9,10-Dimethoxycanthin-6-one
  • HY-125864D
    Rabbit Fibrinogen
    		Activator
    Rabbit Fibrinogen is a native fibrinogen from rabbit plasma. Fibrinogen is a selective proteolytic molecule that can be activated by thrombin to assemble fibrin clots. Fibrinogen can regulate the activation of NF-KB in endothelial cells and upregulate the expression of inflammatory chemokines MCP-1 and MCP-1. Fibrinogen plays a key role in blood clotting, thrombosis, atherosclerosis and the pathological development of venous grafts, and can be used in the study of blood clotting and vascular diseases.
    Rabbit Fibrinogen
  • HY-128853S1
    Taurodeoxycholat-d4 sodium
    Taurodeoxycholat-d4 sodium is the deuterium labeled Taurodeoxycholate sodium (HY-128853). Taurodeoxycholate sodium salt is a bile salt-related anionic detergent. Taurodeoxycholate sodium salt is formed in the liver by conjugation of deoxycholate with Taurine (HY-B0351). Taurodeoxycholate sodium salt is used for isolation of membrane proteins including inner mitochondrial membrane proteins. Taurodeoxycholate (TDCA) exhibits anti-inflammatory and neuroprotective effects.
    Taurodeoxycholat-d<sub>4</sub> sodium
  • HY-147836
    Akt/NF-κB/JNK-IN-1
    		Inhibitor
    Akt/NF-κB/JNK-IN-1 (Compound 2i) is an inhibitor of Akt, NF-κB and JNK signaling pathways. Akt/NF-κB/JNK-IN-1 inhibits nitric oxide production with an IC50 of 3.15 μM. Akt/NF-κB/JNK-IN-1 shows anti-inflammatory activities.
    Akt/NF-κB/JNK-IN-1
  • HY-N0622R
    Morusin (Standard)
    		Inhibitor
    Morusin (Standard) is the analytical standard of Morusin. This product is intended for research and analytical applications. Morusin is a prenylated flavonoid isolated from Morus alba Linn. with various biological activities, such as antitumor, antioxidant, and anti-bacteria property. Morusin could inhibit NF-κB and STAT3 activity.
    Morusin (Standard)
  • HY-N0031R
    Plantamajoside (Standard)
    		Inhibitor
    Plantamajoside (Standard) is the analytical standard of Plantamajoside. This product is intended for use in research and analytical applications. Plantamajoside is an orally active phenylpropanoid glycoside. Plantamajoside can be isolated from Plantago asiatica L.(Plantaginaceae). Plantamajoside inactivates NF-κB, PI3K/akt, induces Apoptosis, and improves Autophagy. Plantamajoside regulates MAPK, integrin-linked kinase/c-Src. Plantamajoside inhibits multiple cancers, improves lung and kidney damage. Plantamajoside has neuroprotective and anti-inflammatory effects.
    Plantamajoside (Standard)
  • HY-W015490R
    1,4-Naphthoquinone (Standard)
    		Inhibitor
    1,4-Naphthoquinone is an inhibitor with broad-spectrum inhibitory activity targeting DNA polymerase, NF-κB and monoamine oxidase (MAO-A/B), with antibacterial and anti-biofilm efficacy. 1,4-Naphthoquinone is a competitive inhibitor of MAO-B (Ki=1.4 μM) and a non-competitive inhibitor of MAO-A (Ki=7.7 μM). 1,4-Naphthoquinone inhibits DNA polymerase pol α, β, γ, δ, ε, λ with IC50 ranging from 5.57-128 μM. 1,4-Naphthoquinone inhibits tumor cell proliferation, induces apoptosis and necrosis, and has anti-angiogenic and anti-inflammatory activities by inducing oxidative stress, depleting glutathione (GSH), inhibiting DNA polymerase-mediated DNA synthesis and blocking NF-κB nuclear translocation. 1,4-Naphthoquinone can be used in anti-bacterial , anti-tumor and anti-inflammatory studies, including inhibition of melanoma and colon cancer cell growth and endothelial cell function, as well as LPS-induced inflammation models.
    1,4-Naphthoquinone (Standard)
  • HY-N9149
    Cryptanoside A
    		Inducer
    Cryptanoside A, a cardiac glycoside epoxide, can be isolated from the stems of Cryptolepis dubia. Cryptanoside A has potent cytotoxicity against cancer cells. Cryptanoside A also inhibits Na+/K+-ATPase activity. Cryptanoside A increases the expression of Akt and the p65 subunit of NF-κB.
    Cryptanoside A
  • HY-N1965R
    Gaultherin (Standard)
    		Inhibitor
    Gaultherin (Standard) is the analytical standard for Gaultherin (HY-N1965). Gaultherin is an orally active non-steroidal anti-inflammatory agent. Gaultherin selectively inhibits NF-κB, MAPK, COX-2 (IC50 = 0.35 mg/mL), LOX (IC50 = 0.56 mg/mL) and HYAL (IC50 = 28.58 μg/mL) to exert anti-inflammatory, antipyretic and analgesic effects. Gaultherin exhibits modest direct antioxidant capacity, greater in cell-based models. Gaultherin does not affect COX-1 so that avoids the common gastrointestinal side effects of Aspirin (HY-14654).
    Gaultherin (Standard)
  • HY-135444
    Heliangin
    		Inhibitor
    Heliangin is a Sesquiterpenoids product that can be isolated from the herbs of Helianthus tuberosus L..
    Heliangin
  • HY-N12378A
    α-Patchoulene
    		Inhibitor
    α-Patchoulene is an orally active anti-inflammatory, antioxidant, and anti-apoptotic agent. α-Patchoulene inhibits the NF-κB, TLR4, and cAMP/PKA/CREB signaling pathways; activates the Sirt1/Nrf2 and AMPK signaling pathways; and targets Fas/FasL, Caspase-3, ERK1/2, ROCK1/MLC2 for inhibition. α-Patchoulene regulates cytokine secretion, inflammatory cell infiltration, lipid peroxidation, cell polarization, gut microbiota, and lipid metabolism, restores barrier function, mitochondrial function, and cell viability, and exhibits repellent activity against Spodoptera exigua larvae. α-Patchoulene can be used in research related to various inflammatory, ischemic, fibrosis-associated diseases, as well as hepatocellular carcinoma.
    α-Patchoulene
  • HY-107574R
    TC-E 5003 (Standard)
    		Modulator
    TC-E 5003 (Standard) is the analytical standard of TC-E 5003 (HY-107574). This product is intended for research and analytical applications. TC-E 5003 is a selective protein arginine methyltransferase 1 (PRMT1) inhibitor with an IC50 of 1.5 µM against hPRMT1. TC-E 5003 modulates the lipopolysaccharide (LPS) (HY-D1056)-induced AP-1 and NF-κB signaling pathways with anti-inflammatory properties. TC-E 5003 also upregulates the expression of Ucp1 and Fgf21, activates protein Kinase A signaling and lipolysis in primary subcutaneous adipocytes from both mouse and humans. TC-E 5003 is promising for research of obesity and associated metabolic disorders, oxidative stress, inflammation and cancers.
    TC-E 5003 (Standard)
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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