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-N0390S4
    L-Glutamine-5-13C
    		Inhibitor 98.0%
    L-Glutamine-5-13C is the 13C-labeled L-Glutamine (HY-N0390). L-Glutamine is an orally active nutritional agent and cellular metabolism regulator. L-Glutamine is taken up in a Na+-dependent manner and targets multiple key molecules including glutaminase, mTORC1, NF-κB, STAT-3 and HIF-1α. L-Glutamine enhances glutaminolytic catabolism, drives the conversion of glutamate to α-ketoglutarate, thereby regulating gene expression, integrating metabolic signals, mediating glutamine flux and maintaining redox homeostasis. L-Glutamine also promotes cell proliferation, osteogenic differentiation and fracture healing, exerts neuroprotective and cardioprotective effects, and inhibits osteoarthritis. L-Glutamine can be applied to research related to osteoporosis, osteoarthritis, ischemic stroke and acute cantharidin-induced cardiotoxicity.
    L-Glutamine-5-<sup>13</sup>C
  • HY-175764
    FIP22
    		Inhibitor 98.53%
    FIP22 is a potent and selective IRAK4 PROTAC degrader (HEK293T cells: DC50 = 3.2 nM; THP-1 cells: DC50 = 10.6 nM). FIP22 induces the ubiquitin-proteasome system by forming an IRAK4-FIP22-CRBN ternary complex (EC50 = 12.63 nM), thereby potently blocking IRAK4-mediated NF-κB and MAPK signaling pathways. FIP22 can be used for the study of atopic dermatitis (Pink: IRAK4 ligand (HY-175765); Blue: CRBN ligand (HY-W087383); Black: Linker (HY-46871)).
    FIP22
  • HY-N3001
    Isolinderalactone
    		Inhibitor 98.79%
    Isolinderalactone is a sesquiterpene that exhibits anti-cancer, anti-inflammatory, and neuroprotective effects. Isolinderalactone inhibits VEGF expression and tyrosine phosphorylation of VEGFR2. Isolinderalactone decreases viability and induces apoptosis in U-87 glioblastoma (GBM) cells and colorectal cancer (CRC) cells. Isolinderalactone induces G2/M phase cell cycle arrest, ROS generation, pJNK/p38 MAPK activation, in colorectal cancer (CRC) cells. Isolinderalactone blocks LPS (HY-D1056)-induced NF-κB activation while activating Nrf2-HMOX1 signaling in RAW264.7 macrophages. Isolinderalactone improves cognitive dysfunction in APP/PS1 mice. Isolinderalactone can be used for the study of Glioblastoma multiforme (GBM), colorectal cancer, Alzheimer’s disease and acute lung injury.
    Isolinderalactone
  • HY-N12717
    Casuarinin
    		Inhibitor 98.24%
    Casuarinin is an orally active antiproliferative, anti-inflammatory, antifungal, virucidal and gastroprotective agent. Casuarinin upregulates the expression of p21/WAF1, Fas/APO‑1, mFasL, sFasL and HSP‑70, arrests cell cycle, induces apoptosis and inhibits cancer cell proliferation. Casuarinin inhibits TNF‑α-induced phosphorylation of MAPK and activation of NF‑κB, downregulates the expression of iNOS, NF‑κB, COX‑2 and ICAM‑1, and reduces the production of proinflammatory mediators. Casuarinin attenuates ethanol-induced activation of caspase‑3 and elevation of TNF‑α, inhibits the growth of Candida albicans, and inhibits HSV‑2. Casuarinin can be used in research related to mammary adenocarcinoma, inflammatory skin diseases, gastric ulcers, candidiasis and herpes simplex virus infections.
    Casuarinin
  • HY-N0772
    Isomangiferin
    		Inhibitor 99.60%
    Isomangiferin is an orally active xanthone C-glucoside, and its chemical structure is similar to Mangiferin (HY-N0290). Isomangiferin is an effective VEGFR-2 kinase inhibitor, which can induces cell apoptosis, inhibit the growth, metastasis and angiogenesis of breast cancer. Isomangiferin exerts anti-inflammatory effects by inhibiting the HMGB1/NLRP3/NF-κB signaling pathway, thereby improving the renal function indicators of diabetic mice. Isomangiferin exhibits inhibitory effects on various bacteria and herpes simplex virus type 1 (HSV-1). Isomangiferin promotes the migration and osteogenic differentiation of bone marrow mesenchymal stem cells (BMSCs) and reduces cell apoptosis and the production of ROS by activating the AMPK/ACC pathway, thereby facilitating fracture healing.
    Isomangiferin
  • HY-P11296A
    LLVK TFA
    		Inhibitor 99.50%
    LLVK TFA is a selective IκB phosphorylation inhibitor. LLVK TFA reduces LPS-induced pro-inflammatory cytokines (IL-1β, IL-6, TNF-α). LLVK TFA is promising for research of inflammatory bowel disease and rheumatoid arthritis.
    LLVK TFA
  • HY-N0208
    Kaempferol-3-O-glucorhamnoside
    		Inhibitor 99.64%
    Kaempferol-3-O-glucorhamnoside, a flavonoid derived from plant Thesium chinense Turcz, inhibits inflammatory responses via MAPK and NF-κB pathways in vitro and in vivo.
    Kaempferol-3-O-glucorhamnoside
  • HY-N3181
    Nodosin
    		Inhibitor 98.61%
    Nodosin is an orally active diterpenoid compound that can be isolated from Isodon serra. Nodosin can inhibit the proliferation and induce cell cycle arrest and apoptosis of tumor cells. Nodosin can also inhibit oxidative stress, inflammatory responses, and ferroptosis. Nodosin has anti-inflammatory and anti-tumor activities.
    Nodosin
  • HY-P1860A
    TNF-α (31-45), human TFA
    		Activator 99.40%
    TNF-α (31-45), human TFA is a potent NF-kB pathway activator. TNF-αis a proinflammatory cytokine that induces necrosis or apoptosis. TNF alpha stimulates NF-κB pathway via TNFR2 promotes cancer growth, invasion, and metastasis.
    TNF-α (31-45), human TFA
  • HY-111954
    (+)-Erinacin A
    		99.81%
    (+)-Erinacin A (Erinacine A) is a cyanoditerpenoid isolated from Hericium erinaceus with anticancer, anti-inflammatory and neuroprotective activities. (+)-Erinacin A can induce cancer cell death by activating extrinsic and intrinsic apoptosis pathways. (+)-Erinacin A can also inhibit the expression of NO synthase (iNOS) and the production of nitrotyrosine to exert inflammatory and neuroprotective effects, thereby reducing ischemic brain damage.
    (+)-Erinacin A
  • HY-N3387
    Licoricidin
    		Inhibitor 98.00%
    Licoricidin (LCD) is isolated from Glycyrrhiza uralensis Fisch, possesses anti-cancer activities. Licoricidin (LCD) inhibit SW480 cells (IC50=7.2 μM) by inducing cycle arrest, apoptosis and autophagy, and is a potential chemopreventive or chemotherapeutic agent against colorectal cancer. Licoricidin (LCD) inhibits Lung Metastasis by inhibition of tumor angiogenesis and lymphangiogenesis as well as changes in the local microenvironment of tumor tissues the anticarcinogenic effect. Licoricidin enhanced gemcitabine-induced cytotoxicity in Osteosarcoma (OS) cells by inactivation of the Akt and NF-κB pathways in vitro and in vivo. Licoricidin blocks UVA-induced photoaging via ROS scavenging, limits the activity of MMP-1, it can be considered as an active ingredient in new topically applied anti-ageing formulations.
    Licoricidin
  • HY-P991598
    MOR-106
    		Inhibitor
    MOR-106 (MOR12743) is a humanized anti-IL-17C IgG1 monoclonal antibody. MOR-106 inhibits the NF-κB signaling pathway by specifically binding to IL-17C (IC50 = 59 pM for human IL-17C, IC50 = 55 pM for mouse IL-17C). MOR-106 can effectively inhibit skin inflammation and reduce related inflammatory factors in animal models of psoriasis and atopic dermatitis.
    MOR-106
  • HY-N6812
    Karacoline
    		99.58%
    Karacoline, a diterpene alkaloid found in the plant Aconitum kusnezoffii, reduces degradation of the extracellular matrix (ECM) in intervertebral disc degeneration (IDD) via the NF-κB signaling pathway.
    Karacoline
  • HY-N2303
    Eriocalyxin B
    		Inhibitor 99.93%
    Eriocalyxin B is a diterpenoid compound that can be isolated from Chinese herb Isodon eriocalyx. Eriocalyxin B exhibits multiple activities, such as anti-cancer, anti-inflammatory, and inhibition of adipogenesis. Eriocalyxin B is capable of inducing apoptosis and autophagy in tumor cells. Eriocalyxin B can be used in the research of cancers, autoimmune diseases, and other conditions.
    Eriocalyxin B
  • HY-173063
    TLR8 antagonist-1
    		Inhibitor 99.95%
    TLR8 antagonist-1 (Compound 10) is a selective TLR8 antagonist. TLR8 antagonist-1 can inhibit TLR8-mediated inflammation and signaling pathways, reduce the recruitment of MyD88, and inhibit the NF-κB and IRF pathways. TLR8 antagonist-1 has anti-inflammatory activity.
    TLR8 antagonist-1
  • HY-N0761A
    trans-Isoferulic acid
    		Activator 99.93%
    trans-Isoferulic acid (trans-3-Hydroxy-4-methoxycinnamic acid) is an aromatic acid that exhibits anti-inflammatory activity. trans-Isoferulic acid dephosphorylates PI3K/Akt, suppresses LPS (HY-D1056)-induced NF-κB activation, enhances Nrf2 activity, downregulates iNOS and COX-2 expression, induces HO-1 expression, inhibits NO and PGE2 production, and scavenges hydroperoxyl radical. trans-Isoferulic acid can be used for research of inflammatiory diseases.
    trans-Isoferulic acid
  • HY-14655R
    Sulfasalazine (Standard)
    		Inhibitor
    Sulfasalazine (Standard) is the analytical standard of Sulfasalazine. This product is intended for research and analytical applications. Sulfasalazine (NSC 667219) is an anti-rheumatic agent for the research of rheumatoid arthritis and ulcerative colitis. Sulfasalazine can suppress NF-κB activity. Sulfasalazine is a type 1 ferroptosis inducer.
    Sulfasalazine (Standard)
  • HY-N2106
    Dehydroevodiamine
    		99.93%
    Dehydroevodiamine is a major bioactive quinazoline alkaloid isolated from Evodiae Fructus, has an antiarrhythmic effect in guinea-pig ventricular myocytes. Dehydroevodiamine inhibits LPS-induced iNOS, COX-2, prostaglandin E2 (PGE2) and nuclear factor-kappa B (NF-κB) expression in murine macrophage cells.
    Dehydroevodiamine
  • HY-N10303
    Withangulatin A
    		Inhibitor 99.76%
    Withangulatin A is the inhibitor for COX-2. Withangulatin A inhibits MAPK, NF-κB, Akt/mTOR/p70S6K pathway, exhibits antitumor, anti-inflammatory and trypanocidal activities.
    Withangulatin A
  • HY-107859S
    Tris(2-chloroethyl)phosphate-d12
    		Activator 99.15%
    Tris(2-chloroethyl)phosphate-d12 is the deuterium labeled Tris(β-chloroethyl) phosphate. Tris(2-chloroethyl) phosphate is a widely used organic phosphorus flame retardant, mainly used as a plasticizer. Tris(2-chloroethyl) phosphate has orally active hepatotoxicity, inducing an increase in reactive oxygen species (ROS) and calcium ions (Ca²⁺) influx, a decrease in mitochondrial membrane potential (△Ψm), and causing DNA damage and cell apoptosis. Tris(2-chloroethyl) phosphate directly binds to FXR, inducing obesity and the formation of fatty liver in mice. Chloroethyl) phosphate activates the TLR4/NF-κB pathway, triggering liver inflammation.
    Tris(2-chloroethyl)phosphate-d<sub>12</sub>
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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