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-W011474S
    Geranylgeraniol-d5
    Geranylgeraniol-d5 is the deuterium labeled Geranylgeraniol (HY-W011474). 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-d<sub>5</sub>
  • HY-W709448
    Oxaprozin-d10
    Oxaprozin-d10 (Oxaprozinum-d10; Wy21743-d10) is the deuterium labeled Oxaprozin (HY-B0808). Oxaprozin is an orally active and potent COX inhibitor, with IC50 values of 2.2 μM for human platelet COX-1 and and 36 μM for IL-1-stimulated human synovial cell COX-2, respectively. Oxaprozin also inhibits the activation of NF-κB. Oxaprozin induces cell apoptosis. Oxaprozin shows anti-inflammatory activity. Oxaprozin-mediated inhibition of the Akt/IKK/NF-κB pathway contributes to its anti-inflammatory properties.
    Oxaprozin-d10
  • HY-146058
    NF-κB/PON1-IN-1
    		Inhibitor
    NF-κB/PON1-IN-1 (Compound 16) is a NF-κB/PON1 pathway inhibitor. NF-κB/PON1-IN-1 has antioxidant (IC50 = 45.76 µM) and hepatoprotective activities.
    NF-κB/PON1-IN-1
  • HY-Y0148R
    10-Hydroxydecanoic acid (Standard)
    		Inhibitor
    10-Hydroxydecanoic acid (Standard) is the analytical standard of 10-Hydroxydecanoic acid. This product is intended for research and analytical applications. 10-Hydroxydecanoic acid (10-HDAA) is a saturated fatty acid derived from 10-hydroxy-trans-2-decenoic acid, which can be isolated from royal jelly. 10-Hydroxydecanoic acid exhibits various biological activities, including anti-inflammatory, insecticidal, anti-malarial, and anti-Leishmania properties, as well as enhancing antigen-specific immune responses. The anti-inflammatory effects of 10-Hydroxydecanoic acid are primarily mediated by inhibiting the activation of NF-κB and the translation of interferon regulatory factor 1 (IRF-1), which reduces the production of interleukin 6 (IL-6) and nitric oxide (NO) in inflammatory cells. Additionally, 10-Hydroxydecanoic acid alleviates neuroinflammatory responses through the p53-autophagy pathway and the p53-NLRP3 pathway. Finally, 10-Hydroxydecanoic acid enhances antigen-specific immune responses by promoting the effective uptake of antigens by microfold cells[1][2][3][4][5].
    10-Hydroxydecanoic acid (Standard)
  • HY-N0452R
    Hyperoside (Standard)
    		Inhibitor
    Hyperoside (Standard) is the analytical standard of Hyperoside. This product is intended for research and analytical applications. Hyperoside is a NF-κB inhibitor, found from Hypericum monogynum. Hyperoside shows anti-tumor, antifungal, anti-inflammatory, anti-viral, and anti-oxidative activities, and can induce apoptosis.
    Hyperoside (Standard)
  • HY-17473R
    Embelin (Standard)
    		Inhibitor
    Embelin (Standard) is the analytical standard of Embelin. This product is intended for research and analytical applications. Embelin (Embelic acid), a potent, nonpeptidic XIAP inhibitor (IC50=4.1 μM), inhibits cell growth, induces apoptosis, and activates caspase-9 in prostate cancer cells with high levels of XIAP. Embelin blocks NF-kappaB signaling pathway leading to suppression of NF-kappaB-regulated antiapoptotic and metastatic gene products. Embelin also induces autophagic and apoptotic cell death in human oral squamous cell carcinoma cells.
    Embelin (Standard)
  • HY-N0103R
    Sophocarpine (Standard)
    		Inhibitor
    Sophocarpine (Standard) is the analytical standard of Sophocarpine (HY-N0103). This product is intended for research and analytical applications. Sophocarpine is a PTEN activator and an inhibitor of PI3K/Akt, MEK/ERK, and NF-κB signaling pathways. Sophocarpine upregulates PTEN expression and inhibits PI3K/Akt phosphorylation, arrests tumor cell cycle and induces apoptosis. Sophocarpine inhibits MEK/ERK phosphorylation and VEGF secretion, reducing tumor cell migration. Sophocarpine 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 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 (Standard)
  • HY-130237R
    Cinnamtannin B-1 (Standard)
    		Inhibitor
    Cinnamtannin B-1 (Standard) is the analytical standard of Cinnamtannin B-1. This product is intended for research and analytical applications. Cinnamtannin B-1 is a anthocyanidin. Cinnamtannin B-1 inhibits the osteoclast formation by inhibiting NF-kB signaling pathway and ROS generation. Cinnamtannin B-1 exhibits antioxidant, anti-inflammatory, antitumor and anti-platelet aggregation activities. Cinnamtannin B-1 is orally active.
    Cinnamtannin B-1 (Standard)
  • HY-111214
    K-14585
    		Inhibitor
    K-14585 is a peptide competitive PAR2 antagonist. K-14585 inhibits PAR2-dependent IL-8 production, NF-κB phosphorylation, and p38 signaling. K-14585 reduces SLIGKV (PAR2 agonist peptide)-induced Ca2+ mobilisation in primary human keratinocytes.
    K-14585
  • HY-N15653
    Heveadride
    		Inhibitor
    Heveadride is a fungal metabolite and an antifungal agent. Heveadride is active against various filamentous fungi and some human pathogenic yeasts. Heaveadride induces down-regulation of TNFα-induced NF-κB activity in human chronic myeloid leukemia cells with an IC50 of 82.7 μM.
    Heveadride
  • HY-126849
    3-Morpholinosydnonimine
    		Activator
    3-Morpholinosydnonimine (SIN-1) is a spontaneous ROS/RNS generator and peroxynitrite donor. 3-Morpholinosydnonimine is a vasodilator and platelet aggregation inhibitor. 3-Morpholinosydnonimine induces oxidative stress-induced chondrocyte apoptosis and necrosis. 3-Morpholinosydnonimine inhibits the migration, proliferation and neointima formation of vascular smooth muscle cells by inhibiting the expression of annexin A2. In addition, low doses of 3-Morpholinosydnonimine shows protective effects on Zn2+ treated nerve cells.
    3-Morpholinosydnonimine
  • HY-153762
    COX-2-IN-32
    		Inhibitor
    COX-2-IN-32 (Compound 2f) is an iNOS and COX-2 inhibitor. COX-2-IN-32 decreases the expression of NF-κB. COX-2-IN-32 has anti-inflammatory activity by inhibits NO production in LPS-induced RAW264.7 macrophages (IC50: 11.2 μM).
    COX-2-IN-32
  • HY-76006R
    3-Hydroxybenzaldehyde (Standard)
    		Inhibitor
    3-Hydroxybenzaldehyde (Standard) is the analytical standard of 3-Hydroxybenzaldehyde. This product is intended for research and analytical applications. 3-Hydroxybenzaldehyde (3-HBA) is a precursor compound for phenolic compounds like Protocatechuic aldehyde (PCA) (HY-N0295). 3-Hydroxybenzaldehyde, produced by 3-hydroxybenzyl-alcohol dehydrogenase, is a substrate of aldehyde dehydrogenase (ALDH) in rats and humans. 3-Hydroxybenzaldehyde has vasculoprotective effects in vitro and in vivo. 3-Hydroxybenzaldehyde is proming for research of atherosclerosis[1][2][3][4].
    3-Hydroxybenzaldehyde (Standard)
  • HY-N9955
    Isonardosinone
    		Inhibitor
    Isonardosinone is a nardosinone-type sesquiterpenes, which can be isolated from Valerianaceae. Isonardosinone inhibits NF-κB and MAPK signaling pathway, suppresses expression of iNOS and cyclooxygenase-2 (COX-2) in Lipopolysaccharides (HY-D1056)-induced BV2 microglia, exhibits anti-inflammatory activity.
    Isonardosinone
  • HY-121632R
    Quinoclamine (Standard)
    		Inhibitor
    Quinoclamine (Standard) is the analytical standard of Quinoclamine. This product is intended for research and analytical applications. Quinoclamine, a naphthoquinone derivative, is a NF-κB inhibitor. Quinoclamine exhibits anti-cancer activity.
    Quinoclamine (Standard)
  • HY-162805
    iNOS/TopoI-IN-1
    		Inhibitor
    iNOS/TopoI-IN-1 (compound AuL9) is a multi-target hybrid molecule with anti-tumor, anti-inflammatory and antioxidant activities. iNOS/TopoI-IN-1 inhibits the growth of breast cancer cells MCF-7 and MDA MB-231 in vitro with IC50 of 3.5 μM and 6.3 μM, respectively, and induces DNA damage and apoptosis of breast cancer cells by inhibiting human topoisomerase I (TopoI) (Ki=2.72 μM). In addition, NOS/TopoI-IN-1 inhibits the expression of iNOS by inhibiting the activation of NF-kB (Ki=1.49 μM).
    iNOS/TopoI-IN-1
  • HY-139718
    IMD-biphenylB
    		Modulator
    IMD-biphenylB is a potent imidazoquinolinone-NF-κB immunomodulator dimer that inhibits tumor proliferation while induces low systemic inflammation and reduces adjuvant toxicity.
    IMD-biphenylB
  • HY-111172
    Inotilone
    		Inhibitor
    Inotilone is an inhibitor of matrix metalloproteinase MMP-2 and MMP-9, to against metastatic in lung cancer cells. Inotilone enhances the activity of the antioxidant enzymes to support its anti-metastatic activity. Inotilone also inhibits IκBα phosphorylation and NFκB p65 nuclear translocation, involving in FAK, PI3K/AKT, MAPKs and NFκB pathways.
    Inotilone
  • HY-176426
    Subquinocin
    		Activator
    Subquinocin is a CYLD inhibitor that inhibits USP family deubiquitinases (DUBs). Subquinocin enhances the activation of NF-κB and IFN pathways by inhibiting CYLD. Subquinocin promotes RIG-I-mediated activation of IRF3 and/or IRF7 in the interferon pathway.
    Subquinocin
  • HY-N7128R
    Flavanone (Standard)
    		Inhibitor
    Flavanone (Standard) is the analytical standard of Flavanone. This product is intended for research and analytical applications. Flavanone is a naturally occurring flavone. Flavanone has inhibitory activity for human estrogen synthetase (aromatase). lavanone is the inhibitor for ERK/p38/NF-κB signaling pathway. Flavanone exhibits oral activity and antitumor efficacy.
    Flavanone (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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