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-N0587
    Demethylzeylasteral
    		Inhibitor 99.92%
    Demethylzeylasteral is an orally active triterpenoid compound isolated from Tripterygium wilfordii, which has functions such as anti-inflammatory, anti-tumor, anti fertility, estrogen metabolism regulation, immune suppression, and immune system regulation [1][2].
    Demethylzeylasteral
  • HY-15122A
    Sinomenine hydrochloride
    		Inhibitor 98.67%
    Sinomenine hydrochloride (Cucoline hydrochloride), an alkaloid extracted from Sinomenium acutum, is a blocker of the NF-κB activation. Sinomenine also is an activator of μ-opioid receptor.
    Sinomenine hydrochloride
  • HY-B0008
    Sulindac
    		Inhibitor 99.81%
    Sulindac (MK-231) is an orally active nonsteroidal anti-inflammatory agent. Sulindac also is an immunomodulatory agent. Sulindac can be used for the research of arthritis of the spine, gouty arthritis and kinds of cancer including colorectal cancer (CRC) and lung cancer.
    Sulindac
  • HY-N0787
    Cryptochlorogenic acid
    		Inhibitor 99.87%
    Cryptochlorogenic acid (4-Caffeoylquinic acid) is a naturally occurring phenolic acid compound with oral effectiveness, anti-inflammatory, antioxidant and anti-cardiac hypertrophy effects. Alleviating LPS (HY-D1056) and ISO (HY-B0468) by regulating proinflammatory factor expression, inhibiting NF-κB activity, promoting Nrf2 nuclear transfer, and regulating PI3Kα/Akt/ mTOR / HIF-1α signaling pathway Induced physiological stress response.
    Cryptochlorogenic acid
  • HY-19357
    E3330
    		Inhibitor 99.34%
    E3330 (APX-3330) is a direct, orally active and selective inhibitor of Ape-1 (apurinic/apyrimidinic endonuclease 1)/Ref-1 (redox factor-1) redox. E3330 is able to impair tumor growth and blocks the activity of NF-κB, AP-1, and HIF-1α in pancreatic cancer. E3330 shows anticancer activities.
    E3330
  • HY-N2515
    Ginsenoside Rk1
    		Inhibitor 99.90%
    Ginsenoside Rk1 is a unique component created by processing the ginseng plant (mainly Sung Ginseng, SG) at high temperatures. Ginsenoside Rk1 has anti-inflammatory effect, suppresses the activation of Jak2/Stat3 signaling pathway and NF-κB. Ginsenoside Rk1 has anti-tumor effect, antiplatelet aggregation activities, anti-insulin resistance, nephroprotective effect, antimicrobial effect, cognitive function enhancement, lipid accumulation reduction and prevents osteoporosis. Ginsenoside Rk1 induces cell apoptosis by triggering intracellular reactive oxygen species (ROS) generation and blocking PI3K/Akt pathway.
    Ginsenoside Rk1
  • HY-N0492
    α-Lipoic Acid
    		Inhibitor 99.86%
    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-17473
    Embelin
    		Inhibitor 98.75%
    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
  • HY-126307
    Urolithin B
    		Inhibitor 99.62%
    Urolithin B is one of Ellagitannins' slow microbial products, and has anti-inflammatory and anti-inflammatory effects. Urolithin B suppresses NF-κB activity. Urolithin B suppresses JNK, ERK and Akt's oxidation, and increases AMPK's oxidation. Urolithin B is also a quantitative change factor for bone and skin quality.
    Urolithin B
  • HY-N0375
    18α-Glycyrrhetinic acid
    		Inhibitor 99.52%
    18α-Glycyrrhetinic acid, a diet-derived compound, is an inhibitor of NF-kB and an activator of proteasome, which serves as pro-longevity and anti-aggregation factor in a multicellular organism. 18α-Glycyrrhetinic acid induces apoptosis.
    18α-Glycyrrhetinic acid
  • HY-P9958
    Denosumab
    		Inhibitor 99.10%
    Denosumab is a human monoclonal antibody that targets the protein RANKL. Denosumab binds to the receptor activator of nuclear factor kappa-B ligand (RANKL) and prevents its binding to the RANK receptor (KD of 0.003 nM for human RANKL). Denosumab promotes proliferation and spermatogenesis. Denosumab prevents bone resorption through inhibition of the NF-κB pathway. Denosumab can be used in bone-related studies.
    Denosumab
  • HY-N0441
    Neferine
    		Inhibitor 99.92%
    Neferine is a major bisbenzylisoquinline alkaloid. Neferine strongly inhibits NF-κB activation.
    Neferine
  • HY-130603
    DCZ0415
    		Inhibitor 99.77%
    DCZ0415, a potent TRIP13 inhibitor, impairs nonhomologous end joining repair and inhibits NF-κB activity. DCZ0415 induces anti-myeloma activity in vitro, in vivo, and in primary cells derived from drug-resistant myeloma patients.
    DCZ0415
  • HY-N0279
    Cardamonin
    		Inhibitor 98.38%
    Cardamonin can be found from cardamom, and target various signaling molecules, transcriptional factors, cytokines and enzymes. Cardamonin can inhibit mTOR, NF-κB, Akt, STAT3, Wnt/β-catenin and COX-2. Cardamonin shows anticancer, anti-inflammatory, antimicrobial and antidiabetic activities.
    Cardamonin
  • HY-N0773
    Isovitexin
    		Inhibitor 99.82%
    Isovitexin is a flavonoid isolated from passion flower, Cannabis and, and the palm, possesses anti-inflammatory and anti-oxidant activities; Isovitexin acts like a JNK1/2 inhibitor and inhibits the activation of NF-κB.
    Isovitexin
  • HY-Y1362
    Ethyl pyruvate
    		Inhibitor 99.87%
    Ethyl pyruvate is a simple derivative of the endogenous metabolite pyruvate. Ethyl pyruvate is an HMGB1 release inhibitor. Ethyl pyruvate can induce apoptosis by autophagy. Ethyl pyruvate has anti-inflammatory, antioxidant and anti-tumor activity. Ethyl pyruvate can be used in the study of neurodegenerative diseases such as Alzheimer's and Parkinson's disease.
    Ethyl pyruvate
  • HY-N0509
    Astilbin
    		Inhibitor 99.97%
    Astilbin is a flavonoid compound and enhances NRF2 activation. Astilbin also suppresses TNF-α expression and NF-κB activation.
    Astilbin
  • HY-100507
    Avadomide
    		Inhibitor 99.14%
    Avadomide is an orally active cereblon modulator. Avadomide modulates cereblon E3 ligase activity, inhibits NF-κB pathway, arrests the cell cycle at G1 phase, and thus induces apoptosis in cancer cell PDAC. Avadomide exhibits potent antitumor and immunomodulatory activities.
    Avadomide
  • HY-128853
    Taurodeoxycholate sodium salt
    		Inhibitor 99.80%
    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.
    Taurodeoxycholate sodium salt
  • HY-W050154
    Kojic acid
    		Inhibitor 99.99%
    Kojic acid is a substance produced by Aspergillus oryzae that is orally effective and can also be absorbed transdermally. Kojic acid exhibits various biological activities, including anti-aging, anti-nematode, antimicrobial, antioxidant, and anti-inflammatory effects. Kojic acid is a Tyrosinase inhibitor with an Mushroom Tyrosinase IC50 of 182.7 μM. Kojic acid prevents melanin production by capturing copper ions that bind to the tyrosinase active site, thus inhibiting its activation. Kojic acid also suppresses the NF-κB and p21 signaling pathways in human keratinocytes. Kojic acid derivatives have anticancer activity.
    Kojic acid
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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