1. Signaling Pathways
  2. NF-κB
  3. NF-κB

NF-κB

Nuclear factor-κB; Nuclear factor-kappaB

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.

Cat. No. Product Name Effect Purity Chemical Structure
  • HY-N8290
    Lactupicrin
    Inhibitor 99.97%
    Lactupicrin (Lactucopicrin) exhibits analgesic, sedative, antimalarial activities and atheroprotective effect. Lactupicrin inhibits acetylcholinesterase (AChE) with an IC50 of 150.3 μM. Lactupicrin is an orally active characteristic bitter sesquiterpene lactone.
    Lactupicrin
  • HY-N2132
    Flavokawain B
    Inhibitor 99.99%
    Flavokawain B (Flavokavain B) is an orally active chalcone. Flavokawain B results in activation of caspase-9, -3 and -8, cleavage of PARP. Flavokawain B down-regulates Bcl-2 with concomitant increase in Bax level. Flavokawain B inhibits NF-κB, PI3K/Akt and MAPK signaling pathway. Flavokawain B exhibits Apoptotic effects. Flavokawain B inhibits MMP-9 and promotes ROS generation. Flavokawain B inhibits multiple tumors and inflammation.
    Flavokawain B
  • HY-N6588
    3,4,5-Tricaffeoylquinic acid
    Inhibitor 98.71%
    3,4,5-Tricaffeoylquinic acid (3,4,5-triCQA) inhibits tumor necrosis factor-α-stimulated production of inflammatory mediators in keratinocytes via suppression of Akt- and NF-κB-pathways. 3,4,5-Tricaffeoylquinic acid induces cell cycle arrest at G0/G1, actin cytoskeleton organization, chromatin remodeling, neuronal differentiation, and bone morphogenetic protein signaling in human neural stem cells. 3,4,5-Tricaffeoylquinic acid has the potential for the research of aging-associated diseases.
    3,4,5-Tricaffeoylquinic acid
  • HY-N0802
    Tenuigenin
    Inhibitor 99.24%
    Tenuigenin is a major active component isolated from the root of the Chinese herb Polygala tenuifolia. Tenuigenin protects against S.aureus-induced pneumonia by inhibiting NF-κB activation. Tenuigenin has anti-inflammatory effect.
    Tenuigenin
  • HY-N0758
    Barlerin
    99.82%
    Barlerin (8-O-Acetyl shanzhiside methyl ester) is an iridoid glucoside isolated from the leaves of Lamiophlomis rotata Kudo, a Chinese folk medicinal plant in Xi-zang. Barlerin (8-O-Acetyl shanzhiside methyl ester) could inhibt NF-κB.
    Barlerin
  • HY-W012732
    Isoquinoline
    Inhibitor 99.66%
    Isoquinoline is an analog of pyridine. Isoquinoline-based alkaloids, such as p-tolyl bisisoquinoline, phthaloyl isoquinoline, and naphthyl isoquinoline, exhibit anticancer activity. Berberine, an isoquinoline alkaloid, exerts anti-inflammatory effects in diabetic mice by downregulating the gene expression ratios of pro-/anti-inflammatory and Th1/Th2 cytokines. Additionally, some isoquinoline-based compounds also possess antidepressant, antibacterial, antimalarial, and anti-HIV activities.
    Isoquinoline
  • HY-N1198
    Strictosamide
    Inhibitor 99.98%
    Strictosamide is a compound that can be isolated from Nauclea officinalis. Strictosamide has various activities such as anti-inflammatory, analgesic, anti-Plasmodium, antifungal, and promoting wound healing.
    Strictosamide
  • HY-153368
    Zomiradomide
    Inhibitor
    Zomiradomide is an orally active PROTAC degrader for IRAK4 (DC50=6 nM), thereby inhibiting the NF-κB signaling pathway. Zomiradomide acts also as a molecular glue, recruiting Ikaros and Aiolos, and mediating their degradation (DC50 for Ikaros is 1 nM), thereby activating the type I IFN signaling pathway. (Pink: target protein ligand PROTAC IRAK4 ligand-5 (HY-168311), Blue: E3 ligase ligand Thalidomide-4-Br (HY-W039116), Black: linker (HY-168313))
    Zomiradomide
  • HY-W089835
    Sodium taurodeoxycholate hydrate
    Inhibitor
    Sodium taurodeoxycholate hydrate is a bile salt-related anionic detergent. Sodium taurodeoxycholate hydrate is formed in the liver by conjugation of deoxycholate with Taurine (HY-B0351). Sodium taurodeoxycholate hydrate is used for isolation of membrane proteins including inner mitochondrial membrane proteins. Taurodeoxycholate-d6 (TDCA) exhibits anti-inflammatory and neuroprotective effects.
    Sodium taurodeoxycholate hydrate
  • HY-Y1117
    Melamine
    Activator 99.17%
    Melamine is an orally active inducer of Apoptosis. Melamine induces animal disease models. Melamine affects the activity of Sertoli cell and can be used for research on male reproductive function. Melamine also has neurotoxicity and nephrotoxicity. Melamine induces cognitive impairment and acute kidney injury models. Melamine can also be used to induce bladder cancer and urinary stone models.
    Melamine
  • HY-B0380A
    Trimebutine maleate
    Inhibitor 99.91%
    Trimebutine maleate is a multi-target inhibitor and opioid receptor agonist with antimuscarinic activity. Trimebutine maleate inhibits L-type Ca2+ channels and large-conductance calcium-activated potassium channels (BKCa channels), thereby inhibiting extracellular calcium influx and potassium ion efflux. Trimebutine maleate also targets Toll-like receptors, inhibits Toll-like receptor 2/4/7/8/9 signals, and inhibits LPS-induced IRAK1 activation, as well as ERK1/2, JNK and NF-κB activation, thereby exerting anti-inflammatory effects. Trimebutine maleate also induces tumor cell apoptosis by inhibiting the AKT/ERK pathway. Trimebutine maleate also inhibits excessive contraction of smooth muscle and can be used in the study of gastrointestinal disorders such as irritable bowel syndrome (IBS).
    Trimebutine maleate
  • HY-125911
    Gossypin
    Inhibitor 98.04%
    Gossypin is an orally active flavone isolated from Hibiscus vitifolius. Gossypin has antioxidant, antiinflammatory, anticancer, anticataract, antidiabetic, and hepatoprotective activities. Gossypin inhibits NF-κB and NF-κB-regulated gene expression. Gossypin inhibits AURKA and RSK2. Gossypin inhibits invasion and induces apoptosis. Gossypin can be used for gastric cancer study.
    Gossypin
  • HY-152177
    JS6
    Inhibitor 99.67%
    JS6 is a Bcl3 inhibitor, and inhibits Bcl3-NF-kB1 binding. JS6 inhibits tumor cell growth in vitro and in vivo.
    JS6
  • HY-133708
    β-Glucogallin
    Inhibitor 99.82%
    β-Glucogallin is an orally active and selective aldose reductase (AKR1B1) inhibitor with an IC50 value of 58 μM when using Glyceraldehyde (HY-128748) as AKR1B1 substrate. β-Glucogallin reduces ROS, PDGF, RAGE, and NF-κB. β-Glucogallin increases SOD. β-Glucogallin has antioxidant and hepatoprotective effects. β-Glucogallin can be used in retinal research.
    β-Glucogallin
  • HY-124670
    1beta-Hydroxyalantolactone
    Inhibitor 98.86%
    1beta-Hydroxyalantolactone modulate many processes that influence inflammatory reactions.
    1beta-Hydroxyalantolactone
  • HY-N4110
    Friedelin
    Inhibitor ≥99.0%
    Friedelin is derived from the leaves of Maytenus ilicifolia (Mart). Friedelin is an orally active non-competitive inhibitor of CYP3A4, with IC50 and Ki values of 10.79 μM and 6.16 μM, respectively. Friedelin is also a competitive inhibitor of CYP2E1, with IC50 and Ki values of 22.54 μM and 18.02 μM, respectively. Friedelin can be used in research related to inflammation, neurological diseases, and metabolic disorders.
    Friedelin
  • HY-N0460
    1-Caffeoylquinic acid
    Inhibitor 99.06%
    1-Caffeoylquinic acid is an effective NF-κB inhibitor, shows significant binding affinity to the RH domain of p105 with Ki of 0.007 μM. 1-Caffeoylquinic acid has anti-oxidative stress ability. 1-Caffeoylquinic acid is the Inhibitor for PD-1/PD-L1.
    1-Caffeoylquinic acid
  • HY-N7128
    Flavanone
    Inhibitor 99.84%
    Flavanone is a naturally occurring flavone. Flavanone has inhibitory activity for human estrogen synthetase (aromatase). Flavanone is the inhibitor for ERK/p38/NF-κB signaling pathway. Flavanone exhibits oral activity and antitumor efficacy.
    Flavanone
  • HY-105935
    Keracyanin chloride
    Inhibitor 99.90%
    Keracyanin chloride inhibits NF-κB/FAK/MAPK signaling pathway. Keracyanin chloride exhibits antioxidant, anti-inflammatory and hypoglycemic effects, and is orally active.
    Keracyanin chloride
  • HY-12286
    PI-1840
    Inhibitor 98.78%
    PI-1840 is a potent and selective chymotrypsin-like (CT-L) inhibitor for with an IC50 value of 27 nM. PI-1840 inhibits cell proliferation and arrest cell cycle at G2/M phase. PI-1840 induces apoptosis and induces autophagy. PI-1840 induces the accumulation of proteasome substrates p27, Bax, and IκB-α.
    PI-1840
Cat. No. Product Name / Synonyms Application Reactivity

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.

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