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-N0907
    Ginsenoside Rg6
    Inhibitor 99.87%
    Ginsenoside Rg6 inhibits TNF-α-induced NF-κB transcriptional activity with an IC50 of 29.34 μM in HepG2 cells. Ginsenoside Rg6 also exhibits apoptosis-inducing effect.
    Ginsenoside Rg6
  • HY-101402A
    Cyclo(his-pro) TFA
    Inhibitor 99.13%
    Cyclo(his-pro) TFA (Cyclo(histidyl-proline) TFA) is an orally active cyclic dipeptide structurally related to tyreotropin-releasing hormone. Cyclo(his-pro) TFA could inhibit NF-κB nuclear accumulation. Cyclo(his-pro) TFA can cross the brain-blood-barrier and affect diverse inflammatory and stress responses.
    Cyclo(his-pro) TFA
  • HY-N1198
    Strictosamide
    Inhibitor 99.94%
    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-12383
    Pelubiprofen
    Inhibitor 98.46%
    Pelubiprofen is an orally active anti-inflammatory agent that inhibits COX enzyme activity (with IC50 values of 10.66 and 2.88 μM for COX-1 and COX-2, respectively). Pelubiprofen has significant anti-inflammatory and analgesic effects.
    Pelubiprofen
  • HY-W001023
    5-Amino-8-hydroxyquinoline
    Inhibitor
    5-Amino-8-hydroxyquinoline (5A8HQ; 5AHQ) is an orally active non-competitive 20S proteasome inhibitor. 5-Amino-8-hydroxyquinoline can inhibit NF-κB activity and induce cancer cells death and shows low cytotoxicity towards normal hematopoietic cells. 5-Amino-8-hydroxyquinoline can be used for the research of cancer, such as leukemia.
    5-Amino-8-hydroxyquinoline
  • HY-W011849
    Phenyl β-D-glucopyranoside
    Inhibitor 99.85%
    Phenyl β-D-glucopyranoside is a component isolated from Phellodendron amurense, which has anti-inflammatory and anti-tumor activities. Phenyl β-D-glucopyranoside inhibits nitric oxide (NO) production, and the expression of iNOS and COX-2. Phenyl β-D-glucopyranoside also inhibits the nuclear translocation of NF-κB. Phenyl β-D-glucopyranoside inhibits the expression of pro-inflammatory cytokines and related genes.
    Phenyl β-D-glucopyranoside
  • HY-N0307
    Ciwujianoside B
    Inhibitor 99.68%
    Ciwujianoside B is an orally active, blood-brain barrier penetrable radioprotective agent and memory enhancer. Ciwujianoside B reduces radiation-induced DNA damage, cell cycle arrest and apoptosis, downregulates NF-κB and the Bax/Bcl-2 ratio, and enhances the proliferative capacity of bone marrow cells. Ciwujianoside B enhances object recognition memory in normal mice and induces dendritic extension in primary cultured cortical neurons. Ciwujianoside B can be used in studies related to hematopoietic system radiation injury and memory enhancement.
    Ciwujianoside B
  • HY-173414
    PROTAC STING degrader-3
    Inhibitor 98.35%
    PROTAC STING degrader-3 is a STING PROTAC degrader (DC50: 0.62 μM). PROTAC STING degrader-3 induces STING degradation via the ubiquitin-proteasome pathway. PROTAC STING degrader-3 exerts anti-inflammatory effects by inhibiting STING/TBK1/NF-κB signaling. PROTAC STING degrader-3 has renal protective effects and can be used in the study of acute kidney injury (AKI).
    PROTAC STING degrader-3
  • HY-N0141R
    Parthenolide (Standard)
    Inhibitor
    Parthenolide (Standard) is the analytical standard of Parthenolide. This product is intended for research and analytical applications. Parthenolide is a sesquiterpene lactone found in the medicinal herb Feverfew. Parthenolide exhibits anti-inflammatory activity by inhibiting NF-κB activation; also inhibits HDAC1 protein without affecting other class I/II HDACs.
    Parthenolide (Standard)
  • HY-108292
    Propacetamol hydrochloride
    Inhibitor 99.74%
    Propacetamol hydrochloride is an orally active prodrug of paracetamol and an inducer of acute liver injury models, with multiple properties including antinociception, antioxidation and gastroprotection. Propacetamol hydrochloride potentiates Tramadol and attenuates Aspirin (HY-14654)-induced gastric mucosal damage and lipid peroxidation. Under specific conditions, Propacetamol hydrochloride also acts as a hepatotoxic inducer, triggering acute liver injury, oxidative stress and apoptosis, with strain differences in toxicity sensitivity. Propacetamol hydrochloride can be used in the research of acute liver injury, drug-induced hepatotoxicity and gastric mucosal damage.
    Propacetamol hydrochloride
  • HY-124670
    1beta-Hydroxyalantolactone
    Inhibitor 99.94%
    1beta-Hydroxyalantolactone modulate many processes that influence inflammatory reactions.
    1beta-Hydroxyalantolactone
  • HY-N1914R
    Ergothioneine (Standard)
    Inhibitor
    Delphinidin-3-O-galactoside (chloride) (Standard) is the analytical standard of Delphinidin-3-O-galactoside (chloride). This product is intended for research and analytical applications. Delphinidin-3-O-galactoside (chloride) is an anthocyanin that extracts from wheat flour. Delphinidin-3-O-galactoside (chloride) can be used for the research of antioxidant and antimicrobial.
    Ergothioneine (Standard)
  • HY-N2101
    Benzoyloxypaeoniflorin
    Inhibitor 98.60%
    Benzoyloxypaeoniflorin, isolated from the root of Paeonia suffruticosa, is a tyrosinase inhibitor against mushroom tyrosinase with IC50 of 0.453 mM. Benzoyloxypaeoniflorin is NF-κB Inhibitor and contributes to improving blood circulation through its inhibitory effect on both platelet aggregation and blood coagulation.
    Benzoyloxypaeoniflorin
  • HY-157331
    DCZ5418
    Inhibitor 99.02%
    DCZ5418 is an inhibitor of TRIP13. DCZ5418 has anti-multiple myeloma activity in vitro and in vivo.
    DCZ5418
  • HY-B0678
    Metaxalone
    Inhibitor 99.77%
    Metaxalone (AHR438; NSC170959) is an FDA-approved muscle relaxant. Metaxalone acts mainly on the central nervous system and achieves muscle relaxation by inhibiting polysynaptic reflex arcs. In addition, Metaxalone is an inhibitor of MAO-A, which has anti-inflammatory and antioxidant effects. Metaxalone inhibits IL-1β-induced inflammatory phenotype, modulates NF-κB and other related signaling pathways, and decreases MAO-A expression and activity in IL-1β-treated microglia.
    Metaxalone
  • HY-B0289
    Erdosteine
    Inhibitor 99.54%
    Erdosteine inhibits lipopolysaccharide (LPS)-induced NF-κB activation. Erdosteine has muco-modulatory, anti-bacterial, anti-inflammatory and anti-oxidant effects.
    Erdosteine
  • HY-W011474R
    Geranylgeraniol (Standard)
    Inhibitor
    Geranylgeraniol (Standard) is the analytical standard of Geranylgeraniol. This product is intended for research and analytical applications. 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[4].
    Geranylgeraniol (Standard)
  • HY-N0510A
    Aristolochic acid A sodium
    Inhibitor 99.93%
    Aristolochic acid A (Aristolochic acid I) sodium is the main component of plant extract Aristolochic acids, which are found in various herbal plants of genus Aristolochia and Asarum. Aristolochic acid A sodium significantly reduces both activator protein 1 (AP-1) and NF-κB activities. Aristolochic acid A sodium reduces BLCAP gene expression in human cell lines.
    Aristolochic acid A sodium
  • HY-N0708R
    Vanillic acid (Standard)
    Inhibitor
    Vanillic acid (Standard) is the analytical standard of Vanillic acid. This product is intended for research and analytical applications. Vanillic acid is a flavoring agent found in edible plants and fruits, also found in Angelica sinensis. Vanillic acid inhibits NF-κB activation. Anti-inflammatory, antibacterial, and chemopreventive effects.
    Vanillic acid (Standard)
  • HY-B1773AS3
    Sodium propionate-13C3
    Inhibitor 99.45%
    Sodium propionate-13C-3 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>3</sub>
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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