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-N0773R
    Isovitexin (Standard)
    Inhibitor
    Isovitexin (Standard) is the analytical standard of Isovitexin. This product is intended for research and analytical applications. 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 (Standard)
  • HY-W001174R
    2,5-Dihydroxyacetophenone (Standard)
    Inhibitor
    2,5-Dihydroxyacetophenone, isolated from Rehmannia glutinosa, inhibits the production of inflammatory mediators in activated macrophages by blocking the ERK1/2 and NF-κB signaling pathways.
    2,5-Dihydroxyacetophenone (Standard)
  • 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-173388
    TLR4-IN-2
    Inhibitor
    TLR4-IN-2 (Compound Racemic-11k) is inhibitors of TLR4, JNK, and NF-κB. TLR4-IN-2 inhibits NO production in LPS-stimulated RAW264.7 cells with an IC50 value of 23.2 µM. TLR4-IN-2 exerts anti-inflammatory activity by inhibiting TLR4 expression, reducing JNK phosphorylation, thereby suppressing the activation of NF-κB, blocking the transcription of inflammation-related genes, reducing the expression of iNOS and COX-2, and decreasing the production of inflammatory mediators such as NO, PGE 2, and TNF-α. TLR4-IN-2 is promising for research of inflammatory diseases, such as rheumatoid arthritis and various inflammatory disorders.
    TLR4-IN-2
  • HY-N2106R
    Dehydroevodiamine (Standard)
    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 (Standard)
  • HY-N2192R
    Swertianolin (Standard)
    Inhibitor
    Swertianolin (Standard) is the analytical standard of Swertianolin (HY-N2192). This product is intended for research and analytical applications. Swertianolin is a xanthone glycoside. Swertianolin can be isolated from plants of the Gentianaceae family (e.g., Gentiana campestris and Swertia punicea). Swertianolin inhibits p38 phosphorylation and NF-κB activation, and reduces NO and ROS production. Swertianolin exhibits anti-Helicobacter pylori activity with an IC50 of 6.1 μM and a minimum bactericidal concentration of 91.7 μM. Swertianolin modulates immune function in sepsis. Swertianolin is useful in the research of diseases such as Alzheimer's disease, hepatitis B, Helicobacter pylori infection, and sepsis.
    Swertianolin (Standard)
  • HY-W014223R
    2,4′-Dihydroxybenzophenone (Standard)
    Inhibitor
    2,4′-Dihydroxybenzophenone (Standard) is the analytical standard of 2,4′-Dihydroxybenzophenone. This product is intended for research and analytical applications. 2,4′-Dihydroxybenzophenone (Ultraviolet absorber UV-0) occupies the hydrophobic pocket of MD2 and blocks the dimerization of TLR4. 2,4′-Dihydroxybenzophenone inhibits the LPS induced mtROS production, and LPS induced inflammatory response by downregulating pro-inflammatory mediators and decreasing the expression of MyD88, p-IRAK4, and NF-κB. 2,4′-Dihydroxybenzophenone is also a UV absorber.
    2,4′-Dihydroxybenzophenone (Standard)
  • HY-164480
    GTCpFE
    Inhibitor
    GTCpFE inhibits IKKα/β in the NF-κB pathway with anti-inflammatory activities and blocks p65 nuclear entry, which consists of Dimethyl fumarate (DMF) (HY-17363) linked to Aspirin (ASA) (HY-14654). GTCpFE exhibits selective anti-cancer stem-like cell (CSC) activity by reducing mammosphere growth and the CD44+ CD24- immunophenotype. GTCpFE inhibits breast cancer stem cells, an important NFκB- and PGE2-dependent phenotype in aggressive cancers.
    GTCpFE
  • HY-N15415
    Zaluzanin C
    Inhibitor
    Zaluzanin C is a sesquiterpene lactone. Zaluzanin C has anti-inflammatory activity and can inhibit the production of mtROS, block the NF-κB signaling pathway, and reduce the production of TNF-α. In addition, Zaluzanin C can inhibit the differentiation of 3T3-L1 preadipocytes into mature adipocytes.
    Zaluzanin C
  • HY-N0648R
    Monotropein (Standard)
    Inhibitor
    Monotropein (Standard) is the analytical standard of Monotropein. This product is intended for research and analytical applications. Monotropein is an iridoid glycoside that can be isolated from the roots of Morinda officinalis. Monotropein inhibits the expression of inflammatory mediators in dextran sulfate sodium (DSS)-induced colitis mouse model. Monotropein exerts protective effects against IL-1β-induced apoptosis and catabolic responses on osteoarthritis chondrocytes. Monotropein has cartilage protective activity. Monotropein can alleviate Cisplatin (HY-17394)-induced acute kidney injury by inhibiting oxidative damage, inflammation and apoptosis through activation of Nrf2/HO-1 pathway and inhibition of NF-κB signaling. Monotropein can be studied in research for osteoarthritis, acute kidney injury and acute lung injury.
    Monotropein (Standard)
  • HY-N2065R
    Withaferin A (Standard)
    Inhibitor
    Withaferin A (Standard) is the analytical standard of Withaferin A. This product is intended for research and analytical applications. Withaferin A is a steroidal lactone isolated from Withania somnifera, inhibits NF-kB activation and targets vimentin, with potent antiinflammatory and anticancer activities. Withaferin A is an inhibitor of endothelial protein C receptor (EPCR) shedding.
    Withaferin A (Standard)
  • HY-126382R
    Hesperidin methylchalcone (Standard)
    Inhibitor
    Hesperidin methylchalcone (Standard) is the analytical standard of Hesperidin methylchalcone. This product is intended for research and analytical applications. Hesperidin methylchalcone (Hesperidin methyl chalcone) is an orally active flavonoid that has analgesic, anti-inflammatory and antioxidant properties. Hesperidin methylchalcone exhibits vasoprotective activity. Hesperidin methylchalcone inhibits oxidative stress, cytokine production and NF-κB activation. Hesperidin methylchalcone can be used for the research of gout disease.
    Hesperidin methylchalcone (Standard)
  • HY-109017R
    Vamorolone (Standard)
    Inhibitor
    Vamorolone (Standard) is the analytical standard of Vamorolone. This product is intended for research and analytical applications.
    Vamorolone (Standard)
  • HY-N1508R
    Ecliptasaponin A (Standard)
    Inhibitor
    Ecliptasaponin A (Standard) is the analytical standard for Ecliptasaponin A (HY-N1508). Ecliptasaponin A is an orally active pentacyclic triterpenoid saponin. Ecliptasaponin A exerts anti-tumor activity by activating ASK1/JNK pathway, inducing apoptosis and autophagy in lung cancer cells. Ecliptasaponin A exerts anti-inflammatory/anti-fibrotic effects and protects the cardiovascular system by inhibiting the HMGB1/TLR4/NF-κB pathway, and the expression of COX-2 and MMP-9. Ecliptasaponin A can enhance SOD activity, reduce MDA levels, and alleviate oxidative stress damage. Ecliptasaponin A exerts chondroprotective effects by inhibiting the expression of MMP13 and regulating inflammatory factors. Ecliptasaponin A improves ovarian function and regulates sex hormones by upregulating the expression of ESR1 receptors.
    Ecliptasaponin A (Standard)
  • HY-14655S1
    Sulfasalazine-d3,15N
    Inhibitor
    Sulfasalazine-d3,15N is 15N and deuterated labeled Sulfasalazine (HY-14655). 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-d<sub>3</sub>,<sup>15</sup>N
  • HY-107818R
    4-Hydroxychalcone (Standard)
    Inhibitor
    4-Hydroxychalcone (Standard) is the analytical standard of 4-Hydroxychalcone. This product is intended for research and analytical applications. 4-Hydroxychalcone is a chalcone metabolite with anti-angiogenic and anti-inflammatory activities. 4-Hydroxychalcone suppresses angiogenesis by suppression of growth factor pathway with no signs of cytotoxicity. 4-Hydroxychalcone inhibits TNF-α induced NF-κB pathway activation and activates BMP signaling, reduces resistant hypertension (RH) by attenuating hyperaldosteronism and renal injury in mice.
    4-Hydroxychalcone (Standard)
  • HY-N2485R
    4'-Methoxyresveratrol (Standard)
    Inhibitor
    4'-Methoxyresveratrol (Standard) is the analytical standard of 4'-Methoxyresveratrol. This product is intended for research and analytical applications. 4'-Methoxyresveratrol (4'-O-Methylresveratrol) is a polyphenol derived from Dipterocarpaceae, with antiandrogenic, antifungal and anti-inflammatory activities. 4'-Methoxyresveratrol alleviates AGE-induced inflammation through suppressing RAGE-mediated MAPK/NF-κB signaling pathway and NLRP3 inflammasome activation.
    4'-Methoxyresveratrol (Standard)
  • HY-B0612AR
    Lercanidipine hydrochloride (Standard)
    Inhibitor
    Lercanidipine (hydrochloride) (Standard) is the analytical standard of Lercanidipine (hydrochloride). This product is intended for research and analytical applications. Lercanidipine is a third-generation, lipophilic, brain-penetrant, vascular-selective and orally active dihydropyridine-calcium channel blocker with a pIC50 of 7.74 (converts from μM). Lercanidipine has long lasting antihypertensive action as well as reno- and neuro-protective effect. Lercanidipine also shows anti-oxidant, anti-inflammatory and anti-apoptotic properties. Lercanidipine can be used in cardiovascular and neurological research.
    Lercanidipine hydrochloride (Standard)
  • HY-164524
    SBI-0640726
    Inhibitor
    SBI-0640726 is an eIF4G1 inhibitor with antiproliferative activity in melanoma. SBI-0640726 disrupts the eIF4F translation initiation complex by inhibiting AKT and NF-kB signaling pathways. SBI-0640726 inhibits the growth of NRAS and BRAF mutant melanoma in vitro.
    SBI-0640726
  • HY-108065
    3'-Sialyllactose
    Inhibitor
    3'-Sialyllactose (3'-SL) is a prebiotic, maintains immune homeostasis and exerts anti-inflammatory and anti-arthritic effects. 3'-Sialyllactose is an ordinary carbohydrate with the lowest toxicity rating, it can be used for the research of inflammation.
    3'-Sialyllactose
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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