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-N0589R
    Dehydrodiisoeugenol (Standard)
    Inhibitor
    Dehydrodiisoeugenol (Standard) is the analytical standard of Dehydrodiisoeugenol (HY-N0589). This product is intended for research and analytical applications. Dehydrodiisoeugenol is an orally active anti-inflammatory and anti-tumor agent. Dehydrodiisoeugenol inhibits the proliferation of colorectal cancer cells, and induces apoptosis, autophagy, endoplasmic reticulum stress and cell cycle arrest. Dehydrodiisoeugenol also exerts anti-inflammatory effects by inhibiting the activation of NF-κB and the expression of COX-2. Dehydrodiisoeugenol can be used in the research related to colorectal cancer, inflammatory diseases and ulcerative colitis.
    Dehydrodiisoeugenol (Standard)
  • HY-135317F
    Emavusertib phosphate
    Inhibitor
    Emavusertib phosphate (CA-4948 phosphate) is the phosphate salt form of Emavusertib (HY-135317). Emavusertib phosphate is an orally active inhibitor for IRAK4 (IC50=57 nM) and FLT3. Emavusertib phosphate inhibits NF-κB and MyD88 signaling pathways, reduces the generation of pro-inflammatory cytokines like IL-6 and IL-10, thereby exhibiting anti-inflammatory and anti-proliferative activities against cancer cells, leading to cell apoptosis. Emavusertib phosphate exhibits antitumor activity in mouse model.
    Emavusertib phosphate
  • HY-W746544
    Nervonic acid-d18
    Inhibitor
    Nervonic acid-d18 (Selacholeic acid-d18) is the deuterium labeled Nervonic acid (HY-N2526). Nervonic acid is a monounsaturated fatty acid with oral activity. Nervonic acid exerts anti-inflammatory activity by inhibiting NF-κB signaling. Nervonic acid can be used in the study of neurodegenerative diseases.
    Nervonic acid-d<sub>18</sub>
  • HY-N2481R
    Oroxylin A-7-O-glucuronide (Standard)
    Inhibitor
    Oroxylin A-7-O-glucuronide (Standard) is the analytical standard of Oroxylin A-7-O-glucuronide (HY-N2481). This product is intended for research and analytical applications. Oroxylin A-7-O-glucuronide (oroxyloside) is an orally active flavonoid glucuronide and metabolite of Oroxylin A (HY-N0560). Oroxylin A-7-O-glucuronide can be extracted from the dried root of Scutellaria baicalensis. Oroxylin A-7-O-glucuronide exhibits prolyl oligopeptidase inhibitory activity. Oroxylin A-7-O-glucuronide inhibits the JNK pathway, upregulates PPARγ, and inhibits NF-κB p65 nuclear translocation. Oroxylin A-7-O-glucuronide reduces cytokine (IL-1β, IL-6) production. Oroxylin A-7-O-glucuronide exhibits anti-angiogenic, anti-tumor (glioma, liver cancer), anti-inflammatory, and hepatoprotective activities.
    Oroxylin A-7-O-glucuronide (Standard)
  • HY-107632G
    GYY4137 (GMP)
    Inhibitor
    GYY4137 (GMP) is the GMP-grade version of GYY4137 (HY-107632). Small molecules of GMP grade can be used as adjuvant reagents in cell therapy. GYY4137 (GMP) is a sustained-release H2S donor possessing vasodilatory, antihypertensive, and anti-inflammatory activities. GYY4137 (GMP) can inhibit cell growth, induce apoptosis, and cause cell cycle arrest by blocking the STAT3 pathway, demonstrating potent anticancer activity.
    GYY4137 (GMP)
  • HY-B1026R
    Adelmidrol (Standard)
    Inhibitor
    Adelmidrol (Standard) is the analytical standard of Adelmidrol. This product is intended for research and analytical applications. Adelmidrol exerts important anti-inflammatory effects that are partly dependent on PPARγ. Adelmidrol reduces NF-κB translocation, and COX-2 expression.
    Adelmidrol (Standard)
  • HY-N3548
    Catalpalactone
    Inhibitor
    Catalpalactone has anti-inflammatory effect. Catalpalactone inhibits LPS-induced NO production and iNOS expression in RAW264.7 cells, and also inhibits IRF3, NF-κB, and IFN-β/STAT-1 activation. Catalpalactone also inhibits dopamine biosynthesis by reducing tyrosine hydroxylase (TH) and aromatic-l-amino acid decarboxylase (AADC) activities.
    Catalpalactone
  • HY-121246S
    Fluorofenidone-d3
    Inhibitor
    Fluorofenidone-d3 (AKF-PD-d3) is deuterium labeled Fluorofenidone (AKF-PD) (HY-121246). Fluorofenidone is an orally active compound with anti-fibrotic, antioxidant, and anti-inflammatory pharmacological effects. Fluorofenidone downregulates the expression of ACSL4, upregulates GPX4 expression and inhibits the NF-κB signaling pathway to alleviate inflammation and fibrosis. Fluorofenidone ameliorates cholestasis and fibrosis by inhibiting hepatic Erk/-Egr-1 signaling and Tgfβ1/Smad pathway in mice. Fluorofenidone demonstrates protective effects against chronic lung injury in mice. Fluorofenidone can be used for the study of chronic obstructive pulmonary disease (COPD), pulmonary interstitial fibrosis (PIF) and non-small cell lung cancer (NSCLC).
    Fluorofenidone-d<sub>3</sub>
  • HY-N0257R
    Epimedin A (Standard)
    Inhibitor
    Epimedin A (Standard) is the analytical standard of Epimedin A (HY-N0257). This product is intended for research and analytical applications. Epimedin A, one of the main flavonoid active components in Herba Epimedii, is orally active. Epimedin A can inhibit osteoclastogenesis, differentiation, and bone resorption. Epimedin A also possesses anti-inflammatory activity. Epimedin A can be used in the research of osteoporosis and inflammatory diseases.
    Epimedin A (Standard)
  • HY-N1193R
    Sulfuretin (Standard)
    Inhibitor
    Sulfuretin inhibits the inflammatory response by suppressing the NF-κB pathway. Sulfuretin can be used for the research of allergic airway inflammation. Sulfuretin reduces oxidative stress, platelet aggregation, and mutagenesis. Sulfuretin is a competitive and potent inhibitor of monophenolase and diphenolase activities with the IC50 of 13.64 μM.
    Sulfuretin (Standard)
  • HY-N9164
    Hecubine
    Inhibitor
    Hecubine is a monoterpene indole alkaloid found in Ervatamia ocinalis. Hecubine activates TREM2 expression, reduces LPS (HY-D1056)-stimulated inammatory cytokines (TNF-αIL-6IL-1β) overexpression, as well as suppresses the levels of TLR4-, MyD88-, MAPK/PI3K/AKT- and NF-κB-related proteins. Hecubin also exhibits antioxidative effect, reduces ROS production and activates of the Nrf2/HO-1 pathway. Hecubine rescues LPS-induced behavioral deficits in zebrash larvae. Hecubine can be used for the research of neural inflammation-associated central nervous system diseases.
    Hecubine
  • HY-B0185S
    N-Oxide Lidocaine-d10
    Inhibitor
    N-Oxide Lidocaine-d10 is the deuterium labeled Lidocaine. Lidocaine (Lignocaine) inhibits sodium channels involving complex voltage and using dependence. Lidocaine decreases growth, migration and invasion of gastric carcinoma cells via up-regulating miR-145 expression and further inactivation of MEK/ERK and NF-κB signaling pathways. Lidocaine is an amide derivative and has potential for the research of ventricular arrhythmia.
    N-Oxide Lidocaine-d<sub>10</sub>
  • HY-N7102R
    Ceftiofur (Standard)
    Inhibitor
    Ceftiofur (Standard) is the analytical standard of Ceftiofur (HY-N7102). This product is intended for research and analytical applications. Ceftiofur is a cell wall synthesis inhibitor that targets bacterial penicillin-binding proteins (PBPs) and has anti-inflammatory effects in endotoxemia. Ceftiofur exerts bactericidal effects by inhibiting the synthesis of bacterial cell wall peptidoglycan, leading to bacterial cell lysis. Ceftiofur also inhibits the activation of NF-κB and MAPKs, thereby reducing the secretion of pro-inflammatory cytokines such as TNF-α, IL-1β, and IL-6.
    Ceftiofur (Standard)
  • HY-101481R
    Flurbiprofen axetil (Standard)
    Inhibitor
    Flurbiprofen axetil (Standard) is the analytical standard of Flurbiprofen axetil. This product is intended for research and analytical applications. Flurbiprofen axetil is a non-selective COX inhibitor and a nonsteroidal anti-inflammatory agent with anti-inflammatory and analgesic effects. Flurbiprofen axetil inhibits basal-like breast cancer metastasis by inhibiting the MEK/ERK signaling pathway. Flurbiprofen axetil can promote neuroprotection after focal cerebral ischemia in rats by partially activating PPAR-γ. Flurbiprofen axetil alleviates cerebral ischemia/reperfusion injury by reducing inflammation in a transient global cerebral ischemia/reperfusion rat model. Flurbiprofen axetil can alleviate inflammatory responses and cognitive function in a mild cognitive impairment (MCI) SD rat model through the AMPKα/NF-κB signaling pathway.
    Flurbiprofen axetil (Standard)
  • HY-N0665R
    Specnuezhenide (Standard)
    Inhibitor
    Specnuezhenide (Standard) is the analytical standard of Specnuezhenide. This product is intended for research and analytical applications. Specnuezhenide ((8E)-Nuezhenide) is isolated from the fruits of?Ligustrum lucidum. Specnuezhenide ((8E)-Nuezhenide) can inhibit IL-1β-induced inflammation in chondrocytes via inhibition of NF-κB and wnt/β-catenin signaling. Specnuezhenide ((8E)-Nuezhenide) exerts anti-inflammatory effects in a rat model of osteoarthritis (OA).
    Specnuezhenide (Standard)
  • HY-N0436R
    Engeletin (Standard)
    Inhibitor
    Engeletin (Standard) is the analytical standard of Engeletin. This product is intended for research and analytical applications. Engeletin is a flavanonol glycoside isolated from Smilax glabra Roxb. , inhibits NF-κB signaling-pathway activation, and possesses anti-inflammatory, analgesic, diuresis, detumescence, and antibiosis effects.
    Engeletin (Standard)
  • HY-N0441R
    Neferine (Standard)
    Inhibitor
    Neferine (Standard) is the analytical standard of Neferine. This product is intended for research and analytical applications. Neferine is a major bisbenzylisoquinline alkaloid. Neferine strongly inhibits NF-κB activation.
    Neferine (Standard)
  • HY-W009338R
    H-Val-Tyr-OH (Standard)
    Inhibitor
    H-Val-Tyr-OH is an endogenous metabolite.
    H-Val-Tyr-OH (Standard)
  • HY-181079
    RANKL-IN-2
    Inhibitor
    RANKL-IN-2 is an orally active RANKL inhibitor with Kd values of 3.21 μM and 4.625 μM in the SPR and MST assays, respectively. RANKL-IN-2 binds to RANKL to interfere with RANKL-RANK interaction. RANKL-IN-2 suppresses osteoclastogenesis by inhibiting ROS, MAPK and NF-κB pathways. RANKL-IN-2 inhibits osteoclastogenesis via inhibition of RANKL-induced osteoclast formation, bone resorption, and osteoclast-specific gene and protein expressions in vitro.RANKL-IN-2 prevents bone loss in ovariectomized osteoporosis mice.RANKL-IN-2 can be used for the research of osteoporosis.
    RANKL-IN-2
  • HY-B0898S
    Ceftiofur-d3 sodium
    Inhibitor
    Ceftiofur-d3 sodium is deuterium labeled Ceftiofur sodium (HY-B0898). Ceftiofur sodium is a cell wall synthesis inhibitor that targets bacterial penicillin-binding proteins (PBPs) and has anti-inflammatory effects in endotoxemia. Ceftiofur sodium exerts bactericidal effects by inhibiting the synthesis of bacterial cell wall peptidoglycan, leading to bacterial cell lysis. Ceftiofur sodium also inhibits the activation of NF-κB and MAPKs, thereby reducing the secretion of pro-inflammatory cytokines such as TNF-α, IL-1β, and IL-6.
    Ceftiofur-d<sub>3</sub> sodium
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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