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-N0811
    Anemarsaponin B
    Inhibitor 99.43%
    Anemarsaponin B is a steroidal saponin. Anemarsaponin B decreases the protein and mRNA levels of iNOS and COX-2. Anemarsaponin B reduces the expressions and productions of pro-inflammatory cytokines, including TNF-a and IL-6. Anemarsaponin B inhibits the nuclear translocation of the p65 subunit of NF-κB by blocking the phosphorylation of IκBα. Anemarsaponin B also inhibits the phosphorylation of MAP kinase kinases 3/6 (MKK3/6) and mixed lineage kinase 3 (MLK3). Anti-inflammatory effect .
    Anemarsaponin B
  • HY-154860
    PTD10
    Inhibitor
    PTD10 is a selective and potent BTK PROTAC degrader (DC50 = 0.5 nM, KD = 2.28 nM). PTD10 can recruit cereblon (CRBN) E3 ligase and form a ternary complex with BTK, thereby mediating the ubiquitination and proteasome-dependent degradation of BTK. PTD10 inhibits cancer cells proliferation, and induces cell apoptosis via activation of the caspase-dependent pathway and mitochondrial pathway. PTD10 potently inhibits the BCR, AKT and NF-κB signaling pathway. PTD10 can be used for researches of B-cell malignancies and autoimmune disease.
    PTD10
  • HY-N0039R
    Ginsenoside Rb1 (Standard)
    Inhibitor
    Ginsenoside Rb1 (Standard) is the analytical standard of Ginsenoside Rb1. This product is intended for research and analytical applications. Ginsenoside Rb1, a main constituent of the root of Panax ginseng, inhibits Na+, K+-ATPase activity with an IC50 of 6.3±1.0 μM. Ginsenoside also inhibits IRAK-1 activation and phosphorylation of NF-κB p65 .
    Ginsenoside Rb1 (Standard)
  • HY-RS11824
    Rel Mouse Pre-designed siRNA Set A
    Inhibitor

    Rel Mouse Pre-designed siRNA Set A contains three designed siRNAs for Rel gene (Mouse), as well as a negative control, a positive control, and a FAM-labeled negative control.

    Rel Mouse Pre-designed siRNA Set A
  • HY-177515
    IRAK4 modulator-2
    Inhibitor 99.86%
    IRAK4 modulator-2 (Compound 5) is a selective dual Interleukin-1 Receptor Associated Kinase 4 (IRAK4) and IRAK1 inhibitor with IC50 values of 0.005 μM and 0.97 μM, erespectively. IRAK4 modulator-2 blocks IRAK-mediated signaling pathways (e.g., JAK-STAT, NF-κB pathways), reduces the production of pro-inflammatory cytokines (e.g., IL-1, TNF), and exerts anti-inflammatory activity. IRAK4 modulator-2 is promising for research of autoimmune diseases and inflammatory diseases, such as rheumatoid arthritis, psoriasis, inflammatory bowel disease.
    IRAK4 modulator-2
  • HY-122961
    Dehydromiltirone
    Inhibitor 99.11%
    Dehydromiltirone (1,2-Didehydromiltirone) is a diterpenoid quinone with an anti-inflammatory effect. Dehydromiltirone prevents liver injury by modifying the MAPK and NF-κB signaling pathways, reducing neuroinflammatory responses, and inhibiting platelet aggregation. Dehydromiltirone can be used for osteoporosis research.
    Dehydromiltirone
  • HY-W342283
    Diminazene
    Inhibitor
    Diminazene is an antiparasitic agent widely used to treat parasitic diseases caused by hemoparasites (such as trypanosomes and babesia). Diminazene acts as an ACE2 activator and exerts cardiovascular protective effects by activating the ACE2/Ang-(1-7)/Mas receptor axis. By regulating gut microbiota-tryptophan metabolism, Diminazene inhibits the activation of core inflammatory signaling pathways including MAPK, STAT and NF-κB, increases central 5-HT levels, and suppresses splenic TNF-α production, thereby alleviating systemic inflammation.
    Diminazene
  • HY-116678A
    Cloricromen hydrochloride
    Inhibitor 99.82%
    Cloricromen (Cloricromene) hydrochloride is an orally active platelet inhibitor. Cloricromen hydrochloride inhibits thromboxane B2 release, β-thromboglobulin, and thrombus formation. Cloricromen hydrochloride inhibits LPS (HY-D1056)-induced NF-κB activation, oxidative activity, and TNF-α expression. Cloricromen hydrochloride exhibits protective activity in animal models of shock and peripheral ischaemia. Cloricromen hydrochloride can be used for the research of myocardial ischaemia/reperfusion injury, and ischaemic cerebrovascular disease.
    Cloricromen hydrochloride
  • HY-B0320AR
    Cromolyn disodium (Standard)
    Inhibitor
    Cromolyn disodium (Standard) (Cromoglycate disodium (Standard)) is the analytical standard of Cromolyn disodium (HY-B0320A). This product is intended for research and analytical applications. Cromolyn (Cromoglycate) disodium is an orally active GSK-3β inhibitor with an IC50 of 2.0 μM. Cromolyn disodium is also a mast cell stabilizer that can inhibit the release of mediators from mast cells, regulate reflex bronchoconstriction, and reduce non-specific bronchial hyperreactivity, and Cromolyn disodium can be used in the research of bronchial asthma. In addition, Cromolyn disodium has multiple activities such as anti-inflammatory, anti-allergic, anti-histamine, anti-cancer, and neuroprotective effects.
    Cromolyn disodium (Standard)
  • HY-147377
    N-Salicyloyltryptamine
    Inhibitor
    N-Salicyloyltryptamine acts on voltage-dependent Na+, Ca2+, and K+ ion channels inhibitor. N-Salicyloyltryptamine inhibits K+ currents with an IC50 value of 34.6 μM (Ito). N-Salicyloyltryptamine also exhibits anticonvulsant, anti-inflammatory, analgesic, and vasorelaxation effect-.
    N-Salicyloyltryptamine
  • HY-N3979
    Grossamide
    Inhibitor 98.0%
    Grossamide is a natural product that can be isolated from fructus cannabis, the dried fruit of Cannabis sativa L.. Grossamide has anti-neuroinflammatory effects.
    Grossamide
  • HY-N0592
    Demethyleneberberine
    Inhibitor ≥98.0%
    Demethyleneberberine is a blood-brain barrier-permeable antioxidant. Demethyleneberberine exerts antioxidant effects by targeting mitochondria, activates the AMPK signaling pathway to regulate lipid metabolism, and inhibits inflammation-related pathways such as NF-κB and MAPK. Demethyleneberberine can be used in the research of inflammatory and other diseases.
    Demethyleneberberine
  • HY-N12378
    β-Patchoulene
    Inhibitor
    β-Patchoulene is an orally active anti-inflammatory, antioxidant, and anti-apoptotic agent. β-Patchoulene inhibits the NF-κB, TLR4, and cAMP/PKA/CREB signaling pathways; activates the Sirt1/Nrf2 and AMPK signaling pathways; and targets Fas/FasL, Caspase-3, ERK1/2, ROCK1/MLC2 for inhibition. β-Patchoulene regulates cytokine secretion, inflammatory cell infiltration, lipid peroxidation, cell polarization, gut microbiota, and lipid metabolism, restores barrier function, mitochondrial function, and cell viability, and exhibits repellent activity against Spodoptera exigua larvae. β-Patchoulene can be used in research related to various inflammatory, ischemic, fibrosis-associated diseases, as well as hepatocellular carcinoma.
    β-Patchoulene
  • HY-177624
    Cupabimod
    Inhibitor
    Cupabimod is a decoy oligodeoxynucleotide for transcription factor NF-κB.
    Cupabimod
  • HY-126741R
    Azadirachtin (Standard)
    Inhibitor
    Azadirachtin (Standard) is the analytical standard of Azadirachtin. This product is intended for research and analytical applications. Azadirachtin, one of the most promising botanical insecticides, is widely used for pest control. Azadirachtin induces apoptosis in insect cell lines, including Sf9, SL-1 and BTI-Tn-5B1-4.
    Azadirachtin (Standard)
  • HY-162649
    TIC10g
    Inhibitor 98.92%
    TIC10g is a dual inhibitor for toll-like receptor 7 and 9 (TLR7 and TLR9), which inhibits TLR7 and TLR9 mediated TNF-α release in mouse macrophages (IC50 is 14.5 μM and 6.5 μM) and human B lymphocytes (IC50 is 7.69 μM and 11.5 μM). TIC10g inhibits the activation of NF-κB and MAPK, and exhibits anti-inflammatory activity against systemic lupus erythematosus and rheumatoid arthritis .
    TIC10g
  • HY-121794
    Avarol
    Inhibitor
    Avarol is a sesquiterpene hydroquinone that can be isolated from Dysidea avara sponge. Avarol has the potential for the research of ehrlich carcinoma (EC) and cervical cancer (CC-5).
    Avarol
  • HY-P1407
    Z-Val-Arg-Pro-DL-Arg-Fluoromethylketone TFA
    Inhibitor
    Z-Val-Arg-Pro-DL-Arg-Fluoromethylketone TFA is an irreversible MALT1 protein inhibitor. Z-Val-Arg-Pro-DL-Arg-Fluoromethylketone TFA inhibits the growth and invasion of diffuse large B-cell lymphoma by inhibiting MALT1-induced NF-κB activation and MMP expression.
    Z-Val-Arg-Pro-DL-Arg-Fluoromethylketone TFA
  • HY-N6607R
    Tryptanthrin (Standard)
    Inhibitor
    Tryptanthrin (Standard) is the analytical standard of Tryptanthrin. This product is intended for research and analytical applications. Tryptanthrin is an indole quinazoline that could be an alkaloid from indigo-bearing plants. Tryptanthrin is a potent and orally active cellular Leukotriene (LT) biosynthesis inhibitor. Tryptanthrin has anticancer activity. Tryptanthrin suppresses the expression levels of NOS1, COX-2, and NF-κB and regulates the expression levels of IL-2, IL-10, and TNF-α.
    Tryptanthrin (Standard)
  • HY-N7700
    Guluronic acid
    Inhibitor 98.90%
    Guluronic acid (G2013) is an orally active oxidative stress regulator and anti-inflammatory agent that exerts pharmacological effects by down-regulating various pro-inflammatory and oxidative stress-related genes (such as TLR4, NF-κB, iNOS, etc.) and inhibiting the activities of COX-2, MMPs and VEGF. Low-dose Guluronic acid up-regulates the expression of immunoregulatory genes SHIP1 and SOCS1, thereby effectively inhibiting cancer-related inflammation, tumor angiogenesis, cell adhesion and metastasis, while reducing the accumulation of immunosuppressive cells. Guluronic acid significantly prolongs the survival time of tumor-bearing hosts within a concentration range without direct cytotoxicity, demonstrating favorable safety. Guluronic acid has involved in the research of multiple sclerosis, ankylosing spondylitis, breast cancer and other inflammatory diseases.
    Guluronic acid
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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