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-N2922
    β-Amyrin
    Inhibitor 99.95%
    β-Amyrin shows effectively counteract amyloid β (Aβ)-induced impairment of long-term potentiation (LTP). β-Amyrin is a promising candidate for Alzheimer's disease (AD) research. β-Amyrin exhibits anti-inflammatory effects, protective activity against pulmonary fibrosis, and notable antibacterial capabilities. β-Amyrin is an orally active natural triterpenoid compound.
    β-Amyrin
  • HY-N7088
    Raffinose
    Inhibitor ≥98.0%
    Raffinose (Melitose) regulates intestinal flora, inhibits TLR4-MyD88-NF-κB signaling pathway, and activates Nrf2 signaling pathway. Raffinose exhibits anti-inflammatory, antioxidant, and immunomodulatory activities. Raffinose is orally active.
    Raffinose
  • HY-N2119
    Sciadopitysin
    Inhibitor ≥99.0%
    Sciadopitysin is a type of biflavonoids in leaves from ginkgo biloba. Sciadopitysi inhibits RANKL-induced osteoclastogenesis and bone loss by inhibiting NF-κB activation and reducing the expression of c-Fos and NFATc1.
    Sciadopitysin
  • HY-13755A
    (R)-Sulforaphane
    Inhibitor 99.48%
    (R)-Sulforaphane (L-Sulforaphane) is a orally active, potent inducer of the Keap1/Nrf2/ARE pathway, exhibiting antioxidant and anticancer activities. (R)-Sulforaphane primarily functions by upregulating phase II detoxifying enzymes in cells, aiding in the removal of carcinogens and combating oxidative stress. (R)-Sulforaphane is capable of modulating gene expression, influencing various signaling pathways, including Nrf2, NF-κB, and AP-1. (R)-Sulforaphane can be used in studies of tumor biology, antioxidant defense mechanisms, as well as inflammation and immune responses.
    (R)-Sulforaphane
  • HY-N8211
    Gypenoside L
    Activator 99.55%
    Gypenoside L is a saponin that can be found in Gynostemma pentaphyllum. Gypenoside L increases the SA-β-galactosidase activity, promotes the production of senescence-associated secretory cytokines. Gypenoside L also can activate p38 and ERK MAPK pathways and NF-κB pathway to induce senescence. Gypenoside L exhibits anti-tumor and anti-inflammatory activities.
    Gypenoside L
  • HY-14806A
    Teneligliptin hydrobromide
    Inhibitor 99.99%
    Teneligliptin (MP-513) hydrobromide is an orally active and selective dipeptidyl peptidase 4 (DPP-4) inhibitor (IC50s: 0.37 and 0.29 nM for the human and rat DPP-4, respectively). Teneligliptin hydrobromide improves blood glucose levels and can be used in researches related to type 2 diabetes mellitus.
    Teneligliptin hydrobromide
  • HY-110195
    Smurf1-IN-A01
    99.81%
    Smurf1-IN-A01 is a Smurf1 inhibitor. Smurf1-IN-A01 has anticancer activity and can be used for the research of osteoporosis and age-related macular degeneration.
    Smurf1-IN-A01
  • HY-N0634
    Cimifugin
    Inhibitor 99.95%
    Cimifugin (Cimitin) is a bioactive component of Cimicifuga racemosa, a Chinese herb. Cimifugin suppresses allergic inflammation by reducing epithelial derived initiative key factors via regulating tight junctions. Cimifugin reduces the migration and chemotaxis of RAW264.7 cells and inhibits the release of inflammatory factors and activation of MAPKs and NF-κB signaling pathways induced by LPS.
    Cimifugin
  • HY-N6607
    Tryptanthrin
    Inhibitor 99.89%
    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
  • HY-110261
    GS143
    Inhibitor 99.09%
    GS143 is a selec­tive IκBα ubiquitination inhibitor with an IC50 of 5.2 μM for SCFβTrCP1-mediated IκBα ubiquitylation. GS143 sup­presses NF-κB acti­va­tion and tran­scrip­tion of tar­get genes and does not inhibit proteasome activity. GS143 has anti-asthma effect.
    GS143
  • HY-B0185R
    Lidocaine (Standard)
    Inhibitor
    Lidocaine (Standard) is the analytical standard of Lidocaine. This product is intended for research and analytical applications. 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.
    Lidocaine (Standard)
  • HY-N0436
    Engeletin
    Inhibitor 99.88%
    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
  • HY-128483
    Fusaric acid
    Inhibitor 99.94%
    Fusaric acid is an orally active multi-pathway inhibitor with the activity of inducing oxidative stress and apoptosis. Fusaric acid can chelate divalent metal cations, damage mitochondrial membrane structure, and activate apoptosis-related proteases such as Caspase-3/7, -8, and -9. Fusaric acid also regulates Bax/Bcl-2 protein, inhibits fibrosis-related signaling pathways such as NF-κB, TGF-β1/SMADs, and PI3K/AKT/mTOR, and reduces collagen deposition. Fusaric acid is also a dopamine β-hydroxylase inhibitor, which reduces endogenous levels of norepinephrine and epinephrine in the brain, heart, spleen, and adrenal glands. Fusaric acid can play a role in myocardial fibrosis and improve cardiac hypertrophy in heart disease, and can also be used in the study of esophageal cancer and liver cancer.
    Fusaric acid
  • HY-16172
    DMAPT
    Inhibitor ≥98.0%
    DMAPT (Dimethylamino Parthenolide), an analogue of Parthenolide (PTL), is an oral active NF-κB inhibitor, with a LD50 of 1.7 μM for cell population in AML cells. Has potential anti-cancer and anti-metastatic effect.
    DMAPT
  • HY-P3042
    Chymostatin
    Inhibitor ≥99.0%
    Chymostatin is a SARS-CoV-2 Mpro inhibitor. Chymostatin up-regulates endocan and inhibits NF-κBp65 activity. Chymostatin reduces proinflammatory cytokines (IL-1β and IL-6) and HMGB1. Chymostatin shows protective effects against Paraquat-induced acute lung injury. Chymostatin exhibits anticancer activity against lung cancer.
    Chymostatin
  • HY-121389
    Hexadecanamide
    Inhibitor
    Hexadecanamide (Palmitamide) is a fatty acid amide that has orally active anti-allergic, antioxidant, and neuroprotective effects. Hexadecanamide exerts protective effects in Staphylococcus aureus- and SARA-induced mastitis. Hexadecanamide suppresses S. aureus-induced activation of the NF-κB pathway and improves blood-milk barrier integrity. Hexadecanamide activates PPARα. Hexadecanamide enhances sperm motility in vitro. Hexadecanamide can be studied in research for mastitis and asthenozoospermia.
    Hexadecanamide
  • HY-B1104
    Indoprofen
    Inhibitor 99.52%
    Indoprofen ((±)-Indoprofe) activates AKT-AMPK signaling pathway, inhibits NF-κB/MAPK signaling pathway. Indoprofen exhibits anti-inflammatory and immunomodulatory activities. Indoprofen is orally active.
    Indoprofen
  • HY-N0073
    Sarsasapogenin
    Inhibitor 99.91%
    Sarsasapogenin is a sapogenin from the Chinese medical herb Anemarrhena asphodeloides Bunge, with antidiabetic, anti-oxidative, anticancer and anti-inflamatory activities.
    Sarsasapogenin
  • HY-B0612A
    Lercanidipine hydrochloride
    Inhibitor 99.93%
    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
  • HY-N4187
    Licochalcone D
    Inhibitor 99.80%
    Licochalcone D, a flavonoid compound mainly existing in the root of Glycyrrhiza uralensis, is a potent and orally active inhibitor of NF-kappaB (NF-κB) p65. Licochalcone D possesses antioxidant, anti-inflammatory, anti-cancer properties.
    Licochalcone D
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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