2. Signaling Pathways
  3. NF-κB
  4. NF-κB

NF-κB

Nuclear factor-κB; Nuclear factor-kappaB

NF-κB

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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.

NF-κB Isoform Specific Products:

NF-κB Isoform Comparison
Cat. No. Product Name Effect Purity Chemical Structure
  • HY-18739
    Phorbol 12-myristate 13-acetate
    		Activator 99.80%
    Phorbol 12-myristate 13-acetate (PMA; TPA; Phorbol myristate acetate), a phorbol ester, is a dual SphK and protein kinase C (PKC) activator. Phorbol 12-myristate 13-acetate is a NF-κB activator. Phorbol 12-myristate 13-acetate induces differentiation in THP-1 cells (Validated by MedChemExpress (MCE)).
    Phorbol 12-myristate 13-acetate
  • HY-10071
    Y-27632
    		Inhibitor 99.91%
    Y-27632 is a ROCK inhibitor with Ki values of 220 nM and 300 nM for ROCK1 and ROCK2, respectively. Y-27632 exerts anti-inflammatory and immunomodulatory effects in systemic lupus erythematosus models by inhibiting the ROCK/NF-κB pathway. Y-27632 enhances autophagy by inhibiting the AKT/mTOR pathway, thereby inducing apoptosis apoptosis in oral squamous cell carcinoma. Y-27632 induces the formation of tunneling nanotubes in ARPE-19 cells and significantly enhances mitochondrial transfer through these channels. Y-27632 promotes neurite outgrowth in PC12 cells by activating the Rac1/NOX1/ROS/AKT/PAK1 signaling cascade.
    Y-27632
  • HY-10227
    Bortezomib
    		Inhibitor 99.97%
    Bortezomib (PS-341) is a reversible and selective proteasome inhibitor, and potently inhibits 20S proteasome (Ki=0.6 nM) by targeting a threonine residue. Bortezomib disrupts the cell cycle, induces apoptosis, and inhibits NF-κB. Bortezomib is the first proteasome inhibitor anticancer agent. Bortezomib can be used for the study of multiple myeloma (MM). Bortezomib effectively inhibits TREM2 expression in tumor-associated macrophages (TAMs).
    Bortezomib
  • HY-13453
    BAY 11-7082
    		Inhibitor 99.98%
    BAY 11-7082 is an IκBα phosphorylation and NF-κB inhibitor. BAY 11-7082 selectively and irreversibly inhibits the TNF-α-induced phosphorylation of IκB-α, and decreases NF-κB and expression of adhesion molecules. BAY 11-7082 inhibits ubiquitin-specific protease USP7 and USP21 (IC50=0.19, 0.96 μM, respectively). BAY 11-7082 inhibits gasdermin D (GSDMD) pore formation in liposomes and inflammasome-mediated pyroptosis and IL-1β secretion in human and mouse cells.
    BAY 11-7082
  • HY-13982
    JSH-23
    		Inhibitor 99.92%
    JSH-23 is an NF-κB inhibitor which inhibits NF-κB transcriptional activity with an IC50 of 7.1 μM in lipopolysaccharide (LPS)-stimulated macrophages RAW 264.7. JSH-23 inhibits nuclear translocation of NF-κB p65 without affecting IκBα degradation.
    JSH-23
  • HY-185206
    BSJ-05-037
    		Inhibitor 99.83%
    BSJ-05-037 is an ITK PROTAC degrader that effectively targets and degrades ITK in T-cell lymphoma cell lines. BSJ-05-037 blocks the activation of the NF-κB/GATA-3 signaling pathway, inhibits PLCγ1 phosphorylation, and reduces the proliferative capacity of T-cell lymphoma cells. BSJ-05-037 enhances the sensitivity of T-cell lymphoma cells to chemotherapy. In mouse models of T-cell lymphoma, BSJ-05-037 induces ITK degradation, reduces GATA-3 expression, decreases tumor volume, and reverses chemotherapy resistance. BSJ-05-037 is applicable to research related to T-cell lymphoma.
    BSJ-05-037
  • HY-115590
    JP-11646
    		Inhibitor 98.74%
    JP-11646 is a pan-PIM inhibitor with increased potency against PIM2 (IC50 = 0.5 nM). JP11646 is freely reversible and ATP non-competitive. JP-11646 results in a decrease of PIM1, 2, and 3 mRNA. JP-11646 can effectively inhibit cell viability in small cell lung cancer (SCLC) and large cell neuroendocrine carcinomas of the lung (LCNEC). JP-11646 can cause a decrease in p-4EBP-1 protein, increasing the cleavage of caspases while decreasing caspase-3. JP-11646 induces apoptosis or necroptosis in cells. JP-11646 leads to reductions in MYC paralogs. JP-11646 can be used for the study of SCLC, LCNEC, human acute leukemia (AML), multiple myeloma (MM), and triple-negative breast cancer (TNBC).
    JP-11646
  • HY-P10462A
    SAP15 acetate
    		Inhibitor 98.04%
    SAP15 (Synthetic anti-inflammatory peptide 15) acetate is a synthetic anti-inflammatory peptide consisting of 15 amino acids designed from human beta-defensin 3. SAP15 acetate has the ability to penetrate cells and is able to induce downregulation of intracellular inflammation. SAP15 acetate inhibits inflammation by inhibiting the phosphorylation of HDAC5 and thereby reducing the phosphorylation of NF-κB p65. SAP15 acetate inhibits HDAC5 and NF-κB p65 phosphorylation in LPS (HY-D1056)-induced macrophages. SAP15 acetate increases the expression of aggrecan and type II collagen and decreases the expression of osteocalcin in LPS-induced chondrocytes. SAP15 acetate can be used in the study of inflammation regulation and anti-inflammatory therapy of biomaterials.
    SAP15 acetate
  • HY-100487
    TAK-243
    		Inhibitor 99.86%
    TAK-243 (MLN7243) is a first-in-class, selective ubiquitin activating enzyme, UAE (UBA1) inhibitor (IC50=1 nM), which blocks ubiquitin conjugation, disrupting monoubiquitin signaling as well as global protein ubiquitination. TAK-243 (MLN7243) induces endoplasmic reticulum (ER) stress, abrogates NF-κB pathway activation and promotes apoptosis.
    TAK-243
  • HY-32735
    Triptolide
    		Inhibitor 99.94%
    Triptolide is a diterpenoid triepoxide extracted from the root of Tripterygium wilfordii with immunosuppressive, anti-inflammatory, antiproliferative and antitumour effects. Triptolide is a NF-κB activation inhibitor.
    Triptolide
  • HY-15027
    5-Aminosalicylic Acid
    		Inhibitor 99.97%
    5-Aminosalicylic acid (Mesalamine) acts as a specific PPARγ agonist and also inhibits p21-activated kinase 1 (PAK1) and NF-κB. 5-Aminosalicylic acid can inhibit the activity of osteopontin (OPN).
    5-Aminosalicylic Acid
  • HY-14654
    Aspirin
    		Inhibitor 99.90%
    Aspirin (Acetylsalicylic acid) is an orally active, potent and irreversible inhibitor of cyclooxygenase COX-1 and COX-2, with IC50 values of 5 and 210 μg/mL, respectively. Aspirin induces apoptosis. Aspirin inhibits the activation of NF-κB. Aspirin also inhibits platelet prostaglandin synthetase, and can prevent coronary artery and cerebrovascular thrombosis.
    Aspirin
  • HY-N0197
    Baicalin
    		Inhibitor 98.92%
    Baicalin, as a flavonoid glycoside, is an allosteric carnitine palmityl transferase 1 (CPT1) activator. Baicalin reduces the expression of NF-κB.
    Baicalin
  • HY-N0822
    Shikonin
    		Inhibitor 99.80%
    Shikonin is a major component of a Chinese herbal medicine named zicao. Shikonin is a potent TMEM16A chloride channel inhibitor with an IC50 of 6.5 μM. Shikonin is a specific pyruvate kinase M2 (PKM2) inhibitor and can also inhibit TNF-α and NF-κB pathway. Shikonin decreases exosome secretion through the inhibition of glycolysis. Shikonin inhibits AIM2 inflammasome activation.
    Shikonin
  • HY-B1449
    Uridine
    		Inhibitor 99.97%
    Uridine (β-Uridine) is a nucleoside compound composed of uracil and a ribose ring, which are connected by a β-N1-glycosidic bond.
    Uridine
  • HY-14655
    Sulfasalazine
    		Inhibitor 99.57%
    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
  • HY-107910
    Hyaluronidase, Bovine testes
    		Activator
    Hyaluronidase, Bovine testes (Hyaluronate 4-glycanohydrolase; Hyaluronoglucosaminidase) is an endoglycosidase that depolymerizes Hyaluronic acid (HA) (HY-B0633A) by cleavage of glycosidic bonds. Hyaluronidase degrades HA and activates membrane receptors that trigger pathways converging in NF-κB activation. Hyaluronidase is employed in the research of granulomatous foreign body reactions, soft-tissue necrosis caused by vascular compromise and uncomplicated nodules, overcorrection, inflamed nodules or tissue ischemia associated with HA filler injection.
    Hyaluronidase, Bovine testes
  • HY-N0176
    Dihydroartemisinin
    		Inhibitor 99.03%
    Dihydroartemisinin is an orally active metabolite of rtemisinin (HY-B0094) and antimalarial agent. Dihydroartemisinin induces Autophagy by inhibiting NF-κB activation. Dihydroartemisinin promotes ROS accumulation. Dihydroartemisinin exhibits anticancer activity in esophageal cancer cells. Dihydroartemisinin shows schistosomicidal activity against juvenile and adult worms of Schistosoma japonicum, reduces worm burden, and displays antiparasitic activity. Dihydroartemisinin can be used in research related to multiple myeloma, promyelocytic leukemia, esophageal cancer, and Schistosoma japonicum infection.
    Dihydroartemisinin
  • HY-107632
    GYY4137
    		Inhibitor 98.08%
    GY4137 is a sustained-release H2S donor possessing vasodilatory, antihypertensive, and anti-inflammatory activities. GY4137 can inhibit cell growth, induce apoptosis, and cause cell cycle arrest by blocking the STAT3 pathway, demonstrating potent anticancer activity.
    GYY4137
  • HY-P1956
    Human serum albumin
    		Inhibitor 99.9%
    Human serum albumin (HSA) is the most abundant protein in plasma and is a major determinant of plasma oncotic pressure. Human serum albumin exhibits antioxidant, anticoagulant, anti-inflammatory, anti-platelet aggregation activities as well as colloid osmotic action. Human serum albumin can block the inhibitory effect of GML on human T cells, providing protective function for T cells. Human serum albumin is also associated with cardiovascular diseases and can partially prevent the LPS (HY-D1056) induced oxidative stress, as well as the upregulation of NF-κB, NF-κB, and peroxynitrite (ONOO−) in the vascular wall, contributing to the reduction of blood pressure.
    This product is recombinant Human Serum Albumin expressed in a microbial expression system.
    Human serum albumin
Cat. No. Product Name / Synonyms Application Reactivity
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Download NF-κB Signaling Pathway Map.

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.

NF-κB Isoform Comparison

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