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-N1486R
    Ursonic acid (Standard)
    Inhibitor
    CSRM617 (Standard) is the analytical standard of CSRM617. This product is intended for research and analytical applications. CSRM617 is a selective small-molecule inhibitor of the transcription factor ONECUT2 (OC2, a master regulator of androgen receptor) with a Kd of 7.43 uM in SPR assays, binding to OC2-HOX domain directly. CSRM617 induces apoptosis by appearance of cleaved Caspase-3 and PARP. CSRM617 is well tolerated in the prostate cancer mouse model
    Ursonic acid (Standard)
  • HY-146564
    R-HP210
    98.21%
    R-HP210 acts on the NF-κB mediated tethered transrepression function (IC50=3.80 μM). R-HP210 represses the LPS-induced transcription of a variety of proinflammatory genes such as IL-1β, IL-6 and COX-2. R-HP210 does not induce the transactivation functions of Glucocorticoids (GCs).
    R-HP210
  • HY-14942A
    Berubicin hydrochloride
    Agonist
    Berubicin (RTA 744) hydrochloride is a Doxorubicin (HY-15142A) analog that can cross the blood-brain barrier. Berubicin hydrochloride inhibits P-gp and MRP1-mediated efflux and suppresses glioblastoma multiforme (GBM). Berubicin hydrochloride exerts toxic effects on leukemia cells by activating nuclear factor κB (NF-κB) and induces apoptosis in neuroblastoma cells. Berubicin hydrochloride can be used in the study of tumors related to the nervous system.
    Berubicin hydrochloride
  • HY-169949
    TAK-756
    Inhibitor
    TAK-756 is a selective transforming growth factor β-activated kinase 1 (TAK1) inhibitor with a target pIC50 of 8.6. TAK-756 can inhibit TAK1 autophosphorylation and downstream NF-κB phosphorylation, suppress the production of inflammatory and catabolic factors such as MMP-3 and IL-6. TAK-756 exhibits anti-inflammatory effects in a rat joint inflammation model. TAK-756 can be used for the research of inflammatory joint disease, osteoarthritis.
    TAK-756
  • HY-179095
    UR241-2
    Inhibitor 99.68%
    UR241-2 is an IRAK4 inhibitor. UR241-2 suppresses IL-1–induced IRAK1/4 signaling, NF-κβ activation, and phosphorylation of p65 and p38. UR241-2 selectively inhibits leukemia stem cell clonogenicity. UR241-2 can serve as a ligand for target proteins for PROTAC, facilitating the development and design of PROTAC degraders for IRAK4. UR241-2 can be used in the research of acute myeloid leukemia.
    UR241-2
  • HY-N0509R
    Astilbin (Standard)
    Inhibitor
    Astilbin (Standard) is the analytical standard of Astilbin. This product is intended for research and analytical applications. Astilbin is a flavonoid compound and enhances NRF2 activation. Astilbin also suppresses TNF-α expression and NF-κB activation.
    Astilbin (Standard)
  • HY-P10966A
    Tat-IKIP (46-60) TFA
    Inhibitor 99.76%
    Tat-IKIP (46-60) TFA is the trifluoroacetic acid of Tat-IKIP (46-60) (HY-P10966). Tat-IKIP (46-60) is a IκB kinase (IKK)-targeting membrane-penetrating peptide. Tat-IKIP (46-60) inhibits IKK activation and NF-κB targeted gene expression by disrupting the IKKβ/NEMO complex. Tat-IKIP (46-60) significantly reduces DSS (HY-116282)-induced acute inflammation in inflammatory bowel disease (IBD) mice model and attenuates Zymosan-induced acute arthritis in acute arthritis model (AAM). Tat-IKIP (46-60) can be used for inflammatory diseases research, such as IBD, pancreatitis and rheumatoid arthritis.
    Tat-IKIP (46-60) TFA
  • HY-145491
    Resolvin D5
    Inhibitor 98.3%
    Resolvin D5 is an anti-inflammatory and analgesic agent produced in M2 macrophages. Resolvin D5 alleviates Paclitaxel (HY-B0015)-induced mechanical allodynia and inflammatory pain by activating the GPR32 receptor, with gender specificity (effective only in male mice) and independence from TRPV1 or TRPA1 channels. Resolvin D5 attenuates LPS-induced ERK phosphorylation and NF-κB nuclear translocation, downregulates proinflammatory mediators such as IL-6 and CCL5, inhibits Th17 cell differentiation and osteoclastogenesis, promotes regulatory T cell differentiation, and shows no cytotoxicity to human monocytes. The level of Resolvin D5 is elevated in arthritic SKG mice, but Resolvin D5 has no effect on dendritic cell differentiation or M1 macrophage polarization, nor does it prevent ZyA-induced arthritis progression. Resolvin D5 is suitable for research related to chemotherapy-induced peripheral neuropathy, inflammatory pain and rheumatoid arthritis.
    Resolvin D5
  • HY-P11115A
    CIGB-552 TFA
    Inhibitor
    CIGB-552 TFA is a cell-penetrating peptide with anti-tumor properties with the IC50 of 23 μM in H460 cells. CIGB-552 TFA can increase the level of protein COMMD1. CIGB-552 TFA significantly inhibits the NF-κB signaling pathway. CIGB-552 TFA can promote apoptosis of the tumor cells. CIGB-552 TFA can induce the accumulation of reactive oxygen species (ROS) in tumor cells. CIGB-552 TFA has anti-inflammatory and anti-angiogenic effects. CIGB-552 TFA can be used for the research of the lung cancer and colon cancer.
    CIGB-552 TFA
  • HY-N11657
    Sanggenon A
    Inhibitor
    Sanggenon A (Sanggenone A) exerts anti-inflammatory effects by regulating NF-κB and HO-1/Nrf2 signaling pathways in BV2 and RAW264.7 cells. Sanggenon A markedly inhibits the Lipopolysaccharide (LPS; HY-D1056)-induced production of nitric oxide.
    Sanggenon A
  • HY-N2205
    Esculentoside H
    Inhibitor 98.73%
    Esculentoside H (EsH) is a saponin isolated from the root extract of perennial plant Phytolacca esculenta. Esculentoside H (EH) has anti-tumor activity, the mechanism is related to the capacity for TNFrelease. Esculentoside H (EsH) suppresses colon cancer cell migration through blockage of the JNK1/2 and NF-κB signaling-mediated matrix metalloproteinases-9 (MMP-9) expression.
    Esculentoside H
  • HY-16172A
    (S)-DMAPT
    Inhibitor
    (S)-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.
    (S)-DMAPT
  • HY-148552
    Anti-inflammatory agent 35
    Inhibitor 99.77%
    Anti-inflammatory agent 35 (compound 5a27) is an orally active curcumin analogue with anti-inflammatory activity. Anti-inflammatory agent 35 blocks mitogen-activated protein kinase (MAPK) signaling and p65 nuclear translocation of NF-kB. Anti-inflammatory agent 35 also inhibits yellow neutrophil infiltration and pro-inflammatory cytokine production. Anti-inflammatory agent 35 significantly attenuates lipopolysaccharide (LPS)-induced acute lung injury (ALI) in vivo.
    Anti-inflammatory agent 35
  • 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-N0298S
    Stachydrine-d6
    99.9%
    Stachydrine-d6 is a deuterated labeled Stachydrine (HY-N0298). Stachydrine is a major constituent of Chinese herb leonurus heterophyllus sweet used to promote blood circulation and dispel blood stasis. Stachydrine can inhibit the NF-κB signal pathway.
    Stachydrine-d<sub>6</sub>
  • 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-N7980
    Rubipodanone A
    Activator 99.40%
    Rubipodanone A, a naphthohydroquinone dimer, shows cytotoxicity against A549, BEL-7402, HeLa, HepG2, SGC-7901 and U251 cells. Rubipodanone A also shows obvious activating effect at 20 and 40 μM for NF-κB.
    Rubipodanone A
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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