2. Signaling Pathways
  3. Apoptosis
  4. TNF Receptor

TNF Receptor

Tumor Necrosis Factor Receptor; TNFR

TNF Receptor

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Tumor necrosis factor (TNF) is a major mediator of apoptosis as well as inflammation and immunity, and it has been implicated in the pathogenesis of a wide spectrum of human diseases, including sepsis, diabetes, cancer, osteoporosis, multiple sclerosis, rheumatoid arthritis, and inflammatory bowel diseases.

TNF-α is a 17-kDa protein consisting of 157 amino acids that is a homotrimer in solution. In humans, the gene is mapped to chromosome 6. Its bioactivity is mainly regulated by soluble TNF-α–binding receptors. TNF-α is mainly produced by activated macrophages, T lymphocytes, and natural killer cells. Lower expression is known for a variety of other cells, including fibroblasts, smooth muscle cells, and tumor cells. In cells, TNF-α is synthesized as pro-TNF (26 kDa), which is membrane-bound and is released upon cleavage of its pro domain by TNF-converting enzyme (TACE).

Many of the TNF-induced cellular responses are mediated by either one of the two TNF receptors, TNF-R1 and TNF-R2, both of which belong to the TNF receptor super-family. In response to TNF treatment, the transcription factor NF-κB and MAP kinases, including ERK, p38 and JNK, are activated in most types of cells and, in some cases, apoptosis or necrosis could also be induced. However, induction of apoptosis or necrosis is mainly achieved through TNFR1, which is also known as a death receptor. Activation of the NF-κB and MAPKs plays an important role in the induction of many cytokines and immune-regulatory proteins and is pivotal for many inflammatory responses.

TNF Receptor Isoform Specific Products:

TNF Receptor Isoform Comparison
Cat. No. Product Name Effect Purity Chemical Structure
  • HY-112275
    TNF-α-IN-1
    		Inhibitor 99.42%
    TNF-α-IN-1 is a TNF-α inhibitor extracted from patent US20030096841A1, compound example I-7.
    TNF-α-IN-1
  • HY-B0446
    Naphazoline hydrochloride
    		Inhibitor 98.37%
    Naphazoline (Naphthazoline) hydrochloride is a potent α-adrenergic receptor agonist. Naphazoline hydrochloride reduces vascular hyperpermeability and promotes vasoconstriction. Naphazoline hydrochloride reduces the levels of inflammatory factors (TNF-α, IL-1β and IL-6), cytokines (IFN-γ and IL-4), IgE, GMCSF, and NGF。Naphazoline hydrochloride can be used for non-bacterial conjunctivitis research.
    Naphazoline hydrochloride
  • HY-P99325
    Toralizumab
    		Inhibitor
    Toralizumab (IDEC-131) is a humanized monoclonal antibody (mAb) against CD40L (CD154) comprised of human gamma 1 heavy chains and human kappa light chains. Toralizumab binds specifically to human CD40L on T cells, thereby preventing CD40 signaling. Toralizumab, a immunosuppressive agent, has the potential for active systemic lupus erythematosus (SLE) research.
    Toralizumab
  • HY-N2055
    Kaempferol 3-O-sophoroside
    		Inhibitor 99.84%
    Kaempferol 3-O-sophoroside is an orally active derivative of Kaempferol. It exhibits anti-inflammatory, analgesic, and antidepressant effects. Kaempferol 3-O-sophoroside is an inhibitor of the cell surface receptor toll-like receptor (TLR) 2/4 for High mobility group box 1 (HMGB1), and it also exerts anti-inflammatory effects by blocking the activation of NF-κB expression and the production of TNF-α. Kaempferol 3-O-sophoroside promotes the production of brain-derived neurotrophic factor (BDNF) and enhances autophagy by binding to AMP-activated protein kinase (AMPK), thereby exerting antidepressant effects. Kaempferol 3-O-sophoroside holds promise for research in the fields of inflammation and neurodegenerative diseases.
    Kaempferol 3-O-sophoroside
  • HY-N7513
    Homovanillyl alcohol
    		99.84%
    Homovanillyl alcohol is a biological metabolite of Hydroxytyrosol. Hydroxytyrosol is a phenolic compound that is present in virgin olive oil (VOO) and wine. Homovanillyl alcohol protects red blood cells (RBCs) from oxidative injury and has protective effect on cardiovascular disease.
    Homovanillyl alcohol
  • HY-N3021
    D-chiro-Inositol
    		Inhibitor ≥98.0%
    D-chiro-Inositol is a stereoisomer of inositol that exhibits activities such as improving glucose metabolism, anti-tumor effects, anti-inflammatory properties, and antioxidant activity. D-chiro-Inositol effectively alleviates cholestasis by enhancing bile acid secretion and reducing oxidative stress. D-chiro-Inositol improves insulin resistance, lowers hyperglycemia and circulating insulin levels, reduces serum androgen levels, and ameliorates some metabolic abnormalities associated with X syndrome by mimicking the action of insulin. Additionally, D-chiro-Inositol can induce a reduction in pro-inflammatory factors (such as Nf-κB) and cytokines (such as TNF-α), thereby exerting anti-inflammatory effects. D-chiro-Inositol may be used in the study of liver cirrhosis, breast cancer, type 2 diabetes, and polycystic ovary syndrome.
    D-chiro-Inositol
  • HY-118694
    TAPI-0
    		Inhibitor 98.01%
    TAPI-0 is a TACE (TNF-α converting enzyme; ADAM17) inhibitor with an IC50 of 100 nM. TAPI-0 is a MMP inhibitor and also attenuates TNF-α processing.
    TAPI-0
  • HY-154821A
    DRI-C21041 (DIEA)
    		Inhibitor
    DRI-C21041 DIEA is a CD40/CD40L interaction inhibitor, with an IC50 of 0.31 μM. DRI-C21041 DIEA inhibits the immune response induced by alloantigen.
    DRI-C21041 (DIEA)
  • HY-12557
    γ-Glutamylvaline
    		Inhibitor 99.73%
    γ-Glutamylvaline is an activator of CaSR with anti-inflammatory activity. γ-Glutamylvaline inhibits TNF-α-induced proinflammatory cytokine production and increases Wnt5a expression. γ-Glutamylvaline activates calcium-sensing receptor pathways in adipocytes of 3T3-L1 mice and prevents low-grade chronic inflammation.
    γ-Glutamylvaline
  • HY-135674
    SR-318
    		Inhibitor 99.89%
    SR-318 is a potent and highly selective p38 MAPK inhibitor with IC50s of 5 nM, 32 nM and 6.11 μM for p38α, p38β and p38α/β, respectively. SR-318 potently inhibits the TNF-α release in whole blood with an IC50 of 283 nM. SR-318 has anti-cancer and anti-inflammatory activity.
    SR-318
  • HY-19667A
    BMS-561392 formate
    		Inhibitor 99.38%
    BMS-561392 formate is the formate form of BMS-561392 (HY-19667). BMS-561392 is a TNF alpha-converting enzyme (TACE) inhibitor. BMS-561392 is also an ADAM17 blocker. BMS-561392 can be used for research of inflammatory bowel disease.
    BMS-561392 formate
  • HY-B0513
    Methylthiouracil
    		Inhibitor ≥98.0%
    Methylthiouracil is an antithyroid agent. Methylthiouracil suppresses the production TNF-α and IL-6, and the activation of NF-κB and ERK1/2.
    Methylthiouracil
  • HY-N0182R
    Fisetin (Standard)
    		Inhibitor 98.47%
    Fisetin (Standard) is the analytical standard of Fisetin. This product is intended for research and analytical applications. Fisetin is a natural flavonol found in many fruits and vegetables with various benefits, such as antioxidant, anticancer, neuroprotection effects.
    Fisetin (Standard)
  • HY-N6255
    Ilexgenin A
    		98.33%
    Ilexgenin A is a pentacyclic triterpenoid, which extracted from Ilex hainanensis Merr. Ilexgenin A can be used for the research of inflammation and cancer.
    Ilexgenin A
  • HY-W082785A
    L6H21
    		Inhibitor 99.46%
    L6H21, a Chalcone (HY-121054) derivative, is an orally active, potent and specific myeloid differentiation 2 (MD-2) inhibitor. L6H21 directly binds to MD-2 protein with a high affinity and low KD value of 33.3?μM, blocking the formation of the LPS-TLR4/MD-2 complex. L6H21 inhibits LPS-induced expression of TNF-α and IL-6 in RAW264.7 macrophages, with IC50 values of 6.58 and 8.59 μM, respectively. L6H21 can be used for alcoholic liver disease, metabolic disturbance and neuroinflammation research.
    L6H21
  • HY-N7012
    7,3',4'-Tri-O-methylluteolin
    		Inhibitor 99.28%
    7,3',4'-Tri-O-methylluteolin (5-Hydroxy-3',4',7-trimethoxyflavone), a flavonoid compound, possesses potent anti-inflammatory effects in LPS-induced macrophage cell line mediated by inhibition of release of inflammatory mediators, NO, PGE2, and pro-inflammatory cytokines. 7,3',4'-Tri-O-methylluteolin significantly induces reduction in the mRNA expressions of inducible nitric oxide synthase and cyclooxygenase-2.
    7,3',4'-Tri-O-methylluteolin
  • HY-145726
    ISIS 104838
    		Inhibitor
    ISIS 104838 is an antisense oligonucleotide agent that reduces the production of tumor necrosis factor (TNF-alpha), a substance that contributes to joint pain and swelling in rheumatoid arthritis.
    ISIS 104838
  • HY-N2252
    Licarin A
    		Inhibitor 98.48%
    Licarin A ((+)-Licarin A), a neolignan, significantly and dose-dependently reduces TNF-α production (IC50=12.6 μM) in dinitrophenyl-human serum albumin (DNP-HSA)-stimulated RBL-2H3 cells. Anti-allergic effects. Licarin A reduces TNF-α and PGD2 production, and COX-2 expression.
    Licarin A
  • HY-N0358
    1,4-Dicaffeoylquinic acid
    		Inhibitor 99.80%
    1,4-Dicaffeoylquinic acid (1,4-DCQA) is a phenylpropanoid from Xanthii fructus, inhibits LPS-stimulated TNF-α production.
    1,4-Dicaffeoylquinic acid
  • HY-N2855
    Alphitolic acid
    		Inhibitor
    Alphitolic acid (Aophitolic acid) is an anti-inflammatory triterpene could found in quercus aliena. Alphitolic acid blocks Akt–NF-κB signaling to induce apoptosis. Alphitolic acid induces autophagy. Alphitolic acid has anti-inflammatory activity and down-regulates the NO and TNF-α production. Alphitolic acid can be used for cancer and inflammation research.
    Alphitolic acid
Cat. No. Product Name / Synonyms Species Source
Cat. No. Product Name / Synonyms Application Reactivity
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Download TNF Receptor Signaling Pathway Map.

Following the binding of TNF to TNF receptors, TNFR1 binds to TRADD, which recruits RIPK1, TRAF2/5 and cIAP1/2 to form TNFR1 signaling complex I; TNFR2 binds to TRAF1/2 directly to recruit cIAP1/2. Both cIAP1 and cIAP2 are E3 ubiquitin ligases that add K63 linked polyubiquitin chains to RIPK1 and other components of the signaling complex. The ubiquitin ligase activity of the cIAPs is needed to recruit the LUBAC, which adds M1 linked linear polyubiquitin chains to RIPK1. K63 polyubiquitylated RIPK1 recruits TAB2, TAB3 and TAK1, which activate signaling mediated by JNK and p38, as well as the IκB kinase complex. The IKK complex then activates NF-κB signaling, which leads to the transcription of anti-apoptotic factors-such as FLIP and Bcl-XL-that promote cell survival. 

 

The formation of TNFR1 complex IIa and complex IIb depends on non-ubiquitylated RIPK1. For the formation of complex IIa, ubiquitylated RIPK1 in complex I is deubiquitylated by CYLD. This deubiquitylated RIPK1 dissociates from the membrane-bound complex and moves into the cytosol, where it interacts with TRADD, FADD, Pro-caspase 8 and FLIPL to form complex IIa. By contrast, complex IIb is formed when the RIPK1 in complex I is not ubiquitylated owing to conditions that have resulted in the depletion of cIAPs, which normally ubiquitylate RIPK1. This non-ubiquitylated RIPK1 dissociates from complex I, moves into the cytosol, and assembles with FADD, Pro-caspase 8, FLIPL and RIPK3 (but not TRADD) to form complex IIb. For either complex IIa or complex IIb to prevent necroptosis, both RIPK1 and RIPK3 must be inactivated by the cleavage activity of the Pro-caspase 8-FLIPL heterodimer or fully activated caspase 8. The Pro-caspase 8 homodimer generates active Caspase 8, which is released from complex IIa and complex IIb. This active Caspase 8 then carries out cleavage reactions to activate downstream executioner caspases and thus induce classical apoptosis. 

 

Formation of the complex IIc (necrosome) is initiated either by RIPK1 deubiquitylation mediated by CYLD or by RIPK1 non-ubiquitylation due to depletion of cIAPs, similar to complex IIa and complex IIb formation. RIPK1 recruits numerous RIPK3 molecules. They come together to form amyloid microfilaments called necrosomes. Activated RIPK3 phosphorylates and recruits MLKL, eventually leading to the formation of a supramolecular protein complex at the plasma membrane and necroptosis [1][2].

 

Reference:
[1]. Brenner D, et al. Regulation of tumour necrosis factor signalling: live or let die.Nat Rev Immunol. 2015 Jun;15(6):362-74. 
[2]. Conrad M, et al. Regulated necrosis: disease relevance and therapeutic opportunities.Nat Rev Drug Discov. 2016 May;15(5):348-66. 
 

TNF Receptor Isoform Comparison

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