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-W026772S1
    Fluorene-d8
    Fluorene-d8 is the deuterium labeled Fluorene (HY-W026772). Fluorene is an orally active polycyclic aromatic hydrocarbon (PAH) and a precursor to other fluorene-based compounds. Fluorene and its derivatives serve as dye precursors for fluorene synthesis. In A549 cells, Fluorene induces oxidative stress and inflammatory responses by increasing ROS and SOD generation, exacerbating lipid peroxidation, modulating antioxidant enzyme activity, and upregulating the expression of pro-inflammatory factors TNF-α and IL-6. In vivo, Fluorene exhibits anxiolytic activity. Fluorene holds potential for research in inflammation and neurological disorders.
    Fluorene-d<sub>8</sub>
  • HY-168782
    Resolvin D2 n-3 DPA
    		Inhibitor
    Resolvin D2 n-3 DPA is a specialized proresolving mediator (SPM). Resolvin D2 n-3 DPA (1 nM) can reduce the chemotaxis and adhesion of human neutrophils induced by TNF-α. Resolvin D2 n-3 DPA (100 ng/mouse; intravenous injection) can reduce neutrophil infiltration in the peritoneum and the levels of IL-6 and the chemokine (C-C motif) ligand 2 (CCL2) in a mouse model of inflammation induced by zinc oxide.
    Resolvin D2 n-3 DPA
  • HY-163915
    8-(4-(Trifluoromethyl)anilino)quercetin
    		Inhibitor
    8-(4-(Trifluoromethyl)anilino)quercetin is a potent ErmA inhibitor. 8-(4-(Trifluoromethyl)anilino)quercetin has antioxidant and anti-inflammatory activity.
    8-(4-(Trifluoromethyl)anilino)quercetin
  • HY-N0635R
    Prim-O-glucosylcimifugin (Standard)
    Prim-O-glucosylcimifugin (Standard) is the analytical standard of Prim-O-glucosylcimifugin. This product is intended for research and analytical applications. Prim-O-glucosylcimifugin exerts anti-inflammatory effects through the inhibition of iNOS and COX-2 expression by through regulating JAK2/STAT3 signaling.
    Prim-O-glucosylcimifugin (Standard)
  • HY-156431
    Anti-inflammatory agent 61
    		Inhibitor
    Anti-inflammatory agent 61 (Compound 5b) is a potent anti-inflammatory agent. Anti-inflammatory agent 61 reduces TNF-α expression in LPS-induced inflammation in RAW 264.7 cells. Anti-inflammatory agent 61 alleviates APAP-induced inflammation in HepG2 cells.
    Anti-inflammatory agent 61
  • HY-169118
    EGR-1-IN-2
    		Inhibitor
    EGR-1-IN-2 (compound 2) is an EGR-1 inhibitor with anti-inflammatory activity. EGR-1-IN-2 inhibits the formation of EGR-1-DNA complexes induced by TNF-α in HaCaT cells.
    EGR-1-IN-2
  • HY-P991126
    Ciltistotug
    		Ligand
    Ciltistotug is a monoclonal antibody targeting human CD40 (TNFRSF5). Ciltistotug activates immune cells after binding to CD40, exerting immunostimulatory and antitumor activities. Ciltistotug is promising for research of cancer immunotherapy.
    Ciltistotug
  • HY-P991125
    Cenzestotug
    		Ligand
    Cenzestotug is a monoclonal antibody targeting human tumor necrosis factor receptor superfamily member 4 (TNFRSF4). Cenzestotug activates relevant immune cells by binding to TNFRSF4, exerting immunostimulatory and antitumor activities. Cenzestotug is promising for research of cancer immunotherapy.
    Cenzestotug
  • HY-P991091
    COVA322
    		Inhibitor
    COVA322 is a bispecific TNF and IL-17A antibody. COVA322 inhibits simultaneously TNF and the IL-17A homodimer that can be used for the study of inflammatory diseases.
    COVA322
  • HY-134070
    2-O-Methyl PAF C-16
    		Activator
    2-O-Methyl PAF C-16 (ET-18-O-OCH3), a structural analog of the mediator of inflammation platelet-activating factor (PAF), is a cytotoxic ether lipid. 2-O-Methyl PAF C-16 stimulates TNF-α release in murine macrophages.
    2-O-Methyl PAF C-16
  • HY-N12116
    Maceneolignan A
    		Inhibitor
    Maceneolignan A is a natural product that can be isolated from mace, the aril of Myristica fragrans (Myristicaceae). Maceneolignan A inhibits the release of β-hexosaminidase in RBL-2H3 cells, with an IC50 of 48.4 μM. Maceneolignan A inhibits the release of TNF-α in antigen stimulated RBL-2H3 cells, with an IC50 of 63.7 μM.
    Maceneolignan A
  • HY-15643
    LY 303511
    		Activator
    LY303511 is a structural analogue of LY294002. LY303511 does not inhibit PI3K. LY303511 enhances TRAIL sensitivity of SHEP-1 neuroblastoma cells. LY303511 reversibly blocks K+ currents (IC50=64.6±9.1 μM) in MIN6 insulinoma cells.
    LY 303511
  • HY-N15378
    β-Carotene-15,15'-epoxide
    		Inhibitor
    β-carotene-15,15ʹ-epoxide is a XIAP antagonist with apoptosis-inducing and antitumor activity, found in the leaves of Spondias mombin. In a DMBA (HY-W011845)-induced rat model of breast cancer, β-carotene-15,15ʹ-epoxide binds to the BIR3 domain of the anti-apoptotic protein XIAP, blocking its interaction with caspase-9 and thereby promoting tumor cell apoptosis. In addition, β-carotene-15,15ʹ-epoxide significantly downregulates the expression of BCL-2, COX-2, and TNF-α in tumor tissues, reduces MDA levels, increases catalase activity, and modulates serum levels of LDH, ALP, and ALT, demonstrating strong antioxidant, anti-inflammatory, and metabolic protective effects. β-carotene-15,15ʹ-epoxide may be used in research on inflammation-related conditions and cancers such as breast cancer.
    β-Carotene-15,15'-epoxide
  • HY-15790S
    Elobixibat-d5
    		Inhibitor
    Elobixibat-d5 (A 3309-d5) is deuterium labeled Elobixibat. Elobixibat (A 3309; AZD 7806) is an orally effective Apical Sodium-Dependent Bile (IBAT) inhibitor, with an IC50 value of 0.53 nM (human IBAT ), 0.13 nM (mouse IBAT), 5.8 nM (canine IBAT). Elobixibat lowers LDL cholesterol, increases serum GLP-1, promotes colon motility, and has the potential to treat metabolic syndrome. Elobixibat can be used to study constipation, dyslipidemia, non-alcoholic hepatitis, and liver tumors.
    Elobixibat-d<sub>5</sub>
  • HY-W753791
    (±)-Perillaldehyde
    		Inhibitor
    (±)-Perillaldehyde has an antidepressant effect by modulating the olfactory nervous system in a mouse model of stress-induced depression. (±)-Perillaldehyde also has anti-inflammatory activity, inducing JNK activation in RAW264.7 cells and inhibiting the expression of TNF-α, with an IC50 of 171.7 μM.
    (±)-Perillaldehyde
  • HY-110343
    DBM 1285 dihydrochloride
    		Inhibitor
    DBM 1285 dihydrochloride is an orally active TNF-α production inhibitor with anti-inflammatory effects. DBM 1285 dihydrochloride inhibits Lipopolysaccharide (LPS)-induced TNF-α secretion in various cells of macrophage/monocyte lineage.
    DBM 1285 dihydrochloride
  • HY-12085R
    Apremilast (Standard)
    		Inhibitor
    Apremilast (Standard) is the analytical standard of Apremilast. This product is intended for research and analytical applications. Apremilast (CC-10004) is an orally available inhibitor of type-4 cyclic nucleotide phosphodiesterase (PDE-4) with an IC50 of 74 nM. Apremilast inhibits TNF-α release by lipopolysaccharide (LPS) with an IC50 of 104 nM.
    Apremilast (Standard)
  • HY-168384
    M04
    		Inducer
    M04 is an agonist of STING. It induces the expression of the IFN reporter gene in HEK293T cells expressing wild-type human STING, but does not induce this expression in HEK293T cells expressing the R71H-G230A-R293Q (HAQ) STING variant or in mouse RAW 264.7 cells, indicating that its activity is dependent on allelic and species variations. M04 induces the production of TNF-α, IL-10, IL-1β, and IL-12p70 in human peripheral blood mononuclear cells (PBMCs). At a concentration of 50 µM, M04 stimulates dendritic cells isolated from PBMCs to express the MHC class II cell surface receptor HLA-DR and co-stimulatory molecules CD40, CD80, and CD86, and also enhances their ability to activate T cells in an ex vivo assay. M04 can be used in research on inflammatory immune diseases.
    M04
  • HY-P991192
    BI-1808
    		Inhibitor
    BI-1808 is a human IgG1 monoclonal antibody that targets TNFR2by blocking interaction of TNFR2 with ligand TNF-α, confers FcγR-dependent depletion of Treg and mediates expansion of intratumoral CD8+ T cells.
    BI-1808
  • HY-P991179
    MK-4166
    		Agonist
    MK-4166 is a humanized IgG1 agonist monoclonal antibody targeting GITR. MK-4166 enhances the proliferation of both naïve and tumor-infiltrating T lymphocytes.
    MK-4166
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. 
 

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