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-114573
    TNF-α-IN-19
    		Inhibitor
    TNF-α-IN-19 is an inhibitor of TNFα that can block the interaction between TNFαRI, TRADD, and RIP1, the EC50 values for TNFα, IL-1β, and IL-1β/TNFα are 2.451, 3.792 and 1.54 μM, respectively. TNF-α-IN-19 only inhibits the degradation of IκBα when cells are stimulated by TNFα and not by IL-1β.
    TNF-α-IN-19
  • HY-176274
    FASN/SCD-IN-1
    		Inhibitor
    FASN/SCD-IN-1 is a Silybin (HY-N0779A) derivative, an orally active inhibitor of Fatty Acid Synthase (FASN)/Stearoyl-CoA Desaturase (SCD). FASN/SCD-IN-1 has shown in vitro activity in inhibiting lipid deposition, reducing FASN and SCD transcriptional levels, and exhibiting antioxidant, anti-inflammatory, and anti-fibrotic activities. FASN/SCD-IN-1 has demonstrated significant hepatoprotective effects in a rat model of acute liver injury. FASN/SCD-IN-1 ameliorates the pathological features of MASH liver, including steatosis, inflammation, and fibrosis in a mouse model of myeloproliferative steatohepatitis (MASH). FASN/SCD-IN-1 can be used to study MASH.
    FASN/SCD-IN-1
  • HY-143410
    Anti-inflammatory agent 16
    		Inhibitor
    Anti-inflammatory agent 16 (compound 14), a peptidomimetic, shows potent anti-inflammatory activity. Anti-inflammatory agent 16 reduces TNFα, NO, CD40 and CD86 expression level.
    Anti-inflammatory agent 16
  • HY-N0472R
    Geraniin (Standard)
    		Inhibitor
    Geraniin (Standard) is the analytical standard of Geraniin. This product is intended for research and analytical applications. Geraniin is a TNF-α releasing inhibitor with numerous activities including anticancer, anti-inflammatory, and anti-hyperglycemic activities, with an IC50 of 43 μM.
    Geraniin (Standard)
  • HY-180155
    Keap1/Nrf2/ARE activator 2
    		Inhibitor
    Keap1/Nrf2/ARE activator 2 is an activator of Keap1/Nrf2/ARE pathway and non-competitively inhibits AChE with an IC50 of 14.79 μM and a Ki of 1.35 μM. Keap1/Nrf2/ARE activator 2 promotes Nrf2 nuclear translocation, leading to antioxidant gene upregulation and enhanced cellular defense against oxidative stress. Keap1/Nrf2/ARE activator exhibits robust neuroprotection against both H2O2- and Scopolamine (SCA) (HY-N0296)-induced injury in PC12 cells. Keap1/Nrf2/ARE activator 2 ameliorates memory impairment and the neuro-inflammation associated with SCA-initiated cognitive dysfunction in a zebrafish model. Keap1/Nrf2/ARE activator 2 can be used for the research of Alzheimer's disease.
    Keap1/Nrf2/ARE activator 2
  • HY-153330
    TNF-α-IN-10
    		Inhibitor
    TNF-α-IN-10 (compound 8a) is a IL-6 and TNF-α inhibitor. TNF-α-IN-10 shows anti-inflammatory activity.
    TNF-α-IN-10
  • HY-162641
    AF-45
    		Inhibitor
    AF-45 inhibits IRAK4 and IRAK1, with IC50s of 128 nM and 1765 nM. AF-45 inhibits the release of IL-6 and TNF-α in macrophages, with IC50s of 0.53-1.54 μM and 0.6-2.75 μM. AF-45 is also an inhibitor for NF-κB/MAPK signaling pathway. AF-45 exhibits anti-inflammatory activities against DSS-induced ulcerative colitis and Lipopolysaccharide (HY-D1056)-induced acute lung injury in mouse model. AF-45 exhibits good pharmacokinetic characteristics in rat models.
    AF-45
  • HY-181818
    4,5-Dehydro-6-oxoallosecurinine
    		Inhibitor
    4,5-Dehydro-6-oxoallosecurinine is a Keap1-Nrf2 pathway activator. 4,5-Dehydro-6-oxoallosecurinine promotes the nuclear translocation of Keap1-Nrf2, and induces the expression of antioxidant and cytoprotective genes. 4,5-Dehydro-6-oxoallosecurinine reduces the production of NO, and decreases the levels of iNOS, TNF-α, IL-6 and IL-1β in LPS-stimulated microglia. 4,5-Dehydro-6-oxoallosecurinine can be used for the research of neurodegenerative diseases.
    4,5-Dehydro-6-oxoallosecurinine
  • HY-B0513R
    Methylthiouracil (Standard)
    		Inhibitor
    Methylthiouracil (Standard) is the analytical standard of Methylthiouracil. This product is intended for research and analytical applications. Methylthiouracil is an antithyroid agent. Methylthiouracil suppresses the production TNF-α and IL-6, and the activation of NF-κB and ERK1/2.
    Methylthiouracil (Standard)
  • HY-107352R
    Fosfenopril (Standard)
    		Inhibitor
    Fosfenopril (Standard) is the analytical standard of Fosfenopril. This product is intended for research and analytical applications. Fosfenopril (Fosinoprilat) is a potent angiotensin converting enzyme (ACE) inhibitor. Fosfenopril alleviates lipopolysaccharide (LPS)-induced inflammation by inhibiting TLR4/NF-κB signaling in monocytes.
    Fosfenopril (Standard)
  • HY-N12042
    Taxamairin B
    		Inhibitor
    Taxamairin B is a potent anti-inflammatory agent. Taxamairin B decreases proinflammatory cytokines (TNF-α, IL-1β and IL-6) expression and the production of NO and ROS in LPS-induced RAW264.7 cells. Taxamairin B exhibits significant protective effects in LPS-induced acute lung injury in mice.
    Taxamairin B
  • HY-178447
    PPARγ agonist 20
    		Inhibitor
    PPARγ agonist 20 is a potent, orally active PPAR-γ agonist. PPARγ agonist 20 effectively increases antioxidant defenses (SOD, GSH) and reduces lipid peroxidation. PPARγ agonist 20 can upregulate of Pparg, Glut4, and AdipoQ, suppresses of TNF-α, IL-6, and NF-κB p65. PPARγ agonist 20 significantly lowers fasting blood glucose, improving glucose tolerance, and restoring metabolic balance in Streptozotocin (HY-13753)-Nicotinamide (HY-B0150)-induced diabetic rats. PPARγ agonist 20 can be used for the study of type 2 diabetes.
    PPARγ agonist 20
  • HY-147697
    LSD1-IN-21
    		Inhibitor
    LSD1-IN-21 (compound 5a) is a potent and BBB-penetrated LSD1 (Lysine specific demethylase-1) inhibitor, with an IC50 of 0.956 µM. LSD1-IN-21 significantly reduces the pro-inflammatory cytokine TNF-α. LSD1-IN-21 shows good anticancer and anti-inflammatory activity.
    LSD1-IN-21
  • 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-118646
    NS-6740
    		Inhibitor
    NS-6740 is a partial agonist of α7 nicotinic acetylcholine receptor (α7 nAChR) with an IC50 of 3 nM. NS-6740 also acts as a potent modulator of the cholinergic anti-inflammatory pathway. NS-6740 alters the signaling pattern of α7 in an ion channel-independent manner, thereby reducing synaptic function. NS-6740 induces the desensitized state of α7 nAChR. NS-6740 generates robust nAChR-mediated currents. NS-6740 reduces LPS (HY-D1056)-induced TNF-α release from microglia. NS-6740 can be used in the research of neuroinflammation and neuropathic pain.
    NS-6740
  • HY-181657
    EGFR-IN-200
    		Inhibitor
    EGFR-IN-200 is an inhibitor targeting EGFR, TNF-α, and the IL-6/GP130 complex, which potently targets human EGFR (IC50=0.03 μM), TNF-α (IC50=3.1 μM), and the IL-6/GP130 complex (IC50=1.6 μM). EGFR-IN-200 binds to the ATP pocket of EGFR, the trimer interface of TNF-α, and the cytokine-receptor interface of IL-6/GP130, induces G2/M cell cycle arrest, apoptosis, and antiproliferative activity. EGFR-IN-200 exhibits high gastrointestinal absorbability, low BBB permeability, and complies with the Lipinski's rule. EGFR-IN-200 can be used for the research of lung cancer and breast adenocarcinoma.
    EGFR-IN-200
  • HY-179645
    Phosphodiesterase-IN-5
    		Inhibitor
    Phosphodiesterase-IN-5 is a potent, orally active and selective phosphodiesterase 10A (PDE10A) inhibitor with an IC50 of 6.2 nM. Phosphodiesterase-IN-5 shows >1612-fold selectivity over other PDEs. Phosphodiesterase-IN-5 exhibits potent antifibrotic efficacy in a Bleomycin (BLM) (HY-108345)-induced murine model of pulmonary fibrosis (PF) by blocking myofibroblast differentiation via the cAMP/PKA/CREB signaling pathway. Phosphodiesterase-IN-5 can be used for the research of PF.
    Phosphodiesterase-IN-5
  • HY-160434
    TNF-α-IN-13
    		Inhibitor
    TNF-α-IN-13 is a potent TNFα inhibitor with an IC50 of <0.6 μM. TNF-α-IN-13 has antiinflammatory properties (WO2001072735A2; example 6).
    TNF-α-IN-13
  • HY-181612
    COX-2/CaV2.2-IN-1
    		Inhibitor
    COX-2/CaV2.2-IN-1 is an orally active and selective dual COX-2/CaV2.2 inhibitor, exhibiting a COX-2 IC50 of 0.26 μM and a CaV2.2 IC50 of 0.29 μM. COX-2/CaV2.2-IN-1 suppresses inflammatory responses and inflammatory mediator (IL-6, TNF-α, NO) production. COX-2/CaV2.2-IN-1 produces pronounced analgesic effects in diverse models of inflammatory, neuropathic, and visceral pain. COX-2/CaV2.2-IN-1 can be used for the research of chronic pain.
    COX-2/CaV2.2-IN-1
  • HY-171895
    12-Nitrolinoleate
    		Inhibitor
    12-Nitrolinoleate (12-Nitro-9-cis,12-cis-octadecadienoic acid) is an activator for peroxisome proliferator-activated receptor γ (PPARγ). 12-Nitrolinoleate is a nitrated form of linoleic acid. 12-Nitrolinoleate can be formed upon exposure to acidified nitrate and found in human red blood cells and plasma. 12-Nitrolinoleate can activate PPARγ-dependent gene expression in MCF-7 cells expressing PPARγ with an EC50 = 0.045 μM. 12-Nitrolinoleate is able to inhibit LPS (HY-D1056)-induced NF-κB transcription in RAW 264.7 cells. 12-Nitrolinoleate can inhibit IL-6, TNF-α and CCL2 induced by LPS.
    12-Nitrolinoleate
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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