1. Signaling Pathways
  2. Apoptosis
  3. TNF Receptor

TNF Receptor

Tumor Necrosis Factor Receptor; TNFR

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.

Cat. No. Product Name Effect Purity Chemical Structure
  • HY-13743
    Roquinimex
    Inhibitor 99.69%
    Roquinimex (Linomide) is an orally active immunomodulator with antineoplastic, anti-inflammatory, and antiangiogenic activity. Roquinimex suppresses TH1 lymphocyte cytokines (IL-2, IFN-γ), promotes TH2 lymphocyte cytokines (IL-4, IL-10), increases NK cell, activated monocyte, and T cell activity. Roquinimex blocks macrophage TNF-α production and suppresses IL-1/IL-6 secretion. Roquinimex exhibits in vivo antitumour activity, suppresses rodent autoimmune disease signs, and ameliorates murine colitis and psoriasis. Roquinimex can be used for the research of leukemia, inflammatory bowel disease, multiple sclerosis, and psoriasis.
    Roquinimex
  • HY-175222
    GlcNAc-MurNAc
    Inhibitor
    GlcNAc-MurNAc, a disaccharide, is a TLR4 agonist with a Kd of 383 μM for murine TLR4. GlcNAc-MurNAc directly binds to TLR4 and activates its downstream NF-κB and IRF pathways. GlcNAc-MurNAc improves Dextran sulfate sodium salt (DSS) (HY-116282C)-induced colitis in mice through a TLR4-dependent mechanism. GlcNAc-MurNAc can be used for the study of inflammatory bowel disease.
    GlcNAc-MurNAc
  • HY-W002199
    6:2 Fluorotelomer alcohol
    Inhibitor 99.96%
    6:2 Fluorotelomer alcohol (6:2 FTOH) is an orally active, blood-brain barrier-permeable modulator of cyclin D1 and ETS1. 6:2 Fluorotelomer alcohol downregulates cyclin D1 expression, upregulates ETS1 via the TNF-α/ERK 1/2 pathway, impairs mitochondrial membrane potential and respiratory function, increases reactive oxygen species levels, disrupts calcium homeostasis and activates endoplasmic reticulum stress markers, and induces cell proliferation inhibition and endothelial-mesenchymal transition. Furthermore, 6:2 Fluorotelomer alcohol induces morphological abnormalities in zebrafish embryos and liver developmental damage, while disrupting the brain immune microenvironment in mice, causing systemic toxicity and delayed pup maturation in CD-1 mice. 6:2 Fluorotelomer alcohol also induces cortical neuron apoptosis, glial cell activation, synaptic abnormalities, colonic barrier damage, intestinal dysbiosis and autism spectrum disorder-like symptoms in mice. 6:2 Fluorotelomer alcohol shows no mutagenic, clastogenic, primary skin/eye irritation or skin sensitizing effects, exhibits no selective reproductive toxicity in CD-1 mice, and is classified as GHS Category 4 for acute oral toxicity. 6:2 Fluorotelomer alcohol can be used in studies of neurodevelopmental disorders and autism spectrum disorders.
    6:2 Fluorotelomer alcohol
  • HY-107352
    Fosfenopril
    Inhibitor 99.85%
    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
  • HY-N7012
    7,3',4'-Tri-O-methylluteolin
    Inhibitor 99.28%
    7,3',4'-Tri-O-methylluteolin (5-Hydroxy-3',4',7-trimethoxyflavone) is a flavonoid with multiple biological activities. 7,3',4'-Tri-O-methylluteolin inhibits soybean lipoxygenase (LOX), with an IC50 value of 23.97 µg/mL. 7,3',4'-Tri-O-methylluteolin possesses anti-inflammatory effects in Lipopolysaccharides (HY-D1056) (LPS)-induced RAW 264.7 macrophages. 7,3',4'-Tri-O-methylluteolin inhibits the binding of MDM2 with p53 and induces apoptosis in MCF-7 breast cancer cells. 7,3',4'-Tri-O-methylluteolin also has antioxidant, antifungal and antitrypanosomal activitiessup>[4]sup>[5].
    7,3',4'-Tri-O-methylluteolin
  • HY-P99669
    Iratumumab
    Inhibitor 98.95%
    Iratumumab (MDX-060) a human anti-CD30 IgG1κ monoclonal antibody. Iratumumab inhibits the growth of CD30-expressing tumor cells. Iratumumab can be used for research of Hodgkin's lymphoma (HL) and anaplastic large-cell lymphoma (ALCL).
    Iratumumab
  • HY-P99563
    Tibulizumab
    Inhibitor 98.86%
    Tibulizumab (LY 3090106) is a tetravalent bispecific monoclonal antibody targeting B-cell activating factor (BAFF) and IL-17A with Kd values of 60 pM and 14 pM, respectively. Tibulizumab can be used for autoimmune disease research.
    Tibulizumab
  • HY-N1940
    β-Anhydroicaritin
    Inhibitor 99.69%
    β-Anhydroicaritin is isolated from Boswellia carterii Birdware, has important biological and pharmacological effects, such as antiosteoporosis, estrogen regulation and antitumor properties. β-Anhydroicaritin ameliorates the degradation of periodontal tissue and inhibits the synthesis and secretion of TNF-α and MMP-3 in diabetic rats. β-Anhydroicaritin decreases the overproduction of NO, IL-10, TNF-α, MCP-1 and IL-6 in inperitonitis mice. β-Anhydroicaritin inhibits the elevation of intracellular Ca2+, and markedly decreases iNOS protein expression.
    β-Anhydroicaritin
  • HY-N0412
    Sesamoside
    Inhibitor 99.77%
    Sesamoside is an orally active anti-inflammatory, anti-hypoxic and analgesic agent. Sesamoside inhibits the phosphorylation of ERK and JNK, downregulates NLRP3 expression, restricts the nuclear localization of P65, regulates AKR1B1 expression, and reduces the expression of TRPV1 gene in the spinal cord. Sesamoside reduces the production of TNF-α, IL-6, IL-1β, iNOS and NO, restores cellular metabolism and organ function, and alleviates cold and mechanical hyperalgesia. Sesamoside can be used in research related to septic shock, high-altitude pulmonary edema and neuropathic pain.
    Sesamoside
  • HY-155751
    HMGB1-IN-1
    Inhibitor 98.40%
    HMGB1-IN-1 (compound 6) displays strong NO inhibitory effect in RAW264.7 cells with IC50 value of 15.9 ± 0.6 μM. HMGB1-IN-1 inhibit the HMGB1/NF-κB/NLRP3 pathway. HMGB1-IN-1 shows good anti-inflammatory activity and good anti-sepsis effects in kidney injury.
    HMGB1-IN-1
  • HY-172458
    Z-3578
    Inhibitor 98.72%
    Z-3578 is an orally active small-molecule antagonist of MrgX2 with potent antipseudoallergic activity, exhibiting a KD value of 729 nM. Z-3578 effectively inhibits mast cell degranulation induced by substance P (SP) and C48/80, suppresses the release of β-hexosaminidase, significantly reduces the release of histamine and TNF-α, and decreases intracellular calcium flux. In a mouse pseudoallergy model, Z-3578 significantly alleviates paw swelling and dye extravasation, and reduces serum histamine levels. Z-3578 can be used for the study of pseudoallergic reactions.
    Z-3578
  • HY-16363
    Omtriptolide
    Inhibitor
    Omtriptolide (PG490-88) is a derivative proagent of triptolide purified from the Chinese herb.
    Omtriptolide
  • HY-W923189
    Neral
    Inhibitor
    Neral is a plant-derived anti-inflammatory, antioxidant and anticancer agent. Neral inhibits the phosphorylation of ERK1/2, p38 MAPK and IκB in macrophages induced by LPS (HY-D1056), suppresses the secretion of TNF-α and IL-6, as well as the expression of pro-IL-1β, iNOS and COX-2 in cells, and reduces the production of ROS in cells. Neral inhibits the activation of the NLRP3 inflammasome, and decreases the activation of caspase-1 and the secretion of IL-1β in mouse macrophages. Neral induces autophagy, and exhibits antiproliferative activity both in in vitro breast cancer cell models and mouse xenograft models. Neral regulates brassinosteroid, jasmonic acid and ethylene signaling pathways, and induces the expression of AP2/ERF-ERF and bHLH family genes in rice roots. Neral acts as a herbicide safener, alleviates the damage induced by Fenoxaprop-P-ethyl (HY-B2013), and promotes the elongation of rice roots. Neral can be used in research related to breast cancer, inflammatory and immune system diseases, and herbicide safeners.
    Neral
  • HY-N0247
    Saikosaponin B1
    Inhibitor 99.42%
    Saikosaponin B1 is a bioactive constituent of Radix Bupleuri. Saikosaponin B1 is an agonist of the 5-HT2C receptor with an EC50 of 147.41 μM. Saikosaponin B1 inhibits the Hedgehog (Hh) signaling pathway by targeting the transmembrane protein SMO. Sailosaponin B1 can reduce liver fibrosis. Saikosaponin B1 has anti-cancer activities thus can be studies in research for cancers such as Medulloblastoma (MB).
    Saikosaponin B1
  • HY-P991490
    ISB2001
    Inhibitor 99.17%
    ISB2001 is a trispecific antibody targeting CD38, CD3 and BCMA. ISB2001 effectively counteracts tumor immune escape mechanisms caused by antigen downregulation, antigen loss, soluble factor competition and other factors. ISB2001 is applicable to relevant research on multiple myeloma and relapsed/refractory multiple myeloma.
    ISB2001
  • HY-113402R
    Gamma-glutamylcysteine (Standard)
    Inhibitor
    Gamma-glutamylcysteine (Standard) is the analytical standard of Gamma-glutamylcysteine. This product is intended for research and analytical applications. Gamma-glutamylcysteine (γ-Glu-Cys) is an orally active, blood-brain barrier permeable dipeptide. Gamma-glutamylcysteine activates AMPK, SIRT1, IL-4/STAT6, AC/cAMP/PI3K, IGF-1R/IRS1/PI3K, and Nrf2 signaling pathways; it inhibits NF-κB, JAK1/STAT1/3, MAPKs, cadmium-induced p38 MAPK, JNK, and PI3K/Akt signaling pathways. Gamma-glutamylcysteine regulates macrophage polarization, modulates the trafficking of CD36 and GLUT4, induces glutathione synthesis, improves metabolic dysfunction, reduces lipid deposition, ameliorates glucose homeostasis, inhibits apoptosis (Apoptosis), stabilizes mitochondria, suppresses lipid peroxidation, iron accumulation and ferroptosis (Ferroptosis), reduces ds-HMGB1 levels, reverses mechanical hyperalgesia, and alleviates hepatic lipid droplet formation. Gamma-glutamylcysteine is applicable to research related to inflammatory bowel disease, type 2 diabetes, cadmium-induced neurotoxicity, Alzheimer's disease, cerebral ischemia/reperfusion injury, neuropathy, and alcoholic liver disease.
    Gamma-glutamylcysteine (Standard)
  • HY-P99015
    Dacetuzumab
    Inhibitor
    Dacetuzumab (SGN-40) is a humanized IgG1, anti-CD40 monoclonal antibody with anti-lymphoma activity. Dacetuzumab kills tumor cells via immune effector functions (antibody-dependent cellular cytotoxicity and phagocytosis [ADCC/ADCP]). Dacetuzumab ((SGN-40) can be used for multiple myeloma research.
    Dacetuzumab
  • HY-111326A
    Naphazoline nitrate
    Inhibitor 99.12%
    Naphazoline (Naphthazoline) nitrate is an α-adrenergic receptor agonist. Naphazoline nitrate reduces vascular hyperpermeability and promotes vasoconstriction. Naphazoline nitrate reduces the levels of inflammatory factors (TNF-α, IL-1β and IL-6), cytokines (IFN-γ and IL-4), IgE, GMCSF, and NGF. Naphazoline nitrate can be used for non-bacterial conjunctivitis research.
    Naphazoline nitrate
  • HY-N9315
    Episappanol
    Inhibitor 98.80%
    Episappanol is a natural compound isolated from Caesalpinia sappan heartwood with anti-inflammatory activity. Episappanol significantly inhibits the IL-6 and TNF-α secretion.
    Episappanol
  • HY-164102
    TNF-α-IN-18
    Inhibitor 98.94%
    TNF-α-IN-18 (Compound 61) is an inhibitor for TNF-α (IC50 of 1.8 μM), that inhibits TNF signaling pathway through block of NF-kB migration from cytoplasm to nucleus. TNF-α-IN-18 exhibits slight cytotoxicity to mouse fibroblast LM cell, with a CC50 >50 μM. TNF-α-IN-18 ameliorates the TNF- or Lipopolysaccharide (HY-D1056)-induced sepsis in mouse models. TNF-α-IN-18 protects mice from rheumatoid arthritis.
    TNF-α-IN-18
Cat. No. Product Name / Synonyms Species Source
Cat. No. Product Name / Synonyms Application Reactivity

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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