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-B0679
    Lubiprostone
    Antagonist 99.09%
    Lubiprostone (SPI-0211) increases intestinal fluid secretion through generation of CIC-2/CFTR and activation of cAMP signaling pathway. Lubiprostone inhibits myeloperoxidase (MPO) activity, downregulates Indomethacin (HY-14397)-induced iNOS and TNFα expression. Lubiprostone can be used for chronic constipation research.
    Lubiprostone
  • HY-P991049
    Atrosimab
    Inhibitor 99%
    Atrosimab is an Fv-Fc1K fusion protein with an EC50 value of 0.37 nM against humans. Atrosimab inhibits TNF-induced TNFR1 activation, release of IL-6 and IL-8, and cell death, and alleviates neuroinflammation. Atrosimab is applicable to research related to inflammatory diseases, neurodegenerative diseases, acute and chronic inflammation, experimental arthritis, non-alcoholic steatohepatitis, and experimental autoimmune encephalomyelitis.
    Atrosimab
  • HY-N0212
    Peimine
    Inhibitor 99.9%
    Peimine (Verticine; Dihydroisoimperialine) is an orally active natural product. Peimine has anti-inflammatory, analgesic and cough relieving effects. Peimine can be used in cancer and inflammation related research.
    Peimine
  • HY-B1201
    Tiratricol
    Inhibitor 98.88%
    Tiratricol is an orally available thyroid hormone analog that inhibits pituitary thyroid-stimulating hormone secretion. Tiratricol is an intracellular toxin neutralizer that inhibits LPS and lipid A cytotoxicity with IC50s of 20 μM and 32 μM, respectively. Tiratricol reduces TNF production in lipopolysaccharide-stimulated macrophages. Tiratricol also has antiviral activity and is an inhibitor of yellow fever virus (Flavivirus). It can bind to the RdRp domain of the viral NS5 protein to hinder YFV replication..
    Tiratricol
  • HY-P1068
    Lysozyme
    Inhibitor
    Lysozyme (Muramidase) is a conserved antimicrobial protein. Lysozyme exerts its bactericidal effect by hydrolyzing bacterial cell wall peptidoglycan (PG). Lysozyme plays an important role in limiting bacterial growth on mucosal surfaces and other sites, not only controlling potential pathogens but also limiting overgrowth of microbiota to prevent dysbiosis. Extracellular lysozyme can also degrade polymeric PG into soluble fragments, activate NOD receptors in mucosal epithelial cells, and lead to the secretion of chemokines and activating factors by neutrophils and macrophages.
    Lysozyme
  • HY-P99148
    Anti-Mouse/Rat/Rabbit TNF alpha Antibody (TN3-19.12)
    Inhibitor 99.24%
    Anti-Mouse TNF alpha Antibody (TN3-19.12) is an anti-mouse TNF alpha IgG antibody inhibitor derived from host Armenian Hamster. Anti-Mouse TNF alpha Antibody (TN3-19.12) neutralizes cytotoxic activity in supernatants obtained from LNC-8 cells. Anti-Mouse TNF alpha Antibody (TN3-19.12) reduces the symptoms and severity of EAE (experimental allergic encephalomyelitis) in LNC-8 cells xenograft mice models. Anti-Mouse TNF alpha Antibody (TN3-19.12) prevents diabetes in NOD mice. Anti-Mouse TNF alpha Antibody (TN3-19.12) shows apparent radiosensitizing effect in CD2F1 mice.
    Anti-Mouse/Rat/Rabbit TNF alpha Antibody (TN3-19.12)
  • HY-N9445
    Lacto-N-neotetraose
    99.92%
    Lacto-N-neotetraose (LNnT) is an endogenous metabolite. Lacto-N-neotetraose can inhibit TNF-α induced IL-8 secretion in immature epithelial cells. Lacto-N-neotetraose has anti-inflammatory avtivity, and can improve the wound closure.
    Lacto-N-neotetraose
  • HY-W592871
    10-Hydroxy-2-decenoic acid
    Inhibitor 99.93%
    10-Hydroxy-2-decenoic acid (10-HDA) is an orally active unsaturated medium-chain fatty acid with various physiological activities. 10-Hydroxy-2-decenoic acid induces ROS-mediated apoptosis in A549 cells. 10-Hydroxy-2-decenoic acid inhibits VEGF-induced angiogenesis in human venous endothelial cells. 10-Hydroxy-2-decenoic acid alleviates non-alcoholic fatty liver disease (NAFLD) by activating the AMPK-α signaling pathway. 10-Hydroxy-2-decenoic acid protects against bone loss by inhibiting NF-κB signaling downstream of FFAR4. 10-Hydroxy-2-decenoic acid is an antibiotic against many bacteria and fungi, such as Neurospora sitophila, molds and Staphylococcus aureus. 10-Hydroxy-2-decenoic acid has longevity-promoting effects in C. elegans. 10-Hydroxy-2-decenoic acid prevents osteoarthritis by targeting aspartyl β hydroxylase and inhibiting chondrocyte senescence.
    10-Hydroxy-2-decenoic acid
  • HY-P99845
    Dazodalibep
    99.0%
    Dazodalibep (MEDI 4920; VIB 4920) is a non-antibody fusion protein that targets CD40L. Dazodalibep inhibits the co-stimulatory signals between immune cells (such as T cells, B cells, and antigen-presenting cells), thereby enabling the inhibition of a broader range of cellular and humoral responses. Dazodalibep can be used for research on rheumatoid arthritis and Sjögren's syndrome.
    Dazodalibep
  • HY-P99220
    Tabalumab
    Inhibitor 99%
    Tabalumab (LY2127399) is a human anti-BAFF (B-cell activating factor) monoclonal antibody (IgG4 type) with neutralising activity against membrane bound and soluble BAFF. Tabalumab can be used in studies of autoimmune diseases such as rheumatoid arthritis, renal failure and systemic lupus erythematosus.
    Tabalumab
  • HY-170621
    STAT1/3-IN-1
    Inhibitor 99.23%
    STAT1/3-IN-1 is a potent STAT1/3 inhibitor with potent anti-inflammatory effect. STAT1/3-IN-1 inhibits phosphorylation and nuclear translocation of STAT1/3 to modulate microglial inflammation, reduces LPS (HY-D1056)-induced pro-inflammatory cytokines (NO, IL-1β, IL-6, and TNF-α) and inflammatory mediators (iNOS, COX-2). STAT1/3-IN-1 exhibits low toxicity in mice. STAT1/3-IN-1 can be used for the research of neuroinflammation.
    STAT1/3-IN-1
  • HY-W010201
    Citronellol
    Modulator 98.40%
    Citronellol ((±)-Citronellol) is an orally active inducer of apoptosis. Citronellol can prevent oxidative stress, mitochondrial dysfunction, and apoptosis in the SH-SY5Y cell Parkinson's disease model induced by 6-OHDA by regulating the ROS-NO, MAPK/ERK, and PI3K/Akt signaling pathways. Citronellol can induce necroptosis in human lung cancer cells through the TNF-α pathway and accumulation of ROS. Citronellol can reduce the levels of LC-3 and p62 to regulate the autophagy pathway, inhibit oxidative stress and neuroinflammation, and thus have neuroprotective effects on Parkinson's rats. Citronellol exhibits anti-fungal activity against Trichophyton rubrum by inhibiting ergosterol synthesis.
    Citronellol
  • HY-N2464
    Maltotetraose
    99.88%
    Maltotetraose can serve as a substrate for enzyme-linked assays to measure amylase activity in biological fluids. Maltotetraose has oral active, and reduces TNF-α-induced inflammatory responses by inhibiting NF-κB activity and decreasing ICAM-1 expression. Maltotetraose also inhibits PDGF-induced vascular smooth muscle cell migration and neovascularization. Additionally, Maltotetraose derivatives can function as probes for detecting bacterial infections by targeting the maltodextrin transporter. With good long-term safety, Maltotetraose holds promise for research in atherosclerosis-related diseases.
    Maltotetraose
  • HY-N4100
    Trilobatin
    98.90%
    Trilobatin, a natural sweetener derived from Lithocarpus polystachyus Rehd, Trilobatin is an HIV-1 entry inhibitor targeting the HIV-1 Gp41 envelope. Neuroprotective effects. Trilobatin is also a SGLT1/2 inhibitor that selectively induces the proliferation of human hepatoblastoma cells.
    Trilobatin
  • HY-P990680
    Anti-Mouse CD40 Antibody (FGK4.5/FGK45)
    Inhibitor 98.35%
    Anti-Mouse CD40 Antibody (FGK4.5/FGK45) is an agonistic rat-derived IgG2a monoclonal antibody targeting mouse CD40. Anti-Mouse CD40 Antibody (FGK4.5/FGK45) enhances T cells responses, dendritic cells maturation and NK cells activation. Anti-Mouse CD40 Antibody (FGK4.5/FGK45) can be used for the researches of cancer, infection, inflammation and immunology, such as CT26 tumor, vesicular stomatitis virus (VSV) infection and transplantation.
    Anti-Mouse CD40 Antibody (FGK4.5/FGK45)
  • HY-N0619
    Mulberroside A
    Inhibitor 99.92%
    Mulberroside A is one of the main bioactive constituent in mulberry (Morus alba L.). Mulberroside A decreases the expressions of TNF-α, IL-1β, and IL-6 and inhibits the activation of NALP3, caspase-1, and NF-κB and the phosphorylation of ERK, JNK, and p38, exhibiting anti-inflammatory antiapoptotic effects. Mulberroside A shows inhibitory activity against mushroom tyrosinase with an IC50 of 53.6 μM.
    Mulberroside A
  • HY-107390
    AX-024
    Inhibitor 99.73%
    AX-024 is an orally available, first-in-class inhibitor of the TCR-Nck interaction that selectively inhibits TCR-triggered T cell activation with an IC50 ~1 nM. AX-024 modulates cell signaling by targeting SH3 domains. AX-024 has low-acute toxicity and high potency and selectivity, and strongly inhibit the production of IL-6, TNF-α, IFN-γ, IL-10 and IL-17A.
    AX-024
  • HY-19667A
    BMS-561392 formate
    Inhibitor 99.13%
    BMS-561392 formate (DPC 333 formate) is a selective ADAM17(TACE) inhibitor. BMS-561392 formate inhibits TNF-α secretion by regulating signaling pathways such as p44 MAPK and NF-κB. BMS-561392 formate also affects the survival of central nervous system-related cells including oligodendrocytes and microglia. BMS-561392 formate promotes microglial apoptosis, enlarges the injury area and exacerbates astrogliosis in a mouse spinal cord injury model. BMS-561392 formate can be used in research related to spinal cord injury and inflammatory diseases.
    BMS-561392 formate
  • HY-N6607
    Tryptanthrin
    Modulator 99.89%
    Tryptanthrin is an indole quinazoline that could be an alkaloid from indigo-bearing plants. Tryptanthrin is a potent and orally active cellular Leukotriene (LT) biosynthesis inhibitor. Tryptanthrin has anticancer activity. Tryptanthrin suppresses the expression levels of NOS1, COX-2, and NF-κB and regulates the expression levels of IL-2, IL-10, and TNF-α.
    Tryptanthrin
  • HY-N0512
    Loganin
    Inhibitor 99.85%
    Loganin is a type of iridoid glycoside compound that possesses anti-inflammatory, antioxidant, and antitumor properties, and offers protective effects against acute lung injury and pulmonary fibrosis. Loganin exerts its protective effects against LPS (HY-D1056)-mediated inflammation and oxidative stress by upregulating the Nrf2/HO-1 signaling pathway, and it reduces neuroinflammation caused by spinal cord injury (SCI).
    Loganin
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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