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-11109
    Resatorvid
    Inhibitor 99.95%
    Resatorvid (TAK-242) is a selective Toll-like receptor 4 (TLR4) inhibitor. Resatorvid inhibits NO, TNF-α and IL-6 production with IC50s of 1.8 nM, 1.9 nM and 1.3 nM, respectively. Resatorvid downregulates expression of TLR4 downstream signaling molecules MyD88 and TRIF. Resatorvid inhibits autophagy and plays pivotal role in various inflammatory diseases.
    Resatorvid
  • HY-P9908
    Adalimumab
    Inhibitor 99.62%
    Adalimumab is a human monoclonal IgG1 antibody targeting tumour necrosis factor α (TNF-α).
    Adalimumab
  • HY-100573
    Necrosulfonamide
    Inhibitor 99.47%
    Necrosulfonamide is a MLKL and Gasdermin D (GSDMD) inhibitor, capable of separately inhibiting necroptosis and pyroptosis of cells. Necrosulfonamide does not affect the activation of upstream signals, but specifically inhibits the downstream executor oligomerization step. Necrosulfonamide reduces the expression of the key kinases NLRP3 and caspase-1 involved in necroptosis and pyroptosis, activate the Nrf2 pathway and the downstream antioxidant enzymes, and also downregulates a variety of inflammatory factors. Necrosulfonamide plays significant roles in various diseases such as neurodegenerative diseases (such as Parkinson’s disease), tissue damage and ischemia-reperfusion injury, inflammatory bowel disease, osteoarthritis and fracture repair, and hair loss by regulating two important programmed necrosis pathways.
    Necrosulfonamide
  • HY-N0822
    Shikonin
    Inhibitor 99.80%
    Shikonin is a major component of a Chinese herbal medicine named zicao. Shikonin is a potent TMEM16A chloride channel inhibitor with an IC50 of 6.5 μM. Shikonin is a specific pyruvate kinase M2 (PKM2) inhibitor and can also inhibit TNF-α and NF-κB pathway. Shikonin decreases exosome secretion through the inhibition of glycolysis. Shikonin inhibits AIM2 inflammasome activation.
    Shikonin
  • HY-P9970
    Infliximab
    Inhibitor
    Infliximab (Avakine) is a chimeric monoclonal IgG1 antibody that specifically binds to TNF-α. Infliximab prevents the interaction of TNF-α with TNF-α receptor (TNFR1 and TNFR2). Infliximab has the potential for autoimmune, chronic inflammatory diseases and diabetic neuropathy research.
    The component ratio of this product is Active ingredient : Excipients = 9 : 47.
    Infliximab
  • HY-15615A
    Dordaviprone
    Agonist 99.89%
    Dordaviprone (TIC10) is a potent, orally active, and stable tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) inducer which acts by inhibiting Akt and ERK, consequently activating Foxo3a and significantly inducing cell surface TRAIL. Dordaviprone can cross the blood-brain barrier.
    Dordaviprone
  • HY-178037A
    TLR9 antagonist 1 diformate
    Inhibitor
    TLR9 antagonist 1 diformate is a selective hTLR9 antagonist with an IC50 of 0.1 nM against hTLR9. TLR9 antagonist 1 diformate exhibits favorable pharmacokinetic and pharmacodynamic properties. TLR9 antagonist 1 diformate can be used in the research of systemic lupus erythematosus.
    TLR9 antagonist 1 diformate
  • HY-179715
    PROTAC JAK1/2 degrader-1
    Inhibitor 99.47%
    PROTAC JAK1/2 degrader-1 (Compound A8) is a selective JAK1/2 PROTAC degrader, with DC50 values of 1.4 μM for JAK1 and 0.92 μM for JAK2. PROTAC JAK1/2 degrader-1 significantly inhibits the release of NO, IL-6 (IC50 = 12.89 μM) and TNF-α (IC50 = 17.17 μM). PROTAC JAK1/2 degrader-1 significantly alleviates inflammatory responses and colonic damage by inhibiting the JAK/STAT3 signaling pathway. PROTAC JAK1/2 degrader-1 can be used for research on colitis. (Pink: JAK1/2 ligand (HY-179716); Blue: CRBN ligand (HY-10984); Black: linker; CRBN ligand + linker (HY-131888A)).
    PROTAC JAK1/2 degrader-1
  • HY-P990007
    Tulisokibart
    Inhibitor 99.00%
    Tulisokibart (PRA023) is a humanized IgG1-κ monoclonal antibody. Tulisokibart targets to TNFSF15/TL1A. Tulisokibart can be used to study a variety of inflammatory/fibrotic diseases, such as Crohn's Disease (CD) and ulcerative colitis.
    Tulisokibart
  • HY-108847
    Etanercept
    Inhibitor 99.20%
    Etanercept, a dimeric fusion protein that binds TNF, acts as a TNF inhibitor. Etanercept competitively inhibits the binding of both TNF-α and TNF-β to cell surface TNF receptors, rendering TNF biologically inactive. Etanercept shows efficacy against rheumatoid arthritis, juvenile idiopathic arthritis, and plaque psoriasis.
    Etanercept
  • HY-107632
    GYY4137
    Inhibitor 98.08%
    GY4137 is a sustained-release H2S donor possessing vasodilatory, antihypertensive, and anti-inflammatory activities. GY4137 can inhibit cell growth, induce apoptosis, and cause cell cycle arrest by blocking the STAT3 pathway, demonstrating potent anticancer activity.
    GYY4137
  • HY-N0171A
    Beta-Sitosterol (purity>98%)
    Inhibitor 99.74%
    Beta-Sitosterol (purity>98%) is orally active. Beta-Sitosterol exhibits multiple activities, including anti-inflammatory, anticancer, antioxidant, antimicrobial, antidiabetic, antioxidant enzyme, and analgesic. Beta-Sitosterol inhibits inflammation and impaired adipogenesis in bovine mammary epithelial cells by reducing levels of ROS, TNF-α, IL-1β, and NF-κB p65 and restoring the activity of the HIF-1α/mTOR signaling pathway. Beta-Sitosterol induces apoptosis in cancer cells through ROS-mediated mitochondrial dysregulation and p53 activation. Beta-Sitosterol exerts its anticancer effects in cancer cells by activating caspase-3, caspase-8, and caspase-9, mediating PARP inactivation, MMP loss, altered Bcl-2-Bax ratio, and cytochrome c release. Beta-Sitosterol modulates macrophage polarization and reduces rheumatoid inflammation in mice. Beta-Sitosterol inhibits tumor growth in multiple mouse cancer models. Beta-Sitosterol can be used in the research of arthritis, lung cancer, breast cancer and other cancers, diabetes, etc.
    Beta-Sitosterol (purity>98%)
  • HY-N0182
    Fisetin
    Inhibitor 99.99%
    Fisetin is a natural flavonol found in many fruits and vegetables with various benefits, such as antioxidant, anticancer, neuroprotection effects.
    Fisetin
  • HY-P0224
    N-Formyl-Met-Leu-Phe
    Inhibitor 99.90%
    N-Formyl-Met-Leu-Phe (fMLP; N-Formyl-MLF) is a chemotactic peptide and a specific ligand of N-formyl peptide receptor (FPR). N-Formyl-Met-Leu-Ph is reported to inhibit TNF-alpha secretion.
    N-Formyl-Met-Leu-Phe
  • HY-P1860
    TNF-α (31-45), human
    Activator 99.99%
    TNF-α (31-45), human is a potent NF-kB pathway activator. TNF-αis a proinflammatory cytokine that induces necrosis or apoptosis. TNF alpha stimulates NF-κB pathway via TNFR2 promotes cancer growth, invasion, and metastasis.
    TNF-α (31-45), human
  • HY-N0262
    Cordycepin
    99.80%
    Cordycepin (3'-Deoxyadenosine) is a nucleoside derivative and inhibits IL-1β-induced MMP-1 and MMP-3 expression in rheumatoid arthritis synovial fibroblasts (RASFs) in a dose-dependent manner. Cordycepin kills Mycobacterium tuberculosis through hijacking the bacterial adenosine kinase.
    Cordycepin
  • HY-P990006
    Duvakitug
    Inhibitor 99.76%
    Duvakitug (TEV-48574) is a humanized IgG1-λ2 monoclonal antibody targeting to TNFSF15/TL1A. Duvakitug' main expression system is CHOK1SV cells endogenously expressing glutamine synthetase (GS). Duvakitug can be used in the study of Crohn's Disease (CD).
    Duvakitug
  • HY-126360
    Oxazolone
    Activator 98.0%
    Oxazolone is a haptenizing agent that induces acute or chronic inflammation of the large intestine and is used to construct models of colitis. Oxazolone can cause Th1/Th2-dependent colitis with weight loss and diarrhea. Oxazolone-induced inflammation can be mitigated by neutralizing anti-IL-4 or anti-TNF-α antibodies or decoy IL-13R2-α-FC proteins.
    Oxazolone
  • HY-P99055
    Urelumab
    99.33%
    Urelumab, a fully human, non-ligand binding, CD137 agonist IgG4 monoclonal antibody, enhances T-cell and natural killer-cell antitumor activity, and may enhance cytotoxic activity of Rituximab (HY-P9913). Urelumab can be used for the research of diffuse large B-cell lymphoma (DLBCL), follicular lymphoma (FL), and other types of non-Hodgkin lymphoma (NHL).
    Urelumab
  • HY-B0113
    Omeprazole
    99.96%
    Omeprazole (H 16868) is an orally active H+,K+-ATPase inhibitor and a proton pump inhibitor. Omeprazole competitively inhibits CYP2C19, CYP3A4, and CYP2C9 activity. Omeprazole inhibits gastric acid secretion and can be used for acid-related gastrointestinal disorders. Omeprazole inhibits pancreatic cancer cell proliferation, induces apoptosis, autophagosome accumulation (elevated LC3-I and LC3-II levels), oxidative stress, and cytogenetic imbalance, modulates lysosomal transport, reduces inflammatory cytokines. Omeprazole alters small intestinal morphology and magnesium absorption, and induces gastric mucosa morphologic changes. Omeprazole aslo has neuroprotective and antibacterial effects.
    Omeprazole
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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