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-107390
    AX-024
    Inhibitor 99.29%
    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-15790
    Elobixibat
    Inhibitor 99.91%
    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
  • HY-N0368
    Linalool
    98.55%
    Linalool is a natural monoterpene which is a competitive NMDA receptor antagonist. Linalool is orally active and crosses the blood-brain barrier. Linalool has anticancer, antibacterial, anti-inflammatory, neuroprotective, anxiolytic, antidepressant, anti-stress, cardioprotective, hepatoprotective, nephroprotective and pulmonary protective activities.
    Linalool
  • HY-N0212
    Peimine
    Inhibitor 99.43%
    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-W010201
    Citronellol
    Modulator 98.60%
    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-B1201
    Tiratricol
    Inhibitor 99.60%
    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-N2350
    Cynaropicrin
    Inhibitor 99.79%
    Cynaropicrin is a sesquiterpene lactone which can inhibit tumor necrosis factor (TNF-α) release with IC50s of 8.24 and 3.18 μM for murine and human macrophage cells, respectively. Cynaropicrin also inhibits the increase of cartilage degradation factor (MMP13) and suppresses NF-κB signaling.
    Cynaropicrin
  • HY-N2119
    Sciadopitysin
    ≥99.0%
    Sciadopitysin is a type of biflavonoids in leaves from ginkgo biloba. Sciadopitysi inhibits RANKL-induced osteoclastogenesis and bone loss by inhibiting NF-κB activation and reducing the expression of c-Fos and NFATc1.
    Sciadopitysin
  • HY-N0507
    Rosavin
    Inhibitor 99.99%
    Rosavin, an orally bioactive phenylpropanoid from Rhodiola rosea L. (RRL), is an adaptogen that enhances the body’s response to environmental stress. Rosavin significantly influences bone tissue metabolism by inhibiting osteoclastogenesis and promoting osteoblast differentiation, also impacts various diseases, demonstrating antidepressant, adaptogenic, and anxiolytic effects in mouse models. Additionally, Rosavin improves survival, reducing intestinal damage in irradiated rats and Ischemia-reperfusion(I/R)-induced cerebral injury in vivo by regulating inflammation and oxidative stress, making it a promising candidate for research in radiation-induced intestinal injury, I/R-induced cerebral injury and osteoporosis.
    Rosavin
  • HY-134240
    L-Threonic acid magnesium
    Antagonist ≥99.0%
    L-Threonic acid magnesium salt is the enantiomer of Threonic acid and a metabolite of vitamin C. L-Ascorbic acid (L-Ascorbate), an electron donor, is an endogenous antioxidant agent. L-Threonic acid magnesium is a magnesium supplementation, that improves the brain magnesium concentration, inhibits the activation of TNF-α/NF-κB signaling pathway. L-Threonic acid magnesium can be used in research of Alzheimer’s disease. L-Threonic acid magnesium salt is orally active.
    L-Threonic acid magnesium
  • HY-N0569
    Madecassic acid
    Inhibitor 99.81%
    Madecassic acid is isolated from Centella asiatica (Umbelliferae). Madecassic acid has anti-inflammatory properties caused by iNOS, COX-2, TNF-alpha, IL-1beta, and IL-6 inhibition via the downregulation of NF-κB activation in RAW 264.7 macrophage cells.
    Madecassic acid
  • HY-101448
    TMI-1
    Inhibitor 99.59%
    TMI-1 (WAY-171318) inhibits TNF converting enzyme (TACE) (IC50 of 8.4 nM), ADAM-TS-4, ADAM-17 and various MMPs with oral activity. TMI-1 significantly suppresses the secretion of TNF-α , alleviating collagen-induced arthritis in mice. TMI-1 inhibits cancer cell proliferation, induces apoptosis through a caspase-dependent pathway. TMI-1 also reverses TRPV1 upregulation and lowers the levels of inflammatory factors (TNF-αIL-1βIL-6) in nerve cells, protecting against paclitaxel-induced neurotoxicity. TMI-1 leads to changes in pro-atherogenic lipoprotein profiles, but does not affect the progression of early lesions.
    TMI-1
  • HY-P99260
    Conatumumab
    Agonist 98.90%
    Conatumumab (AMG 655) is a human monoclonal agonist antibody against human death receptor 5 (DR5, TRAILR2) (Kd: 1 nM for the long form of DR5, 0.8 nM for the short form of DR5). Conatumumab induces apoptosis via caspase activation. Conatumumab can be used in the research of cancers. .
    Conatumumab
  • HY-P99909
    Elranatamab
    Elranatamab (PF-06863135) is an anti-CD3E/TNFRSF17 human IgG2κ monoclonal antibody. Recommend Isotype Controls: Human IgG2 kappa, Isotype Control (HY-P99002).
    Elranatamab
  • HY-P99057
    Varlilumab
    Inhibitor
    Varlilumab (CDX-1127) is a first-in-class human IgG1 anti-CD27 monoclonal antibody. Varlilumab has an anti-tumor activity.
    Varlilumab
  • HY-P99670
    Iscalimab
    Inhibitor 99.64%
    Iscalimab (CFZ-533) is a non-depleting IGg1 monoclonal antibody targeting CD40 (KD: 0.3 nM). Iscalimab can be used for research of Graves' hyperthyroidism and autoimmune diseases.
    Iscalimab
  • HY-N0604
    Ginsenoside Rh1
    Inhibitor ≥98.0%
    Ginsenoside Rh1 (Prosapogenin A2) inhibits the expression of PPAR-γ, TNF-α, IL-6, and IL-1β.
    Ginsenoside Rh1
  • HY-P99653
    Ianalumab
    Inhibitor 99.97%
    Ianalumab (VAY-736) is a human, decarboxylated antibody against BAFF-R. Ianalumab can block the interaction between BAFF and BAFF-R and antagonize the apoptosis protection mediated by BAFF. Ianalumab exerts antibody-dependent cytotoxic (ADCC), depending on effector cell activation mediated by immune receptor tyrosine activation motif (ITAM).
    Ianalumab
  • HY-P99459
    Baminercept
    99.80%
    Baminercept (BG 9924) is a lymphotoxin β receptor IgG fusion protein (LTβR-Ig). Baminercept can be used for the research of many autoimmune diseases including primary Sj gren's syndrome (SS) and rheumatoid arthritis (RA) .
    Baminercept
  • HY-N0512
    Loganin
    Inhibitor 99.82%
    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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