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-147141
    HS-276
    Inhibitor 98.93%
    HS-276 is an orally active, potent and highly selective TAK1 inhibitor, with a Ki of 2.5 nM. HS-276 shows significant inhibition of TAK1, CLK2, GCK, ULK2, MAP4K5, IRAK1, NUAK, CSNK1G2, CAMKKβ-1, and MLK1, with IC50 values of 8.25, 29, 33, 63, 125, 264, 270, 810, 1280, and 5585 nM, respectively. HS-276 can be used for rheumatoid arthritis (RA) research.
    HS-276
  • HY-B0679
    Lubiprostone
    Antagonist ≥98.0%
    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-156454
    UCB-6876
    Inhibitor 98.49%
    UCB-6876 is a TNFα inhibitor. UCB-6876 can specifically bind to the asymmetric crystalline form of the TNF-α trimer, with a KD of 22 μM.
    UCB-6876
  • 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-134240
    L-Threonic acid magnesium
    Antagonist ≥99.0%
    L-Threonic acid magnesium (Magnesium L-threonate) is the enantiomer of Threonic acid and the metabolite of vitamin C (HY-B0166). 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 is orally active.
    L-Threonic acid magnesium
  • 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-P99796
    Ozoralizumab
    Inhibitor 99.80%
    Ozoralizumab (ATN-103) is an anti-TNFα humanized antibody. Ozoralizumab is a humanized trivalent nanobody compound that consists of two anti-human TNFα nanobodies and an anti-human serum albumin (HSA) nanobody. Ozoralizumab can be used in research of arthritis.
    Ozoralizumab
  • HY-N0635
    Prim-O-glucosylcimifugin
    99.94%
    Prim-O-glucosylcimifugin exerts anti-inflammatory effects through the inhibition of iNOS and COX-2 expression by through regulating JAK2/STAT3 signaling.
    Prim-O-glucosylcimifugin
  • HY-133807
    Benpyrine
    Inhibitor 99.26%
    Benpyrine is a highly specific and orally active TNF-α inhibitor with a KD value of 82.1 μM. Benpyrine tightly binds to TNF-α and blocks its interaction with TNFR1, with an IC50 value of 0.109 µM. Benpyrine has the potential for TNF-α mediated inflammatory and autoimmune disease research.
    Benpyrine
  • HY-110247
    TRAF-STOP inhibitor 6877002
    Inhibitor 99.67%
    TRAF-STOP inhibitor 6877002 is a selective CD40-TRAF6 interaction inhibitor. TRAF-STOP inhibitor 6877002 exerts anti-atherosclerotic activity by blocking the CD40-TRAF6 signaling pathway, inhibiting classical monocyte activation, leukocyte recruitment, and macrophage activation and migration. TRAF-STOP inhibitor 6877002 reduces the phosphorylation levels of signaling intermediates in the canonical NF-κB pathway.
    TRAF-STOP inhibitor 6877002
  • HY-W010201
    Citronellol
    Modulator 98.08%
    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-N0042
    Ginsenoside Rc
    Inhibitor ≥98.0%
    Ginsenoside Rc, one of major Ginsenosides from Panax ginseng, enhances GABA receptorA (GABAA)-mediated ion channel currents (IGABA). Ginsenoside Rc inhibits the expression of TNF-α and IL-1β.
    Ginsenoside Rc
  • HY-147045
    UCB-5307
    Inhibitor
    UCB-5307 is a potent TNF signaling inhibitor with a KD of 9 nM for human TNFα. UCB-5307 can penetrate the preformed hTNF/hTNFR1 complex.
    UCB-5307
  • 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-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-N2963
    Broussonin E
    Inhibitor 98.18%
    Broussonin E is a phenolic compound and shows anti-inflammatory activity. Broussonin E can suppress inflammation by modulating macrophages activation statevia inhibiting the ERK and p38 MAPK and enhancing JAK2-STAT3 signaling pathway. Broussonin E can be used for the research of inflammation-related diseases such as atherosclerosis.
    Broussonin E
  • HY-P99046
    Selicrelumab
    Agonist
    Selicrelumab is an agonist CD40 antibody, induces changes in the tumor microenvironment. Selicrelumab can be used for the research of pancreatic cance and neoadjuvant study.
    Selicrelumab
  • 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-N0619
    Mulberroside A
    Inhibitor 99.86%
    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-B0766
    Bicyclol
    Inhibitor 99.91%
    Bicyclol (SY801) is an orally active derivative of the traditional Chinese medicine Schisandra chinensis, which has antiviral, anti-inflammatory, immunomodulatory, antioxidant, anti-steatosis, anti-fibrotic and anti-tumor activities. Bicyclol regulates the expression of heat shock proteins and plays an anti-apoptosis role in hepatocytes. Bicyclol reduces the activation of NF-κB and the levels of inflammatory factors in hepatocytes infected with hepatitis C virus (HCV) by inhibiting the activation of the ROS-MAPK-NF-κB pathway, and prevents ferroptosis in acute liver injury. Bicyclol can change the expression of Mdr-1, GSH/GST and Bcl-2, increase the intracellular concentration of anticancer drugs, and sensitize drug-resistant cells to anticancer drugs. Bicyclol inhibits the proliferation of human malignant hepatoma cells by regulating the PI3K/AKT pathway and the Ras/Raf/MEK/ERK pathway. Bicyclol can be used in the study of chronic hepatitis, acute liver injury, nonalcoholic fatty liver disease, liver fibrosis and hepatocellular carcinoma.
    Bicyclol
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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