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-120269
    CAY10512
    Inhibitor
    CAY10512 is a NF-κB inhibitor. CAY10512 can suppress the upregulation of NF-κB-sensitive proinflammatory miRNAs (miRNA-9, miRNA-125b, miRNA-146a, miRNA-155) in cerebrospinal fluid and extracellular fluid. CAY10512 significantly reduces the release of pro-inflammatory cytokines (such as TNF-α, MCP-1, IL-8, IL-6). CAY10512 can be used for researchs on neuroinflammation, islet transplantation and microRNA regulation.
    CAY10512
  • HY-153952
    Immuno modulator-1
    Inhibitor
    Immuno modulator-1 (compound 22) inhibits TNFα and IL-2 secretion in human peripheral blood mononuclear cells (hPBMC), with IC50 values of 4.7 and 26 nM, respectively. Immuno modulator-1 shows hERG potassium channel blocking effect, with Inhibitory percentage of 20% at 3 μM.
    Immuno modulator-1
  • HY-161821
    Antitumor agent-173
    Control
    Antitumor agent-173 (Compound 4b) is a prodrug of Cycloicaritin (HY-N1940). Antitumor agent-173 is a substrate for OATP2B1. Antitumor agent-173 selectively inhibits the growth of tumor Antitumor agent-173 significantly increases the oral bioavailability of Cycloicaritin and exerts good antitumor activity and safety.
    Antitumor agent-173
  • HY-P991070
    ADG-106
    Agonist
    ADG-106 is a fully human agonistic monoclonal IgG4 antibody against CD137 (4-1BB). ADG-106 has the mechanism to activate CD137 via strong FcγRIIB-mediated crosslinking while antagonizing CD137 ligands. The isotype control for ADG-106 can refer to Human IgG4 (S228P) kappa, Isotype Control (HY-P99003).
    ADG-106
  • HY-N0822R
    Shikonin (Standard)
    Inhibitor
    Shikonin (Standard) is the analytical standard of Shikonin. This product is intended for research and analytical applications. 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 (Standard)
  • HY-P991403
    BC011
    Inhibitor
    BC011 is a human monoclonal antibody (mAb) targeting TNFRSF1B. BC011 promotes CD8+T cell proliferation and depletes Treg cells, thereby increasing the proportion of effector T cells in the tumor microenvironment. BC011 can be used in tumor Immunity research.
    BC011
  • HY-172590
    LZ-07
    Inhibitor
    LZ-07 is a IRAK4 PROTAC degrader (DC50 = 1.14 nM). LZ-07 leads to marked suppression of cytokines including IL-6, IL-1β, TNF-α, and IL-10 upon degradation of IRAK4. LZ-07 can be studied in research for autoimmune diseases (Pink: IRAK4 ligand (HY-172591); Blue: CRBN ligand (HY-34590); Black: linker (HY-B0149); CRBN ligand + linker: HY-172593).
    LZ-07
  • HY-128754R
    Monoolein (Standard)
    Inhibitor
    Monoolein is a biocompatible lipid molecule that can be used as a carrier for bone repair. Monoolein exhibits anti-inflammatory activity by inhibiting the immune response induced by LPS (HY-D1056). It exerts its anti-inflammatory effects by reducing the production of immune response factors such as IL-12 p40, IL-6, and TNF-α, and inhibiting the generation of NO. Monoolein can be used in drug delivery and research in the field of inflammatory diseases .
    Monoolein (Standard)
  • HY-N10454
    Sinulatumolin C
    Inhibitor
    Sinulatumolin C (compound 3) is an anti-inflammatory agent. Sinulatumolin C has significant TNF-α inhibitory activity with an IC50 value of 2.6 μM.
    Sinulatumolin C
  • HY-163162
    Anhydro-Ouabain
    Inhibitor
    Anhydro-Ouabain (compound 20) is a cardiotonic steroid which shows anti-inflammatory and neuroprotective activities and thus can be used in neurological research.
    Anhydro-Ouabain
  • HY-115577
    Mitochonic acid 35
    Inhibitor
    Mitochonic acid 35 is an IAA analogue with cytoprotective effects.
    Mitochonic acid 35
  • HY-171592
    RIPK2-IN-7
    Inhibitor
    RIPK2-IN-7 (Compound 10w) is an orally active, selective RIPK2 inhibitor (IC50: 0.6 nM). RIPK2-IN-7 inhibits RIPK2 kinase activity, blocks the nucleotide-binding oligomerization domain (NOD) signaling pathway, and reduces the production of inflammatory factors (such as TNFα). RIPK2-IN-7 can be used in the study of inflammatory bowel disease (IBD).
    RIPK2-IN-7
  • HY-124665
    LMP-420
    Inhibitor
    LMP-420 is a selective tumor necrosis factor-α (TNF-α) inhibitor. LMP-420 reduces the release of pro-inflammatory cytokines (e.g., IL-1β, IL-2), inducing the expression of anti-inflammatory cytokine IL-10 and anti-apoptotic molecules SOCS-1 and Mn-SOD. LMP-420 also downregulates chemokines (e.g., IP-10, MCP-1) to reduce immune cell infiltration. LMP-420 is promising for research of type 1 diabetes mellitus, inflammatory diseases (e.g., colitis), and HIV-Mycobacterium tuberculosis coinfection.
    LMP-420
  • HY-P11214
    Hydrostatin-TL1
    Antagonist
    Hydrostatin-TL1 (H-TL1), a nine-amino-acid peptide, is a TNF-α antagonist. Hydrostatin-TL1 can be isolated from the venom gland of sea snake Hydrophis cyanocinctus. H-TL1 competitively inhibits the interaction between TNF-α/TNFR1 and attenuates the cytotoxicity and inflammation of TNF-α. Hydrostatin-TL1 can be used for TNF-α-associated inflammatory diseases, such as rheumatoid arthritis, osteoporosis and inflammatory bowel disease (IBD) research.
    Hydrostatin-TL1
  • HY-N7699A
    D-Trimannuronic acid
    Activator
    D-Trimannuronic acid, an alginate oligomer is extracted from seaweed. D-Trimannuronic acid can induce TNF‐α secretion by mouse macrophage cell lines. D-Trimannuronic acid can be used for the research of pain and vascular dementia.
    D-Trimannuronic acid
  • HY-N6607R
    Tryptanthrin (Standard)
    Modulator
    Tryptanthrin (Standard) is the analytical standard of Tryptanthrin. This product is intended for research and analytical applications. 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 (Standard)
  • HY-P991680
    Elipunercept
    Elipunercept is a fusion protein that combines human TNFRSF1B extracellular domain fragment (1-235) fused at the C-terminus to a human IgG1 Fc fragment. Elipunercept is an immunomodulator.
    Elipunercept
  • 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-P991464
    IBI37G5
    Inhibitor
    IBI37G5 is a human monoclonal antibody (mAb) targeting TNFRSF18/GITR/CD357. IBI37G5 has anti-tumor activity in MC38 and B16F10 mouse tumor models. IBI37G5 can be used in the study of cancer immunity.
    IBI37G5
  • HY-P99893
    Rozibafusp alfa
    Inhibitor
    Rozibafusp alfa (AMG-570) is a humanized IgG2-κ monoclonal antibody targets ICOSL and BAFF. Prezalumab demonstrates beneficial activities on the arthritis of systemic lupus erythematosus. Prezalumab can be used for the research of sjogren's syndrome cutaneous lupus erythematosus, psoriasis and systemic lupus erythematosus (SLE).
    Rozibafusp alfa
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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