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-N0412
    Sesamoside
    Inhibitor 99.77%
    Sesamoside is an orally active anti-inflammatory, anti-hypoxic and analgesic agent. Sesamoside inhibits the phosphorylation of ERK and JNK, downregulates NLRP3 expression, restricts the nuclear localization of P65, regulates AKR1B1 expression, and reduces the expression of TRPV1 gene in the spinal cord. Sesamoside reduces the production of TNF-α, IL-6, IL-1β, iNOS and NO, restores cellular metabolism and organ function, and alleviates cold and mechanical hyperalgesia. Sesamoside can be used in research related to septic shock, high-altitude pulmonary edema and neuropathic pain.
    Sesamoside
  • HY-12642A
    Diethylcarbamazine
    99.83%
    Diethylcarbamazine is an orally active microfilaricidal agent used originally in onchocerciasis and lymphatic filiariasis. Diethylcarbamazine reduces eosinophil trafficking to the lung tissue and exerts anti-allergic effects. Diethylcarbamazine reduces serum levels of leptin, TNF-α, IL-6, MCP-1, glucose, insulin, and triglycerides, and ameliorates insulin resistance without altering body, liver, or adipose tissue weights. Diethylcarbamazine enhances reactive oxygen intermediate expression by polymorphonuclear neutrophils, increases lymphocyte proliferation, and inhibits actinomycetoma lesion development. Diethylcarbamazine can be used for the researches of bronchial asthma, insulin resistance and infection.
    Diethylcarbamazine
  • HY-N6028
    Darutoside
    Inhibitor 99.89%
    Darutoside is an orally effective diterpene compound with significant anti-inflammatory, analgesic, wound healing promotion, and immunomodulatory activities. Darutoside reduces edema and pain responses by inhibiting the expression of COX-2 and the migration of inflammatory cells. It regulates macrophage polarization towards the M2 type by inhibiting the NF-κB pathway, alleviating inflammation and promoting wound healing. Through multi-target regulation of metabolic networks, Darutoside significantly alleviates acute gouty arthritis.
    Darutoside
  • HY-155751
    HMGB1-IN-1
    Inhibitor 98.40%
    HMGB1-IN-1 (compound 6) displays strong NO inhibitory effect in RAW264.7 cells with IC50 value of 15.9 ± 0.6 μM. HMGB1-IN-1 inhibit the HMGB1/NF-κB/NLRP3 pathway. HMGB1-IN-1 shows good anti-inflammatory activity and good anti-sepsis effects in kidney injury.
    HMGB1-IN-1
  • HY-W015892
    γ-Hexalactone
    Activator 99.77%
    γ-Hexalactone (γ-Caprolactone) is a gamma-lactone found in ripe fruits. γ-Hexalactone induces DNA damage in human lymphocytes and HepG2 cells, modulates cytokine secretion in human lymphocytes, and reduces recombinant PON1 activity. γ-Hexalactone serves as a dose-dependent oviposition inhibitor against Bactrocera oleae. γ-Hexalactone can be used for the research of Bactrocera oleae pest management.
    γ-Hexalactone
  • HY-N7064
    Iminostilbene
    Inhibitor 99.34%
    Iminostilbene is a chemical precursor of carbamazepine. Additionally, Iminostilbene is an orally active inhibitor of PKM2 (Pyruvate Kinase M2) and COX2 (Cyclooxygenase-2). Iminostilbene exerts its effects by inhibiting PKM2 and its interaction with HIF-1α and STAT3, reducing COX2 and iNOS expression, and decreasing LPS-induced release of IL-1β, IL-6, TNF-α, and MCP-1, thereby suppressing macrophage-mediated inflammatory responses and improving myocardial ischemia/reperfusion (MI/R) injury. Iminostilbene holds promise for research in inflammation regulation, cardiovascular diseases (such as MI/R injury), and macrophage-mediated immune-related diseases.
    Iminostilbene
  • HY-172458
    Z-3578
    Inhibitor 98.72%
    Z-3578 is an orally active small-molecule antagonist of MrgX2 with potent antipseudoallergic activity, exhibiting a KD value of 729 nM. Z-3578 effectively inhibits mast cell degranulation induced by substance P (SP) and C48/80, suppresses the release of β-hexosaminidase, significantly reduces the release of histamine and TNF-α, and decreases intracellular calcium flux. In a mouse pseudoallergy model, Z-3578 significantly alleviates paw swelling and dye extravasation, and reduces serum histamine levels. Z-3578 can be used for the study of pseudoallergic reactions.
    Z-3578
  • HY-N2036
    Mosloflavone
    99.92%
    Mosloflavone is a flavonoid isolated from Scutellaria baicalensis Georgi with ?anti-EV71 activity. Mosloflavone? inhibits VP2 virus replication and protein expression during the initial stage of virus infection and inhibits viral VP2 capsid protein synthesis. Mosloflavone is a promising biocide and inhibits P. aeruginosa virulence and biofilm formation.
    Mosloflavone
  • HY-16363
    Omtriptolide
    Inhibitor
    Omtriptolide (PG490-88) is a derivative proagent of triptolide purified from the Chinese herb.
    Omtriptolide
  • HY-P1860A
    TNF-α (31-45), human TFA
    Activator 99.40%
    TNF-α (31-45), human TFA 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 TFA
  • HY-W923189
    Neral
    Inhibitor
    Neral is a plant-derived anti-inflammatory, antioxidant and anticancer agent. Neral inhibits the phosphorylation of ERK1/2, p38 MAPK and IκB in macrophages induced by LPS (HY-D1056), suppresses the secretion of TNF-α and IL-6, as well as the expression of pro-IL-1β, iNOS and COX-2 in cells, and reduces the production of ROS in cells. Neral inhibits the activation of the NLRP3 inflammasome, and decreases the activation of caspase-1 and the secretion of IL-1β in mouse macrophages. Neral induces autophagy, and exhibits antiproliferative activity both in in vitro breast cancer cell models and mouse xenograft models. Neral regulates brassinosteroid, jasmonic acid and ethylene signaling pathways, and induces the expression of AP2/ERF-ERF and bHLH family genes in rice roots. Neral acts as a herbicide safener, alleviates the damage induced by Fenoxaprop-P-ethyl (HY-B2013), and promotes the elongation of rice roots. Neral can be used in research related to breast cancer, inflammatory and immune system diseases, and herbicide safeners.
    Neral
  • HY-P2310A
    Defensin HNP-1 human TFA
    Activator 99.91%
    Defensin HNP-1 human TFA is a type of human neutrophil peptide (HNPs). Defensin HNP-1 human TFA possesses immunomodulatory functions and can delay the apoptosis of neutrophils. Defensin HNP-1 human TFA inhibits DNA/RNA/protein synthesis and interferes with metabolic pathways, thus exhibiting broad antibacterial activity. Defensin HNP-1 human TFA has direct inactivation effects on HIV, HSV-1, HSV-2, CMV, influenza virus, etc. Defensin HNP-1 human TFA has antileishmanial activity. Defensin HNP-1 human TFA is involved in endothelial cell dysfunction during the early development of atherosclerosis.
    Defensin HNP-1 human TFA
  • HY-175479
    GLPG4970
    Inhibitor 99.60%
    GLPG4970 is a potent, selective and orally active salt-inducible kinase 2/3 (SIK2/SIK3) dual inhibitor with IC50 values of 0.3 nM and 0.7 nM. GLPG4970 has weak inhibition of hERG channel with an IC50 of 29 μM. GLPG4970 can decrease TNFα release and increase IL-10 release GLPG4970 can be used for the researches of inflammation and immunology, such as colitis.
    GLPG4970
  • HY-121435
    K-8012
    99.51%
    K-8012 is a Sulindac (HY-B0008) analog and RXRα antagonist with an IC50 of 9.2 µM. K-8012 inhibits the activation of AKT. K-8012 induces Apoptosis, redirecting the TNFα signaling pathway from survival to death. K-8012 exerts anticancer activity against lung cancer, prostate cancer, and breast cancer. K-8012 can be used in research related to lung cancer, prostate cancer, breast cancer, and hepatocellular carcinoma.
    K-8012
  • HY-N0247
    Saikosaponin B1
    Inhibitor 99.42%
    Saikosaponin B1 is a bioactive constituent of Radix Bupleuri. Saikosaponin B1 is an agonist of the 5-HT2C receptor with an EC50 of 147.41 μM. Saikosaponin B1 inhibits the Hedgehog (Hh) signaling pathway by targeting the transmembrane protein SMO. Sailosaponin B1 can reduce liver fibrosis. Saikosaponin B1 has anti-cancer activities thus can be studies in research for cancers such as Medulloblastoma (MB).
    Saikosaponin B1
  • HY-P991490
    ISB2001
    Inhibitor 99.17%
    ISB2001 is a trispecific antibody targeting CD38, CD3 and BCMA. ISB2001 effectively counteracts tumor immune escape mechanisms caused by antigen downregulation, antigen loss, soluble factor competition and other factors. ISB2001 is applicable to relevant research on multiple myeloma and relapsed/refractory multiple myeloma.
    ISB2001
  • HY-113402R
    Gamma-glutamylcysteine (Standard)
    Inhibitor
    Gamma-glutamylcysteine (Standard) is the analytical standard of Gamma-glutamylcysteine. This product is intended for research and analytical applications. Gamma-glutamylcysteine (γ-Glu-Cys) is an orally active, blood-brain barrier permeable dipeptide. Gamma-glutamylcysteine activates AMPK, SIRT1, IL-4/STAT6, AC/cAMP/PI3K, IGF-1R/IRS1/PI3K, and Nrf2 signaling pathways; it inhibits NF-κB, JAK1/STAT1/3, MAPKs, cadmium-induced p38 MAPK, JNK, and PI3K/Akt signaling pathways. Gamma-glutamylcysteine regulates macrophage polarization, modulates the trafficking of CD36 and GLUT4, induces glutathione synthesis, improves metabolic dysfunction, reduces lipid deposition, ameliorates glucose homeostasis, inhibits apoptosis (Apoptosis), stabilizes mitochondria, suppresses lipid peroxidation, iron accumulation and ferroptosis (Ferroptosis), reduces ds-HMGB1 levels, reverses mechanical hyperalgesia, and alleviates hepatic lipid droplet formation. Gamma-glutamylcysteine is applicable to research related to inflammatory bowel disease, type 2 diabetes, cadmium-induced neurotoxicity, Alzheimer's disease, cerebral ischemia/reperfusion injury, neuropathy, and alcoholic liver disease.
    Gamma-glutamylcysteine (Standard)
  • HY-P99015
    Dacetuzumab
    Inhibitor
    Dacetuzumab (SGN-40) is a humanized IgG1, anti-CD40 monoclonal antibody with anti-lymphoma activity. Dacetuzumab kills tumor cells via immune effector functions (antibody-dependent cellular cytotoxicity and phagocytosis [ADCC/ADCP]). Dacetuzumab ((SGN-40) can be used for multiple myeloma research.
    Dacetuzumab
  • HY-118250
    GSK2245035
    Activator 99.79%
    GSK2245035 is a highly potent and selective intranasal Toll-Like receptor 7 (TLR7) agonist with preferential Type-1 interferon (IFN)-stimulating properties. GSK2245035 has pEC50s of 9.3 and 6.5 for IFNα and TFNα. GSK2245035 effectively suppresses allergen-induced Th2 cytokine production in human peripheral blood cell cultures. GSK2245035 is used for asthma.
    GSK2245035
  • HY-N0262R
    Cordycepin (Standard)
    Cordycepin (Standard) is the analytical standard of Cordycepin. This product is intended for research and analytical applications. 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 (Standard)
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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