2. Signaling Pathways
  3. Apoptosis
  4. Caspase

Caspase

Caspase

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Caspase is a family of cysteine proteases that play essential roles in apoptosis (programmed cell death), necrosis, and inflammation. There are two types of apoptotic caspases: initiator (apical) caspases and effector (executioner) caspases. Initiator caspases (e.g., CASP2, CASP8, CASP9, and CASP10) cleave inactive pro-forms of effector caspases, thereby activating them. Effector caspases (e.g., CASP3, CASP6, CASP7) in turn cleave other protein substrates within the cell, to trigger the apoptotic process. The initiation of this cascade reaction is regulated by caspase inhibitors. CASP4 and CASP5, which are overexpressed in some cases of vitiligo and associated autoimmune diseases caused by NALP1 variants, are not currently classified as initiator or effector in MeSH, because they are inflammatory enzymes that, in concert with CASP1, are involved in T-cell maturation.

Caspase Isoform Specific Products:

Caspase Isoform Comparison
Cat. No. Product Name Effect Purity Chemical Structure
  • HY-176785S
    MCB-294
    		Agonist
    MCB-294 is a dual-state pan-KRAS inhibitor that selectively inhibits KRAS over NRAS and HRAS. MCB-294 capable of binding both the active (GTP-bound) and inactive (GDP-bound) forms of KRAS with Kds of approximately 1 pM and 10 nM, respectively. MCB-294 broadly impairs the growth of hTERT-HPNE cells expressing G12D, G12C, G12V, G12S, G13D, and wild-type KRAS, with IC50s of approximately 700 nM. MCB-294 induces irreversible apoptosis in KRAS-mutated tumors. MCB-294 effectively suppress KRASG12C inhibitor-resistant cancer cells and remodel the tumor immune microenvironment. MCB-294 can be used for the study of pancreatic cancer, colorectal cancer and lung cancer.
    MCB-294
  • HY-N6818R
    5,?7,?4'-?Trimethoxyflavone (Standard)
    		Activator
    5,?7,?4'-Trimethoxyflavone (Standard) is the analytical standard of 5,?7,?4'-Trimethoxyflavone. This product is intended for research and analytical applications. 5,7,4’-Trimethoxyflavone can be isolated from the medicinal plant Kaempferia parviflora (KP). 5,7,4’-Trimethoxyflavone is a CFTR activator and EC50 is 64 μM. 5,7,4’-Trimethoxyflavone induces apoptosis, increases proteolytic activation of caspase-3, and degradation of ADP-ribose polymerase (PARP) protein. 5,7,4’-Trimethoxyflavone has antitumor activity. 5,7,4’-Trimethoxyflavone can be used to prevent skin aging and oxidative stress.
    5,?7,?4'-?Trimethoxyflavone (Standard)
  • HY-13559
    Atiprimod
    		Activator
    Atiprimod (Azaspirane) is a STAT3 inhibitor with antitumor, anti-inflammatory, and anti-angiogenic activities. Atiprimod blocks the signaling pathways of IL-6 and VEGF by inhibiting the phosphorylation of signal transducer and activator of STAT3. Atiprimod blocks the JAK-STAT signaling pathway by inhibiting the phosphorylation of JAK2 and JAK3. Atiprimod also inhibits cell proliferation, induces cell cycle arrest, and induces autophagy and apoptosis. Atiprimod triggers persistent ER stress-mediated apoptosis in breast cancer cells by activating the PERK/eIF2α/ATF4/CHOP axis and inhibiting the nuclear translocation of STAT3/NF-κB. Atiprimod shows great anti-tumor activities in tumor xenograft mouse models. Atiprimod can be used for the study of pituitary adenoma, breast cancer, multiple myeloma and acute myeloid leukemia (AML).
    Atiprimod
  • HY-170944
    BAG3/HSP70-IN-1
    		Inducer
    BAG3/HSP70-IN-1 (compound 16) is the first-in-class BAG3 and HSP70 dual inhibitor. BAG3/HSP70-IN-1 binds to BAG3 full-length, BAG3-BD, and HSP70 proteins with Kds of 33.10 μM, 27.90 μM, and 33.80 μM, respectively. BAG3/HSP70-IN-1 inhibits HeLa cells with an IC50 of 49.46 μM. BAG3/HSP70-IN-1 induces apoptosis by activating caspase 3 and caspase 9 levels in HeLa cells. BAG3/HSP70-IN-1 elevates p21 levels while reduces FOXM1 expression in HeLa cells. BAG3/HSP70-IN-1 decreases ATPase activity.
    BAG3/HSP70-IN-1
  • HY-125466
    cRIPGBM
    		Activator
    cRIPGBM, a proapoptotic derivative of RIPGBM, a cell type-selective inducer of apoptosis in GBM cancer stem cells (CSCs) by binding to receptor-interacting protein kinase 2 (RIPK2), with an EC50 of 68 nM in GBM-1 cells.
    cRIPGBM
  • HY-112226R
    VRT-043198 (Standard)
    		Inhibitor
    VRT-043198 (Standard) is the analytical standard of VRT-043198. This product is intended for research and analytical applications. VRT-043198, the agent metabolite of VX-765 (Belnacasan), is a potent, selective and blood-brain barrier permeable inhibitor of interleukin-converting enzyme/caspase-1 subfamily caspases. VRT-043198 exhibits Ki values of 0.8 nM and 0.6 nM for ICE/caspase-1 and caspase-4, respectively[1].
    VRT-043198 (Standard)
  • HY-158820A
    Cosdosiran sodium
    		98.48%
    Cosdosiran sodium is a chemically modified siRNA designed to temporarily inhibit expression of the caspase 2 protein and can be used for the study of nonarteritic anterior ischemic optic neuropathy and other optic neuropathies such as glaucoma that result in the death of retinal ganglion cells.?
    Cosdosiran sodium
  • HY-14654A
    Aspirin lithium
    		Activator
    Aspirin (Acetylsalicylic Acid) lithium is an orally active, potent and irreversible inhibitor of cyclooxygenase COX-1 and COX-2, with IC50 values of 5 and 210 μg/mL, respectively. Aspirin lithium induces apoptosis. Aspirin lithium inhibits the activation of NF-κB. Aspirin lithium also inhibits platelet prostaglandin synthetase, and can prevent coronary artery and cerebrovascular thrombosis.
    Aspirin lithium
  • HY-19696S
    Tauroursodeoxycholate-d5
    		Inhibitor
    Tauroursodeoxycholate-d5 is the deuterium labeled Tauroursodeoxycholate. Tauroursodeoxycholate (Tauroursodeoxycholic acid) is an endoplasmic reticulum (ER) stress inhibitor. Tauroursodeoxycholate significantly reduces expression of apoptosis molecules, such as caspase-3 and caspase-12. Tauroursodeoxycholate also inhibits ERK.
    Tauroursodeoxycholate-d<sub>5</sub>
  • HY-174232
    EGFR/CA-IX-IN-1
    		Activator
    EGFR/CA-IX-IN-1 (Compound 14) is a dual inhibitor against epidermal growth factor receptor (EGFR) and carbonic anhydrase IX (CA-IX) with IC50 values of 5.92 nM and 63 nM, respectively. EGFR/CA-IX-IN-1 shows strong cytotoxicity against breast cancer cells (MDA-MB-231, MCF-7) with IC50 values of 5.78 μM and 8.05 μM, respectively. EGFR/CA-IX-IN-1 inhibits the catalytic activity of CA-IX, up-regulates BAX/Bcl-2, activates caspases, and arrests the cell cycle at the G1 phase. EGFR/CA-IX-IN-1 is promising for research of breast cancer.
    EGFR/CA-IX-IN-1
  • HY-P10244
    Ac-YVAD-FMK
    		Inhibitor
    Ac-YVAD-FMK is an inhibitor for caspase 1-like protease.
    Ac-YVAD-FMK
  • HY-P3483
    Maxadilan
    		Inhibitor
    Maxadilan is a specific irreversible PAC1 receptor agonist and a potent vasodilator peptide present in the salivary glands of sand flies. Maxadilan exhibits anti-apoptotic activity in hADSCs. Maxadilan inhibits pro-inflammatory cytokines (TNF-α) and enhances anti-inflammatory mediators (IL-10). Maxadilan can activate leukocytes and inhibit vascular permeability through PAC1 receptors. Maxadilan promotes neural differentiation of human adipose-derived stem cells. Maxadilan can be used to study endotoxin shock, atherosclerosis, and neurodegenerative diseases[1][2][3][4][5].
    Maxadilan
  • HY-174254
    AKT-IN-28
    AKT-IN-28 is an Akt allosteric inhibitor, a derivative of Shikonin (HY-N0822). AKT-IN-28 effectively binds to the allosteric site of Akt through hydrophobic and hydrogen interactions with Kd of 2.07 μM. AKT-IN-28 significantly inhibits Akt activity, induces cell apoptosis, arrests cell cycle in G2/M phase, and suppresses proliferation, migration and metabolism of KRAS mutant colorectal cancer cells.
    AKT-IN-28
  • HY-N8617
    Trijuganone C
    		Inhibitor
    Trijuganone C, a natural product extracted from Salvia miltiorrhiza, inhibits the proliferation of cancer cells through induction of apoptosis mediated by mitochondrial dysfunction and caspase activation.
    Trijuganone C
  • HY-P10147
    Ac-LDESD-AMC
    		Inhibitor
    Ac-LDESD-AMC is a caspase-2 inhibitor. Ac-LDESD-AMC has a peptide sequence of Leu-Asp-Glu-Ser-Asp.
    Ac-LDESD-AMC
  • HY-N2334R
    Glycochenodeoxycholic acid (Standard)
    		Inhibitor
    Glycochenodeoxycholic acid (Standard) is the analytical standard of Glycochenodeoxycholic acid. This product is intended for research and analytical applications. Glycochenodeoxycholic acid (Chenodeoxycholylglycine) is a relatively toxic bile salt generated in the liver from chenodeoxycholic acid and glycine. Glycochenodeoxycholic acid inhibits Autophagosome formation and impairs lysosomal function by inhibiting lysosomal proteolysis and increasing lysosomal pH in human normal liver cells, leading to the Apoptosis of human hepatocyte cells. Glycochenodeoxycholic acid induces stemness and chemoresistance via activating STAT3 signaling pathway in hepatocellular carcinoma cells (HCC). Glycochenodeoxycholic acid is promising for research in the field of cholestasis desease, hepatocellular carcinoma and primary sclerosing cholangitis (PSC)[1][2][3][4].
    Glycochenodeoxycholic acid (Standard)
  • HY-N15657
    Geiparvarin
    		Activator
    Geiparvarin is an anticancer agent and an inhibitor of MAO-B (pIC50 = 6.84 μM). Geiparvarin exerts anti-tumor effects by downregulating COX2 expression and inhibiting angiogenesis. Geiparvarin blocks the cell cycle at the G1 phase and induces apoptosis of cancer cells. Geiparvarin has anti-microtubule activity and destroys the cytoskeleton to exert anti-proliferative effects. Geiparvarin has research significance for lung cancer, leukemia, and breast cancer.
    Geiparvarin
  • HY-174403
    c-MYC/BCL2 ligand 1 iodide
    		Activator
    c-MYC/BCL2 ligand 1 iodide is a dual-targeting c-MYC/Bcl-2 G4 ligand with Kd values of 0.90 μM (c-MYC G4) and 0.56 μM (Bcl-2 G4). c-MYC/BCL2 ligand 1 iodide inhibits c-MYC and Bcl-2 gene transcription by binding to G4-forming sequences and downregulates their protein expression. c-MYC/BCL2 ligand 1 iodide inhibits suppresses migration, induces caspase-dependent apoptosis, and triggers cell cycle G1 arrest in MCF-7 cells. c-MYC/BCL2 ligand 1 iodide significantly suppresses tumor growth in a 4T1 syngeneic model with no observable toxicity. c-MYC/BCL2 ligand 1 iodide can be used for the research of breast cancer.
    c-MYC/BCL2 ligand 1 iodide
  • HY-W011978S
    N-Acetyl-L-tryptophan-d3
    N-Acetyl-L-tryptophan-d3 is the deuterium labeled N-Acetyl-L-tryptophan (HY-W011978). N-Acetyl-L-tryptophan is an antagonist of the neurokinin-1 receptor (NK-1R), disrupting the binding of substance P (SP) to NK-1R. This action provides neuroprotective effects, improving memory deficits and motor impairments. N-Acetyl-L-tryptophan is also an inhibitor of cytochrome c (Cytochrome c), and it exerts antioxidant and anti-inflammatory effects by inhibiting the expression of IL-1β and the activation of caspase-1. N-Acetyl-L-tryptophan holds promise for research in neurodegenerative and inflammatory diseases.
    N-Acetyl-L-tryptophan-d<sub>3</sub>
  • HY-P10082
    Ac-VETD-AMC
    Ac-VETD-AMC is a synthetic peptide substrate for caspase 8. Ac-VETD-AMC also has potential to assess functional activity of recombinant phytaspase.
    Ac-VETD-AMC
Cat. No. Product Name / Synonyms Species Source
Cat. No. Product Name / Synonyms Application Reactivity
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Download Caspase Signaling Pathway Map.

Upon binding to their cognate ligand, death receptors such as Fas and TRAILR can activate initiator Caspases (Pro-caspase 8 and Pro-caspase 10) through dimerization mediated by adaptor proteins such as FADD and TRADD. Active Caspase 8 and Caspase 10 then cleave and activate the effector Caspase 3, 6 and 7, leading to apoptosis. ROS/DNA damage and ER stress trigger Caspase 2 activation. Active Caspase 2 cleaves and activates Caspase 3 and initiates apoptosis directly. Caspase 2, 8 and 10 can also cleave Bid, stimulate mitochondrial outer membrane permeabilization (MOMP) and initiate the intrinsic apoptotic pathway. Following MOMP, mitochondrial intermembrane space proteins such as Smac and Cytochrome C are released into the cytosol. Cytochrome C interacts with Apaf-1, triggering apoptosome assembly, which activates Caspase 9. Active Caspase 9, in turn, activates Caspase 3, 6 and 7, leading to apoptosis. Mitochondrial release of Smac facilitates apoptosis by blocking the inhibitor of apoptosis (IAP) proteins. 

 

Following the binding of TNF to TNFR1, TNFR1 binds to TRADD, which recruits RIPK1, TRAF2/5 and cIAP1/2 to form TNFR1 signaling complex I. Formation of the complex IIa and complex IIb is initiated either by RIPK1 deubiquitylation mediated by CYLD or by RIPK1 non-ubiquitylation due to depletion of cIAPs. The Pro-caspase 8 homodimer in complex IIa and complex IIb generates active Caspase 8. This active Caspase 8 in the cytosol then carries out cleavage reactions to activate downstream executioner caspases and thus induce classical apoptosis[1][2]. 

 

Reference:

[1]. Thomas C, et al. Caspases in retinal ganglion cell death and axon regeneration. Cell Death Discovery volume 3, Article number: 17032 (2017).
[2]. Brenner D, et al. Regulation of tumour necrosis factor signalling: live or let die. Nat Rev Immunol. 2015 Jun;15(6):362-74.

Caspase Isoform Comparison

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