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-N2420
    Flavokawain A
    		Activator 99.93%
    Flavokawain A is a chalcone compound and an orally active inhibitor of PRMT5 and cytochrome P450. Flavokawain A has anti-inflammatory, anti-tumor, and immunomodulatory effects. Flavokawain A can inhibit the proliferation of tumor cells and induce apoptosis. Flavokawain A can be used in the research of diseases such as bladder cancer.
    Flavokawain A
  • HY-N1431
    Tabersonine
    		Inhibitor 98.14%
    Tabersonine is a selective, orally active NLRP3 inhibitor. Tabersonine directly binds to the NACHT domain of NLRP3, inhibiting its ATPase activity and oligomerization, thereby blocking ASC spot formation and caspase-1 activation, and reducing the release of pro-inflammatory cytokines such as IL-1β. Tabersonine also inhibits K63-linked ubiquitination of TRAF6, blocking NF-κB, PI3K/Akt, and p38 MAPK signaling pathways. Tabersonine can inhibit inflammatory responses, induce apoptosis of liver cancer cells through mitochondrial pathways and death receptor pathways, reduce mitochondrial membrane potential, promote cytochrome c release, and activate caspase proteins. Tabersonine is mainly used in the study of NLRP3-driven inflammatory diseases (such as acute lung injury, sepsis, peritonitis) and tumors such as liver cancer.
    Tabersonine
  • HY-W016412
    Coenzyme Q0
    		Inducer 99.79%
    Coenzyme Q0 (CoQ0) is a potent, oral active ubiquinone compound can be derived from Antrodia cinnamomea. Coenzyme Q0 induces apoptosis and autophagy, suppresses of HER-2/AKT/mTOR signaling to potentiate the apoptosis and autophagy mechanisms. Coenzyme Q0 regulates NFκB/AP-1 activation and enhances Nrf2 stabilization in attenuation of inflammation and redox imbalance. Coenzyme Q0 has anti-angiogenic activity through downregulation of MMP-9/NF-κB and upregulation of HO-1 signaling.
    Coenzyme Q0
  • HY-160099
    20-5,14-HEDE
    		Inhibitor 98.34%
    20-5,14-HEDE (WIT003) is an analog of 20-HETE. 20-5,14-HEDE activates PI3K/Akt signaling pathway, thereby exhibiting anti-apoptotic and cell survival promoting effects. 20-5,14-HEDE is the agonist for 20-HETE that increases intracellular Ca2+ concentrations, thereby enhancing vasoconstriction.
    20-5,14-HEDE
  • HY-P0111
    Z-WEHD-FMK
    		Inhibitor 98.0%
    Z-WEHD-FMK is a potent, cell-permeable and irreversible caspase-1/5 inhibitor. Z-WEHD-FMK also exhibits a robust inhibitory effect on cathepsin B activity (IC50=6 μM). Z-WEHD-FMK can be used to investigate cells for evidence of apoptosis.
    Z-WEHD-FMK
  • HY-139702
    α5β1 integrin agonist-1
    		Activator 99.67%
    α5β1 integrin agonist-1 is an α5β1 integrin agonist, with an EC50 of 1.5 nM. α5β1 integrin agonist-1 inhabits α4β1 integrin (IC50 = 2.99 μM) in Jurkat/VCAM-1 adhesion assayα5β1 integrin agonist-1 induces concentration-dependent apoptosis and activates the caspase 3/7 pathway in α5β1 integrin-expressing K562 cancer cells. α5β1 integrin agonist-1 can be used for the study of cancer.
    α5β1 integrin agonist-1
  • HY-101310
    SYM 2081
    		98.0%
    SYM 2081 is a kainate receptor agonist. SYM 2081 is a substrate of EAAT1 (Km of 54 μM). SYM 2081 inhibits EAAT2-mediated glutamate transport (Kb is 3.4 μM in Xenopus oocytes), modulates Apoptotic signaling pathways (increases Bcl-2 and decreases Bax/caspase-3 expression). SYM 2081 exhibits neuroprotective activity. SYM 2081 can be used in the study of hypoxic-ischemic brain damage and inflammatory or neuropathic pain.
    SYM 2081
  • HY-103667
    2-HBA
    		Activator 99.46%
    2-HBA is a potent inducer of NAD(P)H:quinone acceptor oxidoreductase 1 (NQO1) which can also activate caspase-3 and caspase-10.
    2-HBA
  • HY-N2132
    Flavokawain B
    		Activator 99.99%
    Flavokawain B (Flavokavain B) is an orally active chalcone. Flavokawain B results in activation of caspase-9, -3 and -8, cleavage of PARP. Flavokawain B down-regulates Bcl-2 with concomitant increase in Bax level. Flavokawain B inhibits NF-κB, PI3K/Akt and MAPK signaling pathway. Flavokawain B exhibits Apoptotic effects. Flavokawain B inhibits MMP-9 and promotes ROS generation. Flavokawain B inhibits multiple tumors and inflammation.
    Flavokawain B
  • HY-N7719
    Oosporein
    		Activator 99.16%
    Oosporein is a microbial metabolite and a red crystalline toxin produced by various fungi. Oosporein can promote the reproduction of fungi in host bodies by inhibiting insect immunity, and possesses multiple activities such as antibacterial, antiviral (HSV), and insecticidal effects. Oosporein can inhibit plant growth. In addition, Oosporein can also induce apoptosis, cell membrane damage, oxidative stress, and mitochondrial damage. Oosporein has certain antitumor activity.
    Oosporein
  • HY-19676
    Pralnacasan
    		Inhibitor 99.83%
    Pralnacasan (VX-740) is a potent, selective, non-peptide and orally active interleukin-1β converting enzyme (ICE, caspase 1) inhibitor with a Ki of 1.4 nM. Pralnacasan inhibits proinflammatory cytokines IL-18, IL-1β , and IFN-γ. Pralnacasan has the potential for osteoarthritis and rheumatoid arthritis treatment.
    Pralnacasan
  • HY-129115
    S1QEL1.1
    		Inhibitor 99.9%
    S1QEL1.1 is a small molecule inhibitor that specifically inhibits the generation of superoxide and hydrogen peroxide at the IQ site during reverse electron transfer in mitochondrial respiratory chain complex I (Complex I), with an IC50 of 0.07 μM. S1QEL1.1 can significantly reduce the activation of cysteine-aspartic protease (caspase) triggered by endoplasmic reticulum stress. S1QEL1.1 helps to decrease excessive proliferation of stem cells by inhibiting the Reactive Oxygen Species signaling pathway initiated by endoplasmic reticulum stress.
    S1QEL1.1
  • HY-129440
    N-(p-Coumaroyl) Serotonin
    		Inhibitor 99.03%
    N-(p-Coumaroyl) Serotonin is a selective inhibitor of PDGFRβ, ERK1/2 and caspase-8 with antioxidant, anti-atherosclerotic and anti-inflammatory properties. N-(p-Coumaroyl) Serotonin inhibits glioblastoma cells (U251MG, T98G) with IC50 of 48-81 μM, while the IC50 for normal fibroblasts is 181-197 μM. N-(p-Coumaroyl) Serotonin inhibits PDGF signaling (reducing receptor phosphorylation), blocks Ca2+ influx, and induces apoptosis (activating caspase-8). N-(p-Coumaroyl) Serotonin can improve atherosclerosis and aortic wall enlargement, and can also be used in the study of glioblastoma.
    N-(p-Coumaroyl) Serotonin
  • HY-N0758
    Barlerin
    		99.82%
    Barlerin (8-O-Acetyl shanzhiside methyl ester) is an iridoid glucoside isolated from the leaves of Lamiophlomis rotata Kudo, a Chinese folk medicinal plant in Xi-zang. Barlerin (8-O-Acetyl shanzhiside methyl ester) could inhibt NF-κB.
    Barlerin
  • HY-B0739A
    Citicoline sodium
    		Inhibitor 99.60%
    Citicoline sodium is an endogenous intermediate in the synthesis of phosphatidylcholine which is a component of cell membranes. Citicoline sodium inhibits reactive oxygen species (ROS) and apoptosis. Citicoline sodium can be used for neurological disease and hearing loss study.
    Citicoline sodium
  • HY-125018
    QM31
    		Inhibitor
    QM31 (SVT016426), a cytoprotective agent, is a selective inhibitor of Apaf-1. QM31 inhibits the formation of the apoptosome (IC50=7.9μM), the caspase activation complex composed by Apaf-1, cytochrome c, dATP and caspase-9. QM31 exerts mitochondrioprotective functions and interferes with the intra-S-phase DNA damage checkpoint.
    QM31
  • HY-N0674B
    Dehydrocorydaline (hydroxyl)
    		Activator 99.52%
    Dehydrocorydaline (13-Methylpalmatine) hydroxyl is an alkaloid that regulates protein expression of Bax, Bcl-2; activates caspase-7, caspase-8, and inactivates PARP. Dehydrocorydaline hydroxyl elevates p38 MAPK activation. Anti-inflammatory and anti-cancer activities. Dehydrocorydaline hydroxyl shows strong anti-malarial effects (IC50=38 nM), and low cytotoxicity (cell viability > 90%) using P. falciparum 3D7 strain.
    Dehydrocorydaline (hydroxyl)
  • HY-122883
    BC-1471
    		Inhibitor 99.69%
    BC-1471 is a STAMBP deubiquitinase inhibitor with an IC50 of 0.33 μM. BC-1471 can inhibit the activity of the NALP7 inflammasome. BC-1471 has anti-inflammatory activity and can be used for the research of inflammatory diseases.
    BC-1471
  • HY-N6866
    Gomisin N
    		Activator 99.94%
    Gomisin N is an orally active lignan compound. Gomisin N can be isolated from Schisandra chinensis. Gomisin N induces Apoptosis in a variety of cells. Gomisin N activates AMPK, Akt, MAPK/ERK, Nrf2, caspase-3 and PARP-1. Gomisin N inhibits GSK3β, nitric oxide (NO), and proinflammatory cytokines (IL-1β, IL-6, TNF-α). Gomisin N has anti-inflammatory, antioxidant, anti-obesity, anti-diabetic, and anti-melanogenesis activities. Gomisin N has anti-tumor activity against cervical cancer and liver cancer. Gomisin N improves Alzheimer's disease.
    Gomisin N
  • HY-100472
    ZYZ-488
    		Inhibitor 99.94%
    ZYZ-488 is a competitive apoptotic protease activating factor-1 (Apaf-1) inhibitor. ZYZ-488 inhibits the activation of binding protein procaspase-9 and procaspase-3.
    ZYZ-488
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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