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-107738
    Guggulsterone
    		Activator 99.95%
    Guggulsterone is a plant sterol derived from the gum resin of the tree Commiphora wightii. Guggulsterone inhibits the growth of a wide variety of tumor cells and induces apoptosis through down regulation of antiapoptotic gene products (IAP1, xIAP, Bfl-1/A1, Bcl-2, cFLIP and survivin), modulation of cell cycle proteins (cyclin D1 and c-Myc), activation of caspases and JNK, inhibition of Akt. Guggulsterone, a farnesoid X receptor (FXR) antagonist, decreases CDCA-induced FXR activation with IC50s of 17 and 15 μM for Z- and E-Guggulsterone, respectively.
    Guggulsterone
  • HY-N6979
    Crustecdysone
    		Inhibitor 99.63%
    Crustecdysone (20-Hydroxyecdysone) is a naturally occurring ecdysteroid hormone isolated from Serratula coronata which controls the ecdysis (moulting) and metamorphosis of arthropods, it inhibits caspase activity and induces autophagy via the 20E nuclear receptor complex, EcR-USP. Crustecdysone exhibits regulatory or protective roles in the cardiovascular system. Crustecdysone is an active metabolite of Ecdysone (HY-N0179).
    Crustecdysone
  • HY-N0551
    Wedelolactone
    		Inhibitor 99.91%
    Wedelolactone suppresses LPS-induced caspase-11 expression by directly inhibits the IKK Complex. Wedelolactone also inhibits 5-lipoxygenase (5-Lox) with an IC50 of 2.5 μM. Wedelolactone induces caspase-dependent apoptosis in prostate cancer cells via downregulation of PKCε without inhibiting Akt. Wedelolactone can extract from Eclipta alba, and it can be used for the research of cancer.
    Wedelolactone
  • HY-B1135
    Benzbromarone
    		99.80%
    Benzbromarone is an orally active anti-gout agent. Benzbromarone has anti-infammatory, anti-oxidative stress and nephroprotective effects. Benzbromarone can be used for the research of hyperuricemia and gout.
    Benzbromarone
  • HY-13229
    BOC-D-FMK
    		Inhibitor
    Boc-D-FMK is a cell-permeable, irreversible and broad spectrum caspase inhibitor. Boc-D-FMK inhibits apoptosis stimulated by TNF-α with an IC50 of 39 µM.
    BOC-D-FMK
  • HY-111675
    Ac-FLTD-CMK
    		Inhibitor 99.53%
    Ac-FLTD-CMK, a gasdermin D (GSDMD)-derived inhibitor, is a specific inflammatory caspases inhibitor. Ac-FLTD-CMK is effective against caspases-1 (IC50 of 46.7 nM), caspases-4 (IC50 of 1.49 μM), caspases-5 (IC50 of 329 nM), and caspases-11 , but not the apoptotic caspases such as caspase-3.
    Ac-FLTD-CMK
  • HY-N0605
    Ginsenoside Rh2
    		Activator 98.11%
    Ginsenoside Rh2 induces the activation of caspase-8 and caspase-9. Ginsenoside Rh2 induces cancer cell apoptosis in a multi-path manner.
    Ginsenoside Rh2
  • HY-N2302
    Fucoxanthin
    		99.47%
    Fucoxanthin (all-trans-Fucoxanthin) is a marine carotenoid and shows anti-obesity, anti-diabetic, anti-oxidant, anti-inflammatory and anticancer activities.
    Fucoxanthin
  • HY-112226
    VRT-043198
    		Inhibitor 98.05%
    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.
    VRT-043198
  • HY-B1193
    Terfenadine
    		Activator 99.91%
    Terfenadine ((±)-Terfenadine) is a potent open-channel blocker of hERG with an IC50 of 204 nM. Terfenadine, an H1 histamine receptor antagonist, acts as a potent apoptosis inducer in melanoma cells through modulation of Ca2+ homeostasis. Terfenadine induces ROS-dependent apoptosis, simultaneously activates Caspase-4, -2, -9.
    Terfenadine
  • HY-N0674
    Dehydrocorydaline
    		Activator 99.77%
    Dehydrocorydaline (13-Methylpalmatine) is an alkaloid that regulates protein expression of Bax, Bcl-2; activates caspase-7, caspase-8, and inactivates PARP. Dehydrocorydaline elevates p38 MAPK activation. Anti-inflammatory and anti-cancer activities. Dehydrocorydaline shows strong anti-malarial effects (IC50=38 nM), and low cytotoxicity (cell viability > 90%) using P. falciparum 3D7 strain.
    Dehydrocorydaline
  • HY-B1357
    Digitoxin
    		99.36%
    Digitoxin is an anti-cancer agent. Digitoxin induces apoptosis, inhibits influenza cytokine storm, causes DNA double-stranded breaks (DSBs) and blocks the cell cycle at the G2/M phase. Digitoxin induces calcium uptake into cells by forming transmembrane calcium channels and can be used for research of heart failure .
    Digitoxin
  • HY-P1009
    Z-YVAD-FMK
    		Inhibitor ≥98.0%
    Z-YVAD-FMK is a cell-permeable caspase-1 and -4 inhibitor with anti-inflammatory and anti-tumor activities.
    Z-YVAD-FMK
  • HY-13523
    PAC-1
    		Activator 99.93%
    PAC-1 is a procaspase-3 activator that induces apoptosis in cancer cells with an EC50 of 2.08 μM.
    PAC-1
  • HY-N0281
    Daphnetin
    		Inducer 99.86%
    Daphnetin (7,8-dihydroxycoumarin), one coumarin derivative can be found in plants of the Genus Daphne, is a potent, oral active protein kinase inhibitor, with IC50s of 7.67 μM, 9.33 μM and 25.01 μM for EGFR, PKA and PKC in vitro, respectively. Daphnetin triggers ROS-induced cell apoptosis and induces cytoprotective autophagy by modulating the AMPK/Akt/mTOR pathway. Daphnetin has anti-inflammation activitity and inhibits TNF-α, IL-1ß, ROS, and MDA production. Daphnetin has schizontocidal activity against malaria parasites. Daphnetin can be used for rheumatoid arthritis , cancer and anti-malarian research.
    Daphnetin
  • HY-18705
    Azoramide
    		Inhibitor 99.72%
    Azoramide is a potent, orally active small-molecule modulator of the unfolded protein response (UPR). Azoramide improves ER protein folding and elevates ER chaperone capacity, which together protects cells against ER stress. Azoramide alleviates PLA2G6 mutant-induced ER stress through modulating unfolded protein response, and enhances the CERB signaling to rescue mitochondrial function, thereby preventing apoptosis of DA neurons. Azoramide has antidiabetic activity.
    Azoramide
  • HY-P1333
    Dynorphin A
    		Activator 98.59%
    Dynorphin A is an endogenous opioid peptide involved in inhibitory neurotransmission in the central nervous system (CNS). Dynorphin A is a highy potent kappa opioid receptor (KOR) agonist, and is also an agonist for other opioid receptors, such as mu (MOR) and delta (DOR). Dynorphin A can induce neuronal death, and can be used in the research of neurological disease.
    Dynorphin A
  • HY-N0361
    Dihydrocapsaicin
    		Inhibitor 99.86%
    Dihydrocapsaicin, a capsaicin, is a potent and selective TRPV1 (transient receptor potential vanilloid channel 1) agonist. Dihydrocapsaicin reduces AIF, Bax, and Caspase-3 expressions, and increased Bcl-2, Bcl-xL and p-Akt levels. Dihydrocapsaicin enhances the hypothermia-induced neuroprotection following ischemic stroke via PI3K/Akt regulation in rat.
    Dihydrocapsaicin
  • HY-15586
    L67
    		Activator ≥98.0%
    L67 (DNA Ligase Inhibitor) is a competitive DNA ligase inhibitor that effectively inhibits DNA ligases I/III (both IC50 are 10 μM). L67 (DNA Ligase Inhibitor) can cause nuclear DNA damage by reducing levels of mitochondrial DNA and increasing levels of mitochondrially-generated ROS. L67 (DNA Ligase Inhibitor) also activates the Caspase 1-dependent apoptosis pathway in cancer cells, can be used in cancer research.
    L67
  • HY-119272
    EF24
    		Activator 99.78%
    EF24 is a curcumin analogue with greater anti-tumor efficacy and oral bioavailability via deactivation of the MAPK/ERK signaling pathway in oral squamous cell carcinoma (OSCC). EF24 treatment increases the levels of activated caspase 3 and 9, and decreases the phosphorylated forms of MEK1 and ERK.
    EF24
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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