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-N1931
    Epifriedelanol
    		Inducer 99.69%
    Epifriedelanol is a triterpenoid found in the root bark of Ulmus davidiana. Epifriedelanol induces apoptosis in DU145 cells. Epifriedelanol has antitumor and anti-inflammatory activities. Epifriedelanol inhibits cellular senescence in human primary cells.
    Epifriedelanol
  • HY-P2616A
    Mca-YVADAP-Lys(Dnp)-OH TFA
    		Chemical 99.45%
    Mca-YVADAP-Lys(Dnp)-OH TFA is a fluorogenic substrate for caspase-1 and angiotensin-converting enzyme 2 (ACE2).
    Mca-YVADAP-Lys(Dnp)-OH TFA
  • HY-14521A
    Lometrexol disodium
    		Inducer 98.0%
    Lometrexol (DDATHF) disodium, an antipurine antifolate, can inhibit the activity of glycinamide ribonucleotide formyltransferase (GARFT) but do not induce detectable levels of DNA strand breaks. Lometrexol disodium can further inhibit de novo purine synthesis, causing abnormal cell proliferation and apoptosis, even cell cycle arrest. Lometrexol disodium has anticancer activity. Lometrexol disodium also is a potent human Serine hydroxymethyltransferase1/2 (hSHMT1/2) inhibitor.
    Lometrexol disodium
  • HY-N7045
    Isosilybin B
    		Activator 99.32%
    Isosilybin B is a flavonolignan. Isosilybin B can be isolated from Silybum marianum. Isosilybin B can regulate cell cycle-related proteins (e.g., reduce cyclins (D3, D1, A, E), Cdk4, Cdk2, Cdc25A), and activate Caspases (Caspase-9 and Caspase-3). Isosilybin B can promote Apoptosis, reduce androgen receptor (AR) and PSA. Isosilybin B has anticancer activity against prostate cancer.
    Isosilybin B
  • HY-P4449A
    Ac-VRPR-AMC TFA
    		99.35%
    Ac-VRPR-AMC TFA is a fluorogenic metacaspase substrate. Ac-VRPR-AMC TFA can be used to assay metacaspase activity.
    Ac-VRPR-AMC TFA
  • HY-W177546
    CD00509
    		Agonist 98.0%
    CD00509 is a tyrosyl-DNA phosphodiesterase (PDE) Tdp1 inhibitor with an IC50 of 0.71 μM. CD00509 increases DNA damage and promotes apoptosis of MCF-7 cells. CD00509 can sensitize breast cancer cells and wild-type murine embryonic fibroblasts (MEFs) to Camptothecin (CPT) (HY-16560). CD00509 can be used for the study of cancers such as breast cancer.
    CD00509
  • HY-131113
    N-Nitrosodibutylamine
    		99.96%
    N-Nitrosodibutylamine (N-Nitroso-di-n-butylamine) is a nitrosamine enriched in the drinking water. N-Nitrosodibutylamine regulates caspase pathway. N-Nitrosodibutylamine induces Apoptosis. N-Nitrosodibutylamine induces hepatocarcinoma and oxidative DNA damage.
    N-Nitrosodibutylamine
  • HY-19696AS
    Tauroursodeoxycholate-d4 sodium
    		Inhibitor 99.50%
    Tauroursodeoxycholate-d4 (sodium) is the deuterium labeled Tauroursodeoxycholate sodium. Tauroursodeoxycholate (Tauroursodeoxycholic acid; TUDCA) sodium 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>4</sub> sodium
  • HY-141622
    SDZ 224-015
    		Inhibitor
    SDZ 224-015 is an orally active inhibitor of the interleukin-1 beta (IL-1β) converting enzyme and caspase-1. SDZ 224-015 possesses anti-COVID-19 activity, targeting Mpro (IC50 of 30 nM).
    SDZ 224-015
  • HY-N2842
    α-Amyrin acetate
    		Inducer 99.07%
    α-Amyrin acetate is a pentacyclic triterpenoid compound with oral activity. α-Amyrin acetate can inhibit cancer cells proliferation and induce apoptosis. α-Amyrin acetate can reduce blood glucose level. α-Amyrin acetate can be used for the researches of cancer and metabolic disease, such as breast cancer and diabetes.
    α-Amyrin acetate
  • HY-131688
    2-Chlorohexadecanoic acid
    		Inhibitor 99.88%
    2-Chlorohexadecanoic acid, an inflammatory lipid mediator, interferes with protein palmitoylation,induces ER-stress markers, reduced the ER ATP content, and activates transcription and secretion of IL-6 as well as IL-8.2-Chlorohexadecanoic acid disrupts the mitochondrial membrane potential and induces procaspase-3 and PARP cleavage.2-Chlorohexadecanoic acid can across blood-brain barrier (BBB) and compromises ER- and mitochondrial functions in the human brain endothelial cell line hCMEC/D3.
    2-Chlorohexadecanoic acid
  • HY-N2736
    3′,4′,7-Trihydroxyflavone
    		Inhibitor 98.0%
    3′,4′,7-Trihydroxyflavone is an orally active inhibitor of OXA-48 (IC50 = 1.89 μM) and COX-1 (IC50 = 36.37 μM). 3′,4′,7-Trihydroxyflavone exhibits antioxidant and anti-inflammatory properties, inhibiting the release of inflammatory cytokines such as IL-6, IL-8, and TNF-α. 3′,4′,7-Trihydroxyflavone inhibits H2O2-induced neuronal apoptosis and ROS accumulation, and exerts anti-neuroinflammatory effects by suppressing the JNK-STAT1 pathway. 3′,4′,7-Trihydroxyflavone exhibits antimicrobial and antibiotic-modifying activities against multidrug-resistant Gram-negative enteric bacteria. 3′,4′,7-Trihydroxyflavone inhibits RANKL-induced osteoclast formation via NFATc1. 3′,4′,7-Trihydroxyflavone activates the CREB-BDNF axis and restores scopolamine (HY-N0296)-induced memory deficits in mice.
    3′,4′,7-Trihydroxyflavone
  • HY-N1408
    trans-Trimethoxyresveratrol
    		Agonist 99.35%
    Trans-Trimethoxyresveratrol (trans-trismethoxy Resveratrol; (E)-Resveratrol trimethyl ether; trans-3,5,4'-Trimethoxystilbene) is an orally active natural derivative of Resveratrol (HY-16561). Trans-Trimethoxyresveratrol has an enhanced anticancer profile compared to Resveratrol, exhibiting higher potency than resveratrol, with improved cancer cell proliferation inhibition, induction of cell cycle arrest, decreased metastasis, and increased apoptosis. Trans-Trimethoxyresveratrol causes microtubule disassembling and tubulin depolymerization and exerts anti-angiogenic effects through VEGFR2. Trans-Trimethoxyresveratrol can be used for the studies of anti-angiogenic and anti-cancer (such as non-small cell lung cancer and osteosarcoma).
    trans-Trimethoxyresveratrol
  • HY-101287
    MPT0B392
    		Activator 99.63%
    MPT0B392, an orally active quinoline derivative, induces c-Jun N-terminal kinase (JNK) activation, leading to apoptosis. MPT0B392 inhibits tubulin polymerization and triggers induction of the mitotic arrest, followed by mitochondrial membrane potential loss and caspases cleavage by activation of JNK and ultimately leads to apoptosis. MPT0B392 is demonstrated to be a novel microtubule-depolymerizing agent and enhances the cytotoxicity of sirolimus in sirolimus-resistant acute leukemic cells and the multidrug resistant cell line.
    MPT0B392
  • HY-16967
    MM41
    		Activator 98.89%
    MM41 is a quadruplex-interacting compound. MM41 binds tightly to quadruplexes encoded in the promoter sequences of the BCL-2 and k-RAS genes. MM41 reduces BCL-2 and k-RAS protein levels, increases caspase 3. MM41 has antitumor effects against pancreatic cancer.
    MM41
  • HY-N8210
    Homoeriodictyol
    		99.83%
    Homoeriodictyol is an orally active, bitter-tasting flavanone that can penetrate the blood-brain barrier. Homoeriodictyol enhances synaptic-related protein expression through NCOA4-mediated ferritin autophagy. Homoeriodictyol improves memory impairment in mice by inhibiting the NLRP3 inflammasome. Homoeriodictyol protects human endothelial cells from oxidative damage by activating Nrf2 and inhibiting mitochondrial dysfunction. Homoeriodictyol enhances ROS activity and induces apoptosis, exhibiting anticancer effects. Homoeriodictyol inhibits the survival and migration of androgen-resistant prostate cancer cells in vitro. Homoeriodictyol exerts antinociceptive activity in mice in vivo.
    Homoeriodictyol
  • HY-149800
    PARP-1-IN-3
    		Inducer 99.30%
    PARP-1-IN-3, a benzamide derivative, is a potent PARP-1 inhibitor with IC50 values of 0.25 nM and 2.34 nM for PARP-1 and PARP-2, respectively. PARP-1-IN-3 induces apoptosis and arrest cell cycle at G2/M phase. PARP-1-IN-3 can be used in research of cancer.
    PARP-1-IN-3
  • HY-15733
    Lucidin
    		Activator 98.03%
    Lucidin (NSC 30546) is a natural component of madder and can induce mutations in bacterial and mammalian cells.
    Lucidin
  • HY-125847
    Salvianolic acid F
    		Agonist 99.30%
    Salvianolic acid F is a KRAS inhibitor, especially for KRAS G12D. Salvianolic acid F inhibits NF-kB, MMP-9, and NO simultaneously. Salvianolic acid F inhibits cancer cell growth, invasion, and migration and induces apoptosis via the EP300/PI3K/AKT pathway in vitro. Salvianolic acid F inhibits the growth of KRAS-dependent lung cancer cells via the PI3K/AKT signaling pathway in vivo. Salvianolic acid F can be used in the research of various cancers, including KRAS G12D-driven non-small cell lung cancer (NSCLC) and ovarian cancer.
    Salvianolic acid F
  • HY-D1652
    Ac-LEHD-AMC
    		Chemical 98.96%
    Ac-LEHD-AMC is a fluorogenic substrate for caspase-9 (Excitation: 341 nm; Emission: 441 nm). Caspase-9 can induce hydrolysis of Ac-LEHD-AMC, resulting in the release of AMC fluorophore and its fluorescence can be used to quantify caspase-9 activity.
    Ac-LEHD-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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