1. Signaling Pathways
  2. Apoptosis
  3. Caspase

Caspase

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.

Cat. No. Product Name Effect Purity Chemical Structure
  • HY-N6951R
    Guaiazulene (Standard)
    Guaiazulene (Standard) is the analytical standard of Guaiazulene (HY-N6951). This product is intended for research and analytical applications. Guaiazulene is a bicyclic sesquiterpene that can cross the blood-brain barrier. Guaiazulene exhibits various biological activities such as anti-inflammatory, antioxidant, hepatoprotective, antibacterial, and anti-tumor properties. Guaiazulene is also commonly used as a colorant in cosmetics. Guaiazulene shows in vitro cytotoxicity to rat neuronal cells and N2a neuroblastoma cells at high concentrations.
    Guaiazulene (Standard)
  • HY-16232R
    Glufosfamide (Standard)
    Activator
    Glufosfamide (Standard) is the analytical standard of Glufosfamide. This product is intended for research and analytical applications. Glufosfamide is a glucose-conjugated alkylating cytotoxic agent and a derivative of Ifosfamide (HY-17419). Glufosfamide induces apoptosis frequency and increase the expression of caspase-9 and caspase-3 in cancer cells. Glufosfamide shows great anti-tumor activity in MiaPaCa-2-RFP mouse model. Glufosfamide can be used for the study of hepatocellular carcinoma, prostate cancer and pancreatic carcinoma.
    Glufosfamide (Standard)
  • HY-B0420AR
    Moroxydine hydrochloride (Standard)
    Inhibitor
    Moroxydine (ABOB) hydrochloride (Standard) is the analytical standard of Moroxydine (ABOB) hydrochloride (HY-B0420A). Moroxydine (ABOB) hydrochloride is a broad-spectrum agent with multi-antiviral activities against DNA and RNA viruses, including influenza virus, herpes simplex, varicella zoster, measles, mumps disease, hepatitis C virus, etc. Moroxydine hydrochloride exhibits excellent antiviral activity and shows low cytotoxicity to cells infected by dsRNA viruses (grass carp reovirus, GCRV) and large DNA viruses (giant salamander iridovirus, GSIV). Moroxydine hydrochloride blocks the GCRV-induced cytopathic effects and eliminates nucleocapsids in ctenopharyngodon idella kidney (CIK) cells to keep the normal morphological structure. Moroxydine hydrochloride significantly inhibits the apoptosis, the caspase 3 activity, Bax expression and down-regulates Bcl-2 levels.
    Moroxydine hydrochloride (Standard)
  • HY-171447
    LPT99
    Inhibitor
    LPT-99 is an antagonist of apoptotic protease activating factor 1 (APAF-1). LPT-99 suppresses the activation of procaspase-9. LPT99 suppresses Cisplatin (HY-17394)-induced apoptosis. LPT99 can effectively mitigate cisplatin-induced hearing loss in rats.
    LPT99
  • HY-14584A
    PQ-1 succinate
    Inhibitor
    PQ-1 succinate is an inhibitor for gap junction, which suppresses the gap junction dye transfer activity in retinal neurosensory R28 cells, and inhibits the CoCl2-induced ischemic apoptosis in retinal cell.
    PQ-1 succinate
  • HY-16658C
    Z-VA-DL-D-FMK
    Inhibitor
    Z-VA-DL-D-FMK (Z-VA-DL-D(OH)-FMK) is an inhibitor for caspase. Z-VA-DL-D-FMK binds irreversibly to caspases, increases the sensitivity of TNF-α, and activates HIV replication in infected T cell ACH-2.
    Z-VA-DL-D-FMK
  • HY-N8210R
    Homoeriodictyol (Standard)
    Homoeriodictyol (Standard) is the analytical standard of Homoeriodictyol (HY-N8210). This product is intended for research and analytical applications. 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 (Standard)
  • HY-N0257R
    Epimedin A (Standard)
    Inhibitor
    Epimedin A (Standard) is the analytical standard of Epimedin A (HY-N0257). This product is intended for research and analytical applications. Epimedin A, one of the main flavonoid active components in Herba Epimedii, is orally active. Epimedin A can inhibit osteoclastogenesis, differentiation, and bone resorption. Epimedin A also possesses anti-inflammatory activity. Epimedin A can be used in the research of osteoporosis and inflammatory diseases.
    Epimedin A (Standard)
  • HY-107738R
    Guggulsterone (Standard)
    Activator
    Guggulsterone (Standard) is the analytical standard of Guggulsterone (HY-107738). This product is intended for research and analytical applications. 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, with IC50s of 24.06 μM and 39.05 μM for (-)-(E)-Guggulsterone (HY-N7781) and (Z)-Guggulsterone (HY-110066), respectively.
    Guggulsterone (Standard)
  • HY-N2518R
    Agnuside (Standard)
    Inhibitor
    Agnuside (Standard) is the analytical standard of Agnuside. This product is intended for research and analytical applications. Agnuside is used in the study of asthma, inflammation, and angiogenic diseases. Agnuside is an orally active compound that can be extracted from Vitex negundo.
    Agnuside (Standard)
  • HY-B1138R
    Fenbufen (Standard)
    Inhibitor
    Fenbufen (Standard) is the analytical standard of Fenbufen. This product is intended for research and analytical applications. Fenbufen (CL-82204) is an orally active non-steroidal anti-inflammatory drug (NSAID), with analgetic and antipyretic effects. Fenbufen has potent activity in a variety of animal model, including carageenin edema, UV erythema and adjuvant arthritis. Fenbufen has inhibitory activities against COX-1 and COX-2 with IC50s of 3.9 μM and 8.1 μM, respectively. Fenbufen is a caspases (caspase-1, 3, 4, 5, 9) inhibitor.
    Fenbufen (Standard)
  • HY-N1431A
    Tabersonine hydrochloride
    Inhibitor
    Tabersonine hydrochloride is a selective, orally active NLRP3 inhibitor. Tabersonine hydrochloride 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 hydrochloride also inhibits K63-linked ubiquitination of TRAF6, blocking NF-κB, PI3K/Akt, and p38 MAPK signaling pathways. Tabersonine hydrochloride 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 hydrochloride 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 hydrochloride
  • HY-W033813
    Caspase-3/7 Inhibitor I
    Inhibitor 98.31%
    Caspase-3/7 inhibitor I is a potent and reversible inhibitor of caspase-3 and caspase-7, with Kis of 60 and 170 nM, respectively. Caspase-3/7 inhibitor I can inhibit apoptosis in Camptothecin (HY-16560)-treated Jurkat cells and in chondrocytes.
    Caspase-3/7 Inhibitor I
  • HY-162059
    Pim-1 kinase inhibitor 10
    Activator
    Pim-1 kinase inhibitor 10 (compound 13a) is a both competitive and non-competitive inhibitor of PIM-1/2 kinase. Pim-1 kinase inhibitor 10 can induce cell apoptosis and exhibits anticancer activity. Pim-1 kinase inhibitor 10 also induces caspase 3/7 activation.
    Pim-1 kinase inhibitor 10
  • HY-B0347R
    Lacidipine (Standard)
    Modulator
    Lacidipine (Standard) is the analytical standard of Lacidipine. This product is intended for research and analytical applications. Lacidipine is an orally active and highly selective L-type calcium channel blocker that acts on smooth muscle calcium channels, primarily dilates peripheral arteries, reduces peripheral resistance, and has long-lasting anti-hypertensive activity. Lacidipine protects HKCs from apoptosis induced by ATP depletion and recovery by modulating the caspase-3 pathway. Lacidipine can be used in studies of hypertension, atherosclerosis and acute kidney injury (AKI).
    Lacidipine (Standard)
  • HY-129440R
    N-(p-Coumaroyl) Serotonin (Standard)
    Inhibitor
    N-(p-Coumaroyl) Serotonin (Standard) is the analytical standard of N-(p-Coumaroyl) Serotonin. This product is intended for research and analytical applications. N-(p-Coumaroyl) Serotonin is a polyphenol isolated from the seeds of safflower and has antioxidative, anti-atherogenic and anti-inflammatory properties. N-(p-Coumaroyl) Serotonin inhibits PDGF-induced on phosphorylation of PDGF receptor and Ca2+ release from sarcoplasmic reticulum. N-(p-Coumaroyl) Serotonin ameliorates atherosclerosis and distensibility of the aortic wall in vivo and is usually used for the atherosclerosis research.
    N-(p-Coumaroyl) Serotonin (Standard)
  • HY-W011683S7
    2'-Deoxyadenosine monohydrate-15N5
    Activator
    2'-Deoxyadenosine monohydrate-15N5 is the 15N labeled 2'-Deoxyadenosine monohydrate (HY-W011683). 2′-Deoxyadenosine monohydrate is an adenine nucleoside that inhibits glucose-stimulated insulin release. 2′-Deoxyadenosine monohydrate inhibits glucose-stimulated increases seen in islet cyclic AMP (cAMP) accumulation. 2'-Deoxyadenosine monohydrate activates caspase-3 and promotes apoptosis. 2'-Deoxyadenosine monohydrate inhibits the activity of S-adenosyl-L-homocysteine hydrolase (SAHH). 2'-Deoxyadenosine monohydrate inhibits the growth of various cells. 2'-Deoxyadenosine monohydrate has an anticancer effect on colon cancer.
    2'-Deoxyadenosine monohydrate-<sup>15</sup>N<sub>5</sub>
  • HY-17548
    VMY-1-103
    Activator
    VMY-1-103 is an inhibitor for cyclin/Cdk complex, that arrests the cell cycle at G1 phase. VMY-1-103 reduces mitochondrial membrane potential, induces p53 phosphorylation and and PARP cleavage, activates caspase-3, and thus induces apoptosis in prostate cancer cell LNCaP.
    VMY-1-103
  • HY-N2993R
    Polyporenic acid C (Standard)
    Activator
    Polyporenic acid C (Standard) is an analytical standard of Polyporenic acid C (HY-N2993). This product is intended for research and analytical applications. Polyporenic acid C is a lanostane-type triterpenoid. Polyporenic acid C can be isolated from Poria cocos. Polyporenic acid C causes the cleavage of caspase-8 and caspase-3, as well as the cleavage of PARP. Polyporenic acid C reduces the phosphorylation level of Akt (Ser473), increases the phosphorylation of PTEN and p53 (Ser15), and activates JNK. Polyporenic acid C induces Apoptosis. Polyporenic acid C shows anticancer activity against non-small cell lung cancer.
    Polyporenic acid C (Standard)
  • HY-B1357R
    Digitoxin (Standard)
    Digitoxin (Standard) is the analytical standard of Digitoxin. This product is intended for research and analytical applications. 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 (Standard)
Cat. No. Product Name / Synonyms Species Source
Cat. No. Product Name / Synonyms Application Reactivity

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.

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