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-N1970
    5,7-Dihydroxychromone
    		Activator 99.94%
    5,7-Dihydroxychromone, the extract of Cudrania tricuspidata, activates Nrf2/ARE signal and exerts neuroprotective effects against 6-hydroxydopamine (6-OHDA)-induced oxidative stress and apoptosis. 5,7-Dihydroxychromone inhibits the expression of activated caspase-3 and caspase-9 and cleaved PARP in 6-OHDA-induced SH-SY5Y cells.
    5,7-Dihydroxychromone
  • HY-103348
    Boc-Asp(OMe)-fluoromethyl ketone
    		Inhibitor 98.0%
    Boc-Asp(OME)-Fluoromethyl Ketone is a broad range caspase inhibitor that inhibits Fas-mediated phagocytosis and oxidative rupture inhibition, but does not affect the chemotactic activity of IL-8.
    Boc-Asp(OMe)-fluoromethyl ketone
  • HY-115630
    cRIPGBM chloride
    		Activator 99.82%
    cRIPGBM chloride, an orally active, proapoptotic derivative. cRIPGBM can be generated from glioblastoma multiforme (GBM) cancer stem cells (CSCs). cRIPGBM(chloride) targets to receptor-interacting protein kinase 2 (RIPK2) to induce caspase 1-dependent apoptosis. cRIPGBM(chloride) suppresses the formation of RIPK2/TAK1 (prosurvival complex), and increases the formation of RIPK2/caspase 1 (proapoptotic complex). cRIPGBM(chloride) exerts potent anti-tumor activity in vivo in animal models.
    cRIPGBM chloride
  • HY-18712
    BG45
    		Inhibitor 99.95%
    BG45 is a potent HDAC3 inhibitor with IC50 values of 0.289, 2, 2.2 and ﹥20 μM for HDAC3, HDAC1, HDAC2 and HDAC6, respectively. BG45 selectively targets multiple myeloma (MM) cells and induces caspase-dependent apoptosis.
    BG45
  • HY-N0905
    Ginsenoside Rh4
    		Activator 99.28%
    Ginsenoside Rh4 is a rare saponin obtained from Panax notoginseng. Ginsenoside Rh4 activates Bax, caspase 3, caspase 8, and caspase 9. Ginsenoside Rh4 also induces autophagy.
    Ginsenoside Rh4
  • HY-154795
    Magnesium isoglycyrrhizinate hydrate
    		Inhibitor 99.81%
    Magnesium isoglycyrrhizinate hydrate is the active component found in licorice plant (Glycyrrhiza glabra). Magnesium isoglycyrrhizinate hydrate exhibits anti-inflammatory activity through NLRP3 inflammasome pathway, and attenuates the chronic obstructive pulmonary disease in rats.
    Magnesium isoglycyrrhizinate hydrate
  • HY-15472
    PRX-08066
    		Inhibitor
    PRX-08066 is a selective and orally active 5-hydroxytryptamine receptor 2B (5-HT2BR) antagonist with a Ki of 3.4 nM. PRX-08066 inhibits the MAPK pathway, 5-HT release and fibrotic factor (TGFβ1, CTGF and FGF2) expression. PRX-08066 inhibits the proliferation of KRJ-I cells and induces apoptosis (caspase-3 activation). PRX-08066 inhibits pulmonary vascular remodeling. PRX-08066 can be used of pulmonary Arterial Hypertension (PAH) and neuroendocrine tumor (NET).
    PRX-08066
  • HY-N11774
    Euphornin
    		Modulator 98.09%
    Euphornin is a anticaner agent, that can be isolated from E. helioscopia. Euphornin induces apoptosis via caspase-mediated pathways. Euphornin induces cell cycle arrest by increasing the level of the phospho-CDK1 (Tyr15) protein.
    Euphornin
  • HY-B1138
    Fenbufen
    		Inhibitor 99.33%
    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
  • HY-125305
    Z-AEVD-FMK
    		Inhibitor
    Z-AEVD-FMK is a caspase-10 inhibitor. Z-AEVD-FMK can inhibit the activation of Bid and the release of apoptosis-inducing factor (AIF) in mitochondria in cells, resulting in a significant decrease in the number of apoptotic cells.
    Z-AEVD-FMK
  • HY-N3239
    Mulberrofuran G
    		Inhibitor 99.84%
    Mulberrofuran G is a NOX inhibitor (IC50: 6.9 μM) and tyrosinase inhibitor. Mulberrofuran G exhibits anti-inflammatory, antioxidant, antiviral, antitumor, and neuroprotective effects. Mulberrofuran G can be used in the research of tumors, nervous system diseases, and other conditions.
    Mulberrofuran G
  • HY-P1823
    C-Reactive Protein (CRP) (174-185)
    		Inhibitor 99.88%
    C-Reactive Protein (CRP) is an anti-pneumococcal plasma protein that can serve as an inflammatory marker. C-Reactive protein can protect mice from pneumococcal infection by activating complement. C-Reactive protein can inhibit the activation of caspase-3/9 through the CD64/AKT/mTOR pathway, thereby promoting chemotherapy resistance in mice with tongue squamous cell carcinoma.
    C-Reactive Protein (CRP) (174-185)
  • HY-N6801
    Nivalenol
    		Activator 99.24%
    Nivalenol, classified as type B trichotecenes toxins produced by Fusarium graminearum, is a fungal metabolite present in agricultural product. Nivalenol induces cell death through caspase-dependent mechanisms and via the intrinsic apoptotic pathway. Nivalenol affects the immune system, causes emesis, growth retardation, reproductive disorders and has a haematotoxic/myelotoxic effect.
    Nivalenol
  • HY-136727
    Ac-LEVD-CHO
    		Inhibitor 98.41%
    Ac-LEVD-CHO is a caspase-4 inhibitor. Ac-LEVD-CHO is a peptide with the sequence of Ac-Leu-Glu-Val-Asp-al.
    Ac-LEVD-CHO
  • HY-136975
    Caspase-3-IN-1
    		Inhibitor
    Caspase-3-IN-1 (compound 11b) is a potent Caspase-3 inhibitor, with an IC50 of 14.5 nM.
    Caspase-3-IN-1
  • HY-N6777
    Penicillic acid
    		Inhibitor 99.83%
    Penicillic acid is a polyketide mycotoxin produced by several species of Aspergillus and Penicillium. Penicillic acid exhibits cytotoxicity in rat alveolar macrophages (AM) in vitro. Penicillic acid inhibits Fas ligand-induced apoptosis by blocking self-processing of caspase-8.
    Penicillic acid
  • HY-W040329R
    2'-Deoxyadenosine (Standard)
    		Activator
    2'-Deoxyadenosine (Standard) is the analytical standard of 2'-Deoxyadenosine (HY-W040329). This product is intended for research and analytical applications. 2′-Deoxyadenosine is an adenine nucleoside that inhibits glucose-stimulated insulin release. 2′-Deoxyadenosine inhibits glucose-stimulated increases seen in islet cyclic AMP (cAMP) accumulation. 2'-Deoxyadenosine activates caspase-3 and promotes apoptosis. 2'-Deoxyadenosine inhibits the activity of S-adenosyl-L-homocysteine hydrolase (SAHH). 2'-Deoxyadenosine inhibits the growth of various cells. 2'-Deoxyadenosine has an anticancer effect on colon cancer.
    2'-Deoxyadenosine (Standard)
  • HY-153161
    CASP8-IN-1
    		Inhibitor 98.97%
    CASP8-IN-1 (Compound 63-R) is a selective inhibitor for caspase 8 (CASP8), with an IC50 of 0.7 μM. CASP8-IN-1 inhibits FasL-induced apoptosis in cell Jurkat.
    CASP8-IN-1
  • HY-120833
    Ac-Ile-Glu-Thr-Asp-pNA
    		99.90%
    Ac-Ile-Glu-Thr-Asp-pNA is a substrate for caspase-8. Caspase-8 binds to and cleaves the Ile-Glu-Thr-Asp (IETD) peptide sequence to release p-nitroalinide, which can be quantified by colorimetric detection at 405 nm as a measure of enzyme activity.
    Ac-Ile-Glu-Thr-Asp-pNA
  • HY-155612
    M826
    		Inhibitor 99.75%
    M826 is a potent, selective and reversible non-peptide caspase-3 inhibitor with an IC50 value of 0.005 μM for enzymatic activity against caspase-3. M826 displays potent anti-apoptotic activity in animal models in vitro and in vivo. M826 can be used for nervous system diseases research.
    M826
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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