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-P10149
    Ac-IEPD-CHO
    		Inhibitor 99.61%
    Ac-IEPD-CHO is a reversible granzyme B inhibitor with a Ki of 80 nM. Ac-IEPD-CHO is also a caspase-8 inhibitor.
    Ac-IEPD-CHO
  • HY-153068
    CZL55
    		Inhibitor 98.92%
    CZL55 is a caspase-1 inhibitor with an IC50 value of 24 nM. CZL55 can be used for the research of febrile seizures (FS).
    CZL55
  • HY-100894
    Biotin-VAD-FMK
    		Inhibitor ≥98.0%
    Biotin-VAD-FMK is a cell permeable, irreversible biotin-labeled caspase inhibitor, used to identify active caspases in cell lysates.
    Biotin-VAD-FMK
  • HY-N0534
    Vitexin-2"-O-rhamnoside
    		Inhibitor 99.36%
    Vitexin-2"-O-rhamnoside is an orally active flavonoid glycoside. Vitexin-2"-O-rhamnoside inhibits Apoptosis, increases the phosphorylation levels of PI3K/Akt, inhibits caspase-3, SOD activity, and promotes cytokine (IL-2, IL-6, and IL-12) secretion. Vitexin-2"-O-rhamnoside strongly inhibits DNA synthesis in MCF-7 cells with an IC50 of 17.5 μM. Vitexin-2"-O-rhamnoside enhances immune function and improves the absorption of active compounds. Vitexin-2"-O-rhamnoside has antioxidant activity. Vitexin-2"-O-rhamnoside is used in the study of cardiovascular disease and immune-related diseases.
    Vitexin-2
  • 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-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-147293
    Nenocorilant
    		Inducer 99.72%
    Nenocorilantis a potent, orally activity glucocorticoid receptor (GR) antagonist with Ki value of 0.15 nM. Nenocorilant has pro-apoptotic effects and improves potency combined with cytotoxic agent. Nenocorilant can be used for cancer research.
    Nenocorilant
  • 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-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-123230
    Trifloxystrobin
    		99.49%
    Trifloxystrobin (CGA 279202) is a type of fungicide. Trifloxystrobin has toxicity, antiparasitic activity and induce apoptosis, oxidative stress and DNA damage. Trifloxystrobin can be used for the reaesrch of fungal diseases.
    Trifloxystrobin
  • HY-10805A
    Almorexant hydrochloride
    		Activator 99.98%
    Almorexant (ACT 078573) hydrochloride is an orally active, potent and competitive dual orexin receptor antagonist, with Kd values of 1.3 nM (OX1) and 0.17 nM (OX2), respectively. Almorexant hydrochloride reversibly blocks signaling of orexin-A and orexin-B peptides. Almorexant hydrochloride totally blocked the intracellular Ca2+ signal pathway. Almorexant hydrochloride stimulates caspase-3 activity in AsPC-1 cells and induces apoptosis.
    Almorexant hydrochloride
  • 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-125911
    Gossypin
    		Inducer 98.04%
    Gossypin is an orally active flavone isolated from Hibiscus vitifolius. Gossypin has antioxidant, antiinflammatory, anticancer, anticataract, antidiabetic, and hepatoprotective activities. Gossypin inhibits NF-κB and NF-κB-regulated gene expression. Gossypin inhibits AURKA and RSK2. Gossypin inhibits invasion and induces apoptosis. Gossypin can be used for gastric cancer study.
    Gossypin
  • HY-18712
    BG45
    		Inhibitor 99.96%
    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-12286
    PI-1840
    		Inducer 98.78%
    PI-1840 is a potent and selective chymotrypsin-like (CT-L) inhibitor for with an IC50 value of 27 nM. PI-1840 inhibits cell proliferation and arrest cell cycle at G2/M phase. PI-1840 induces apoptosis and induces autophagy. PI-1840 induces the accumulation of proteasome substrates p27, Bax, and IκB-α.
    PI-1840
  • HY-107150
    Reproxalap
    		Inhibitor 98.85%
    Reproxalap (ADX-102) is an active aldehyde sequestering agent. Reproxalap reduces the PKCα activity. Reproxalap blocks caspase 3/7 activation. Reproxalap protects cells from the cytotoxicity of C18:0-al. Reproxalap has anti-inflammatory and pain-relieving effects. Reproxalap is used in studies of dry eye, allergic conjunctivitis, and non-infectious anterior uveitis.
    Reproxalap
  • HY-100676
    GRI977143
    		Inhibitor 99.84%
    GRI977143 is a specific LPA2 receptor agonist, with an EC50 of 3.3 μM .
    GRI977143
  • HY-113953
    Z-Asp-CH2-DCB
    		Inhibitor 99.64%
    Z-Asp-CH2-DCB is an irreversible broad spectrum caspase inhibitor. Z-Asp-CH2-DCB also inhibits proteases with caspase-like activity. Z-D-CH2-DCB blocks the production of IL-1β, TNF-α, IL-6, and IFN-γ in staphylococcal enterotoxin B (SEB)-stimulated peripheral blood mononuclear cells (PBMC), and reduces SEB-1-stimulated T-cell proliferation in a dose-dependent manner. Z-Asp-CH2-DCB prevents SU5416-induced septal cell apoptosis and emphysema development.
    Z-Asp-CH2-DCB
  • HY-N2518
    Agnuside
    		Inhibitor 99.90%
    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
  • HY-W041489
    Chelidonic acid
    		Inhibitor 99.91%
    Chelidonic acid is a component of Chelidonium majus L., used as an antimicrobial. Chelidonic acid also shows anti-inflammatory activity. Chelidonic acid has potential to inhibit IL-6 production by blocking NF-κB and caspase-1. Chelidonic acid is a glutamate decarboxylase inhibitor, with a Ki of 1.2 μM.
    Chelidonic acid
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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