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-13229R
    BOC-D-FMK (Standard)
    		Inhibitor
    BOC-D-FMK (Standard) is the analytical standard of BOC-D-FMK. This product is intended for research and analytical applications. 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 (Standard)
  • HY-10805R
    Almorexant (Standard)
    		Activator
    Almorexant (Standard) is the analytical standard of Almorexant. This product is intended for research and analytical applications. Almorexant (ACT 078573) 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 reversibly blocks signaling of orexin-A and orexin-B peptides. Almorexant totally blocked the intracellular Ca2+ signal pathway. Almorexant stimulates caspase-3 activity in AsPC-1 cells and induces apoptosis .
    Almorexant (Standard)
  • HY-N2014R
    Verbenalin (Standard)
    		Inhibitor
    Verbenalin (Standard) is the analytical standard of Verbenalin. This product is intended for research and analytical applications. Verbenalin is an orally active terpenoid glycoside that can be extracted from the medicinal plant Verbena officinalis. Verbenalin has anti-inflammatory, antiviral, and neuroprotective effects. Verbenalin has a strong binding affinity to the nsp-12 protein of the SARS-CoV-2 virus. Verbenalin can be used in the research of inflammatory and nervous system diseases such as hepatitis and Alzheimer's disease.
    Verbenalin (Standard)
  • HY-W338079
    Ac-Asp-Glu-Val-Asp-pNA
    		Substrate
    Ac-Asp-Glu-Val-Asp-pNA is a peptidic substrate of caspase-3/7.
    Ac-Asp-Glu-Val-Asp-pNA
  • HY-124134
    AD-2646
    		Activator
    AD-2646 (LCL102), a ceramide analog, can kill leukemic T cells (EC50: 40 μM). AD-2646 triggers the cleavage of caspase-8, -9 and -3, as well as the caspase substrate PARP. AD-2646 is a ceramidase inhibitor. AD-2646 induces an accumulation of endogenous ceramide owing to perturbed ceramide metabolism.
    AD-2646
  • HY-110102
    Atiprimod hydrochloride
    		Activator
    Atiprimod (Azaspirane) hydrochloride is a STAT3 inhibitor with antitumor, anti-inflammatory, and anti-angiogenic activities. Atiprimod blocks the signaling pathways of IL-6 and VEGF by inhibiting the phosphorylation of signal transducer and activator of STAT3. Atiprimod blocks the JAK-STAT signaling pathway by inhibiting the phosphorylation of JAK2 and JAK3. Atiprimod also inhibits cell proliferation, induces cell cycle arrest, and induces autophagy and apoptosis. Atiprimod triggers persistent ER stress-mediated apoptosis in breast cancer cells by activating the PERK/eIF2α/ATF4/CHOP axis and inhibiting the nuclear translocation of STAT3/NF-κB. Atiprimod shows great anti-tumor activities in tumor xenograft mouse models. Atiprimod can be used for the study of pituitary adenoma, breast cancer, multiple myeloma and acute myeloid leukemia (AML).
    Atiprimod hydrochloride
  • HY-126365
    Alisol B acetate
    		Activator
    Alisol B acetate is a Triterpenoids product that can be isolated from the tubers of Alisma plantago-aquatica Linn..
    Alisol B acetate
  • HY-B1135R
    Benzbromarone (Standard)
    Benzbromarone (Standard) is the analytical standard of Benzbromarone. This product is intended for research and analytical applications. 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 (Standard)
  • HY-117136
    AN-7
    		Activator
    AN-7 is an orally active histone deacetylase (HDAC) inhibitor that induces histone hyperacetylation and differentiation in vitro and in vivo, and inhibits the proliferation of human prostate 22Rv1 cancer cells. AN-7 can increase the expression of the pro-apoptotic protein Bax, reduce the expression of the anti-apoptotic protein Bcl-2, and promote apoptosis by activating caspase-3, and can be used in the study of prostate cancer.
    AN-7
  • HY-B1392A
    Esmolol
    		Inhibitor
    Esmolol is an ultra-short-acting cardioselective β1-adrenergic blocker. Esmolol exerts its antiarrhythmic effect by activating Neurokinin 1 Receptor. Esmolol attenuates post resuscitation myocardial dysfunction. Esmolol improves diabetic wound healing by inhibiting aldose reductase and the production of advanced glycation end products and promoting fibroblast migration. Esmolol can be used to study cardiac diseases such as arrhythmias and diabetic foot ulcers.
    Esmolol
  • HY-N7000R
    Perillyl alcohol (Standard)
    		Activator
    Perillyl alcohol (Standard) is the analytical standard of Perillyl alcohol (HY-N7000). Perillyl alcohol is an orally active monoterpene. Perillyl alcohol exhibits multiple activities such as analgesic, anti-inflammatory, anti-tumor, anti-angiogenic, and anti-nociceptive effects. Perillyl alcohol can induce apoptosis and cell cycle arrest in tumor cells.
    Perillyl alcohol (Standard)
  • HY-123185
    (Rac)-Z-FA-FMK
    		Inhibitor
    (Rac)-Z-FA-FMK is the racemate of Z-FA-FMK. (Rac)-Z-FA-FMK is an inhibitor of cathepsin B with a Ki of 1.5 μM. (Rac)-Z-FA-FMK inhibits caspase-2, -3, -6, -7, and -9 with IC50s of 6.147, 15.41, 32.45, 9.077, and 110.7 μM. (Rac)-Z-FA-FMK inhibits the main protease of SARS-CoV-2 replication with an IC50 of 11.39 μM. (Rac)-Z-FA-FMK inhibits the increased IL-1β level induced by LPS and NF-κB transactivation in macrophages.
    (Rac)-Z-FA-FMK
  • HY-P10666
    Ac-VDQQD-pNA
    Ac-VDQQD-pNA is a substrate of Caspase 2 and can be cleaved to produce yellow pNA (p-nitroaniline).
    Ac-VDQQD-pNA
  • HY-N0716
    Berberine
    		Inhibitor
    Berberine (Natural Yellow 18) is an alkaloid isolated from the Chinese herbal medicine Huanglian, as an antibiotic. Berberine (Natural Yellow 18) induces reactive oxygen species (ROS) generation and inhibits DNA topoisomerase. Berberine (Natural Yellow 18) has antineoplastic properties. The sulfate form (HY-N0716B) improves bioavailability.
    Berberine
  • HY-N2013R
    Aristolactam I (Standard)
    		Inhibitor
    Aristolactam I (Standard) is the analytical standard of Aristolactam I. This product is intended for research and analytical applications. Aristolactam I is an AQP1 inhibitor and Aristolochic acid I metabolite. Aristolactam I can be isolated from Aristolochia plants. Aristolactam I downregulates Twist1 expression, increases E-cadherin expression, and activates the TGF-β/Smad signaling pathway. Aristolactam I has anticancer activity against breast cancer. Aristolactam I is nephrotoxic. Aristolactam I is mainly used in the study of breast cancer and kidney diseases such as renal interstitial fibrosis.
    Aristolactam I (Standard)
  • HY-W415273
    Caspase-3-IN-2
    		Inhibitor
    Caspase-3-IN-2 (Compound 4d) is the inhibitor for α-Chymotrypsin. Caspase-3-IN-2 also exhibits inhibitory activity against HIV protease and caspase 3 with an inhibition rate of 57% and 51% at 100 μM.
    Caspase-3-IN-2
  • HY-B1138S
    Fenbufen-d9
    		Inhibitor
    Fenbufen-d9 (CL-82204-d9) is the deuterium labeled Fenbufen. Fenbufen (CL-82204) is an orally active non-steroidal anti-inflammatory drug (NSAID), with 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-d<sub>9</sub>
  • HY-B2046R
    Simazine (Standard)
    Simazine (Standard) is the analytical standard of Simazine (HY-B2046). This product is intended for research and analytical applications. Simazine is a triazine herbicide. Simazine is widely used in agriculture, potted plant and tree production. In addition, Simazine can induce the apoptosis of immune cells in the spleen of mice and inhibit the proliferation of B cells and T cells in mice.
    Simazine (Standard)
  • HY-N0758R
    Barlerin (Standard)
    Barlerin (Standard) is the analytical standard of Barlerin. This product is intended for research and analytical applications. 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 (Standard)
  • HY-111523
    Isomahanine
    		Activator
    Isomahanine, carbazole alkaloid, is an antioxidative agent. Isomahanine has DPPH radical scavenging activity with an IC50 value of 24 μM.
    Isomahanine
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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