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-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-100543R
    Zenidolol (Standard)
    Activator
    Zenidolol (ICI-118551) (Standard) is the analytical standard of Zenidolol (HY-100543). This product is intended for research and analytical applications. Zenidolol is a selective β2-adrenergic receptor antagonist with Ki values of Zenidolol for β2, β1 and β3 adrenergic receptors of 0.7, 49.5 and 611 nM, respectively. Zenidolol exerts antitumor effects via inducing apoptosis, inhibiting tumor sphere formation, and downregulating the HIF pathway by blocking β2-AR on tumor cells. Zenidolol exhibits a unique pulmonary vessel-specific vasodilatory effect in mouse models. Zenidolol can be used as an intraocular pressure-lowering agent in ophthalmic disease research.
    Zenidolol (Standard)
  • HY-N5042R
    Forsythoside I (Standard)
    Inhibitor
    Forsythoside I (Standard) is the analytical standard of Forsythoside I (HY-N5042). This product is intended for research and analytical applications. Forsythoside I is an orally active caffeoyl phenylethanoid glycoside (CPG) that can be isolated from Forsythia suspense (Thunb.) Vahl. Forsythoside I has anti-inflammatory activity and can exert a protective effect in a mouse model of acute lung injury.
    Forsythoside I (Standard)
  • 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-110038
    FTI-277 TFA
    Activator
    FTI-277 TFA is a farnesyltransferase (FTase) inhibitor. FTI-277 TFA inhibits Ras farnesylation, blocks the phosphorylation of downstream ERK1/2 and mTOR, and reduces membrane-bound active N-ras protein. FTI-277 TFA activates caspase 3, upregulates Bim expression, induces cell apoptosis, suppresses regulatory T cell expansion, enhances macrophage phagocytosis, and improves bacterial clearance. FTI-277 TFA activates the PI3K/Akt signaling pathway, inhibits osteoblast differentiation, and reduces the proliferation ability of neuroblastoma cells. FTI-277 TFA can be used in research related to head and neck squamous cell carcinoma, neuroblastoma, sepsis, and vascular calcification.
    FTI-277 TFA
  • HY-103346R
    MMPSI (Standard)
    Inhibitor
    MMPSI (Standard) is the analytical standard of MMPSI (HY-103346). This product is intended for research and analytical applications. MMPSI is a potent and selective small molecule caspase 3 and caspase 7 inhibitor with an IC50 of 1.7 μM for human caspase-3. MMPSI can significantly reduce ischemia-reperfusion-induced infarct size in the isolated rabbit heart, and reduce apoptosis in both the ischemic myocardium and isolated cardiomyocytes. MMPSI can be used for researching cardioprotection.
    MMPSI (Standard)
  • 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-101310R
    SYM 2081 (Standard)
    SYM 2081 (Standard) is the analytical standard of SYM 2081 (HY-101310). This product is intended for research and analytical applications. SYM 2081 is a kainate receptor agonist. SYM 2081 is a substrate of EAAT1 (Km of 54 μM). SYM 2081 inhibits EAAT2-mediated glutamate transport (Kb is 3.4 μM in Xenopus oocytes), modulates Apoptotic signaling pathways (increases Bcl-2 and decreases Bax/caspase-3 expression). SYM 2081 exhibits neuroprotective activity. SYM 2081 can be used in the study of hypoxic-ischemic brain damage and inflammatory or neuropathic pain.
    SYM 2081 (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-101985R
    BV02 (Standard)
    BV02 (Standard) is the analytical standard of BV02 (HY-101985). This product is intended for research and analytical applications. BV02 is a 14-3-3 inhibitor and an antibacterial agent. BV02 enhances the cleavage of PARP and caspase-3. BV02 induces Apoptosis, Autophagy, and enhances Akt activation. BV02 has anti-B. melitensis infection and epilepsy-promoting effects. BV02 can also be used in colitis research.
    BV02 (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
  • HY-13326R
    ASP3026 (Standard)
    ASP3026 (Standard) is the analytical standard of ASP3026. This product is intended for research and analytical applications. ASP3026 is a selective and orally active inhibitor of anaplastic lymphoma kinase (ALK). ASP3026 is a selective and oral active anaplastic lymphoma kinase (ALK) inhibitor with a IC50 value of 3.5 nM. ASP3026 can inhibit the phosphorylation of IGF-1R, STAT3, AKT and JNK proteins, and induce the cleavage of caspase 3 and PARP. It also inhibited ROS and ACK. ASP3026 can be used in anti-tumor research.
    ASP3026 (Standard)
  • HY-183942
    USP7-IN-20
    Activator
    USP7-IN-20 is a highly selective USP7 inhibitor that binds allosterically to the allosteric pocket of USP7 in a non-competitive and reversible manner. USP7-IN-20 downregulates MDM2 protein levels and stabilizes p53, thereby inducing p21 expression and enhancing the ubiquitin-dependent degradation of MDM2. USP7-IN-20 effectively binds endogenous USP7 to inhibit cancer cell proliferation, and also induces apoptosis by promoting the cleavage of PARP and caspase 3. USP7-IN-20 can be widely used in cancer-related basic and translational research.
    USP7-IN-20
  • HY-N0534R
    Vitexin-2"-O-rhamnoside (Standard)
    Inhibitor
    Vitexin-2"-O-rhamnoside (Standard) is the analytical standard of Vitexin-2"-O-rhamnoside (HY-N0534). This product is intended for research and analytical applications. 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-B0553R
    Methazolamide (Standard)
    Inhibitor
    Methazolamide (Standard) is the analytical standard of Methazolamide. This product is intended for research and analytical applications. Methazolamide (L584601) is a BBB-penetrable and orally active carbonic anhydrase inhibitor, with a Ki of 14 nM for human carbonic anhydrase II. Methazolamide can reduce intraocular pressure and has a neuroprotective effect, being able to inhibit neuronal apoptosis. Methazolamide can be used in the research of ophthalmic diseases such as glaucoma and cerebrovascular diseases such as subarachnoid hemorrhage.
    Methazolamide (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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