pyroptosis

Disulfiram (TETD) is an inhibitor of the acetaldehyde dehydrogenase ALDH, inhibiting hALDH1 and hALDH2 (IC50=0.15 1.45 μM) with specificity. Disulfiram is acutely sensitized to alcohol and also inhibits GSDMD pore formation.

Caspase-3 activator 1 (compound 4b), a Ru(III) metal complex, effectively inhibits gastric tumor growth and metastasis by mediating caspase-3 cleavage, enabling Caspase-3 to process gasdermin E (GSDME), resulting in GSDME-N terminus production and perforation of the gastric tumor cell membrane. Furthermore, compound 4b induces pyroptosis and subsequent immune responses and can be incorporated with decitabine (DCT) into the 4b-DCT-Lip lipid delivery system [1].

ZIF-8 is an anticancer agent that can inherently trigger pyroptosis through a caspase-1 gasdermin D (GSDMD)-dependent pathway.

NLRP3-IN-72 (Compound 2) is a benzimidazole derivative. It exhibits anti-inflammatory and antioxidant properties, with an IC50 of 0.3 μM for NLRP3 IL-1β, a PD50 of 0.4 μM for protection against cell pyroptosis, and an EC50 of 0.6 μM for inducing HO-1.

NLRP3-IN-60 (Compound 39) is an orally bioavailable inhibitor of NLRP3. It effectively suppresses pyroptosis in THP-1 cells with an IC50 of 13 nM and inhibits IL-1β release in human whole blood, exhibiting an IC50 of 225 nM.

Apoptosisinducer 36 (Compound 42) exhibits anti-leukemic activity by reducing leukemia stem cells (LSC) and inducing differentiation. It inhibits proliferation of AML cells by causing cell cycle arrest in the G1 phase, and induces PANoptosis, which includes apoptosis, pyroptosis, and necrosis.

ICy-Q, a near-infrared (NIR) reagent activated by quinone oxidoreductase 1 (NQO-1), interacts with NQO-1 to yield the reduced product ICy-OH. This derivative selectively triggers pyroptosis and resultant death in pancreatic cancer cells. Moreover, ICy-Q serves as a valuable instrument for the expedited and precise diagnosis of intraoperative pathological sections [1].

4,4′-Secalonic acid D (Compound 12) is a PARP1 inhibitor. By inhibiting PARP1, 4,4′-Secalonic acid D induces the accumulation of ROS and DNA damage, activating the caspase-3 GSDME pathway, which leads to tumor cell apoptosis (apoptosis) and pyroptosis (pyroptosis). It exhibits antitumor activity.

1. Polyphyllin VI has hemostasis , expectorant , bacteriostasis, anticytotoxic, anti pregnancy kill sperm effects.

Morroniside would act as a regulator of hepatic inflammatory reactions and lipid metabolism in db db mice. It exhibits protective effects against diabetic renal damage and human umbilical vein endothelial cells, by inhibiting hyperglycemia and oxidative s

Nigericin is a polyether antibiotic with potent antimicrobial, antimalarial, anticoronaviral and anticancer activities. It is capable of promoting cellular potassium efflux, inducing Caspase-1 GSDMD and Caspase-3-mediated cellular pyroptosis and apoptosis in triple-negative breast cancer, and inducing apoptosis in PEL (primary exudative lymphoma) cells through mitochondrial dysfunction and Wnt β-catenin signaling downregulation.

LDC7559 inhibits gasdermin D (GSDMD) by blocking neutrophil extracellular trap (NET) at late stage.

Ac-YVAD-CMK (Ac-Tyr-Val-Ala-Asp-CMK) is a selective and irreversible inhibitor of Caspase-1 and inhibits pyroptosis, IL-1β and IL-18. Ac-YVAD-CMK shows neuroprotective and anti-inflammatory capacity.

1,7-Diphenyl-4-hepten-3-one is a compound isolated from Alpinia officinarum, which activates the Nrf2 pathway to suppress pyroptosis. It alleviates cognitive impairment and pathological damage in APP PS1 mice and prevents oxidative stress damage while reducing levels of pyroptosis-related proteins. 1,7-Diphenyl-4-hepten-3-one enhances Aβ-induced proliferation in HT22 cells and can be used in Alzheimer’s disease research.

CIB-1476, a caspase-1 inhibitor, effectively reduces joint swelling in mouse models of arthritis and demonstrates lasting anti-inflammatory effects. This compound achieves its benefits by blocking IL-1β production, NF-κB activation, and GSDMD-mediated pyroptosis, all of which are triggered by the NLRP3 inflammasome.

Apilimod 2HCl (STA 5326 2HCl) is a PIKFYVE kinase inhibitor that promotes NLRP3 inflammatory vesicle activation, IL-1β secretion, and cellular pyroptosis, and is used in the study of amyotrophic lateral sclerosis.

Ac-FEID-CMK TFA is a selective zebrafish GSDMEb-derived peptide inhibitor that reduces mortality and renal injury in infectious shock. It inhibits pyroptosis in vivo, attenuates septic AKI (acute kidney injury), and inhibits the caspy2-mediated atypical inflammatory vesicle pathway.

NLRP3-IN-55 (Compound 19) is an effective inhibitor of NLRP3, exhibiting an inhibitory concentration (IC50) of 0.34 μM. It targets the NLRP3 protein directly with a dissociation constant (KD) of 0.45 μM, effectively blocking the assembly and activation of the NLRP3 inflammasome. This action results in anti-inflammatory effects and inhibits cell pyroptosis.

Adrenalone hydrochloride (Adrenalone HCl) is a dopamine β-oxidase inhibitor with a similar structure to the norepinephrine transporter (NET) ligand, with an IC50 of 36.9 μM. It is an adrenergic agonist that acts as a local vasoconstrictor and hemostatic agent.

(E)-Necrosulfonamide ((E)-Necrosulfonamide) is an inhibitor of necroptosis. Blocks mixed lineage kinase domain-like protein (MLKL), a critical substrate of receptor-interacting serine-threonine kinase 3 (RIP3) during necrosis. Prevents MLKL-RIP1-RIP3 necrosome complex from interacting with downstream necrosis effectors. Binds and inhibits gasdermin D. Inhibits pyroptosis.

NLRP3-IN-9 (INF-4E) is an inhibitor of NLRP3 ATPase and caspase-1. NLRP3-IN-9 acts by irreversibly trapping thiol nucleophiles, which prevents both ATP- and nigericin-triggered pyroptosis of human THP-1 cells in a time- and concentration-dependent manner.

Talabostat (PT100, Val-boroPro) is a potent, nonselective and orally available dipeptidyl peptidase IV (DPP-IV) inhibitor with a Ki of 0.18 nM. Talabostat is a nonselective DPP-IV inhibitor, inhibiting DPP8 9, FAP, DPP2 and some other DASH family enzymes essentially as potently as it inhibits DPP-IV[1]. Talabostat stimulates the immune system by triggering a proinflammatory form of cell death in monocytes and macrophages known as pyroptosis. The inhibition of two serine proteases, DPP8 and DPP9, activates the proprotein form of caspase-1 independent of the inflammasome adaptor ASC[2]. Talabostat competitively inhibits the dipeptidyl peptidase (DPP) activity of FAP and CD26 DPP-IV, and there is a high-affinity interaction with the catalytic site due to the formation of a complex between Ser630 624 and the boron of talabostat[3]. Talabostat can stimulate immune responses against tumors involving both the innate and adaptive branches of the immune system. In WEHI 164 fibrosarcoma and EL4 and A20 2J lymphoma models, PT-100 causes regression and rejection of tumors. The antitumor effect appears to involve tumor-specific CTL and protective immunological memory. Talabostat treatment of WEHI 164-inoculated mice increases mRNA expression of cytokines and chemokines known to promote T-cell priming and chemoattraction of T cells and innate effector cells[3]. Talabostat treated mice show significant less fibrosis and FAP expression is reduced. Upon PT100 treatment, significant differences in the MMP-12, MIP-1α, and MCP-3 mRNA expression levels in the lungs are also observed. Treatment with PT100 in this murine model of pulmonary fibrosis has an anti-fibro-proliferative effect and increases macrophage activation[4]. [1]. Connolly BA, et al. Dipeptide boronic acid inhibitors of dipeptidyl peptidase IV: determinants of potencyand in vivo efficacy and safety. J Med Chem. 2008 Oct 9;51(19):6005-13. [2]. Okondo MC, et al. DPP8 and DPP9 inhibition induces pro-caspase-1-dependent monocyte and macrophage pyroptosis. Nat Chem Biol. 2017 Jan;13(1):46-53. [3]. Adams S, et al. PT-100, a small molecule dipeptidyl peptidase inhibitor, has potent antitumor effects and augments antibody-mediated cytotoxicity via a novel immune mechanism. Cancer Res. 2004 Aug 1;64(15):5471-80. [4]. Egger C, et al. Effects of the fibroblast activation protein inhibitor, PT100, in a murine model of pulmonary fibrosis. Eur J Pharmacol. 2017 Aug 15;809:64-72.

ZHSI-1 is an EV71 (Enterovirus 71) inhibitor that blocks EV71 CVA16 replication and virus-induced pyroptosis linked to viral pathogenesis. It effectively prevents EV71 infection in neonatal and young mice in animal models and can be used to study viral infections such as hand, foot, and mouth disease (HFMD) [1].

NLRP3-IN-21 (compound L38) is an inhibitor of the NLRP3 inflammasome with anti-inflammatory properties, suppressing inflammasome activation and pyroptosis by inhibiting gasdermin D cleavage, ASC oligomerization, and NLRP3 inflammasome assembly [1].