inflammasome activation

hydrocotarnine is an inhibitor of Cbl.

Nigericin sodium salt is an antibiotic, an NLRP3 activator, and a cationic ion carrier. Nigericin sodium triggers the activation of the NALP3 inflammasome, which inhibits Golgi function and suppresses the growth of Gram-positive bacteria.

MCC950 (CP-456773) is a NLRP3 inflammasome inhibitor (IC50=7.5-8.1 nM). MCC950 can be used to treat inflammatory diseases, inflammation-related tumors and neurodegenerative diseases.

Trimethylamine N-oxide (TMAO) is a gut microbiota-dependent metabolite derived from dietary choline, betaine, and carnitine. It induces inflammation by activating the ROS/NLRP3 inflammasome and promotes fibroblast differentiation through the activation of the TGF-β/Smad2 signaling pathway. TMAO is commonly used to induce cardiac fibrosis models.

NLRP3/AIM2-IN-3 is a unique molecule that inhibits NLRP3 and AIM2 inflammasome activation in a species-specific manner. It has an IC50 value for cell lysis of 0.077 ± 0.008 μ M. NLRP3/AIM2-IN-3 is a potent inhibitor of NLRP3 and AIM2 inflammasome-dependent cell lysis with an IC50 value for cell lysis of 0.077 ± 0.008 μ M. NLRP3/AIM2-IN-3 inhibits LPS/nigericin NLRP3/AIM2-IN-3 inhibits LPS/nigericin-stimulated cell lysis in THP-1 macrophages with an IC50 value of 0.077 ± 0.008 μM. NLRP3/AIM2-IN-3 interferes with the interaction of NLRP3 or AIM2 with the bridging protein ASC, inhibiting oligomerization of ASC.

NLRP3-IN-NBC6 is a potent, selective NLRP3 inflammasome inhibitor with an IC50 of 574 nM. It acts independently of Ca 2+ and inhibits Nigericin-induced inflammasome activation in THP-1 cells, as well as Imiquimod-induced IL-1β release from LPS-primed bone marrow-derived macrophages (BMDMs) [1].

Colchicine is an orally active natural alkaloid that acts by inhibiting microtubule polymerization (IC50 = 3 nM) and as a competitive antagonist of the α3 glycine receptor. It possesses broad anti-inflammatory, immunosuppressive, and antifibrotic activities, can inhibit NLRP3 inflammasome activation to prevent NSAID-induced small intestine injury, holds potential for gouty arthritis and rheumatoid arthritis research, and is commonly used to establish Alzheimer’s disease models.

BAA473, a bile acid analog, is a potent activator of the pyrin inflammasome, inducing secretion of interleukin-18 (IL-18) through inflammasome activation in both myeloid and intestinal epithelial cells [1].

NLRP3-IN-45 (D6) serves as an inhibitor specifically targeting the NLRP3 inflammasome, demonstrated through its ability to curb the activity of IL-1β (IC 50 = 41.79 nM). It effectively prevents the activation of the NLRP3 inflammasome while sparing the initial stages of its activation process. Furthermore, NLRP3-IN-45 has been shown to selectively inhibit NLRP3 inflammasome activation in the LPS-induced acute lung injury (ALI) mouse model.

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.

Oxidized low density lipoprotein (Human) (Human ox-LDL) is the oxidized form of human low-density lipoprotein (LDL), used to study lipid transport and atherosclerosis. Human ox-LDL stimulates endothelial cell activation and adhesion molecule production, inhibits eNOS activity and NO generation, and activates NLRP3 inflammasomes in macrophages.

NLRP3-IN-48 is an inhibitor of NLRP3. It suppresses the activation of the NLRP3 inflammasome by targeting the NLRP3 protein, thereby interfering with the assembly of the NLRP3 inflammasome. Additionally, NLRP3-IN-48 exhibits anti-inflammatory activity in a DSS-induced acute colitis model in mice.

NLRP3-IN-49 (compound Z48) is a potent and specific inhibitor of NLRP3, displaying IC50 values of 0.26 μM in THP-1 cells and 0.21 μM in mouse bone marrow-derived macrophages. It directly binds to the NLRP3 protein with a dissociation constant (Kd) of 1.05 μM, effectively preventing the assembly and activation of the NLRP3 inflammasome, thereby exhibiting anti-inflammatory properties. NLRP3-IN-49 is utilized in the research of inflammatory bowel disease.

NLRP3-IN-46 (Compound 3k) activates the cholinergic anti-inflammatory pathway involved in neuro-immune modulation, thereby inhibiting the activation of the NLRP3 inflammasome. Furthermore, NLRP3-IN-46 suppresses the production of IL-1β in THP-1 cells induced by Uric acid sodium, making it relevant for research in gouty arthritis.

NLRP3-IN-58 (Compound DS15) acts as an inhibitor of NLRP3 inflammasome activation, with an IC50 value of 3.85 μM, and is capable of inhibiting 33% of IL-1β release at a concentration of 10 μM.

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.

Ofirnoflastum (Ofirnoflast) is a selective serine/threonine-protein kinase Nek7 inhibitor that exerts potent anti-inflammatory effects by suppressing Nek7-dependent NLRP3 inflammasome activation, reducing caspase-1 cleavage, IL-1β and IL-18 secretion, and pyroptotic cell death in vitro, while significantly attenuating cytokine production and tissue injury in animal models of acute and chronic inflammation, supporting its therapeutic potential in autoimmune and inflammatory diseases.

AChE/BChE-IN-23 (Compound 6e) is a dual inhibitor of acetylcholinesterase and butyrylcholinesterase, exhibiting IC50 values of 0.91 μM for AChE, 1.19 μM for eqBChE, and 1.01 μM for hBChE. This compound also demonstrates antioxidant properties and inhibits the aggregation of Aβ1-42 and Tau proteins. Moreover, AChE/BChE-IN-23 prevents the activation of microglial cells by inhibiting the release of reactive oxygen species and mitochondrial damage. Additionally, it reduces the levels of the NLRP3 inflammasome in human microglial cells and reverses memory impairment in mice induced by scopolamine.

Kanglexin is an orally active novel anthraquinone compound. It inhibits NLRP3 inflammasome activation and pyroptosis, offering cardioprotective benefits. By stimulating the FGFR1/ERK signaling pathway, Kanglexin promotes angiogenesis and accelerates wound healing in diabetes. Additionally, it has lipid-lowering effects and inhibits vascular smooth muscle cell dedifferentiation, making it a potential compound for studying hyperlipidemia, fatty liver, and atherosclerosis.

P2X4 antagonist-4 (compound 64) is a potent P2X4R antagonist with an IC50 value of 8 µM. It can inhibit ATP-induced activation of the NLRP3 inflammasome and the subsequent release of IL-1β.

NLRP3-IN-68 (Compound 2d) is a derivative of 1,3,4-oxadiazole. It exhibits significant anti-inflammatory and antioxidant properties, effectively inhibiting the secretion of inflammatory cytokines, the expression of iNOS, and the activation of the NLRP3 inflammasome. NLRP3-IN-68 is applicable in the research of anti-inflammatory drugs.

NLRP3-IN-69 (Compound 23) inhibits the activation of NF-κBp65 and the formation of the NLRP3 inflammasome. It suppresses the overexpression of IL-1β, iNOS, and COX-2 induced by LPS, and inhibits the production of NO (IC50=5.66 μM), thereby demonstrating anti-inflammatory activity.

NK7-902 is a CRBN molecular glue degrader of NEK7. It fully degrades NEK7 in human primary monocytes and whole blood, yet only partially inhibits NLRP3-dependent IL-1β production. NK7-902 results in profound and lasting degradation of NEK7, but only temporarily blocks NLRP3 inflammasome activation in non-human primates via oral administration. The compound demonstrates activity in mouse systems.

NLRP3-IN-76 is an orally active NLRP3 inhibitor that suppresses the production of NO and reduces the mRNA levels of pro-inflammatory cytokines (iNOS, IL-6, IL-1β, and TNFα). It exerts anti-inflammatory effects by inhibiting the activation of the NLRP3 inflammasome and the NF-κB signaling pathway. Furthermore, NLRP3-IN-76 can ameliorate DSS-induced colitis and is applicable for studying inflammatory bowel disease (IBD).