NOD-like Receptor (NLR) Inhibitor

MCC950 (CP-456773; CRID3) is a potent and selective NLRP3 inhibitor with IC₅₀s of 7.5 and 8.1 nM in BMDMs and HMDMs, respectively.

Mito-TEMPO is a mitochondria-targeted antioxidant. Mito-TEMPO induces mitophagy by activating the PINK1/Parkin pathway, inhibits NLRP3 inflammasome activation, restores mitochondrial membrane potential, and improves renal function and podocyte injury. Mito-TEMPO regulates Ca²⁺ homeostasis, inhibits Bnip3 overexpression, shortens action potential duration, and exerts antiarrhythmic effects. Mito-TEMPO reverses premature senescence, reduces trabecular bone loss, and decreases cell apoptosis. Mito-TEMPO can be used in studies of chronic kidney disease, age-related cardiac dysfunction, postmenopausal osteoporosis, and ischemic stroke.

Citraconic acid (Methylmaleic acid) is an orally active inhibitor targeting the NLRP3 inflammasome and Keap1-Nrf2 pathway. Citraconic acid reduces reactive oxygen species (ROS) generation by inhibiting succinate dehydrogenase (SDH) activity. Citraconic acid also modifies the conformation of Keap1 protein, relieves its inhibition of Nrf2, promotes antioxidant gene expression, and inhibits NLRP3 activation and the release of pro-inflammatory factors such as IL-1β and IL-18. Citraconic acid has anti-inflammatory and antioxidant activities, can reduce oxidative stress and cell pyroptosis, improve tissue damage, and can be used for the research of inflammation-related diseases such as acute renal ischemia-reperfusion injury. Citraconic acid is an isomer of Itaconic acid (HY-Y052).

Teneligliptin (MP-513) hydrobromide is an orally active and selective dipeptidyl peptidase 4 (DPP-4) inhibitor (IC₅₀s: 0.37 and 0.29 nM for the human and rat DPP-4, respectively). Teneligliptin hydrobromide improves blood glucose levels and can be used in researches related to type 2 diabetes mellitus.

Colchicine, an orally active alkaloid, is a potent tubulin inhibitor and a microtubule disrupting agent. Colchicine inhibits microtubule polymerization with an IC₅₀ of 3 nM. Colchicine is also a competitive antagonist of the α3 glycine receptors (GlyRs). Colchicine prevents non-steroidal anti-inflammatory drug (NSAID)-induced small intestinal injury by inhibiting activation of the NLRP3 inflammasome. Colchicine has extensive anti-inflammatory, immunosuppressive and strong anti-fibrosis effects and has the potential for gouty arthritis research.

MCC950 sodium (CP-456773 sodium; CRID3 sodium salt) is a potent, selective NLRP3 inhibitor with IC₅₀s of 7.5 and 8.1 nM in BMDMs and HMDMs, respectively.

Necrosulfonamide is a MLKL and Gasdermin D (GSDMD) inhibitor, capable of separately inhibiting necroptosis and pyroptosis of cells. Necrosulfonamide does not affect the activation of upstream signals, but specifically inhibits the downstream executor oligomerization step. Necrosulfonamide reduces the expression of the key kinases NLRP3 and caspase-1 involved in necroptosis and pyroptosis, activate the Nrf2 pathway and the downstream antioxidant enzymes, and also downregulates a variety of inflammatory factors. Necrosulfonamide plays significant roles in various diseases such as neurodegenerative diseases (such as Parkinson’s disease), tissue damage and ischemia-reperfusion injury, inflammatory bowel disease, osteoarthritis and fracture repair, and hair loss by regulating two important programmed necrosis pathways.

ANA-12 is a brain-penetrant, selective TrkB antagonist with IC₅₀ values of 45.6 nM and 41.1 μM, and K_d values of 10 nM and 12 μM, for high- and low-affinity sites, respectively. ANA-12 specifically inhibits BDNF-induced TrkB receptor activation and its downstream signaling cascades by directly and non-competitively binding to the TrkB receptor, without affecting the functions of TrkA and TrkC. ANA-12 is used in research concerning neuropsychiatric disorders (such as depression and anxiety), acute and chronic pain, neuroimmune inflammation, and the mechanisms of learning and memory.

Aluminum Hydroxide is an orally active main form of aluminum used as adjuvant. Aluminum hydroxide-based adjuvant researches include the repository effect, pro-phagocytic effect, and activation of the pro-inflammatory NLRP3 pathway. Aluminum Hydroxide also acts as adjuvant to compensate low inherent immunogenicity of subunit vaccines.

GSK717 is a potent, selective NOD2 (nucleotide-binding oligomerization domain 2) inhibitor. GSK717 inhibits muramyl dipeptide (MDP)-induced NOD2-mediated signaling, with an IC₅₀ of 400 nM for MDP-stimulated IL-8 secretion in HEK293/hNOD2 cells.

Inclisiran sodium is a double-stranded small interfering RNA (siRNA) molecule. Inclisiran sodium inhibits the transcription of PCSK9. Inclisiran sodium inhibits Pyroptosis, activates PPARγ, and reduces NLRP3, cleaved caspase-1, IL-1β, and IL-18. Inclisiran sodium has anti-inflammatory, lipid-regulating and anti-atherosclerotic activities. Inclisiran sodium can be used in researches of hyperlipidemia and cardiovascular disease (CVD).

NLRP3/AIM2-IN-3 (compound 59) is a potent inhibitor with differential species specific effects against NLRP3 and AIM2 inflammasome-dependent pyroptosis. NLRP3/AIM2-IN-3 shows inhibitory efficacy against pyroptosis in THP-1 macrophages stimulated with LPS/nigericin, with an IC₅₀ of 0.077 ± 0.008 μM. NLRP3/AIM2-IN-3 disturbs the interaction of NLRP3 or AIM2 with the adaptor protein ASC and inhibited ASC oligomerization.

Inclisiran is a double-stranded small interfering RNA (siRNA) molecule. Inclisiran inhibits the transcription of PCSK9. Inclisiran inhibits Pyroptosis, activates PPARγ, and reduces NLRP3, cleaved caspase-1, IL-1β, and IL-18. Inclisiran has anti-inflammatory, lipid-regulating and anti-atherosclerotic activities. Inclisiran can be used in researches of hyperlipidemia and cardiovascular disease (CVD).

CY-09 is a selective and direct NLRP3 inhibitor. CY-09 directly binds to the ATP-binding motif of NLRP3 NACHT domain and inhibits NLRP3 ATPase activity, resulting in the suppression of NLRP3 inflammasome assembly and activation.

Dapansutrile is a potent, orally active and selective NLRP3 inflammasome inhibitor. Dapansutrile has anti-inflammatory activity and decreases immune factor levels. Dapansutrile can be used for research of inflammatory diseases.

EMD638683 is an orally active SGK1 inhibitor with an IC₅₀ of 3 μM. EMD638683 exhibits strong inhibition against SGK1, moderate inhibition against SGK2 and SGK3, and shows excellent selectivity for other AGC kinase family members. EMD638683 has antihypertensive activity by inhibiting SGK1, and independently of the blood pressure-lowering effect, it effectively prevents heart inflammation and fibrosis caused by hypertension by inhibiting the cardiac NLRP3 inflammation body/ IL-1β axis. EMD638683 promotes apoptosis of colon cancer cells and sensitizes radiotherapy. EMD638683 (S-Form) can be used in research related to hypertension, hypertensive heart damage, and colon cancer.

Alirocumab is an anti-PCSK9 human monoclonal antibody. Alirocumab inhibits PCSK9. Alirocumab reduces NLRP3 inflammasome, regulates Nrf2/HO-1, HMGB1/NF-κB and Fractalkine/CX3CR1. Alirocumab increases the ability of the liver to bind LDL-cholesterol (LDL-C) and reduces levels of LDL-C in blood. Alirocumab improves atherosclerosis and inflammation.

Stavudine (d4T) is an orally active nucleoside reverse transcriptase inhibitor (NRTI). Stavudine has activity against HIV-1 and HIV-2. Stavudine also inhibits the replication of mitochondrial DNA (mtDNA). Stavudine reduces NLRP3 inflammasome activation and modulates Amyloid-β autophagy. Stavudine induces apoptosis.

ATN-161 is an antagonist of α5β1 integrin and αvβ3 integrin, as well as an inhibitor of fibrosis, an inhibitor of oxidative stress, a tight junction stabilizer, a mitochondrial integrity protector, an angiogenesis inhibitor and an antiviral agent. ATN-161 inhibits NLRP3, MAPK, and ROS. ATN-161 protects mice from SARS-CoV-2 infection. ATN-161 reduces infarct volume, alleviates edema, decreases immune cell infiltration, reduces the area of choroidal neovascularization lesions, lowers tumor microvessel density and viral load. ATN-161 can be used in research related to ischemic stroke, choroidal neovascularization, breast cancer, coronavirus disease 2019 (COVID-19), and liver metastasis of colorectal cancer.

Troxerutin, also known as vitamin P4, is a tri-hydroxyethylated derivative of natural bioflavonoid rutins which can inhibit the production of reactive oxygen species (ROS) and depress ER stress-mediated NOD activation.