STAT3 Inhibitor

Desmethoxyyangonin is one of the six major kavalactones found in the Piper methysticum (kava) plant. Desmethoxyyangonin is a selective inhibitor of monoamine oxidase-B (MAO-B) (IC₅₀: 0.123  µM). Desmethoxyyangonin exerts anti-inflammatory effects by inhibiting Jak2/STAT3 and IKK signaling pathways. Desmethoxyyangonin induces CYP3A23 expression and leads to skeletal muscle relaxation.

Carabrone is a sesquiterpene found in the fruits of Carpesium abrotanoides and acts as a STAT3 inhibitor (K_d = 25.23 nM) with antibacterial, antitumor, and orally active properties. Carabrone covalently binds to UBE2D3 via Cys85 (K_d = 3.85 μM) and inhibits IκBα phosphorylation and NF-κB signaling. Carabrone induces ROS accumulation, loss of mitochondrial membrane potential, DNA fragmentation, and metacaspase-1-mediated apoptosis in fungi. Carabrone ameliorates autoimmune encephalomyelitis and MASH in vivo, reduces pro-inflammatory cytokines without immunotoxicity. Carabrone is used in research related to autoimmune encephalomyelitis, steatohepatitis, and fungal infections.

Graveoline (Rutamine) is an orally active alkaloid with various activities such as antifungal, antiparasitic, anti-inflammatory, and antitumor effects. Graveoline can induce tumor cell apoptosis and autophagy through a reactive oxygen species-mediated pathway. Graveoline has an MIC of 500 μg/mL for Candida albicans. Graveoline can be used in the research of various diseases such as tumors and liver injury.

WB436B is a highly selective STAT3 inhibitor. WB436B can selectively inhibit STAT3-Tyr705 phosphorylation and the expression of STAT3 target genes, showing cytotoxic effects on pancreatic cancer cells and inducing apoptosis. WB436B can suppress tumor growth and metastasis in pancreatic cancer mouse models, extending the survival of tumor-bearing mice.

Cyanidin 3,5-diglucoside chloride is an anthocyanin. Cyanidin 3,5-diglucoside chloride inhibits inflammatory cytokines (IL-1α, IL-1β, and IL-6) expression and NO production. Cyanidin 3,5-diglucoside chloride inhibits the phosphorylation of STAT3, IκB, ERK, p38, and AKT. Cyanidin 3,5-diglucoside chloride inhibits high pressure-induced decrease in GLAST. Cyanidin 3,5-diglucoside chloride exerts anti-inflammatory and skin barrier modulating effects. Cyanidin 3,5-diglucoside chloride can be used in retinal research.

Triacetylresveratrol, an acetylated analog of Resveratrol. Triacetylresveratrol decreases the phosphorylation of STAT3 and NF-κB in a dose- and time- dependent manner in PANC-1 and BxPC-3 cells. Anticancer effects.

Balsalazide is a prodrug of amino salicylic acid that releases mesalamine (HY-15027) in the colon, offering various anti-inflammatory effects in areas of colitis, and it also exerts related anticancer effects by regulating the IL-6/STAT3 pathway.

HJC0416 hydrochloride is a potent and orally active STAT3 inhibitor with an enhanced anticancer profile than Stattic (HY-13818). HJC0416 hydrochloride is a promising anti-cancer agent for breast cancer study.

Ochromycinone ((Rac)-STA-21) is a natural antibiotic and a STAT3 inhibitor. Ochromycinone can inhibits STAT3 DNA binding activity, STAT3 dimerization. Ochromycinone has anticancer and antimicrobial activity.

Golotimod hydrochloride (SCV 07 hydrochloride), an immunomodulating peptide with antimicrobial activity, significantly increases the efficacy of antituberculosis therapy, stimulates thymic and splenic cell proliferation, and improves macrophage function. Golotimod hydrochloride (SCV 07 hydrochloride) inhibits STAT3 signaling and modulates the duration and severity of oral mucositis in animal models that received radiation or a combination of radiation and Cisplatin. Golotimod hydrochloride (SCV 07 hydrochloride) is also a potential therapeutic for recurrent genital herpes simplex virus type 2 (HSV-2).

QL-1200186 is a selective, orally active, allosteric inhibitor targeting the tyrosine kinase TYK2 pseudokinase domain JH2 (IC₅₀=0.06 nM, TYK2 JH2), with 164-fold selectivity over TYK1 JH2 (IC₅₀=9.85 nM，TYK1 JH2). QL-1200186 first stabilizes the TYK2 JH2 conformation, inhibits the activity of the JH1 catalytic domain, and blocks the IFNα, IL-12/IL-23-mediated JAK-STAT signaling pathway. QL-1200186 can inhibit the production of Th1/Th17 cell-related cytokines (such as IFNγ, IL-23), reduce immune cell activation, and has no significant effect on JAK1/2/3 kinase activity. QL-1200186 can significantly improve skin inflammation in the Imiquimod (HY-B0180)-induced psoriasis mouse model and reduce the Psoriasis Area and Severity Index (PASI) score. QL-1200186 can be used in the study of autoimmune diseases such as psoriasis and systemic lupus erythematosus (SLE).

MS4077 is an ALK PROTAC degrader with a DC₅₀ of 3 nM in SU-DHL-1 cells, a DC₅₀ of 34 nM in NCI-H2228 cells, and a K_d of 37 nM. MS4077 induces the degradation of oncogenic active ALK fusion proteins via a cereblon- and proteasome-dependent pathway, and inhibits the phosphorylation of ALK and STAT3, thereby suppressing cancer cell proliferation. MS4077 is used for the research of anaplastic large cell lymphoma and non-small cell lung cancer.

Vanicoside B is a phenylpropanoyl sucrose derivative, can be isolated from the herb Persicaria dissitiflora. Vanicoside B targets cyclin-dependent kinase 8 (CDK8) and exhibits anti-tumor activity. The potential mechanism is Vanicoside B blocks CDK8-mediated signaling pathways and decreases the expression of epithelial-mesenchymal transition proteins, so that it leads to cell cycle arrest and apoptosis.

Iminostilbene is a chemical precursor of carbamazepine. Additionally, Iminostilbene is an orally active inhibitor of PKM2 (Pyruvate Kinase M2) and COX2 (Cyclooxygenase-2). Iminostilbene exerts its effects by inhibiting PKM2 and its interaction with HIF-1α and STAT3, reducing COX2 and iNOS expression, and decreasing LPS-induced release of IL-1β, IL-6, TNF-α, and MCP-1, thereby suppressing macrophage-mediated inflammatory responses and improving myocardial ischemia/reperfusion (MI/R) injury. Iminostilbene holds promise for research in inflammation regulation, cardiovascular diseases (such as MI/R injury), and macrophage-mediated immune-related diseases.

Balsalazide sodium hydrate is a prodrug of amino salicylic acid that releases mesalamine (HY-15027) in the colon, offering various anti-inflammatory effects in areas of colitis, and it also exerts related anticancer effects by regulating the IL-6/STAT3 pathway.

Tofacitinib-¹³C₃ (Tasocitinib-¹³C₃; CP-690550-¹³C₃) is the ¹³C-labeled Tofacitinib (HY-40354). Tofacitinib (Tasocitinib) is an orally active, blood-brain barrier permeable selective inhibitor of JAK1/JAK3. Tofacitinib blocks the JAK-STAT/NF-κB signaling pathway, inhibits cytokine signal transduction, phosphorylation of STAT1/STAT5, and suppresses innate and adaptive immune responses. Tofacitinib can be used in research related to major depressive disorder, rheumatoid arthritis, pulmonary diseases, systemic lupus erythematosus, and immune-mediated liver injury.

STAT3-IN-15 is a potent and orally active STAT3 inhibitor against idiopathic pulmonary fibrosis (IPF). STAT3-IN-15 inhibits STAT3 phosphorylation. STAT3-IN-15 also inhibits the migration and deformation of epithelial cells induced by TGF-β1 and inhibit epithelial-mesenchymal transition (EMT).

Ritlecitinib (PF-06651600) tosylate is a highly selective, orally active, irreversible covalent JAK3 inhibitor (IC₅₀=33 nM) without inhibitory activity towards JAK1, JAK2, and TYK2 (IC₅₀ >10 μ M). Ritlecitinib tosylate rapidly inactivates the JAK3 kinase, and blocks signaling and downstream STAT phosphorylation mediated by common gamma chain cytokines such as IL-2 and IL-15. Ritlecitinib tosylate can inhibit Th1/Th17 cell differentiation and function, and effectively suppress preclinical animal models such as alopecia areata, adjuvant-induced arthritis (AIA), and experimental autoimmune encephalomyelitis (EAE).

Mulberrofuran G is a NOX inhibitor (IC₅₀: 6.9 μM) and tyrosinase inhibitor. Mulberrofuran G exhibits anti-inflammatory, antioxidant, antiviral, antitumor, and neuroprotective effects. Mulberrofuran G can be used in the research of tumors, nervous system diseases, and other conditions.

OK2, a specific inhibitor of the CCN2/EGFR interaction, efficiently blocks CCN2/EGFR interaction through binding to the CT domain of CCN2. OK2 can be used for kidney fibrosis and chronic kidney disease research.