2. Signaling Pathways
  3. Epigenetics
    JAK/STAT Signaling
    Protein Tyrosine Kinase/RTK
    Stem Cell/Wnt
  4. JAK
  5. JAK Isoform

JAK

Janus kinases (JAKs) are receptor-associated tyrosine kinases that mediate signal transduction for type I and II cytokine receptors, regulating immune responses and hematopoiesis[1][2]. JAKs phosphorylate receptor cytoplasmic domains, activating downstream STAT transcription factors that control gene expression involved in inflammation, cell proliferation, and differentiation[1][3][4]. Among the four JAK isoforms (JAK1, JAK2, JAK3, TYK2), each exhibits distinct cytokine specificity and receptor pairing, influencing pathway selectivity and disease outcomes[1][5][6]. Dysregulated JAK-STAT signaling contributes to autoimmune disorders, hematologic malignancies, and inflammatory conditions such as rheumatoid arthritis, inflammatory bowel disease, and spondyloarthritis[2][3][7][8]. Mechanistically, TYK2 and JAK1 JH2 pseudokinase domains act as allosteric regulators, offering targets for isoform-selective inhibition[5][6]. Small-molecule JAK inhibitors, including tofacitinib, upadacitinib, and filgotinib, block cytokine-driven signaling by interfering with kinase activity or pseudokinase domain function, providing oral therapeutic options with defined isoform selectivity[9][10][11][12]. Experimental applications exploit JAK inhibitors to modulate B cell and T cell functions, study inflammatory pathways, and explore CNS and skeletal muscle pathophysiology, highlighting their utility in both preclinical and clinical research contexts[3][13][4]. Compared with broad inhibitors, next-generation allosteric and pseudokinase-targeting molecules reduce off-target effects while maintaining pathway-specific efficacy[12][6]. Collectively, JAK-targeted modulation represents a mechanistic strategy for precise intervention in cytokine-mediated diseases.

References:

JAK Related Products (285):

Cat. No. Product Name Effect Purity
  • HY-118119
    CAY10526
    		Inhibitor 99.12%
    CAY10526 is an inhibitor of Y-box binding protein 1 (YB-1) and microsomal prostaglandin E2 synthase 1 (mPGES1). CAY10526 inhibits the production of PGE2 by suppressing YB-1 and mPGES1. CAY10526 induces cell apoptosis (apoptosis) and inhibits the JAK/STAT, TGF-β/Smad3 and PI3K/AKT signaling pathways. CAY10526 can be used in research related to melanoma, prostate cancer, esophageal adenocarcinoma, T-cell lymphoma, etc.
  • HY-N1535
    Ponicidin
    		Inhibitor 99.93%
    Ponicidin (Rubescensine B) is an orally active RIPK1 inhibitor with a Kd value of 135 nM. Ponicidin inhibits the JAK2/STAT3 pathway to induce apoptosis, activates the PI3K/Akt pathway, upregulates SIRT1 expression, alleviates oxidative stress, suppresses inflammatory responses and necroptosis, and blocks cell cycle progression. Ponicidin induces ROS production to exert antiproliferative and antiviral effects, while also improving cognitive function and reducing Aβ plaque deposition. Ponicidin can be used in studies related to hepatocellular carcinoma, Alzheimer's disease, and gastric cancer.
  • HY-N0807
    Swertiamarin
    		Modulator 99.03%
    Swertiamarin is an orally active natural product with hypoglycemic, lipid-lowering, anti-rheumatic, and antioxidant activities. Swertiamarin can regulate the levels of pro-inflammatory cytokines, MMP, and NF-κB, and promote osteoblast proliferation. Swertiamarin has antioxidant and hepatoprotective effects against carbon tetrachloride induced rat liver toxicity through the Nrf2/HO-1 pathway. Swertiamarin can attenuate inflammatory mediators by regulating JAK2/STAT3 transcription factors in adjuvant induced arthritis rats. Swertiamarin can be used in the research of diabetes and arthritis.
  • HY-18303
    AMG-47a
    		Inhibitor 99.19%
    AMG-47a is an orally active, ATP-competitive Lck inhibitor (IC50=0.2 nM). AMG-47a inhibits VEGF2, p38α, p38α, Jak3, MLR, and IL-2 with IC50 of 1 nM, 3 nM, 72 nM, 30 nM, and 21 nM, respectively. AMG-47a reduces T cell activation and the production of cytokines such as TGF-β, exerting anti-inflammatory and anti-fibrotic activities. AMG-47a can be used in the research of autoimmune diseases, pulmonary fibrosis, and KRAS mutation-associated cancers[1][2][3].
  • HY-N0316
    Mollugin
    		99.79%
    Mollugin is an orally active and potent NF-κB inhibitor. Mollugin induces S-phase arrest of HepG2 cells, and increased intracellular reactive oxygen species (ROS) levels. Mollugin induces DNA damage in HepG2 cells, as well as an increase in the expression of p-H2AX. Mollugin shows anti-cancer effect by inhibiting TNF-α-induced NF-κB activation. Mollugin enhances the osteogenic action of BMP-2 (bone morphogenetic protein 2) via the p38-Smad signaling pathway.
  • HY-132819
    Ilunocitinib
    		Inhibitor 98.24%
    Ilunocitinib (compound 27) is a JAK inhibitor (extracted from patent WO2009114512A1).
  • HY-50856R
    Ruxolitinib (Standard)
    		Inhibitor
    Ruxolitinib (Standard) is the analytical standard of Ruxolitinib. This product is intended for research and analytical applications. Ruxolitinib (INCB18424) is a potent and selective JAK1/2 inhibitor with IC50s of 3.3 nM and 2.8 nM in cell-free assays, and has 130-fold selectivity for JAK1/2 over JAK3. Ruxolitinib induces autophagy and kills tumor cells through toxic mitophagy.
  • HY-161015
    JAK1-IN-13
    		Inhibitor 98.65%
    JAK1-IN-13 (compound 36b) is an orally active, potent and highly selective inhibitor of JAK1 with an IC50 of 0.044 nM. JAK1-IN-13 significantly decreases STAT3 phosphorylation.
  • HY-109148
    Izencitinib
    		Inhibitor 99.47%
    Izencitinib (TD-1473) is an orally active, non-selective and gut-restricted JAK inhibitor. Izencitinib (TD-1473) can be used in the study for ulcerative colitis.
  • HY-105174A
    BPC 157 acetate
    		Activator 99.78%
    BPC 157 acetate is an orally active peptide. BPC 157 acetate exhibits multiple activities such as promoting wound healing, tendon healing, neuroprotection, and gastrointestinal protection. BPC 157 acetate can be used in the research of tendon injury, burn, gastric ulcer, and neurological diseases.
  • HY-N6850
    Calenduloside E
    		Inhibitor 99.07%
    Calenduloside E is a pentacyclic triterpenoid saponin that can be extracted from the bark and roots of Aralia ovata, and has anti-inflammatory and anti-apoptotic activities. Calenduloside E alleviates atherosclerosis by regulating macrophage polarization, improves mitochondrial function by regulating the AMPK-SIRT3 pathway, and alleviates acute liver injury. In addition, Calenduloside E promotes the interaction between L-type calcium channels and Bcl-2 related apoptosis genes, inhibits calcium overload, and alleviates myocardial ischemia/reperfusion injury. Calenduloside E also improves non-alcoholic fatty liver disease by regulating heat shock-dependent pathways, and inhibits ROS mediated JAK1-STAT3 pathways to reduce cellular inflammatory responses.
  • HY-100544
    FLLL32
    		Inhibitor 99.78%
    FLLL32, a synthetic analog of curcumina, is a JAK2/STAT3 dual inhibitor with anti-tumor activity. FLLL32 can inhibit the induction of STAT3 phosphorylation by IFNα and IL-6 in breast cancer cells.
  • HY-152227
    PROTAC TYK2 degradation agent1
    		Degrader 99.50%
    PROTAC TYK2 degradation agent1 is a potent and subtype-selective TYK2 degrader. PROTAC TYK2 degradation agent1 has TYK2 degradation activity with DC50 value of 14 nM. PROTAC TYK2 degradation agent1 can be used for the research of autoimmune disease.
  • HY-13660
    Mocravimod hydrochloride
    		Activator 99.99%
    Mocravimod (hydrochloride) is an orally active sphingosine-1-phosphate receptor (S1PR) modulator that blocks the signal required by T cells to egress from lymph nodes and other lymphoid organs. Mocravimod (hydrochloride) preferentially binds to S1PR1 over S1PR2 and S1PR3 in cardiomyocytes. Mocravimod (hydrochloride) significantly lowered the concentration of reactive oxygen species (ROS), prevented mitochondrial permeability transition pore opening, boosted mitochondrial membrane potential (MMP), and increased phosphorylation of AKT, EKR, GSK-3β, JAK2, and STAT3. Mocravimod (hydrochloride) retains T cell effector function. Mocravimod (hydrochloride) can be used for the study of acute myelogenous leukemia, diabetes and Myocardial Ischemia-Reperfusion Injury (MIRI).
  • HY-19569R
    Upadacitinib (Standard)
    		Inhibitor
    Upadacitinib (Standard) is the analytical standard of Upadacitinib. This product is intended for research and analytical applications. Upadacitinib (ABT-494) is a potent, orally active and selective Janus kinase 1 (JAK1) inhibitor (IC50=43 nM). Upadacitinib (ABT-494) displays approximately 74 fold selective for JAK1 over JAK2 (200 nM) in cellular assays dependent on specific, relevant cytokines. Upadacitinib (ABT-494) can be used for several autoimmune disorders research.
  • HY-N0705
    Curculigoside
    		Inhibitor 99.82%
    Curculigoside is the main saponin in C. orchioide, exerts significant antioxidant, anti-osteoporosis, antidepressant and neuroprotection effects. Curculigoside possesses significant anti-arthritic effects in vivo and in vitro via regulation of the JAK/STAT/NF-κB signaling pathway.
  • HY-N0909
    Notoginsenoside R2
    		Inhibitor 99.80%
    Notoginsenoside R2 (20(S)-Notoginsenoside R2; Ginsenoside Ng-R2) is an orally active notoginsenoside. Notoginsenoside R2 activates P90RSK and Nrf2 via the MEK1/2-ERK1/2 pathway to inhibit 6-OHDA-induced apoptotic damage in nerve cells. Notoginsenoside R2 upregulates SOX8/β-catenin by reducing miR-27a, thereby suppressing Aβ25-35-induced neuronal apoptosis and inflammatory responses. Notoginsenoside R2 alleviates lipid accumulation and mitochondrial dysfunction in diabetic nephropathy by inhibiting c-Src. Notoginsenoside R2 alleviates hepatic fibrosis by inducing hepatic stellate cell senescence and inhibiting the inflammatory microenvironment via JAK/STAT3 suppression. Notoginsenoside R2 can be used in research related to Parkinson's disease, Alzheimer's disease, diabetic nephropathy and hepatic fibrosis.
  • HY-109178
    Ifidancitinib
    		Inhibitor 98.01%
    Ifidancitinib (ATI-50002) is an orally available, potent and selective inhibitor of JAK kinase 1/3 that disrupts γc cytokine signaling. Ifidancitinib is used in the research of allergy, asthma, and autoimmune diseases.
  • HY-N6069
    Raspberry ketone glucoside
    		Activator 99.52%
    Raspberry ketone glucoside is a melanogenesis inhibitor. Raspberry ketone glucoside inhibits melanogenesis by activating the IL6/JAK1/STAT3 pathway, inhibiting the transcriptional activity of MITFa, and its downstream expression levels of the TYR and TYRP1a genes. Raspberry ketone glucoside shows remarkable whitening activity on both B16F10 cells in vitro and zebrafish model in vivo.
  • HY-100538
    DTP3
    		Inhibitor 98.45%
    DTP3 TFA is a potent and selective GADD45β/MKK7 inhibitor. DTP3 TFA targets an essential, cancer-selective cell-survival module downstream of the NF-κB pathway.
Cat. No. Product Name / Synonyms Application Reactivity