JAK3
Janus kinase 3 (JAK3) is a non-receptor tyrosine kinase of the JAK family that mediates cytokine receptor signaling and transduces extracellular immune signals through the JAK/STAT signaling pathway[1]. JAK3 functions downstream of cytokine receptors and participates in receptor-associated signaling events that regulate immune cell development, activation, and homeostasis through STAT phosphorylation and transcriptional regulation[1][2]. Mechanistically, cytokine-induced receptor dimerization activates JAK proteins, leading to receptor phosphorylation, STAT recruitment, STAT activation, and subsequent regulation of target gene expression involved in immunity and inflammatory responses[2][3]. In disease contexts, dysregulated JAK/STAT signaling is associated with immune-mediated disorders and inflammatory diseases, making JAK family members important therapeutic targets for pathway modulation[2][3]. Compared with the broadly expressed isoforms JAK1, JAK2, and TYK2, JAK3 exhibits a more restricted expression pattern and is primarily produced in hematopoietic and lymphoid cells, providing a key biological distinction among JAK family members[2][3]. This lineage-associated distribution links JAK3 more closely to adaptive immune regulation and supports its relevance in immune system research models[3]. For experimental applications, JAK3 has attracted substantial interest as a drug target because selective inhibition of cytokine-triggered JAK/STAT signaling can modulate immune responses while exploiting the relatively restricted cellular distribution of this isoform[3][4]. Consequently, the development of selective JAK3 inhibitors continues to provide valuable tools for investigating cytokine signaling mechanisms and immune-related disease biology[3][4].
References:
- [1]. Kawamura M, et al. Molecular cloning of L-JAK, a Janus family protein-tyrosine kinase expressed in natural killer cells and activated leukocytes. Proc Natl Acad Sci U S A. 1994 Jul 5;91(14):6374-8. [Content Brief]
- [2]. Hu X, et al. The JAK/STAT signaling pathway: from bench to clinic. Signal Transduct Target Ther. 2021 Nov 26;6(1):402. [Content Brief]
- [3]. Kwon S. Molecular dissection of Janus kinases as drug targets for inflammatory diseases. Front Immunol. 2022 Dec 8;13:1075192. doi: 10.3389/fimmu.2022.1075192. PMID: 36569926; PMCID: PMC9773558. et al. Molecular dissection of Janus kinases as drug targets for inflammatory diseases. Front Immunol. 2022 Dec 8;13:1075192. [Content Brief]
- [4]. Chen C, et al. A highly selective JAK3 inhibitor is developed for treating rheumatoid arthritis by suppressing γc cytokine-related JAK-STAT signal. Sci Adv. 2022 Aug 19;8(33):eabo4363. [Content Brief]
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JAK3 Related Products (158)
Related Products (158)
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Dual Cathepsin L/JAK-IN-1
0 ImagesDual Cathepsin L/JAK-IN-1 (Compound A8) is a dual inhibitor of Cathepsin L (CTSL) and JAK, with IC50 values of 0.68 μM, 337.1 nM, 5.251 nM, 27.29 nM, and 172.6 nM for CTSL, JAK1/2/3, and TYK2, respectively. Dual Cathepsin L/JAK-IN-1 effectively blocks the activation of the MAPK, NF-κB, and JAK/STAT signaling pathways, leading to significant anti-inflammatory therapeutic effects. Dual Cathepsin L/JAK-IN-1 can be used in research on acute lung injury (ALI).
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Ruxolitinib sulfate
0 ImagesCat. No.: HY-50859CAS No.: 1092939-16-6Synonyms: INCB018424 sulfateRuxolitinib sulfate (INCB018424 sulfate) is the first potent, selective JAK1/2 inhibitor to enter the clinic with IC50s of 3.3 nM/2.8 nM, and has > 130-fold selectivity for JAK1/2 versus JAK3.
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Upadacitinib tartrate tetrahydrate
0 ImagesCat. No.: HY-19569ACAS No.: 1607431-21-9Synonyms: ABT-494 tartrate tetrahydrateUpadacitinib (ABT-494) tartrate tetrahydrate is a potent, orally active and selective Janus kinase 1 (JAK1) inhibitor (IC50=43 nM). Upadacitinib tartrate tetrahydrate displays approximately 74 fold selective for JAK1 over JAK2 (200 nM) in cellular assays dependent on specific, relevant cytokines. Upadacitinib tartrate tetrahydrate can be used for several autoimmune disorders research.
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Ritlecitinib malonate
0 ImagesCat. No.: HY-100754ACAS No.: 2140301-97-7Synonyms: PF-06651600 malonateRitlecitinib (PF-06651600) malonate 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 malonate 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 malonate 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).
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JAK3 covalent inhibitor-1
0 ImagesCat. No.: HY-119935CAS No.: 2300106-50-5JAK3 covalent inhibitor-1 is a potent and selective janus kinase 3 (JAK3) covalent inhibitor with an IC50 of 11 nM and shows 246-fold selectivity vs other JAKs.
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AT9283 lactic acid
0 ImagesCat. No.: HY-10058CAS No.: 896466-76-5
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Pacritinib hydrochloride
0 ImagesCat. No.: HY-16379ACAS No.: 1228923-43-0Synonyms: SB1518 hydrochloridePacritinib hydrochloride is a potent inhibitor of both wild-type JAK2 (IC50=23 nM) and JAK2V617F mutant (IC50=19 nM). Pacritinib hydrochloride also inhibits FLT3 (IC50=22 nM) and its mutant FLT3D835Y (IC50=6 nM). Pacritinib hydrochloride can be used for the research of acute myeloid leukemia (AML) and myelofibrosis (MF).
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WYE-151650
0 ImagesCat. No.: HY-120457CAS No.: 1141855-86-8WYE-151650 is a selective JAK-3 inhibitor. WYE-151650 suppresses IL-2-induced STAT-5 phosphorylation and cell proliferation mediated by JAK-3. WYE-151650 is promising for research of autoimmune diseases.
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NUAK1-IN-3
0 ImagesCat. No.: HY-182361CAS No.: 3097515-05-1NUAK1-IN-3 is a potent and selective NUAK1 inhibitor with an IC50 of 0.49 nM. NUAK1-IN-3 also inhibits NUAK2 and JAK3 with IC50 values of 265 and 225 nM. NUAK1-IN-3 engages Glu139 of NUAK1, forms a salt bridge between its bicyclic ring nitrogen and Asp142, and uses a fluorine atom to enhance hydrophobic binding interactions. NUAK1-IN-3 attenuates MYPT1 phosphorylation, suppresses the NUAK1-MYPT1 signaling axis, and inhibits proliferation, migration, and invasion of triple-negative breast cancer cells. NUAK1-IN-3 reverses TGF-β1-induced epithelial-mesenchymal transition (EMT) marker alterations, downregulates Snail and N-cadherin, and upregulates E-cadherin in tumor tissues. NUAK1-IN-3 suppresses tumor growth in triple-negative breast cancer xenograft models. NUAK1-IN-3 can be used for the research of triple-negative breast cancer.
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JAK-2/3-IN-3
0 ImagesCat. No.: HY-151285CAS No.: 2242031-31-6JAK-2-/3-IN-3 (compound ST4j) is a potent JAK2/3 inhibitor with IC50s of 13.00 and 14.86 nM for JAK2 and JAK3, respectively. JAK-2-/3-IN-3 inhibits autophosphorylation of JAK2 and induces apoptosis in a dose- and time-dependent manner. JAK-2-/3-IN-3 can be used in studies of lymph derived diseases and leukemia.
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JAK-2/3-IN-1
0 ImagesCat. No.: HY-10652CAS No.: 1036241-36-7JAK-2/3-IN-1 is a potent JAK-2 and JAK-3 inhibitor extracted from patent US8163732B2, compound 46, has Kis of <250 nM for both isoforms.
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JAK-IN-30
0 ImagesCat. No.: HY-154994CAS No.: 2891469-99-9
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FAK-IN-22
0 ImagesCat. No.: HY-168718CAS No.: 2703920-02-7FAK-IN-22 (Compound 26) is an inhibitor of FAK, JAK3, and Aurora B, with IC50 values of 50.94 nM, 9.99 nM, and 0.49 nM, respectively, effectively inhibiting tumor occurrence and metastasis in pancreatic ductal adenocarcinoma (PDAC). FAK-IN-22 effectively inhibits the proliferation of PANC-1 cells, with an IC50 value of 0.15 μM. FAK-IN-22 induces apoptosis and G2/M phase arrest in PANC-1 cells by inhibiting the FAK/PI3K/Akt signaling pathway.
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EGFR-IN-178
0 ImagesCat. No.: HY-178448EGFR-IN-178 is an orally active EGFR mutant inhibitor, exhibits highly selective inhibitory activity against mutants of the EGFR enzyme, including Del19 (IC50 = 3.4 nM), L858R/T790 M (IC50 = 2.9 nM), and Del19/T790 M (IC50 = 2.5 nM). EGFR-IN-178 has good activity against JAK2 (IC50 = 55.6 nM) and JAK3 (IC50 = 46.1 nM) kinases. EGFR-IN-178 can increase cellular lipid oxide MDA, meanwhile decrease GSH content, causing ferroptosis in cancer cells. EGFR-IN-178 promotes apoptosis by increasing cleaved caspase-3 expression. EGFR-IN-178 can inhibit the phosphorylation of EGFR protein and decrease the active form p-JAK2 for JAK2, induce an increase in intracellular ROS. EGFR-IN-178 can be used for the study of non-small cell lung cancer (NSCLC).
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Thi-DPPY
0 ImagesCat. No.: HY-147742CAS No.: 2307699-34-7Thi-DPPY (compound 8e) is a potent and orally active JAK3 inhibitor with IC50 values of 62.4, 1.38 nM for BTK, JAK, respectively. Thi-DPPY shows anti-proliferative activity against HBE cells. Thi-DPPY shows anti-inflammatory activity in vivo. Thi-DPPY has the potential for the research of idiopathic pulmonary fibrosis (IPF).
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Tofacitinib-13C,d3
0 ImagesCat. No.: HY-40354S2Synonyms: Tasocitinib-13C,d3; CP-690550-13C,d3Tofacitinib-13C,d3 (Tasocitinib-13C,d3; CP-690550-13C,d3) is the deuterated, 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.
