2. Signaling Pathways
  3. JAK/STAT Signaling
    Stem Cell/Wnt
  4. STAT
  5. STAT5 Isoform

STAT5

STAT5 comprises STAT5A and STAT5B, transcription factors that regulate hematopoietic cell proliferation, differentiation, and apoptosis[1]. Mechanistically, STAT5 tyrosine phosphorylation in peripheral T cells is driven by cytokine receptor signaling rather than the T-cell receptor complex[2]. This cytokine-linked pathway supports immune regulation, lymphocyte development, and cell survival programs[3]. In disease contexts, STAT5B deficiency is associated with growth failure, immunodeficiency, and severe pulmonary disease[4]. Compared with STAT5A, STAT5B shows dominant activity in effector and regulatory T-cell responses, with paralog dose explaining much functional specificity[5]. In BCR/ABL leukemia models, STAT5B, but not STAT5A, serves as the major STAT5 isoform driving leukemogenesis[6]. For experimental applications, AC-4-130 directly binds STAT5 and disrupts activation, dimerization, nuclear translocation, and STAT5-dependent transcription in AML models[7]. Pimozide also decreases survival of chronic myelogenous leukemia cells resistant to kinase inhibitors[8].

STAT5 Related Products (55):

Cat. No. Product Name Effect Purity
  • HY-100754
    Ritlecitinib
    		Inhibitor 99.80%
    Ritlecitinib (PF-06651600) 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 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 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).
  • HY-148748
    Butyzamide
    		Activator 99.83%
    Butyzamide is an orally active activator of Mpl, a thrombopoietin (TPO) receptor. Butyzamide increases the phosphorylation level of JAK2, STAT3, STAT5 and MAPK. Butyzamide increases the level of platelets in mouse xenotransplantation assay.
  • HY-101853
    STAT5-IN-1
    		Inhibitor 98.35%
    STAT5-IN-1 is a STAT5 inhibitor with an IC50 of 47 μM for STAT5β isoform.
  • HY-12987
    Pimozide
    		Inhibitor 99.94%
    Pimozide is a dopamine receptor antagonist, with Kis of 1.4 nM, 2.5 nM and 588 nM for dopamine D2, D3 and D1 receptors, respectively, and also has affinity at α1-adrenoceptor, with a Ki of 39 nM; Pimozide also inhibits STAT3 and STAT5.
  • HY-124500
    AC-4-130
    		Inhibitor 99.93%
    AC-4-130 is a potent STAT5 SH2 domain inhibitor. AC-4-130 directly binds to STAT5 and disrupts STAT5 activation, dimerization, nuclear translocation, and STAT5-dependent gene transcription. AC-4-130 induces cell cycle arrest and apoptosis in FLT3-ITD-driven leukemic cells. AC-4-130 has anti-cancer activity and can efficiently block pathological levels of STAT5 activity in acute myeloid leukemia (AML).
  • HY-P991888
    INCA033989
    		Inhibitor
    INCA033989 is a fully human IgG1 monoclonal antibody targeting mutCALR (KD = 1.75 nM for mutCALRdel52; KD = 6.78 nM for mutCALRins5). INCA033989 antagonizes mutCALR-driven signaling and proliferation. INCA033989 selectively inhibits pSTAT3/pSTAT5. INCA033989 prevents thrombocytosis and reduces the expansion of mutCALR-positive cells. INCA033989 is useful for research on myeloproliferative neoplasms .
  • HY-P992474
    TAVO101
    		Inhibitor
    TAVO101 is a humanized anti-TSLP antibody with an EC50 of 0.19 nM against hTSLP. TAVO101 inhibits STAT5 activation and CCL17 release. TAVO101 carries Fc region mutations that enhance its binding to FcRn while reducing its binding to FcγRI, FcγRIIIA and C1q, thereby attenuating effector functions. TAVO101 reduces the levels of inflammatory markers, cell infiltration and histopathological damage in preclinical models of asthma, psoriasis and atopic dermatitis. TAVO101 can be used for research related to asthma, psoriasis and atopic dermatitis.
  • HY-179687
    JAK2-IN-18
    		Inhibitor
    JAK2-IN-18 (Compound example1) is a selective JAK2 inhibitor. JAK2-IN-18 can inhibit JAK-STAT signaling and shows an IC50 of <100 nM for pSTAT5 in HEL9217 cells. JAK2-IN-18 can inhibit the proliferation of abnormally proliferating myeloid cells and can be used for the research of myeloproliferative disorders, such as essential thrombocythemia.
  • HY-126675A
    AS2863619
    		Activator 98.02%
    AS2863619 enables conversion of antigen-specific effector/memory T cells into Foxp3+ regulatory T (Treg) cells for the treatment of various immunological diseases. AS2863619 is a potent, orally active cyclin-dependent kinase 8 (CDK8) and CDK19 inhibitor with IC50s of 0.61 nM and 4.28 nM, respectively. STAT5 activation enhanced by AS2863619 inhibition of CDK8/19, which consequently activates the Foxp3 gene.
  • HY-148813
    AK-2292
    		99.73%
    AK-2292 is a potent and selective STAT5 PROTAC degrader, with a DC50 of 0.10 μM. AK-2292 induces degradation of STAT5A/B proteins in vitro and in vivo. AK-2292 can induce tumor regression in acute myeloid leukemia and chronic myeloid leukemia xenograft mouse models. AK-2292 is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.
  • HY-16975
    SH-4-54
    		Inhibitor 99.80%
    SH-4-54 is a CNS-penetrant STAT inhibitor that binds to STAT3 and STAT5 with KDs of 300, 464 nM, respectively.
  • HY-173236
    STAT4-IN-1
    		Inhibitor 99.17%
    STAT4-IN-1 is an inhibitor of STAT4 with a Ki of 0.35 μM. STAT4-IN-1 is expected to be used in the research of autoimmune diseases, including inflammatory bowel disease, multiple sclerosis, rheumatoid arthritis, and diabetes.
  • HY-131140
    BD750
    		Inhibitor 99.02%
    BD750, an effective immunosuppressant and a JAK3/STAT5 inhibitor, inhibits IL-2-induced JAK3/STAT5-dependent T cell proliferation, with IC50 values of 1.5 μM and 1.1 μM in mouse and human T cells, respectively.
  • HY-169182
    AK-068
    		Ligand 99.57%
    AK-068 is a high-affinity and selective STAT6 ligand, with a Ki of 6 nM. AK-068 demonstrates at least >150- and >85-fold binding selectivity over STAT5A (Ki >1 μM) and STAT5B (Ki >500 μM) proteins, respectively. AK-068 is a ligand for target protein for PROTAC, can be used for synthesis of PROTACs.
  • HY-136546
    Stafia-1
    		Inhibitor 99.39%
    Stafia-1 is a potent STAT5a inhibitor (K i=10.9 μM, IC50=22.2 μM). Stafia-1 displays high selectivity over STAT5b and other STAT family members.
  • HY-19527
    IST5-002
    		Inhibitor 99.83%
    IST5-002, a potent Stat5a/b inhibitor, selectively inhibits transcriptional activity of Stat5a/b (IC50s: 1.5 μM for Stat5a, 3.5 μM for Stat5b). IST5-002 inducs cell apoptotic and death of prostate cancer cells and chronic myeloid leukemia (CML) cells. IST5-002 can be used in the research of prostate cancer and chronic myeloid leukemia (CML).
  • HY-112647
    Stafib-1
    		Inhibitor 99.25%
    Stafib-1 is the first selective inhibitor of the STAT5b SH2 domain, with a Ki of 44 nM and an IC50 of 154 nM.
  • HY-102048
    STAT5-IN-2
    		Inhibitor 98.90%
    STAT5-IN-2 is a STAT5 inhibitor, extracted from reference 1, example 17f. STAT5-IN-2 has potent antileukemic effect.
  • HY-122258
    NSC-370284
    		Inhibitor 99.27%
    NSC-370284 is a selective inhibitor of ten-eleven translocation 1 (TET1) and 5-hydroxymethylcytosine (5hmC). NSC-370284 significantly inhibits the level of TET1 expression via targets STAT3/5.
  • HY-13072
    Cenisertib
    		Inhibitor 99.86%
    Cenisertib (AS-703569) is an ATP-competitive multi-kinase inhibitor that blocks the activity of Aurora-kinase-A/B, ABL1, AKT, STAT5 and FLT3. Cenisertib induces major growth-inhibitory effects by blocking the activity of several different molecular targets in neoplastic mast cells (MC). Cenisertib inhibits tumor growth in xenograft models of pancreatic, breast, colon, ovarian, and lung tumors and leukemia.
Cat. No. Product Name / Synonyms Application Reactivity