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    InvivoChem Cat #: V0339
    CAS #: 857064-38-1Purity ≥98%

    Description: WP1066, an analogue of the JAK2 inhibitor AG49, is a novel and potent inhibitor of JAK2 and STAT3 with IC50 of 2.30 μM and 2.43 μM in HEL cells. WP1066 inhibits the growth of xenograft tumors generated from Caki-1 renal carcinoma cells (RCC) suppressing tumor angiogenesis and exhibits antiproliferative activity in AML colony-forming cells from newly diagnosed AML patients as well as in AML cell lines OCIM2 and K562, which potentiates it to treat RCC, acute myeloid leukemia (AML) and other hematologic maglignancies.

    References: Clin Cancer Res. 2008 Feb 1;14(3):788-96; Cancer Res. 2007 Dec 1;67(23):11291-9; Br J Cancer. 2010 May 25;102(11):1592-9. 

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    Molecular Weight (MW)356.22
    CAS No.857064-38-1
    Storage-20℃ for 3 years in powder form
    -80℃ for 2 years in solvent
    Solubility (In vitro)DMSO: 71 mg/mL (199.3 mM)
    Water: <1 mg/mL
    Ethanol: <1 mg/mL
    SMILES Code O=C(N[[email protected]](C1=CC=CC=C1)C)/C(C#N)=C/C2=NC(Br)=CC=C2

    WP-1066; WP 1066; WP1066

    Chemical Name: (S,E)-3-(6-bromopyridin-2-yl)-2-cyano-N-(1-phenylethyl)acrylamide


    InChi Code: InChI=1S/C17H14BrN3O/c1-12(13-6-3-2-4-7-13)20-17(22)14(11-19)10-15-8-5-9-16(18)21-15/h2-10,12H,1H3,(H,20,22)/b14-10+/t12-/m0/s1

    SMILES Code: O=C(N[[email protected]](C1=CC=CC=C1)C)/C(C#N)=C/C2=NC(Br)=CC=C2 

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    In Vitro

    In vitro activity: WP1066 markedly inhibits the growth of HEL cells carrying the JAK2 V617F mutant isoform in a dose-dependent manner with IC20, IC50 and IC80 of 0.8, 2.3 and 3.8 μM. WP1066 at concentrations of 0.5, 1.0, 2.0, 3.0, or 4.0 μM inhibits the phosphorylation of JAK2, STAT3, STAT5, and ERK1/2 without affecting the phosphorylation of JAK1 and JAK3 in erythroid leukemia HEL cells that express the JAK2 V617F isoform. WP1066 at concentrations ranging from 0.5 to 3.0 μM inhibits the proliferation of AML colony-forming cells obtained from patients and that of the AML cell lines OCIM2 and K562 in a dose-dependent manner. WP1066 at concentrations of 0.5, 1.0, 2.0, 3.0, or 4.0 μM dose-dependently decreases JAK2 and pJAK2 protein levels as well as downstream phosphorylation levels of STAT3, STAT5, and AKT in OCIM2 and K562 cells. WP1066 at concentrations of 2 μM inhibits OCIM2 cell multiplication by inducing accumulation of cells at the G0-G1 phase of the cell cycle. WP1066 at concentrations of 1, 2, or 3 μM induces apoptosis in both OCIM2 and K562 cells in a dose-dependent fashion by activating procaspase-3 and cleaving PARP. WP1066 at concentrations of 5 μM prevents the phosphorylation of STAT3, and at concentrations of 2.5μM WP1066 significantly inhibits cell survival and proliferation in Caki-1 and 786-O renal cancer cells. WP1066 at concentrations of 5 μM suppresses HIF1α and HIF2α expression and VEGF production in Caki-1 and 786-O renal cancer cells.

    Kinase Assay: WP1066 is an inhibitor of JAK2 and STAT3, and also shows effect on STAT5 and ERK1/2, without affecting JAK1 and JAK3.

    Cell Assay: The 3, [4,5-dimethylthiazol-2-yl]-5-[3-carboxymethoxyphenyl]-2-[4-sulfophenyl]-2H-tetrazolium (MTT) assay is done using an MTT-based cell proliferation/cytotoxicity assay system. Briefly, fresh low-density peripheral blood cells and various cell lines at the logarithmic phase of their growth are washed twice in RPMI 1640 containing 10% FCS and counted in a hemocytometer. Cell viability is assessed by the trypan blue (0.1%) staining method. Equal numbers of viable cells (5 × 104 per well) are incubated in a total volume of 100 μL of RPMI 1640 supplemented with 10% FCS alone or with WP1066 at increasing concentrations; the incubations are continued for up to 72 h in 96-well flat-bottomed plates at 37 °C in a humidified 5% CO2 atmosphere. Experiments for each condition are done in triplicate. After incubation, 20 μL of CellTiter96 One Solution Reagent are added to each well. The plates are then incubated for an additional 60 min at 37 °C in a humidified 5% CO2 atmosphere. Immediately after incubation, absorbance is read using a 96-well plate reader at a wavelength of 490 nm.

    In VivoWP1066 orally administrated at dose of 40 mg/kg once daily for 19 days significantly inhibits the tumours growth in Caki-1 xenograft mice, with decreased immunostaining of phosphorylated STAT3 and reduced length of CD34-positive vessels.
    Animal modelCaki-1 xenograft mice
    Formulation & DosageDissolved in DMSO:polyethylene glycol 300 (20:80); 40 mg/kg; Oral gavage

    Clin Cancer Res. 2008 Feb 1;14(3):788-96; Cancer Res. 2007 Dec 1;67(23):11291-9; Br J Cancer. 2010 May 25;102(11):1592-9. 

    These protocols are for reference only. InvivoChem does not independently validate these methods.




    WP1066 downregulates HIF1α and HIF2α expression and reduces VEGF production in renal cancer cells. Br J Cancer. 2010 May 25;102(11):1592-9. 


    WP1066 inhibits tumour growth in the murine xenograft model of Caki-1 cells. Br J Cancer. 2010 May 25;102(11):1592-9. 


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