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    Baricitinib (LY-3009104, INCB-028050)
    Baricitinib (LY-3009104, INCB-028050)

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    This product is for research use only, not for human use. We do not sell to patients.
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    InvivoChem Cat #: V0338
    CAS #: 1187594-09-7 (free base);Purity ≥98%

    Description: Baricitinib, (also known as LY3009104 or INCB028050; trade name: Olumiant), is a potent, selective, ATP competitive and orally bioavailable inhibitor of tyrosine-protein kinase JAK1 (Janus kinase) or JAK2 with anti-inflammatory activity. It inhibits JAK1 and JAK2 with IC50s values of 5.9 nM and 5.7 nM, respectively. AS of May 2018, it was approved by FDA for the treatment of rheumatoid arthritis (RA) in the United States. In vitro, it is able to inhibit JAK1 and JAK2 with IC50 values in the low nanomolar range of 5.9 and 5.7 nM, respectively, while it displays low inhibitory activity for JAK3 and moderate activity for TYK2. Baricitinib inhibits intracellular signaling of several proinflammatory cytokines such as IL-6 and IL-23 at concentrations<50 nM. JAK signaling is central to a number of fundamental processes including the generation of RBCs. On Nov 20, 2020, the U.S. Food and Drug Administration also issued an emergency use authorization (EUA) for baricitinib to be used in combination with remdesivir, for the treatment of suspected or laboratory confirmed COVID-19 in hospitalized adults and pediatric patients two years of age or older requiring supplemental oxygen, invasive mechanical ventilation, or extracorporeal membrane oxygenation (ECMO). On June 13, 2022, Olumiant (baricitinib) was approved by FDA to treat adult patients with severe alopecia areata, a disorder that often appears as patchy baldness and affects more than 300,000 people in the U.S. each year. Today’s action marks the first FDA approval of a systemic treatment (i.e. treats the entire body rather than a specific location) for alopecia areata.

    References: J Immunol. 2010 May 1;184(9):5298-307; Curr Opin Pharmacol. 2012 Aug;12(4):464-70. 

    Related CAS: 1187595-84-1 (phosphate); 1187594-09-7 (free base) 

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    Molecular Weight (MW)371.42
    FormulaC16H17N7O2S
    CAS No.1187594-09-7 (free base);
    Storage-20℃ for 3 years in powder form
    -80℃ for 2 years in solvent
    Solubility (In vitro)DMSO: >30 mg/mL
    Water: N/A
    Ethanol: N/A
    Solubility (In vivo)0.5% CMC+0.25% Tween 80: 30 mg/mL
    SynonymsOlumiant; Baricitinib; LY-3009104; INCB 028050; LY3009104; LY 3009104; INCB028050; INCB-028050; 
    Chemical Name2-(3-(4-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl)-1-(ethylsulfonyl)azetidin-3-yl)acetonitrile 
    InChi KeyXUZMWHLSFXCVMG-UHFFFAOYSA-N


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    In Vitro

    In vitro activity: INCB018424 potently and selectively inhibits JAK2V617F-mediated signaling and proliferation in Ba/F3 cells and HEL cells. INCB018424 markedly increases apoptosis in a dose dependent manner in Ba/F3 cells. INCB018424 (64 nM) results in a doubling of cells with depolarized mitochondria in Ba/F3 cells. INCB018424 inhibits proliferating of erythroid progenitors from normal donors and polycythemia vera patients with IC50 of 407 nM and 223 nM, respectively. INCB018424 demonstrates remarkable potency against erythroid colony formation with IC50 of 67nM.


    Kinase Assay: Recombinant proteins are expressed using Sf21 cells and baculovirus vectors and purified with affinity chromatography. JAK kinase assays use a homogeneous time-resolved fluorescence assay with the peptide substrate (-EQEDEPEGDYFEWLE). Each enzyme reaction is carried out with Ruxolitinib or control, JAK enzyme, 500 nM peptide, adenosine triphosphate (ATP; 1mM), and 2% dimethyl sulfoxide (DMSO) for 1 hour. The 50% inhibitory concentration (IC50) is calculated as INCB018424 concentration required for inhibition of 50% of the fluorescent signal.


    Cell Assay: Cells (Ba/F3 and HEL cells) are seeded at 2 × 103/well of white bottom 96-well plates, treated with INCB018424 from DMSO stocks (0.2% final DMSO concentration), and incubated for 48 hours at 37 ℃ with 5% CO2. Viability is measured by cellular ATP determination using the Cell-Titer Glo luciferase reagent or viable cell counting. Values are transformed to percent inhibition relative to vehicle control, and IC50 curves are fitted according to nonlinear regression analysis of the data using PRISM GraphPad.

    In VivoINCB018424 (180 mg/kg, orally, twice a day) results in survive rate of greater than 90% by day 22 in a JAK2V617F-driven mouse model. INCB018424 (180 mg/kg, orally, twice a day) markedly reduces splenomegaly and circulating levels of inflammatory cytokines, and preferentially eliminated neoplastic cells, resulting in significantly prolonged survival without myelosuppressive or immunosuppressive effects in a JAK2V617F-driven mouse model. The primary end point is reached in 41.9% of patients in the Ruxolitinib group as compared with 0.7% in the placebo group in the double-blind trial of myelofibrosis. Ruxolitinib results in maintaining of reduction in spleen volume and improvement of 50% or more in the total symptom score. A total of 28% of the patients in the Ruxolitinib (15 mg twice daily) group has at least a 35% reduction in spleen volume at week 48 in patients with myelofibrosis, as compared with 0% in the group receiving the best available therapy. The mean palpable spleen length has decreased by 56% with Ruxolitinib but has increased by 4% with the best available therapy at week 48. Patients in the ruxolitinib group has an improvement in overall quality-of-life measures and a reduction in symptoms associated with myelofibrosis.
    Animal modelJAK2V617F-driven mouse model
    Formulation & DosageDissolved in 5% dimethyl acetamide, 0.5% methocellulose; 180 mg/kg/day;  Oral gavage
    References

    Blood. 2010 Apr 15;115(15):3109-17; N Engl J Med. 2012 Mar 1;366(9):799-807; N Engl J Med. 2012 Mar 1;366(9):787-98. 


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

    Baricitinib (LY3009104, INCB028050)

    Cellular activity of INCB028050. J Immunol. 2010 May 1;184(9):5298-307. 

    Baricitinib (LY3009104, INCB028050)

    Anti-inflammatory and DMARD activity of once daily INCB028050 in rats with established disease in the adjuvant arthritis model. J Immunol. 2010 May 1;184(9):5298-307. 

    Baricitinib (LY3009104, INCB028050)

    Suppression of delayed-type hypersensitivity by INCB028050. J Immunol. 2010 May 1;184(9):5298-307. 

    Baricitinib (LY3009104, INCB028050)

    INCB028050 is efficacious and well tolerated independently of effects on humoral immunity. J Immunol. 2010 May 1;184(9):5298-307. 

    Baricitinib (LY3009104, INCB028050)

    INCB028050 improves clinical and histologic signs of disease in the murine CIA model.


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