1. Epigenetics Stem Cell/Wnt Protein Tyrosine Kinase/RTK JAK/STAT Signaling Apoptosis
  2. JAK Apoptosis
  3. Tofacitinib

Tofacitinib  (Synonyms: Tasocitinib; CP-690550)

Cat. No.: HY-40354 Purity: 99.94%
COA Handling Instructions

Tofacitinib is an orally available JAK3/2/1 inhibitor with IC50s of 1, 20, and 112 nM, respectively.

For research use only. We do not sell to patients.

Tofacitinib Chemical Structure

Tofacitinib Chemical Structure

CAS No. : 477600-75-2

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10 mM * 1 mL in DMSO
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Customer Review

Based on 48 publication(s) in Google Scholar

Other Forms of Tofacitinib:

Top Publications Citing Use of Products

47 Publications Citing Use of MCE Tofacitinib

IP

    Tofacitinib purchased from MedChemExpress. Usage Cited in: Pulm Pharmacol Ther. 2017 Apr;43:60-67.  [Abstract]

    Effect of Tofacitinib administered 1 h before LPS challenge. (A) Effect of different doses of Tofacitinib on STAT3 activation in lung homogenates obtained 30 min after LPS challenge. (B) Effect of different doses of Tofacitinib on STAT3 activation in lung homogenates obtained 4 h after LPS challenge.

    View All JAK Isoform Specific Products:

    • Biological Activity

    • Protocol

    • Purity & Documentation

    • References

    • Customer Review

    Description

    Tofacitinib is an orally available JAK3/2/1 inhibitor with IC50s of 1, 20, and 112 nM, respectively.

    IC50 & Target[1]

    JAK3

    1 nM (IC50)

    JAK2

    20 nM (IC50)

    JAK1

    112 nM (IC50)

    Rock-II

    3400 nM (IC50)

    Lck

    3870 nM (IC50)

    In Vitro

    Tofacitinib (CP-690550) citrate binds potentially at JAK3 and JAK2 as 2.2 nM and 5 nM (Kd). The report includes additional binding for Tofacitinib at Camk1 (Kd of 5,000 nM), DCamkL3 (Kd of 4.5 nM), Mst2 (Kd of 4,300 nM), Pkn1 (Kd of 200 nM), Rps6ka2 (Kin.Dom.2-C-terminal) (Kd of 1,400 nM), Rps6ka6 (Kin.Dom.2-C-terminal) (Kd of 1,200 nM), Snark (Kd of 420 nM), Tnk1 (Kd of 640 nM) and Tyk2 (Kd of 620 nM)[1].

    MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

    In Vivo

    Animals that are treated with Tofacitinib show a significantly lower production of anti-drug antibodies (ADAs) compare with PEG-treated control mice (for five weeks after initial immunization, p<0.01, n=8). Moreover ADAs become detectable earliest on day 28. A difference of 1000- to 200-fold in titers to SS1P is apparent from days 21 through 35, respectively. Compare to SS1P, mice injected with keyhole limpet hemocyanin (KLH) generate a more rapid antibody response. Yet, the administration of Tofacitinib reduces anti-KLH titers compare to controls (p<0.05 on day 21, p<0.01 on day 28, respectively, n=5). Reductions in titers ranged from 5000- to 250-fold from days 21 through 28, respectively[2]. Based on previous dose-response studies, a daily dose of Tofacitinib of 6.2 mg/kg is selected to provide 80% inhibition of hind paw volume and plasma exposure capable of suppressing the JAK1 and JAK3 signaling pathways for >4 hours[3].

    MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

    Clinical Trial
    Molecular Weight

    312.37

    Formula

    C16H20N6O

    CAS No.
    Appearance

    Solid

    Color

    Off-white to light yellow

    SMILES

    O=C(CC#N)N1C[C@H](N(C2=C3C(NC=C3)=NC=N2)C)[C@H](C)CC1

    Shipping

    Room temperature in continental US; may vary elsewhere.

    Storage
    Powder -20°C 3 years
    4°C 2 years
    In solvent -80°C 2 years
    -20°C 1 year
    Solvent & Solubility
    In Vitro: 

    DMSO : 125 mg/mL (400.17 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

    Ethanol : 2.5 mg/mL (8.00 mM; Need ultrasonic)

    H2O : 0.15 mg/mL (0.48 mM; Need ultrasonic and warming)

    Preparing
    Stock Solutions
    Concentration Solvent Mass 1 mg 5 mg 10 mg
    1 mM 3.2013 mL 16.0067 mL 32.0133 mL
    5 mM 0.6403 mL 3.2013 mL 6.4027 mL
    View the Complete Stock Solution Preparation Table

    * Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
    Storage method and period of stock solution: -80°C, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.

    * Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.

    • Molarity Calculator

    • Dilution Calculator

    Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

    Mass
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    Volume
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    Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

    This equation is commonly abbreviated as: C1V1 = C2V2

    Concentration (start)

    C1

    ×
    Volume (start)

    V1

    =
    Concentration (final)

    C2

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    Volume (final)

    V2

    In Vivo:

    Select the appropriate dissolution method based on your experimental animal and administration route.

    For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
    To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for in vivo experiments, it is recommended to prepare freshly and use it on the same day.
    The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.

    • Protocol 1

      Add each solvent one by one:  5% DMSO    40% PEG300    5% Tween-80    50% Saline

      Solubility: ≥ 2.5 mg/mL (8.00 mM); Clear solution

    • Protocol 2

      Add each solvent one by one:  5% DMSO    95% (20% SBE-β-CD in Saline)

      Solubility: ≥ 2.5 mg/mL (8.00 mM); Clear solution

    For the following dissolution methods, please prepare the working solution directly. It is recommended to prepare fresh solutions and use them promptly within a short period of time.
    The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.

    • Protocol 1

      Add each solvent one by one:  0.5% MC  0.5% Tween-80

      Solubility: 5 mg/mL (16.01 mM); Suspended solution; Need ultrasonic

    In Vivo Dissolution Calculator
    Please enter the basic information of animal experiments:

    Dosage

    mg/kg

    Animal weight
    (per animal)

    g

    Dosing volume
    (per animal)

    μL

    Number of animals

    Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
    Please enter your animal formula composition:
    %
    DMSO +
    +
    %
    Tween-80 +
    %
    Saline
    Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
    The co-solvents required include: DMSO, . All of co-solvents are available by MedChemExpress (MCE). , Tween 80. All of co-solvents are available by MedChemExpress (MCE).
    Calculation results:
    Working solution concentration: mg/mL
    Method for preparing stock solution: mg drug dissolved in μL  DMSO (Stock solution concentration: mg/mL).
    The concentration of the stock solution you require exceeds the measured solubility. The following solution is for reference only. If necessary, please contact MedChemExpress (MCE).
    Method for preparing in vivo working solution for animal experiments: Take μL DMSO stock solution, add μL . μL , mix evenly, next add μL Tween 80, mix evenly, then add μL Saline.
     If the continuous dosing period exceeds half a month, please choose this protocol carefully.
    Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.
    Purity & Documentation

    Purity: 99.99%

    References
    Kinase Assay
    [1]

    Kinase activity is recorded via a competition binding assay of selected kinases that are fused to a proprietary tag. Measurements of the amount of kinase binds to an immobilized, active-site directed ligand in the presence and absence of the test compound (e.g., Tofacitinib) provide a % of DMSO control for binding of ligand. Activities between 0 and 10 are selected for Kd determinations. Dendrogram representations are generated by an in-house visualization tool designated PhyloChem[1].

    MCE has not independently confirmed the accuracy of these methods. They are for reference only.

    Cell Assay
    [1]

    Human CD4+ positive cells are enriched from peripheral blood mononuclear cells obtained from a healthy donor by magnetic separation (CD4+ MACS beads). CD4+ cells are activated for 3 days with plate bound anti-CD3 and anti CD28 antibodies (5 ug/mL each), and then expanded for another 4 days in the presence of IL-2 (50 U/mL). Cells are rested overnight in 1% RPMI, and pre-incubated with Tofacitinib or DMSO control for 1 hour at indicated concentrations (5 nM, 50 nM, 500 nM; DMSO concentration is equal in all preparations) and then activated with IL-2 (1000 u/mL) or IL-12 (100 ng/mL) for 15 minutes. Cells (10×106/condition) are lysed in 1% Triton-x lysis buffer and equal amounts of cell lysate are run in NuPage Bis-Tris gel (4-12% gradient). Proteins are transferred onto nitrocellulose membrane. Detection is done with indicated antibodies using Odyssey western blotting system[1].

    MCE has not independently confirmed the accuracy of these methods. They are for reference only.

    Animal Administration
    [2][3]

    Mice[2]
    Female BALB/c mice (6-8 weeks old) are used. Mice receive Tofacitinib in PEG300 (100 mg/mL) or vehicle alone (PEG300) by osmotic pump infusion (Alzet Model 2004, 0.25 μL/hour, 28 days). Four days prior to immunization, mice are anesthetized and their dorsal surface is shaved. A one cm incision is made on the back to create a subcutaneous pocket and insert the pump. The incision site is closed with wound clips. Mice are injected weekly (i.p.) with SS1P recombinant immunotoxin (RIT; 5 μg/mouse) beginning on day 0; control mice received injections of saline alone. Every week before SS1P or vehicle immunization, 50 μL of blood is drawn to obtain serum samples. Sera are stored at −80°C until analyzed.
    Rats[3]
    Adjuvant-induced arthritis (AIA) is induced in female Lewis rats. Rats are randomized according to hind paw volume and assigned to Tofacitinib or vehicle treatment regimens. Groups of 7-8 rats per treatment group, and normal naive rats (n=4 per group), are euthanized either 4 hours, 4 days, or 7 days after beginning treatment (days 16, 20, and 23 after immunization, respectively). Tofacitinib is suspended in 0.5% methylcellulose/0.025% Tween 20 for in vivo studies. Once-daily oral administration of vehicle or Tofacitinib (6.2 mg/kg) is initiated on day 16 following immunization and continued through day 23. Paw volumes are reassessed 4 and 7 days after the beginning of treatment (days 20 and 23 after immunization, respectively). For micro-computed tomography (micro-CT) imaging, as well as tartrate-resistant acid phosphatase (TRAP) staining in paw tissue, AIA is induced in a separate cohort of Lewis rats.

    MCE has not independently confirmed the accuracy of these methods. They are for reference only.

    References

    Complete Stock Solution Preparation Table

    * Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
    Storage method and period of stock solution: -80°C, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.

    Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
    Ethanol / DMSO 1 mM 3.2013 mL 16.0067 mL 32.0133 mL 80.0333 mL
    5 mM 0.6403 mL 3.2013 mL 6.4027 mL 16.0067 mL
    DMSO 10 mM 0.3201 mL 1.6007 mL 3.2013 mL 8.0033 mL
    15 mM 0.2134 mL 1.0671 mL 2.1342 mL 5.3356 mL
    20 mM 0.1601 mL 0.8003 mL 1.6007 mL 4.0017 mL
    25 mM 0.1281 mL 0.6403 mL 1.2805 mL 3.2013 mL
    30 mM 0.1067 mL 0.5336 mL 1.0671 mL 2.6678 mL
    40 mM 0.0800 mL 0.4002 mL 0.8003 mL 2.0008 mL
    50 mM 0.0640 mL 0.3201 mL 0.6403 mL 1.6007 mL
    60 mM 0.0534 mL 0.2668 mL 0.5336 mL 1.3339 mL
    80 mM 0.0400 mL 0.2001 mL 0.4002 mL 1.0004 mL
    100 mM 0.0320 mL 0.1601 mL 0.3201 mL 0.8003 mL

    * Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.

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