1. Protein Tyrosine Kinase/RTK
  2. FAK
  3. Defactinib

Defactinib  (Synonyms: VS-6063; PF-04554878)

Cat. No.: HY-12289 Purity: 99.87%
COA Handling Instructions

Defactinib (VS-6063; PF-04554878) is a novel FAK inhibitor with potential antiangiogenic and antineoplastic activities.

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

Defactinib Chemical Structure

Defactinib Chemical Structure

CAS No. : 1073154-85-4

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Solid + Solvent
10 mM * 1 mL in DMSO
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Solution
10 mM * 1 mL in DMSO USD 94 In-stock
Solid
5 mg USD 84 In-stock
10 mg USD 108 In-stock
50 mg USD 300 In-stock
100 mg USD 420 In-stock
200 mg USD 720 In-stock
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Customer Review

Based on 30 publication(s) in Google Scholar

Other Forms of Defactinib:

Top Publications Citing Use of Products

    Defactinib purchased from MedChemExpress. Usage Cited in: J Exp Clin Cancer Res. 2018 Jul 28;37(1):175.  [Abstract]

    Western blot verified the inhibition of FAK Y397 phosphorylation via Defactinib in MCF7-YAP-S127A and MDA-MB-231 cells.
    • Biological Activity

    • Protocol

    • Purity & Documentation

    • References

    • Customer Review

    Description

    Defactinib (VS-6063; PF-04554878) is a novel FAK inhibitor with potential antiangiogenic and antineoplastic activities.

    IC50 & Target

    FAK[1]

    In Vitro

    Defactinib (VS-6063) inhibits FAK phosphorylation at the Tyr397 site in a time- and dose-dependent manner. RPPA data shows that Defactinib reduces levels of AKT and YB-1 in taxane-resistant cell lines. The expression of pFAK (Tyr397) is statistically significantly inhibited by Defactinib in a dose-dependent manner in all cell lines. Defactinib inhibits pFAK (Tyr397) expression within 3 hours, with a gradual return of expression by 48 hours[1].

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

    In Vivo

    Defactinib (VS-6063) doses of 25 mg/kg twice a day or greater statistically significantly inhibits pFAK (Tyr397) at 3 hours, with return of expression noted by 24 hours. Therefore, administration of Defactinib at 25 mg/kg twice a day is selected as the dosing schedule for subsequent therapy experiments. For therapy experiments, female nude mice bearing HeyA8 tumors in the peritoneal cavity are randomly divided into 4 groups (n=10 per group): 1) vehicle orally twice daily and phosphate-buffered saline intraperitoneally weekly (control); 2) Defactinib 25 mg/kg orally twice daily; 3) PTX intraperitoneally weekly; and 4) both VDefactinib 25 mg/kg orally twice daily and PTX intraperitoneally weekly. There is an 87.4% reduction in tumor weight by PTX monotherapy in the HeyA8 model, and combination therapy resulted in the greatest tumor weight reduction, with a 97.9% reduction (P=0.05 compared with PTX). In the SKOV3ip1 model, a 92.7% tumor weight reduction is observed in the combination group compared with PTX (P<0.001)[1].

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

    Clinical Trial
    Molecular Weight

    510.49

    Formula

    C20H21F3N8O3S

    CAS No.
    Appearance

    Solid

    Color

    White to off-white

    SMILES

    O=C(NC)C1=CC=C(NC2=NC=C(C(F)(F)F)C(NCC3=NC=CN=C3N(C)S(=O)(C)=O)=N2)C=C1

    Shipping

    Room temperature in continental US; may vary elsewhere.

    Storage
    Powder -20°C 3 years
    4°C 2 years
    In solvent -80°C 1 year
    -20°C 6 months
    Solvent & Solubility
    In Vitro: 

    DMSO : 50 mg/mL (97.95 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

    H2O : < 0.1 mg/mL (insoluble)

    Preparing
    Stock Solutions
    Concentration Solvent Mass 1 mg 5 mg 10 mg
    1 mM 1.9589 mL 9.7945 mL 19.5890 mL
    5 mM 0.3918 mL 1.9589 mL 3.9178 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, 1 years; -20°C, 6 months. When stored at -80°C, please use it within 1 years. When stored at -20°C, please use it within 6 months.

    • Molarity Calculator

    • Dilution Calculator

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

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

    This equation is commonly abbreviated as: C1V1 = C2V2

    Concentration (start)

    C1

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    Volume (start)

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    C2

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    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 (4.90 mM); Suspended solution; Need ultrasonic

    • Protocol 2

      Add each solvent one by one:  10% DMSO    40% PEG300    5% Tween-80    45% Saline

      Solubility: ≥ 2.08 mg/mL (4.07 mM); Clear solution

      This protocol yields a clear solution of ≥ 2.08 mg/mL (saturation unknown).

      Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (20.8 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.

      Preparation of Saline: Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution.
    In Vivo Dissolution Calculator
    Please enter the basic information of animal experiments:

    Dosage

    mg/kg

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    Dosing volume
    (per animal)

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    Number of animals

    Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
    Please enter your animal formula composition:
    %
    DMSO +
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    %
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    %
    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: 99.87%

    References
    Animal Administration
    [1]

    Mice[1]
    To determine the antitumor effects of Defactinib, SKOV3ip1, SKOV3-TR, HeyA8, and HeyA8-MDR cells are injected intraperitoneally. One week after tumor cell injection, mice are randomly assigned to 4 groups of 10 mice (control, PTX alone, Defactinib alone, and PTX with Defactinib); treatment is initiated at 3-4 weeks following injection. PTX at 2 mg/kg (SKOV3ip1 and SKOV3-TR) or 2.5 mg/kg (HeyA8 and HeyA8-MDR) is given intraperitoneally weekly; Defactinib at 25 mg/kg is given orally twice every day. Control mice received HBSS intraperitoneally once a week and vehicle orally twice every day. Mice are monitored daily for adverse effects of therapy and are killed on day 35 (SKOV3ip1 or SKOV3-TR), day 28 (HeyA8 or HeyA8-MDR), or when any of the mice seemed moribund. Total body weight, tumor incidence and mass, and the number of tumor nodules are recorded. Tumors are either fixed in formalin or embedded in paraffin or snap frozen in optimal cutting temperature (OCT) compound in liquid nitrogen.

    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, 1 years; -20°C, 6 months. When stored at -80°C, please use it within 1 years. When stored at -20°C, please use it within 6 months.

    Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
    DMSO 1 mM 1.9589 mL 9.7945 mL 19.5890 mL 48.9726 mL
    5 mM 0.3918 mL 1.9589 mL 3.9178 mL 9.7945 mL
    10 mM 0.1959 mL 0.9795 mL 1.9589 mL 4.8973 mL
    15 mM 0.1306 mL 0.6530 mL 1.3059 mL 3.2648 mL
    20 mM 0.0979 mL 0.4897 mL 0.9795 mL 2.4486 mL
    25 mM 0.0784 mL 0.3918 mL 0.7836 mL 1.9589 mL
    30 mM 0.0653 mL 0.3265 mL 0.6530 mL 1.6324 mL
    40 mM 0.0490 mL 0.2449 mL 0.4897 mL 1.2243 mL
    50 mM 0.0392 mL 0.1959 mL 0.3918 mL 0.9795 mL
    60 mM 0.0326 mL 0.1632 mL 0.3265 mL 0.8162 mL
    80 mM 0.0245 mL 0.1224 mL 0.2449 mL 0.6122 mL
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    Defactinib Related Classifications

    Help & FAQs
    • Do most proteins show cross-species activity?

      Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

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