1. Cell Cycle/DNA Damage Epigenetics Apoptosis
  2. PARP Apoptosis
  3. Niraparib

Niraparib (MK-4827) est un inhibiteur très puissant et biodisponible oralement de PARP1 et de PARP2 avec des IC50s de 3,8 et 2,1 nM, respectivement. Niraparib entraîne l'inhibition de la réparation des dommages à l'ADN, active l'apoptose et montre une activité anti-tumorale.

Niraparib (MK-4827) ist ein hochpotenter und oral bioverfügbarer PARP1 und PARP2-Inhibitor mit IC50-Werten von 3,8 bzw. 2,1 nM. Niraparib führt zur Hemmung der Reparatur von DNA-Schäden, aktiviert die apoptosis und zeigt Anti-Tumor-Aktivität..

Niraparib (MK-4827) is a highly potent and orally bioavailable PARP1 and PARP2 inhibitor with IC50s of 3.8 and 2.1 nM, respectively. Niraparib leads to inhibition of repair of DNA damage, activates apoptosis and shows anti-tumor activity.

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

Niraparib Chemical Structure

Niraparib Chemical Structure

CAS No. : 1038915-60-4

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10 mM * 1 mL in DMSO
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Customer Review

Based on 55 publication(s) in Google Scholar

Other Forms of Niraparib:

Top Publications Citing Use of Products

52 Publications Citing Use of MCE Niraparib

Proliferation Assay
WB

    Niraparib purchased from MedChemExpress. Usage Cited in: Appl Microbiol Biotechnol. 2019 Dec;103(23-24):9557-9568.  [Abstract]

    CDK4 is evaluated via western blot analysis in different cell lines with the treatment of Niraparib in different concentrations and times.

    Niraparib purchased from MedChemExpress. Usage Cited in: Appl Microbiol Biotechnol. 2019 Dec;103(23-24):9557-9568.  [Abstract]

    Cyclin D is evaluated via western blot analysis in different cell lines with the treatment of Niraparib in different concentrations and times.

    Niraparib purchased from MedChemExpress. Usage Cited in: Cancer Chemother Pharmacol. 2017 Oct;80(4):861-867.  [Abstract]

    PARP1 inhibition is lethal to MPM cells. Colony formation assays of clonal cell survival with continuous Niraparib or AZD2281.
    • Biological Activity

    • Purity & Documentation

    • References

    • Customer Review

    Description

    Niraparib (MK-4827) is a highly potent and orally bioavailable PARP1 and PARP2 inhibitor with IC50s of 3.8 and 2.1 nM, respectively. Niraparib leads to inhibition of repair of DNA damage, activates apoptosis and shows anti-tumor activity[1][2][3].

    IC50 & Target[1]

    PARP-2

    2.1 nM (IC50)

    PARP-1

    3.8 nM (IC50)

    V-PARP

    330 nM (IC50)

    TANK-1

    570 nM (IC50)

    PARP-3

    1300 nM (IC50)

    In Vitro

    Niraparib (MK-4827) inhibits PARP activity with EC50=4 nM and EC90=45 nM in a whole cell assay. MK-4827 inhibits proliferation of cancer cells with mutant BRCA-1 and BRCA-2 with CC50 in the 10-100 nM range. MK-4827 displays excellent PARP 1 and 2 inhibition with IC50=3.8 and 2.1 nM, respectively, and in a whole cell assay[1]. To validate that Niraparib (MK-4827) inhibits PARP in these cell lines, A549 and H1299 cells are treated with 1 μM MK-4827 for various times and measured PARP enzymatic activity using a chemiluminescent assay. The results show that Niraparib (MK-4827) inhibits PARP within 15 minutes of treatment reaching about 85% inhibition in the A549 cells at 1 h and about 55% inhibition at 1 h for the H1299 cells[2].

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

    In Vivo

    Niraparib (MK-4827) is well tolerated and demonstrates efficacy as a single agent in a xenograft model of BRCA-1 deficient cancer. Niraparib (MK-4827) is well tolerated in vivo and demonstrates efficacy as a single agent in a xenograft model of BRCA-1 deficient cancer. Niraparib (MK-4827) is characterized by acceptable pharmacokinetics in rats with plasma clearance of 28 (mL/min)/kg, very high volume of distribution (Vdss=6.9 L/kg), long terminal half-life (t1/2=3.4 h), and excellent bioavailability, F=65%[1]. Niraparib (MK-4827) enhances radiation response of p53 mutant Calu-6 tumor in both cases, with the single daily dose of 50 mg/kg being more effective than 25 mg/kg given twice daily[3].

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

    Animal Model: Female nude mice (Ncr Nu/Nu) with solitary tumor xenografts[3]
    Dosage: 25 mg/kg or 50 mg/kg
    Administration: Gavage, 25 mg/kg twice a day with 6 h between doses or 50 mg/kg once daily for 21 consecutive days
    Result: Enhanced radiation response.
    Clinical Trial
    Molecular Weight

    320.39

    Formula

    C19H20N4O

    CAS No.
    Appearance

    Solid

    Color

    White to light yellow

    SMILES

    NC(C1=CC=CC2=CN(C3=CC=C([C@H]4CNCCC4)C=C3)N=C21)=O

    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 : 25 mg/mL (78.03 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 3.1212 mL 15.6060 mL 31.2120 mL
    5 mM 0.6242 mL 3.1212 mL 6.2424 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)

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

    This equation is commonly abbreviated as: C1V1 = C2V2

    Concentration (start)

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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:  10% DMSO    40% PEG300    5% Tween-80    45% Saline

      Solubility: ≥ 2.08 mg/mL (6.49 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.
    • Protocol 2

      Add each solvent one by one:  10% DMSO    90% (20% SBE-β-CD in Saline)

      Solubility: ≥ 2.08 mg/mL (6.49 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 900 μL 20% SBE-β-CD in Saline, and mix evenly.

      Preparation of 20% SBE-β-CD in Saline (4°C, storage for one week): 2 g SBE-β-CD powder is dissolved in 10 mL Saline, completely dissolve until clear.
    In Vivo Dissolution Calculator
    Please enter the basic information of animal experiments:

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    Dosing volume
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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 +
    +
    %
    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: 99.96%

    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 3.1212 mL 15.6060 mL 31.2120 mL 78.0299 mL
    5 mM 0.6242 mL 3.1212 mL 6.2424 mL 15.6060 mL
    10 mM 0.3121 mL 1.5606 mL 3.1212 mL 7.8030 mL
    15 mM 0.2081 mL 1.0404 mL 2.0808 mL 5.2020 mL
    20 mM 0.1561 mL 0.7803 mL 1.5606 mL 3.9015 mL
    25 mM 0.1248 mL 0.6242 mL 1.2485 mL 3.1212 mL
    30 mM 0.1040 mL 0.5202 mL 1.0404 mL 2.6010 mL
    40 mM 0.0780 mL 0.3901 mL 0.7803 mL 1.9507 mL
    50 mM 0.0624 mL 0.3121 mL 0.6242 mL 1.5606 mL
    60 mM 0.0520 mL 0.2601 mL 0.5202 mL 1.3005 mL
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    • 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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