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BRCA2-RAD51-IN-3

Cat No.:V130617 Purity: ≥98%
BRCA2-RAD51-IN-3 is a RAD51-BRCA2 protein-protein interaction inhibitor with an EC50 of 29.35 μM and a Kd of 75.14 μM.
BRCA2-RAD51-IN-3
BRCA2-RAD51-IN-3 Chemical Structure Product category: RAD51
This product is for research use only, not for human use. We do not sell to patients.
Size Price
500mg
1g
Other Sizes
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Product Description
BRCA2-RAD51-IN-3 is a protein-protein interaction inhibitor of RAD51-BRCA2, with an EC50 of 29.35 μM and a Kd of 75.14 μM. BRCA2-RAD51-IN-3 blocks the binding of RAD51-BRCA2, inhibits homologous recombination in cancer cells, and induces synthetic lethality. BRCA2-RAD51-IN-3 is effective against human pancreatic cancer cells but has no activity against normal pancreatic cells. BRCA2-RAD51-IN-3 can be used for pancreatic cancer research.
Biological Activity I Assay Protocols (From Reference)
ln Vitro
BRCA2-RAD51-IN-3 (compound 19) inhibited the protein-protein interaction of RAD51-BRCA2 in in vitro ELISA assays, with an EC50 of 29.35 μM and a maximum inhibition rate of 76%[1]. BRCA2-RAD51-IN-3 can directly bind to recombinant human RAD51, and its Kd value was 75.14 μM as determined by MST[1]. Nuclear magnetic resonance (NMR) displacement assays confirmed that BRCA2-RAD51-IN-3 (50 μM; 1 μM RAD51 plus 2-5 μM BRC4 peptide) can bind to the RAD51-BRCA2 interaction interface[1]. BRCA2-RAD51-IN-3 (10-80 μM) inhibited homologous recombination in BxPC-3 cells in a dose-dependent manner, with an IC50 of 21.74 μM and an inhibition rate of 81% at 80 μM[1]. BRCA2-RAD51-IN-3 (10-60 μM) inhibited homologous recombination in HEK-293 cells, reducing the proportion of cells with homologous recombination activity at 40 μM [1]. BRCA2-RAD51-IN-3 disrupted the formation of RAD51 aggregates in BxPC-3 cells following cisplatin-induced DNA damage, consistent with the inhibition of RAD51-BRCA2-mediated DNA repair [1]. BRCA2-RAD51-IN-3 (40 μM; 6 days, in combination with 10 μM olaparib) synergistically reduced cell viability in two-dimensional BxPC-3 and HPAC cells (interaction indices of 0.77 and 0.72, respectively), had no significant effect on the viability of normal H-6037 pancreatic epithelial cells, and induced apoptosis in BxPC-3 and HPAC cells, as evidenced by a significantly increased BAX/BCL2 ratio. BRCA2-RAD51-IN-3 (40-60 μM; 144 hours, used in combination with 10 μM olaparib) synergistically reduced the viability of three-dimensional BxPC-3 spheres, inhibited their growth, and induced their death, with a three-dimensional interaction index of 0.85 after 144 hours of treatment [1].
Cell Assay
Cell viability assay [1]
Cell Types: BxPC-3 human pancreatic adenocarcinoma cells (two-dimensional culture)
Tested Concentrations: 40 μM (used in combination with 10 μM olaparib)
Incubation Duration: 6 days
Experimental Results: No significant effect on cell viability; when used in combination with olaparib, it significantly enhanced anti-proliferative activity, with an interaction index of 0.77, indicating a synergistic effect.
Cell viability assay [1]
Cell Types: HPAC human pancreatic adenocarcinoma cells (2D culture)
Tested Concentrations: 40 μM (used in combination with 10 μM olaparib)
Incubation Duration: 6 days
Experimental Results: No significant effect on cell viability; when used in combination with olaparib, it significantly enhanced antiproliferative activity, with an interaction index of 0.72, indicating a synergistic effect.
Cell viability assay [1]
Cell Types: H-6037 normal human pancreatic epithelial cells (two-dimensional culture)
Tested Concentrations: 40 μM (used in combination with 10 μM olaparib)
Incubation Duration: 6 days
Experimental Results: This combination had no significant effect on cell viability.
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Cell viability assay [1]
Cell Types: BxPC-3 human pancreatic adenocarcinoma cells (3D spheroid culture)
Tested Concentrations: 40-60 μM (used in combination with 10 μM olaparib)
Incubation Duration: 6 days
Experimental Results: No significant effect on spheroid viability or volume; when used in combination with olaparib, 60 μM significantly reduced spheroid viability and volume and increased cell death, with a 3D interaction index of 0.85, indicating a synergistic effect.
Apoptosis analysis [1]
Cell Types: BxPC-3 and HPAC human pancreatic adenocarcinoma cells
Tested Concentrations: 40 μM (in combination with 10 μM olaparib)
Incubation Duration: 6 days
Experimental Results: The ratio of BAX/BCL2 in both cell lines was significantly increased, indicating that apoptosis was induced.

References

[1]. Targeting RAD51-BRCA2 Interaction to Enhance Synthetic Lethality with Olaparib in Pancreatic Cancer: Development of a Novel Phenyl Furan-Quinoline-Carboxylic Acid Series. ACS Med Chem Lett. 2026;17(2):520-530. Published 2026 Jan 26.

These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C21H14NNAO4
Molecular Weight
367.33
Appearance
Typically exists as solids at room temperature
SMILES
O=C(C1=CC(C2=CC=C(C3=CC=CC=C3)O2)=NC4=CC=C(OC)C=C14)O[Na]
HS Tariff Code
2934.99.9001
Storage

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Shipping Condition
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
Solubility Data
Solubility (In Vitro)
May dissolve in DMSO (in most cases), if not, try other solvents such as H2O, Ethanol, or DMF with a minute amount of products to avoid loss of samples
Solubility (In Vivo)
Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples.

Injection Formulations
(e.g. IP/IV/IM/SC)
Injection Formulation 1: DMSO : Tween 80: Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution 50 μL Tween 80 850 μL Saline)
*Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution.
Injection Formulation 2: DMSO : PEG300Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO 400 μLPEG300 50 μL Tween 80 450 μL Saline)
Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO 900 μL Corn oil)
Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals).
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Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO 900 μL (20% SBE-β-CD in saline)]
*Preparation of 20% SBE-β-CD in Saline (4°C,1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution.
Injection Formulation 5: 2-Hydroxypropyl-β-cyclodextrin : Saline = 50 : 50 (i.e. 500 μL 2-Hydroxypropyl-β-cyclodextrin 500 μL Saline)
Injection Formulation 6: DMSO : PEG300 : castor oil : Saline = 5 : 10 : 20 : 65 (i.e. 50 μL DMSO 100 μLPEG300 200 μL castor oil 650 μL Saline)
Injection Formulation 7: Ethanol : Cremophor : Saline = 10: 10 : 80 (i.e. 100 μL Ethanol 100 μL Cremophor 800 μL Saline)
Injection Formulation 8: Dissolve in Cremophor/Ethanol (50 : 50), then diluted by Saline
Injection Formulation 9: EtOH : Corn oil = 10 : 90 (i.e. 100 μL EtOH 900 μL Corn oil)
Injection Formulation 10: EtOH : PEG300Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL EtOH 400 μLPEG300 50 μL Tween 80 450 μL Saline)


Oral Formulations
Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium)
Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose
Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals).
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Oral Formulation 3: Dissolved in PEG400
Oral Formulation 4: Suspend in 0.2% Carboxymethyl cellulose
Oral Formulation 5: Dissolve in 0.25% Tween 80 and 0.5% Carboxymethyl cellulose
Oral Formulation 6: Mixing with food powders


Note: Please be aware that the above formulations are for reference only. InvivoChem strongly recommends customers to read literature methods/protocols carefully before determining which formulation you should use for in vivo studies, as different compounds have different solubility properties and have to be formulated differently.

 (Please use freshly prepared in vivo formulations for optimal results.)
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 2.7223 mL 13.6117 mL 27.2235 mL
5 mM 0.5445 mL 2.7223 mL 5.4447 mL
10 mM 0.2722 mL 1.3612 mL 2.7223 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.

Calculator

Molarity Calculator allows you to calculate the mass, volume, and/or concentration required for a solution, as detailed below:

  • Calculate the Mass of a compound required to prepare a solution of known volume and concentration
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  • Calculate the Concentration of a solution resulting from a known mass of compound in a specific volume
An example of molarity calculation using the molarity calculator is shown below:
What is the mass of compound required to make a 10 mM stock solution in 5 ml of DMSO given that the molecular weight of the compound is 350.26 g/mol?
  • Enter 350.26 in the Molecular Weight (MW) box
  • Enter 10 in the Concentration box and choose the correct unit (mM)
  • Enter 5 in the Volume box and choose the correct unit (mL)
  • Click the “Calculate” button
  • The answer of 17.513 mg appears in the Mass box. In a similar way, you may calculate the volume and concentration.

Dilution Calculator allows you to calculate how to dilute a stock solution of known concentrations. For example, you may Enter C1, C2 & V2 to calculate V1, as detailed below:

What volume of a given 10 mM stock solution is required to make 25 ml of a 25 μM solution?
Using the equation C1V1 = C2V2, where C1=10 mM, C2=25 μM, V2=25 ml and V1 is the unknown:
  • Enter 10 into the Concentration (Start) box and choose the correct unit (mM)
  • Enter 25 into the Concentration (End) box and select the correct unit (mM)
  • Enter 25 into the Volume (End) box and choose the correct unit (mL)
  • Click the “Calculate” button
  • The answer of 62.5 μL (0.1 ml) appears in the Volume (Start) box
g/mol

Molecular Weight Calculator allows you to calculate the molar mass and elemental composition of a compound, as detailed below:

Note: Chemical formula is case sensitive: C12H18N3O4  c12h18n3o4
Instructions to calculate molar mass (molecular weight) of a chemical compound:
  • To calculate molar mass of a chemical compound, please enter the chemical/molecular formula and click the “Calculate’ button.
Definitions of molecular mass, molecular weight, molar mass and molar weight:
  • Molecular mass (or molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
  • Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.
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Reconstitution Calculator allows you to calculate the volume of solvent required to reconstitute your vial.

  • Enter the mass of the reagent and the desired reconstitution concentration as well as the correct units
  • Click the “Calculate” button
  • The answer appears in the Volume (to add to vial) box
In vivo Formulation Calculator (Clear solution)
Step 1: Enter information below (Recommended: An additional animal to make allowance for loss during the experiment)
Step 2: Enter in vivo formulation (This is only a calculator, not the exact formulation for a specific product. Please contact us first if there is no in vivo formulation in the solubility section.)
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Calculation results

Working concentration mg/mL;

Method for preparing DMSO stock solution mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.

Method for preparing in vivo formulation:Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O,mix and clarify.

(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
             (2) Be sure to add the solvent(s) in order.

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