2. Epigenetics
  3. Epigenetic Reader Domain
  4. MS645

MS645 is a bivalent BET bromodomains (BrD) inhibitor with a Ki of 18.4 nM for BRD4-BD1/BD2. MS645 spatially constrains bivalent inhibition of BRD4 BrDs resulting in a sustained repression of BRD4 transcriptional activity in solid-tumor cells.

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MS645 Chemical Structure

MS645 Chemical Structure

CAS No. : 2250091-96-2

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10 mM * 1 mL in DMSO
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Customer Review

Based on 1 publication(s) in Google Scholar

MS645 Related Antibodies

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  • Biological Activity

  • Purity & Documentation

  • References

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Description

MS645 is a bivalent BET bromodomains (BrD) inhibitor with a Ki of 18.4 nM for BRD4-BD1/BD2. MS645 spatially constrains bivalent inhibition of BRD4 BrDs resulting in a sustained repression of BRD4 transcriptional activity in solid-tumor cells[1].

IC50 & Target[1]

BRD4(BD1BD2)

18.4 nM (Ki)

In Vitro

MS645 has cell growth inhibitory effects on noncancer cell lines of mouse macrophage RAW cells and nontumorigenic breast epithelial MCF10A with IC50s of 4.1 nM, 6.8 nM, 7.9 nM for triple-negative breast cancer (TNBC) cell lines HS5878T, BT549, and MCF 10A[1].
MS645 (15, 30, 60 nM) results in a dramatic reduction of c-Myc expression and an increase of p21, a tumor suppressor and cell-cycle inhibitor in HCC1806 cells[1].

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

MS645 Related Antibodies
Molecular Weight

938.04

Formula

C48H54Cl2N10O2S2
CAS No.
Appearance

Solid

Color

Light yellow to yellow

SMILES

O=C(NCCCCCCCCCCNC(C[C@H]1C2=NN=C(C)N2C3=C(C(C)=C(C)S3)C(C4=CC=C(Cl)C=C4)=N1)=O)C[C@H]5C6=NN=C(C)N6C7=C(C(C)=C(C)S7)C(C8=CC=C(Cl)C=C8)=N5
Shipping

Room temperature in continental US; may vary elsewhere.
Storage

-20°C, stored under nitrogen

*In solvent : -80°C, 6 months; -20°C, 1 month (stored under nitrogen)

Solvent & Solubility
In Vitro: 

DMSO : 200 mg/mL (213.21 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 1.0661 mL 5.3303 mL 10.6605 mL
5 mM 0.2132 mL 1.0661 mL 2.1321 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, 6 months; -20°C, 1 month (stored under nitrogen). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

  • Molarity Calculator

  • Dilution Calculator

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

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Molecular Weight *

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: ≥ 5 mg/mL (5.33 mM); Clear solution

    This protocol yields a clear solution of ≥ 5 mg/mL (saturation unknown).

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (50.0 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% Corn Oil

    Solubility: ≥ 5 mg/mL (5.33 mM); Clear solution

    This protocol yields a clear solution of ≥ 5 mg/mL (saturation unknown). If the continuous dosing period exceeds half a month, please choose this protocol carefully.

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (50.0 mg/mL) to 900 μL Corn oil, and mix evenly.

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

Dosage

mg/kg

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(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).

*In solvent : -80°C, 6 months; -20°C, 1 month (stored under nitrogen)

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
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, 6 months; -20°C, 1 month (stored under nitrogen). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
DMSO 1 mM 1.0661 mL 5.3303 mL 10.6605 mL 26.6513 mL
5 mM 0.2132 mL 1.0661 mL 2.1321 mL 5.3303 mL
10 mM 0.1066 mL 0.5330 mL 1.0661 mL 2.6651 mL
15 mM 0.0711 mL 0.3554 mL 0.7107 mL 1.7768 mL
20 mM 0.0533 mL 0.2665 mL 0.5330 mL 1.3326 mL
25 mM 0.0426 mL 0.2132 mL 0.4264 mL 1.0661 mL
30 mM 0.0355 mL 0.1777 mL 0.3554 mL 0.8884 mL
40 mM 0.0267 mL 0.1333 mL 0.2665 mL 0.6663 mL
50 mM 0.0213 mL 0.1066 mL 0.2132 mL 0.5330 mL
60 mM 0.0178 mL 0.0888 mL 0.1777 mL 0.4442 mL
80 mM 0.0133 mL 0.0666 mL 0.1333 mL 0.3331 mL
100 mM 0.0107 mL 0.0533 mL 0.1066 mL 0.2665 mL
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MS645 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.

Keywords:

MS6452250091-96-2MS 645MS-645Epigenetic Reader DomainInhibitorinhibitorinhibit

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