2. Epigenetics Apoptosis
  3. Histone Methyltransferase Apoptosis
  4. MS1943

MS1943 is a first-in-class, orally bioavailable EZH2 selective degrader, with an IC50 of 120 nM. MS1943 significantly reduces EZH2 protein levels in numerous triple-negative breast cancer (TNBC) and other cancer and noncancerous cell lines. MS1943 effectively blocks proliferation of multiple TNBC and other cancer cell lines.

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

MS1943 Chemical Structure

MS1943 Chemical Structure

CAS No. : 2225938-17-8

Size Price Stock Quantity
Solid + Solvent
10 mM * 1 mL in DMSO
ready for reconstitution
 USD 554 In-stock
Solution
10 mM * 1 mL in DMSO USD 554 In-stock
Solid
1 mg USD 166 In-stock
5 mg USD 350 In-stock
10 mg USD 580 In-stock
25 mg USD 1100 In-stock
50 mg USD 1700 In-stock
100 mg USD 2500 In-stock
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Customer Review

Based on 1 publication(s) in Google Scholar

MS1943 Related Antibodies

Top Publications Citing Use of Products

1 Publications Citing Use of MCE MS1943

View All Histone Methyltransferase Isoform Specific Products:

View All Isoforms
EZH1 EZH2 DOT1L SMYD2 SMYD3 SUV39H2/KMT1B EHMT2/G9a/KMT1C EHMT1/GLP/KMT1D SETDB1/KMT2G SETD2/KMT3A SETD7/KMT7 SETD8/KMT5A PRMT1 PRMT3 PRMT4 PRMT5 PRMT6 PRMT7 PRMT8

  • Biological Activity

  • Purity & Documentation

  • References

  • Customer Review

Description

MS1943 is a first-in-class, orally bioavailable EZH2 selective degrader, with an IC50 of 120 nM. MS1943 significantly reduces EZH2 protein levels in numerous triple-negative breast cancer (TNBC) and other cancer and noncancerous cell lines. MS1943 effectively blocks proliferation of multiple TNBC and other cancer cell lines[1].

IC50 & Target[1]

EZH2

120 nM (IC50)

In Vitro

MS1943 (0.625-5 μM; 3 days) inhibits cell growth with an GI50 of 2.2 µM[1].
MS1943 (0.625-5 μM; 4 days) induces cell death in MDA-MB-468 cells. MS1943 effectively reduces EZH2 levels in BT549, HCC70 and MDA-MB-231 TNBC cells, as well as KARPAS-422 and SUDHL8 lymphoma cells and PNT2 non-cancerous prostate cells[1].
MS1943 (1.25-5.0 μM; 2 days) inhibits EZH2 and SUZ12 protein levels in a concentration- and timedependent manner, without affecting EED protein levels, whereas the H3K27me3 mark was also suppressed[1].

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

MS1943 Related Antibodies

Cell Viability Assay[1]

Cell Line: MDA-MB-468 cells
Concentration: 0.625, 1.25, 2.5, 5 μM
Incubation Time: 3 days
Result: Inhibits cell growth with an GI50 of 2.2 µM.

Western Blot Analysis[1]

Cell Line: MDA-MB-468 cells
Concentration: 1.25, 2.5, 5.0 μM
Incubation Time: 2 days
Result: Reduced EZH2 protein levels in a concentration- and time-dependent manner.
In Vivo

MS1943 (150 mg/kg body weight; i.p.; once daily for 36 days) suppresses tumor growth[1].
MS1943 induces apoptosis in the MDA-MB-468 xenograft model[1].
A single i.p. injection of MS1943 at 50 mg/kg body weight achieved a peak plasma concentration (Cmax) of 2.9 µM and resulted in plasma concentrations above its cellular IC50 value for ~2h. A single 150 mg/kg body weight p.o. dose achieved Cmax of 1.1 µM, but plasma concentrations were below the cellular IC50 value[1].

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

Animal Model: Eight-week-old female BALB/c nude mice (MDA-MB-468 xenografts)[1]
Dosage: 150 mg/kg body weight
Administration: i.p.; once daily for 36 days
Result: Suppresses tumor growth.
Molecular Weight

718.93

Formula

C42H54N8O3
CAS No.
Appearance

Solid

Color

Light yellow to yellow

SMILES

CC(C)N(N=C1)C2=C1C(C(NCC3=C(C)C=C(C)NC3=O)=O)=CC(C4=CC=C(N=C4)N(CC5)CCN5CCNC(CC67C[C@H]8C[C@H](C[C@H](C8)C7)C6)=O)=C2
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 (173.87 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 1.3910 mL 6.9548 mL 13.9096 mL
5 mM 0.2782 mL 1.3910 mL 2.7819 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.

  • Molarity Calculator

  • Dilution Calculator

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

Mass
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Concentration
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Volume
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Molecular Weight *

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)

V1

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

    Solubility: ≥ 6.25 mg/mL (8.69 mM); Clear solution

    This protocol yields a clear solution of ≥ 6.25 mg/mL (saturation unknown).

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (62.5 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: ≥ 6.25 mg/mL (8.69 mM); Clear solution

    This protocol yields a clear solution of ≥ 6.25 mg/mL (saturation unknown).

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (62.5 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:

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
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
DMSO 1 mM 1.3910 mL 6.9548 mL 13.9096 mL 34.7739 mL
5 mM 0.2782 mL 1.3910 mL 2.7819 mL 6.9548 mL
10 mM 0.1391 mL 0.6955 mL 1.3910 mL 3.4774 mL
15 mM 0.0927 mL 0.4637 mL 0.9273 mL 2.3183 mL
20 mM 0.0695 mL 0.3477 mL 0.6955 mL 1.7387 mL
25 mM 0.0556 mL 0.2782 mL 0.5564 mL 1.3910 mL
30 mM 0.0464 mL 0.2318 mL 0.4637 mL 1.1591 mL
40 mM 0.0348 mL 0.1739 mL 0.3477 mL 0.8693 mL
50 mM 0.0278 mL 0.1391 mL 0.2782 mL 0.6955 mL
60 mM 0.0232 mL 0.1159 mL 0.2318 mL 0.5796 mL
80 mM 0.0174 mL 0.0869 mL 0.1739 mL 0.4347 mL
100 mM 0.0139 mL 0.0695 mL 0.1391 mL 0.3477 mL
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MS1943 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:

MS19432225938-17-8MS 1943MS-1943Histone MethyltransferaseApoptosistriple-negativebreastcancerTNBCproliferationfirst-in-classcytotoxicdegradermethyltransferaseapoptosisInhibitorinhibitorinhibit

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