1. Cell Cycle/DNA Damage
  2. HDAC
  3. M344

M344 (Synonyms: D 237; MS 344)

Cat. No.: HY-13506 Purity: 99.36%
Handling Instructions

M344 (D 237) is an inhibitor of histone deacetylase (IC50=100 nM) and an inducer of terminal cell fifferentiation.

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

M344 Chemical Structure

M344 Chemical Structure

CAS No. : 251456-60-7

Size Price Stock Quantity
10 mM * 1 mL in DMSO USD 66 In-stock
Estimated Time of Arrival: December 31
5 mg USD 60 In-stock
Estimated Time of Arrival: December 31
10 mg USD 102 In-stock
Estimated Time of Arrival: December 31
50 mg USD 432 In-stock
Estimated Time of Arrival: December 31
100 mg   Get quote  
200 mg   Get quote  

* Please select Quantity before adding items.

Customer Review

Based on 1 publication(s) in Google Scholar

Top Publications Citing Use of Products

Publications Citing Use of MCE M344

  • Biological Activity

  • Protocol

  • Purity & Documentation

  • References

  • Customer Review


M344 (D 237) is an inhibitor of histone deacetylase (IC50=100 nM) and an inducer of terminal cell fifferentiation.

IC50 & Target[1]


100 nM (IC50)

In Vitro

M344 is a potential histone deacetylase (HDAC) inhibitor. BRCA1 mRNA levels are determined by RT-PCR following exposure to increasing concentrations of the HDAC inhibitor M344 alone and in combination with Cisplatin in all 6 cell lines evaluated in this study. With increasing concentrations of M344, there is a dose dependant decrease in BRCA1 mRNA and treatment with both 1 and 5 μM concentrations of M344 resulting in a significant decrease in BRCA1 expression in all cell lines examined. M344 in combination with Cisplatin leads to a decrease in BRCA1 mRNA expression as compared to Cisplatin treatment alone in all cell lines with the exception of A2780s, which is recognized as having potent cytotoxicity to Cisplatin. In the MCF7 cell line, BRCA1 is down regulated at physiological doses of M344 (0.5 μM and 1 μM) but M344 does not have the same inhibitory effect on BRCA1 at the 5.0 μM dose. Co-treatment with Cisplatin and increasing concentrations of M344 reduces BRCA1 protein levels in all breast and ovarian cell lines examined[2].

Molecular Weight









Room temperature in continental US; may vary elsewhere.

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

DMSO : ≥ 100 mg/mL (325.32 mM)

*"≥" means soluble, but saturation unknown.

Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 3.2532 mL 16.2660 mL 32.5320 mL
5 mM 0.6506 mL 3.2532 mL 6.5064 mL
10 mM 0.3253 mL 1.6266 mL 3.2532 mL
*Please refer to the solubility information to select the appropriate solvent.
In Vivo:
  • 1.

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

    Solubility: ≥ 2.5 mg/mL (8.13 mM); Clear solution

  • 2.

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

    Solubility: ≥ 2.5 mg/mL (8.13 mM); Clear solution

  • 3.

    Add each solvent one by one:  10% DMSO    90% corn oil

    Solubility: ≥ 2.5 mg/mL (8.13 mM); Clear solution

*All of the co-solvents are provided by MCE.
Cell Assay

The A2780s and A2780cp cell lines, the T-47D and OVCAR-4 cell lines. and the MCF7 and HCC1937cell lines, are maintained in Dulbecco's-MEM supplemented with 10% fetal bovine serum and 100 μg/mL penicillin-streptomycin. Unless otherwise described, cells are treated for 24 hrs with 2 μg/mL Cisplatin alone, and in combination with the HDAC inhibitor M344 at concentrations of 0.5, 1.0, or 5.0 μM. Phase contrast images are collected using the 10× objective of an Eclipse TE2000-U. Cell viability is measured by the MTT rapid colorimetric assay. Approximately 4,500 cells are seeded into each well of a 96-well flat bottom plate. The cells are incubated overnight to allow for cell attachment. Cells are then treated with Cisplatin in concentrations of 0-8 μg/mL alone or in combination with 1 μM of the HDAC inhibitor, M344. Forty eight hours following treatment, 42 μL of a 5 mg/mL MTT substrate solution in phosphate buffered saline (PBS) is added and incubated for up to 4 hrs at 37°C. The resulting violet formazan precipitate is solubilized by the addition of 82 μL of a 0.01 M HCl/10% SDS solution and plates are incubated overnight at 37°C. The plates are then analyzed on an MRX Microplate Reader at 570 nm to determine the optical density of the samples[2].

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

  • No file chosen (Maximum size is: 1024 Kb)
  • If you have published this work, please enter the PubMed ID.
  • Your name will appear on the site.
  • Molarity Calculator

  • Dilution Calculator

The molarity calculator equation

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

Mass   Concentration   Volume   Molecular Weight *
= × ×

The dilution calculator equation

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

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
× = ×
C1   V1   C2   V2


M344D 237MS 344M 344M-344D237D-237MS344MS-344HDACHistone deacetylasesInhibitorinhibitorinhibit

Your Recently Viewed Products:

Inquiry Online

Your information is safe with us. * Required Fields.

Product name



Applicant name *


Email address *

Phone number *


Organization name *

Country or Region *


Requested quantity *


Bulk Inquiry

Inquiry Information

Product name:
Cat. No.:
MCE Japan Authorized Agent: