Entinostat (MS-275)

Catalog No.S1053 Batch:S105305

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Technical Data

Formula

C21H20N4O3
Molecular Weight 376.41 CAS No. 209783-80-2
Solubility (25°C)* In vitro DMSO 75 mg/mL (199.25 mM)
Water Insoluble
Ethanol Insoluble
In vivo (Add solvents to the product individually and in order)
Clear solution
5%DMSO 40%PEG300 5%Tween80 50%ddH2O
4.0mg/ml Taking the 1 mL working solution as an example, add 50 μL of 80 mg/ml clarified DMSO stock solution to 400 μL of PEG300, mix evenly to clarify it; add 50 μL of Tween80 to the above system, mix evenly to clarify; then continue to add 500 μL of ddH2O to adjust the volume to 1 mL. The mixed solution should be used immediately for optimal results. 
* <1 mg/ml means slightly soluble or insoluble.
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.
* Room temperature shipping (Stability testing shows this product can be shipped without any cooling measures.)

Preparing Stock Solutions

Biological Activity

Description Entinostat (MS-275, SNDX-275) strongly inhibits HDAC1 and HDAC3 with IC50 of 0.51 μM and 1.7 μM in cell-free assays, compared with HDACs 4, 6, 8, and 10. Entinostat induces autophagy and apoptosis. Phase 3.
Targets
HDAC1 [2]
(Cell-free assay)		 HDAC3 [2]
(Cell-free assay)
0.51 μM 1.7 μM
In vitro MS-275 shows inhibitory to HDACs by 2'-amino group. MS-275 induces accumulation of p21WAF1/CIP1 and gelsolin in K562 cell. MS-275 could reduce S-phase cells and induce G1-phase cells in A2780 cell. MS-275 inhibits the proliferation of human tumor cell lines including A2780, Calu-3, HL-60, K562, St-4, HT-29, KB-3-1, Capan-1, 4-1St and HCT-15 with IC50 from 41.5 nM to 4.71 μM, which due to HAD-inhibition. [1] MS-275 is not sensitive to other HDACs (4, 6, 8 and 10) with IC50 about/above 100 μM. [2] MS-275 shows great inhibition to human leukemia and lymphoma cells, including U937, HL-60, K562, and Jurkat. MS-275 also decreases expression of cyclin D1 and the antiapoptotic proteins Mcl-1 and XIAP. [3]
In vivo MS-275 exhibits great antitumor activity against human tumor xenografts except HCT-15 at 49 mg/kg. [1] MS-275 demonstrates promising therapeutic potential in both solid and hematologic malignancies, as well as regulation of physiologic and aberrant gene expression. [4] MS-275, combination with IL-2, has great antitumor activity to renal cell carcinoma xenograft model, which due to decreased T regulatory cells and increased splenocytes. [5]

Protocol (from reference)

Kinase Assay:

[6]
  • Standard HDAC Assays

    Rat liver enzyme is diluted 1:6 with HDAC buffer. Recombinant human HDACs are diluted 1:4 in HDAC buffer. For standard HDAC assays, 60 μL of HDAC buffer is mixed with 10 μL of diluted enzyme solution at 30 °C. The HDAC reaction is started by adding 30 μL substrate solution in HDAC buffer followed by 30 min of incubation at 30 °C. The reaction is stopped by adding 100 μL trypsin solutions (10 mg/ml trypsin in 50 mM Tris-HCl [pH 8.0], 100 mM NaCl, 2 μM TSA). After a 20 min incubation period at 30 °C, the release of AMC is monitored by measuring the fluorescence at 460 nm (λex = 390 nm). Fluorescence intensity is calibrated using free AMC. For standard time course experiments, 20 pmol of substrate is used in the initial 100 μL HDAC reaction. Km and Vmax values are determined by measuring the fluorescence AMC generated by enzymatic cleavage of 2–50 pmol of substrate. The experimental data are analyzed using a Hanes plot. The AMC signals are recorded against a blank with buffer and substrate but without the enzyme.
Cell Assay:

[2]
  • Cell lines

    A2780, Calu-3, HL-60, K562, St-4, HT-29, KB-3-1, Capan-1, 4-1St and HCT-15 cells

  • Concentrations

    ~ 10 μM

  • Incubation Time

    3 days

  • Method

    Cancer cells (5 × 103) are seeded into each well of 96-well plates and cultured with graded concentrations of MS-275 for 3 days. The cells are stained with 0.1 mg/mL neutral red for 1 hour in a CO2-incubator, and, after aspiration of the medium, OD540 of the neutral red solubilized with 50 μL of ethanol and 150 μL of 0.1 M Na2HPO4 is measured. The IC50 value is determined by plotting growth inhibition of the cells against the logarithm of the drug concentration.
Animal Study:

[1]
  • Animal Models

    A2780, HT-29, HTC-15, KB-3-1, 4-1St, St-4, Capan-1 and Calu-3 cells are injected subcutaneously into the flank of nude mice.

  • Dosages

    12.3, 24.5 and 49 mg/kg

  • Administration

    Administered orally once daily 5 days per week for 4 weeks

Customer Product Validation

Data from [Data independently produced by PLoS Biol, 2014, 12, e1001758]

Data from [Biochem Biophys Res Commun, 2014, 10.1016/j.bbrc.2014.01.184]

Data from [Biochem Biophys Res Commun, 2014, 10.1016/j.bbrc.2014.01.184]

Data from [Data independently produced by PLoS One, 2013, 8, e74930]

Selleck's Entinostat (MS-275) has been cited by 460 publications

Orthogonal proteogenomic analysis identifies the druggable PA2G4-MYC axis in 3q26 AML [ Nat Commun, 2024, 15(1):4739] PubMed: 38834613
Unbiased screening identifies regulators of cell-cell adhesion and treatment options in pemphigus [ Nat Commun, 2024, 15(1):8044] PubMed: 39271654
The CoREST repressor complex mediates phenotype switching and therapy resistance in melanoma [ J Clin Invest, 2024, 134(6)e171063] PubMed: 38300709
Epigenetic regulation of cell state by H2AFY governs immunogenicity in high-risk neuroblastoma [ J Clin Invest, 2024, e175310] PubMed: 39255035
Inhibition of HDAC activity directly reprograms murine embryonic stem cells to trophoblast stem cells [ Dev Cell, 2024, S1534-5807(24)00326-5] PubMed: 38823394
H3K9 lactylation in malignant cells facilitates CD8+ T cell dysfunction and poor immunotherapy response [ Cell Rep, 2024, 43(9):114686] PubMed: 39216002
A functional personalised oncology approach against metastatic colorectal cancer in matched patient derived organoids [ NPJ Precis Oncol, 2024, 8(1):52] PubMed: 38413740
HDAC1 and FOXK1 mediate EGFR-TKI resistance of non-small cell lung cancer through miR-33a silencing [ J Transl Med, 2024, 22(1):793] PubMed: 39198847
Romidepsin and afatinib abrogate JAK-STAT signaling and elicit synergistic antitumor effects in cutaneous T-cell lymphoma [ J Invest Dermatol, 2024, S0022-202X(23)03210-4] PubMed: 38219917
Combined inhibition of RAD51 and CHK1 causes synergistic toxicity in cisplatin resistant cancer cells by triggering replication fork collapse [ Int J Cancer, 2024, 156(2):389-402.] PubMed: 39239809

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SHIPPING AND STORAGE
Selleck products are transported at room temperature. If you receive the product at room temperature, please rest assured, the Selleck Quality Inspection Department has conducted experiments to verify that the normal temperature placement of one month will not affect the biological activity of powder products. After collecting, please store the product according to the requirements described in the datasheet. Most Selleck products are stable under the recommended conditions.

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