Dacinostat (LAQ-824; NVP-LAQ-824)

Alias: NVP-LAQ824; NVP-LAQ-824; NVP LAQ824; LAQ 824; LAQ824; LAQ-824; Dacinostat
Cat No.:V0280 Purity: ≥98%
Dacinostat (formerly LAQ824; NVP-LAQ824) is a novel, potent and hydroxamate-based inhibitor of histone deacetylase (HDAC) with potential anticancer activity.
Dacinostat (LAQ-824; NVP-LAQ-824) Chemical Structure CAS No.: 404951-53-7
Product category: HDAC
This product is for research use only, not for human use. We do not sell to patients.
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Purity & Quality Control Documentation

Purity: ≥98%

Product Description

Dacinostat (formerly LAQ824; NVP-LAQ824) is a novel, potent and hydroxamate-based inhibitor of histone deacetylase (HDAC) with potential anticancer activity. It exhibits strong anti-proliferative activity in vitro against a variety of cancer cell lines, including H23 and H460 cell lines, and inhibits HDAC with an IC50 of 32 nM.

Biological Activity I Assay Protocols (From Reference)
Targets
HDAC1 ( IC50 = 9 nM ); HDAC ( IC50 = 32 nM )
ln Vitro

In vitro activity: LAQ824 stimulates the p21 promoter at 50% of the maximal promoter activation (AC50) of 0.30 μM, thereby initiating the expression of the gene encoding the p21 cell cycle inhibitor. With IC50 values of 0.15 μM and 0.01 μM, respectively, LAQ824 suppresses the growth of H1299, a non-small cell lung carcinoma line, and HCT116, a colon cancer cell line. Its antiproliferative action is specific to the tumor cell lines, causing only growth arrest in normal fibroblasts. Moreover, LAQ824 causes the A549 cells' p21 protein to rise in a dose-dependent manner and the Rb tumor suppressor's hypophosphorylated state to rise.[1] The IL-10 gene promoter undergoes chromatin modifications caused by LAQ824 that inhibit IL-10 production in BALB/c murine macrophages and increase the recruitment of the transcriptional repressors PU.1 and HDAC11.[2]

ln Vivo
LAQ824 treatment at 100 mg/kg inhibits tumor growth in HCT116 and human colon tumor xenografts in nude mice in a dose-dependent manner without causing general cytotoxicity.[1]
Enzyme Assay
Using the Q Sepharose Fast Flow column in ion exchange chromatography, HDAC enzymes are partially isolated from H1299 cell lysate. By using cdk2 polyclonal antibody or cdk1/cdc2 monoclonal antibody for immunoprecipitation, 500 mg of total cell lysate is used to extract enzyme complexes. Re-suspended immunoprecipitates are mixed with 1 μg of pRb recombinant protein substrate (cdk2) or 10 mL of H1 histone mixture containing 20 μg of substrate (cdc2) in kinase buffer (50 mM Hepes, pH 8, 10 mM MgCl2, 2.5 mM EDTA, 1 mM dithiothreitol, 20 mM ATP, 10 mM β-glycerophosphate, 0.1 mM NaVO4, 1 mM sodium fluoride, 50 mM ATP, 10 μCi of [γ-32P]ATP). Electrophoresis is used to separate phosphorylated Rb and H1 histones, and a PhosphorImager is used to quantify the results.
Cell Assay
The 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxy-phenyl)-2-(4-sulfonyl)-2H-tetrazolium assay is a published procedure that is adapted to measure cell proliferation. The cells are cultivated in RPMI 1640 with 10% FBS after being seeded in 12-well dishes. TSA at different concentrations—up to 1,000 ng/mL—is present during cell culture. Trypan blue dye exclusion is used to measure the viable cell counts in a Nesbauer-type hemocytometer at 0 hours, 24 hours, and 48 hours in order to investigate the growth inhibition caused by TSA. To the RPMI 1640 medium, the same volume of ethanol is added as in the control experiment. Every experiment is carried out in triplicate and is repeated three times. Each experimental well has its average background value (treatment with medium alone) deducted; values are averaged for each compound dilution in triplicate. The percentage of growth is computed using the following formulas: If X>T0, then %Growth=(X-T0)/(GC-T0)*100; if X0, then %Growth=(X-T0)/T0*100. where X is the average value of compound-treated cells (in triplicate)-background, GC is the average value of untreated cells (in triplicate) − background, and T0 is the average value of T0 − background. In order to predict the concentration of compounds at 50% inhibition, the "% Growth" is plotted against compound concentration and used to calculate the IC50 using linear regression techniques between data points.
Animal Protocol
Using outbred athymic (nu/nu) female mice, the studies are carried out on-site. Following metofane anesthesia, mice receive a subcutaneous injection of a 100 μL cell suspension containing 1×106 HCT116 cells into their right axillary (lateral) region. An estimated volume of 100–400 mm3 is permissible for tumors. Now, mice exhibiting tumors of a similar size range and acceptable morphology (non-necrotic) are chosen and divided into six-groups for the investigations. D5W is added to a stock solution made by dissolving NVP-LAQ824 in DMSO. This solution is then further diluted to a final DMSO concentration of 10% right before injection. The substance is injected intraperitoneally (IV) into the tail vein of tumor-bearing mice. For a total of 15 doses, NVP-LAQ824 is dosed once daily, five days a week. 5-Fluorouracil is given once a week for a total of three doses at a dose of 100 mg/kg in 0.9% saline. The vehicle is used to treat the control groups. Animals with tumors are taken out at the designated intervals.
References

[1]. Selective growth inhibition of tumor cells by a novel histone deacetylase inhibitor, NVP-LAQ824. Cancer Res. 2004 Jan 15;64(2):689-95.

[2]. Conformational refinement of hydroxamate-based histone deacetylase inhibitors and exploration of 3-piperidin-3-ylindole analogues of dacinostat (LAQ824). J Med Chem. 2010 Apr 8;53(7):2952-63.

[3]. Deacetylase inhibitors modulate proliferation and self-renewal properties of leukemic stem and progenitor cells. Cell Cycle. 2012 Sep 1;11(17):3219-26.

These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C22H25N3O3
Molecular Weight
379.46
Exact Mass
379.19
Elemental Analysis
C, 69.64; H, 6.64; N, 11.07; O, 12.65
CAS #
404951-53-7
Related CAS #
404951-53-7
Appearance
Solid powder
SMILES
C1=CC=C2C(=C1)C(=CN2)CCN(CCO)CC3=CC=C(C=C3)/C=C/C(=O)NO
InChi Key
BWDQBBCUWLSASG-MDZDMXLPSA-N
InChi Code
InChI=1S/C22H25N3O3/c26-14-13-25(12-11-19-15-23-21-4-2-1-3-20(19)21)16-18-7-5-17(6-8-18)9-10-22(27)24-28/h1-10,15,23,26,28H,11-14,16H2,(H,24,27)/b10-9+
Chemical Name
(E)-N-hydroxy-3-[4-[[2-hydroxyethyl-[2-(1H-indol-3-yl)ethyl]amino]methyl]phenyl]prop-2-enamide
Synonyms
NVP-LAQ824; NVP-LAQ-824; NVP LAQ824; LAQ 824; LAQ824; LAQ-824; Dacinostat
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)
DMSO: ~76 mg/mL (~200.3 mM)
Water: <1 mg/mL
Ethanol: <1 mg/mL
Solubility (In Vivo)
Solubility in Formulation 1: ≥ 2.5 mg/mL (6.59 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL.
Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution.

Solubility in Formulation 2: ≥ 2.5 mg/mL (6.59 mM) (saturation unknown) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly.
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.

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Solubility in Formulation 3: ≥ 2.5 mg/mL (6.59 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly.


Solubility in Formulation 4: 1% DMSO+30% polyethylene glycol+1% Tween 80: 30mg/mL

 (Please use freshly prepared in vivo formulations for optimal results.)
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 2.6353 mL 13.1766 mL 26.3532 mL
5 mM 0.5271 mL 2.6353 mL 5.2706 mL
10 mM 0.2635 mL 1.3177 mL 2.6353 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.

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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.
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Biological Data
  • LAQ824 (Dacinostat)

    Phenotypic and functional changes in macrophages treated with the HDI LAQ824.



    LAQ824 (Dacinostat)

    Production of pro-inflammatory mediators by macrophages treated with HDI LAQ824.J Immunol.2011 Apr 1;186(7):3986-96.



    LAQ824 (Dacinostat)
    LAQ824 inhibits IL-10 production by macrophages from tumor bearing mice.
  • LAQ824 (Dacinostat)

    PEMs treated with LAQ824 effectively activate antigen-specific CD4+ T-cells and restore the function of anergized T-cells.J Immunol.2011 Apr 1;186(7):3986-96.




    LAQ824 (Dacinostat)

    Production of IL-10 and IL-12 by PEMs treated with the pan-HDIs LBH589 or TSA, or with the class I selective HDI MS-275.
  • LAQ824 (Dacinostat)

    Changes in IL-10 mRNA expression and histone acetylation of the IL-10 gene promoter in PEMs treated with LAQ824.J Immunol.2011 Apr 1;186(7):3986-96.
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