Inhibitor Expert (Inhibitors, Compound Libraries)



Technical Data

Molecular Weight 362.4 Storage powder


in solvent
CAS No. 1396841-57-8 Synonyms N/A
Chemical Name 2-Propenamide, N-(2-amino-4-fluorophenyl)-3-[1-[(2E)-3-phenyl-2-propen-1-yl]-1H-pyrazol-4-yl]-, (2E)-
Solubility (25°C) * In vitro DMSO 72 mg/mL (198.67 mM)
Water Insoluble
Ethanol Insoluble
In vivo 2% DMSO+30% PEG 300+5% Tween 80+ddH2O 5mg/mL
* <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.

Biological Activity

Description RGFP966 is an HDAC3 inhibitor with IC50 of 0.08 μM in cell-free assay, exhibits > 200-fold selectivity over other HDAC.
HDAC3 [1]
(Cell-free assay)
80 nM
In vitro RGFP966 is a slow-on/slow-off, competitive tight-binding HDAC inhibitor, with an IC50 of 0.08μM for HDAC3 and no effective inhibition of any other HDAC at concentrations up to 15μM. [1] RGFP966 treatment on two CTCL cell lines for 24 hours prior to western blot analysis resulted in increased acetylation at H3K9/K14, H3K27, and H4K5, but not H3K56ac. RGFP966 decreases cell growth in CTCL (cutaneous T cell lymphoma) cell lines due to increased apoptosis that is associated with DNA damage and impaired S phase progression. RGFP966 causes a significant reduction in DNA replication fork velocity within the first hour of drug treatment. [2]
In vivo RGFP966 treatment (10 mg/kg) enhances long-term memory for object memory. RGFP966 (3 or 10 mg/kg, s.c.) facilitates extinction and prevents reinstatement of cocaine- conditioned place preference. [1]

Protocol (Only for Reference)

Kinase Assay: [1]
Deacetylation assays Deacetylation assays are based on the homogenous fluorescence release assay. Purified recombinant enzymes are incubated with serial-diluted inhibitors at the concentrations indicated in the figures, with pre-incubation times ranging from 0 to 3 hours, in the standard HDAC buffer. Acetyl-Lys(Ac)-AMC substrate (at 10 μM, corresponding to the Km for both HDAC1 and HDAC3) is added after the pre-incubation period. The reaction is allowed to run for 1 hour. The trypsin peptidase developer, at final concentration of 5mg/ml, is added after 1 hour, and the fluorescence emission is then measured using a Tecan M200 96-well plate reader.
Cell Assay: [2]
Cell lines HH and Hut78 CTCL cell lines
Concentrations ~10μM
Incubation Time 24 to 72 h
Method Cells are counted and split into T25 (Corning) flasks at 26105 cells/mL. Cells are then treated with DMSO, or HDIs once at hour 0. 100 ml aliquots are taken in triplicate from each flask at 0 hr, 24 hrs, 48 hrs, and 72 hrs after treatment, distributed into a flat bottom 96-well plate, and 10 ml of alamar blue added to each well. After a 4 hr incubation, fluorescence is measured using the Biotek Synergy MX Microplate Reader.
Animal Study: [1]
Animal Models Mouse
Formulation dissolved in DMSO and diluted in a vehicle of 30% (wt/vol) hydroxypropyl-β-cyclodextrin and 100mM sodium acetate (pH 5.4).
Dosages 10 mg/kg, 10.0 mL/kg
Administration s.c.


Customer Product Validation

Data from [Data independently produced by , , Front Mol Neurosci, 2016, 9:131]

Representative images of Fluoro-Jade C staining in each group. The histogram shows the numbers of degenerating neurons in the cortex 24 h (C) or 7 days (D) after MCAO (over 30 slices from five rats per group). ∗∗p < 0.01, ∗∗∗p < 0.001 versus MCAO group, ANOVA. Functional outcomes were assessed using the neurological deficits score (day 1, 4, and 7 after MCAO)

Data from [Data independently produced by , , J Immunol, 2015, 195(11):5421-31]

BMDC were stimulated for 7 h with LPS plus SAHA (4 μM), M344 (0.5 μM), TSA (100 nM), PCI-34051 (10 μM), valproate (Val; 5 mM), PD106 (10 μM), MS-275 (5 μM), sirtuin inhibitor (10 μM), RGFP966 (10 μM), MC1568 (10 μM), droxinostat (drox; 10 μM), CAY10603 (500 nM), or sodium butyrate (butyrate) (5 mM). (D) IL-1β concentrations were determined in the supernatants by ELISA.

RGFP966 has been referenced in publications.



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Chemical Structure

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