Home Cytoskeletal Signaling HDAC inhibitor - Apoptosis related activator Pracinostat (SB939)

Pracinostat (SB939)

Catalog No.S1515

For research use only.

Pracinostat (SB939) is a potent pan-HDAC inhibitor with IC50 of 40-140 nM with exception for HDAC6. It has no activity against the class III isoenzyme SIRT I. Pracinostat (SB939) induces apoptosis in tumor cells. Phase 2.

Pracinostat (SB939) Chemical Structure

CAS No. 929016-96-6

Selleck's Pracinostat (SB939) has been cited by 21 publications

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Biological Activity

Description Pracinostat (SB939) is a potent pan-HDAC inhibitor with IC50 of 40-140 nM with exception for HDAC6. It has no activity against the class III isoenzyme SIRT I. Pracinostat (SB939) induces apoptosis in tumor cells. Phase 2.
Features A new histone deacetylase inhibitor based on hydroxamic acid, with improved physicochemical, pharmaceutical, and pharmacokinetic properties.
Targets
HDAC10 [1]
(Cell-free assay)		 HDAC3 [1]
(Cell-free assay)		 HDAC5 [1]
(Cell-free assay)		 HDAC1 [1]
(Cell-free assay)		 HDAC4 [1]
(Cell-free assay)		 Click to View More Targets
40 nM 43 nM 47 nM 49 nM 56 nM
In vitro

SB939 has a 100-fold greater selectivity for HDACs than for Zn-binding non-HDAC enzymes, receptors, and ion channels. SB939 is a potent inhibitor of HDAC class I isoenzymes, HDAC1, HDAC2, HDAC3 and HDAC8 with the IC50 values ranging from 43 nM to 140 nM. SB939 inhibits HDAC class II isoenzymes , HDAC4, HDAC5, HDAC7, HDAC9 and HDAC10 significantly with the IC50 values ranging from 40 nM to 137 nM, with the exception of HDAC6 which shows IC50 of 1008 nM. It markedly inhibits HDAC11 of the HDAC class IV enzymes with IC50 of 93 nM, but shows no inhibitory activity against SIRT 1 of the class III HDACs. SB939 shows significant antiproliferative activity against a wide variety of tumor cell lines, especially Leukemia cells and cutaneous T-cell Lymphoma cells with IC50 values ranging from 50 nM (H9 cells) to 170 nM (HEL92.1.7 cells). [1]
Cell Data
Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID
MCF7 cells M4rTXnBzd2yrZnXyZZRqd25iYYPzZZk> NUjB[ZZ6PDhiaB?= NGXEUGFCdnSrcILvcIln\XKjdHn2[UBi[3Srdnn0fUBi\2GrboP0JIh2dWGwIF3DSlch[2WubIOgZYZ1\XJiNEigbJJ{KGK7IIP1cIZwemixZHHtbY5mKEJiYYPzZZktKEeLNUC9NE4yPyEQvF2= MXW8ZUB1[XKpZYS9K39jdGGwazegbJJm\j1paIT0dJM7Ny:ydXLt[YQvdmOkaT7ucI0vdmmqLnfvek8zPDFzOUW1OUc,OjRzMUm1OVU9N2F-
NCI-H460 cells Ml2zVJJwdGmoZYLheIlwdiCjc4PhfS=> M4PpblQ5KGh? NV;VV29pSW62aYDyc4xq\mW{YYTpeoUh[WO2aY\peJkh[WejaX7zeEBpfW2jbjDOR2kuUDR4MDDj[YxteyCjZoTldkA1QCCqcoOgZpkhe3WuZn;ybI9l[W2rbnWgRkBie3OjeTygS2k2OD1yLkKyJO69VQ>? M1G5WlxiKHSjcnfleF0oZ2KuYX7rK{BpemWoPTfoeJRxezpxL4D1Zo1m\C6wY3LpMo5tdS6waXiu[493NzJ2MUG5OVU2Lz5{NEGxPVU2PTxxYU6=
HCT116 cells MX3Qdo9tcW[ncnH0bY9vKGG|c3H5 NVvKS3hVPDhiaB?= M{HOTGFvfGmycn;sbYZmemG2aY\lJIFkfGm4aYT5JIFo[Wmwc4SgbJVu[W5iSFPUNVE3KGOnbHzzJIFnfGW{IES4JIhzeyCkeTDzeYxnd3Kqb3ThcYlv\SCEIHHzd4F6NCCJSUWwQVAvOjRizszN M2ToRlxiKHSjcnfleF0oZ2KuYX7rK{BpemWoPTfoeJRxezpxL4D1Zo1m\C6wY3LpMo5tdS6waXiu[493NzJ2MUG5OVU2Lz5{NEGxPVU2PTxxYU6=
MDA-MB-435 cells M2TTUHBzd2yrZnXyZZRqd25iYYPzZZk> NH70[Ws1QCCq NEj5VnZCdnSrcILvcIln\XKjdHn2[UBi[3Srdnn0fUBi\2GrboP0JIh2dWGwIF3ERU1OSi12M{WgZ4VtdHNiYX\0[ZIhPDhiaILzJIJ6KHO3bH\vdohw\GGvaX7lJGIh[XO|YYmsJGdKPTB;MD60PEDPxE1? MoP6QIEhfGG{Z3X0QUdg[myjbnunJIhz\WZ;J3j0eJB{Qi9xcIXicYVlNm6lYnmucoxuNm6raD7nc5YwOjRzMUm1OVUoRjJ2MUG5OVU2RC:jPh?=
OVCAR5 cells NFf6XVFRem:uaX\ldoF1cW:wIHHzd4F6 M{S5elQ5KGh? NHTCVZFCdnSrcILvcIln\XKjdHn2[UBi[3Srdnn0fUBi\2GrboP0JIh2dWGwIF;WR2FTPSClZXzsd{Bi\nSncjC0PEBpenNiYomgd5Vt\m:{aH;kZY1qdmViQjDhd5NigSxiR1m1NF0xNjZzIN88US=> NWj6ZlF7RGFidHHy[4V1RSehYnzhcosoKGi{ZX[9K4h1fHC|Oj:vdJVjdWWmLn7jZokvdmyvLn7pbE5od3ZxMkSxNVk2PTVpPkK0NVE6PTV3PD;hQi=>
HepG2 MVTBcpRqdWGuYYLpZYwh[XO|YYm= NWrzZ4E4SW62aX3hcIFzcWGuIHHjeIl3cXS7IHHnZYlve3RiZYjvMYVzgXSqcn;jfZRq[yCob4LtJI9nKFCuYYPtc4RqfW1iYnXy[4hmcSCrbn\lZ5Rm\CCrbjDoeY1idiCKZYDHNkBk\WyuczygTWM2OCB;IECuNVUh|ryPLh?= NGjsbZA9[SC2YYLn[ZQ:L1:kbHHub{chcHKnZk2nbJR1eHN8Lz;weYJu\WRwbnPibU5vdG1wbnnoModwfi9{NEmwOFk3Pyd-MkS5NFQ6Pjd:L3G+
HepG2 M4i2cGFvfGmybHHzcY9lcWGuIHHzd4F6 MlrYOVMhcHK| MlnIRY51cXCuYYPtc4Rq[WxiYXP0bZZqfHliYXfhbY5{fCCneH;ldpl1cHKxY4n0bYMue3SjZ3Wgc4YhWGyjc33v[Il2dSCkZYLnbIVqKEGQS1GgbY5n\WO2ZXSgbY4hcHWvYX6gTIVxTzJiY3XscJMh[W[2ZYKgOVMhcHK|IHL5JGRCWElic4ThbY5qdmdvYnHz[YQhdWW2aH;kMEBKSzVyIE2gNE4yPSEQvF2u NGqzRlY9[SC2YYLn[ZQ:L1:kbHHub{chcHKnZk2nbJR1eHN8Lz;weYJu\WRwbnPibU5vdG1wbnnoModwfi9{OEK0NVEyOid-MkiyOFEyOTJ:L3G+
Sf9 NFPYOHRHfW6ldHnvckBie3OjeR?= MV:yJIhzew>? MYLJcohq[mm2aX;uJI9nKHKnY3;tZolv[W62IHj1cYFvKEiGQVOtNkBmgHC{ZYPz[YQhcW5iYnHjeYxwfmm{dYOgbY5n\WO2ZXSgbY5{\WO2IGPmPUBk\WyuczD1d4lv\yCIbIXvdkBl\SCOeYOgZZMhe3Wkc4TyZZRmKHC{ZXnuZ5Vj[XSnZDDmc5IhOiCqcoOg[o9tdG:5ZXSgZpkhe3Wkc4TyZZRmKGGmZHn0bY9vKG2nYYP1doVlKGGodHXyJFExKG2rboOgZpkh\my3b4Lld4NmdmOnIHHzd4F6NCCNaTC9JFAvODF4IN88UU4> MX:8ZUB1[XKpZYS9K39jdGGwazegbJJm\j1paIT0dJM7Ny:5d4eu[YJqNmGlLoXrM4Np\W2kbD;jc41xd3WwZG;y[ZBwenShY3Hy[E9EUEWPQlyxPFUyQTR|Lze+R4hGVUKOPD;hQi=>
HEK293-F M{LDRWZ2dmO2aX;uJIF{e2G7 NXLiZlZTOiCqcoO= MkHjTY5pcWKrdHnvckBw\iC{ZXPvcYJqdmGwdDDoeY1idiCKRFHDMVgh\XiycnXzd4VlKGmwIFjFT|I6Oy2IIHPlcIx{KHW|aX7nJGZtfW:{IHTlJGx6eyCjczDzeYJ{fHKjdHWgdJJmcW6ldXLheIVlKG[xcjCyJIhzeyCob3zsc5dm\CCkeTDzeYJ{fHKjdHWgZYRlcXSrb36gcYVie3W{ZXSgZYZ1\XJiMUCgcYlveyCkeTDmcJVwemW|Y3XuZ4Uh[XO|YYmsJGtqKD1iMD6wNVYh|ryPLh?= MW[8ZUB1[XKpZYS9K39jdGGwazegbJJm\j1paIT0dJM7Ny:5d4eu[YJqNmGlLoXrM4Np\W2kbD;jc41xd3WwZG;y[ZBwenShY3Hy[E9EUEWPQlyxPFUyQTR|Lze+R4hGVUKOPD;hQi=>
Sf9 M2q5eWZ2dmO2aX;uJIF{e2G7 MWWyJIhzew>? MlvwTY5pcWKrdHnvckBw\iC{ZXPvcYJqdmGwdDDoeY1idiCKRFHDMVEh\XiycnXzd4VlKGmwIHLhZ5Vtd3[rcoXzJIlv\mWldHXkJIlve2WldDDT[lkh[2WubIOgeZNqdmdiRnz1c5Ih\GViTInzJIF{KHO3YoP0doF1\SCycnXpcoN2[mG2ZXSg[o9zKDJiaILzJIZwdGyxd3XkJIJ6KHO3YoP0doF1\SCjZHTpeIlwdiCvZXHzeZJm\CCjZoTldkAyOCCvaX7zJIJ6KG[udX;y[ZNk\W6lZTDhd5NigSxiS3mgQUAxNjBzNjFOwG0v M4TVN|xiKHSjcnfleF0oZ2KuYX7rK{BpemWoPTfoeJRxezpxL4f3e{5m[mlwYXOueYsw[2inbXLsM4NwdXCxdX7kY5JmeG:{dG;jZZJlN0OKRV3CUFE5PTF7NEOvK|5EcEWPQly8M4E,
Click to View More Cell Line Experimental Data
Assay
Methods Test Index PMID
Western blot p-JAK2 / JAK2 / p-STAT5 / STAT5 / p-FLT3 / FLT3 22829971
In vivo Administration of SB939 (25 mg/kg to 100 mg/kg) displays a dose-dependent antitumor efficacy in a xenograft mice model of human colorectal cancer (HCT-116). This is approximately twice as efficacious as SAHA: SB939 causing a tumor growth inhibition of 94% versus 48% by SAHA with both at the maximum tolerated dose. Oral administration of SB939 at a dose of 50 mg/kg or 75 mg/kg in the APCmin genetic mice model of early-stage colon cancer markedly reduces the number of tumors , decreases cumulative hemocult scores and increases hematocrit values more effectively than 5-fluorouracil. [1]

Protocol (from reference)

Kinase Assay:[1]
  • HDAC enzyme assay:

    All recombinant HDAC enzymes, with the exception of SIRT1, are cloned and expressed in S*BIO. The reaction mix containing 2.5 or 5 μL of the HDAC isoenzyme, assay buffer (25 mM Tris-HCl, pH 7.5; 137 mM NaCl; 2.7 mM KCl, 1 mM MgCl2 and 1 mg/mL BSA), different concentrations of SB939, and the fluorogenic deacetylase substrate Flour de LysTM in a total reaction volume of 33 μL is incubated at room temperature for 2 hours. 16 μL of Flour de LysTM developer is added and incubated for an additional 10 minutes. The emitted light is measured at 460 nm in a microplate reader. IC50 values are generated using the XLfit software.
Cell Research:[1]
  • Cell lines: HCT116, A2780, ACHN, MCF7, HL-60, et al.
  • Concentrations: Dissolved in DMSO (stock concentration, 10 mM), final concentrations 1.5 nM to 100 μM
  • Incubation Time: 96 hours
  • Method: Cells are seeded in 96-well plates in the log growth phase at a predetermined optimal density, and rested for 24 hours (adherent cells) or 2 hours (suspension cells), respectively. They are exposed to different concentrations of SB939 for 96 hours. Cell proliferation assays are done using either the CyQUANT cell proliferation assay kit for adherent cells or the CellTiter96 Aqueous One solution cell proliferation kit for suspension cells.
Animal Research:[1]
  • Animal Models: BALB/c nude mice bearing HCT-116 human colon cancer xenografts, Male and APCmin mice
  • Dosages: 25, 50, 75, or 100 mg/kg
  • Administration: Oral gavage once daily

Solubility (25°C)

In vitro

In vivo

Add solvents to the product individually and in order
(Data is from Selleck tests instead of citations):
1% DMSO+30% polyethylene glycol+1% Tween 80
For best results, use promptly after mixing.

 30 mg/mL

Chemical Information

Molecular Weight 358.48
Formula

C20H30N4O2
CAS No. 929016-96-6
Storage 3 years -20°C powder
2 years -80°C in solvent
Smiles CCCCC1=NC2=C(N1CCN(CC)CC)C=CC(=C2)C=CC(=O)NO

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Clinical Trial Information

NCT Number Recruitment Interventions Conditions Sponsor/Collaborators Start Date Phases
NCT02118909 Completed Drug: Pracinostat|Drug: Itraconazole|Drug: Ciprofloxacin Healthy Volunteers|Non-smokers Helsinn Healthcare SA May 2014 Phase 1
NCT02058784 Completed Drug: pracinostat Healthy Volunteers|Moderate to Heavy Smokers|Non-smokers Helsinn Healthcare SA|Celerion February 2014 Early Phase 1
NCT01112384 Completed Drug: SB939 Metastatic Sarcoma NCIC Clinical Trials Group|S*BIO|Canadian Cancer Trials Group March 18 2010 Phase 2
NCT00741234 Completed Drug: SB939|Drug: Azacitidine Solid Tumors|Hematologic Malignancies|Myelodysplastic Syndrome S*BIO April 2007 Phase 1

(data from https://clinicaltrials.gov, updated on 2022-08-01)

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