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Background: Pracinostat (SB939) is an orally bioavailable, small-molecule histone deacetylase (HDAC) inhibitor with potential antineoplastic activity. Pracinostat inhibits HDACs, which may result in the accumulation of highly acetylated histones. It is a pan-HDAC inhibitor, inhibiting all HDAC isozymes except HDAC6 and HDAC7.
Biological Activity: SB 939 is an HDAC inhibitor that inhibits HDAC1 (IC50 = 49 nM), HDAC3 (IC50 = 43 nM), HDAC4 (IC50 = 56nM), HDAC5 (IC50 = 47 nM), HDAC9 (IC50 = 70 nM), HDAC10 (IC50 = 40 nM). Only poorly inhibits HDACs 6 or 7 (Kis = 247 and 104 nM, respectively). Prevents proliferation of ovarian (A2780), colon (COLO 205 and HCT-116), and prostate cancer (PC-3) cell lines at IC50 values of 0.48, 0.56, 0.48, and 0.34 µM, respectively.
CAS Number: 929016-96-6
Description: Potent and oral inhibitor of histone deacetylase (HDAC), selective for class I, II and IV HDACs. SB939 shows significant antiproliferative activity against a wide variety of tumor cell lines, with high tumor exposure and efficacy in mouse models of colorectal cancer.
Solubility: Soluble in DMSO
Storage Stability: Store at or below -20°C. Solid form is stable at least 12 months from date of receipt, when stored as directed. Do not store aqueous solutions for more than one day.
Target: HDAC
Biosafety Level: Not applicable (BSL-1)
References: 1. Novotny-Diermayr V, et al. Mol Cancer Ther. 2010 Mar;9(3):642-52.
2. Wang, H., et al. 2011. J. Med. Chem. 54(17): 4694-4720.
3. Novotny-Diermayr V, et al. Blood Cancer J. 2012 May;2(5):e69.
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