CPI203, CAS No. 1446144-04-2, is a novel potent, selective and cell permeable inhibitor of the bromodomain and extra terminal (BET) family protein BRD4 with an IC50 of ~37 nM (BRD4 α-screen assay). It has an IC50 of ~99 nM in inhibiting Myc expression in MV4-11 cells and an IC50 of ~30 nM in inhibiting IL-6 production in THP-1 cells stimulated with LPS, decreases specific Ser2 phosphorylation of the carboxyl-terminal domain (CTD) of the RNA polymerase II (Pol II) by either endogenous BRD4 or a BRD4 mutant, BRD4 FEE-AAA, that is incapable of binding PTEFb. CPI203 is an analog of JQ-1 but has shown superior bioavailability with oral or intraperitoneal (IP) administration. When mice that were transplanted with primary mouse T-ALL cells, either Fbxw7+/+ or Fbxw7mut/+, were treated with CPI203 at 5 mg/Kg orally twice per day, a significant and rapid reduction in leukemia burden was observed. CPI203 is a useful chemical probe to study the suppression of Myc-dependent cancer development.

Product information

CAS Number: 1446144-04-2

Molecular Weight: 399.90

Formula: C19H18ClN5OS

Chemical Name: (S)-2-(4-(4-chlorophenyl)-2,3,9-trimethyl-6H-thieno[3,2-f][1,2,4]triazolo[4,3-a][1,4]diazepin-6-yl)acetamide

Smiles: CC1=NN=C2[C@H](CC(N)=O)N=C(C3=C(SC(C)=C3C)N12)C1C=CC(Cl)=CC=1

InChiKey: QECMENZMDBOLDR-AWEZNQCLSA-N

InChi: InChI=1S/C19H18ClN5OS/c1-9-10(2)27-19-16(9)17(12-4-6-13(20)7-5-12)22-14(8-15(21)26)18-24-23-11(3)25(18)19/h4-7,14H,8H2,1-3H3,(H2,21,26)/t14-/m0/s1

Technical Data

Appearance: Solid Power.

Purity: ≥98% (or refer to the Certificate of Analysis)

Solubility: DMSO up to 50 mM

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis

Storage Condition: Dry, dark and -20 ^oC for 1 year or refer to the Certificate of Analysis.

Shelf Life: ≥12 months if stored properly.

Stock Solution Storage: 0 - 4 ^oC for 1 month or refer to the Certificate of Analysis.

Drug Formulation: To be determined.

HS Tariff Code: 382200

How to use

In Vitro:

CPI203 was used at 0.5-1 µM final concentration in various in vitro assays.

In Vivo:

CPI203 could be dosed to the mice by oral administration at 5 mg/kg twice per day for 7 days.

References:

1. Devaiah BN, et al. BRD4 is an atypical kinase that phosphorylates serine2 of the RNA polymerase II carboxy-terminal domain. (2012) Proc Natl Acad Sci U S A. 109(18):6927-32.
2. Bryan King, et al. The Ubiquitin Ligase Fbxw7 Modulates Leukemia-Initiating Cell Activity by Regulating Myc Stability. (2013) Cell 153(7):1552-66.
3. Moros A, et al. Synergistic antitumor activity of lenalidomide with the BET bromodomain inhibitor CPI203 in bortezomib-resistant mantle cell lymphoma. (2014) Leukemia. In press.

Products are for research use only. Not for human use.

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