FX1

FX1 is a potent and specific BCL6 inhibitor, with an IC50 of around 35 μM.

Product information

CAS Number: 1426138-42-2

Molecular Weight: 368.82

Formula: C14H9ClN2O4S2

Chemical Name: 3-{5-[(3Z)-5-chloro-2-oxo-2,3-dihydro-1H-indol-3-ylidene]-4-oxo-2-sulfanylidene-1,3-thiazolidin-3-yl}propanoic acid

Smiles: OC(=O)CCN1C(=S)S/C(=C2/C3C=C(Cl)C=CC=3NC/2=O)/C1=O

InChiKey: VISHSGZPGQKEFX-KHPPLWFESA-N

InChi: InChI=1S/C14H9ClN2O4S2/c15-6-1-2-8-7(5-6)10(12(20)16-8)11-13(21)17(14(22)23-11)4-3-9(18)19/h1-2,5H,3-4H2,(H,16,20)(H,18,19)/b11-10-

Technical Data

Appearance: Solid Power

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

Solubility: DMSO : 10 mg/mL (27.11 mM; Need ultrasonic).

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:

DLBCL cells are exposed to 50 μM FX1 for 30 minutes. FX1 profoundly reduces recruitment of BCOR and SMRT to all 3 BCL6 target genes, but not at a negative control locus. There is little presence of SMRT at these loci in the BCL6-negative DLBCL cell line, which is not affected by FX1. The superior potency of FX1 versus 79-6 in disrupting BCL6 binding to SMRT is evident when these small molecules are compared head to head in quantitative ChIP assays in DLBCL cells after treatment with 50 μM FX1 for 6 hours. DLBCL cells are exposed to FX1 and mRNA is collect at 4 serial time points. FX1 almost invariantly induces significant derepression of these genes as compare with vehicle in 2 independent DLBCL cell lines.

In Vivo:

Spleens in FX1-treating mice are macroscopically indistinguishable from vehicle controls. Total B cell abundance measured by flow cytometry is unaffected by FX1. GC B cells (GL7+FAS+B220+) are significantly depleted by exposure to FX1. Splenic architecture is examined by IHC. Staining with B220 antibody reveals normal B cell follicular structures, whereas staining for the GC B cell-specific marker peanut agglutinin shows profound loss of GCs. The half-life is estimated to be approximately 12 hours. Finally, whether FX1 can induce toxic effects in mice is assessed. No signs of toxicity, inflammation, or infection are evident from H&E-stained sections of lung, gastrointestinal tract, heart, kidney, liver, spleen, and bone marrow of the fixed organs from mice treated with FX1 compare with vehicle.

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