HS-243

Catalog No.S9701 Batch:S970102

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Technical Data

Formula

C17H16N4O3
Molecular Weight 324.33 CAS No. 848249-10-5
Solubility (25°C)* In vitro DMSO 10 mg/mL (30.83 mM)
Water Insoluble
Ethanol Insoluble
* <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.
* Room temperature shipping (Stability testing shows this product can be shipped without any cooling measures.)

Preparing Stock Solutions

Biological Activity

Description HS-243 is a highly potent interleukin-1 receptor-associated kinase (IRAK) inhibitor with IC50 of 24 nM, 20 nM and 0.5 μM for IRAK-1, IRAK-4 and TAK1, respectively.
Targets
IRAK-4 [1]
(Cell-free assay)		 IRAK-1 [1]
(Cell-free assay)		 TAK1 [1]
(Cell-free assay)
20 nM 24 nM 0.5 μM
In vitro

HS-243 has exquisite selectivity toward both IRAK-1 (IC50 = 24 nM) and IRAK-4 (IC50 = 20 nM), with only minimal TAK1-inhibiting activity (IC50 = 0.5 μM). Using HS-243 and takinib, we evaluates the consequences of cytokine/chemokine responses after selective inhibition of IRAK-1/4 or TAK1 in response to lipopolysaccharide challenge in human rheumatoid arthritis fibroblast-like synoviocytes. HS-243 specifically inhibits intracellular IRAKs without TAK1 inhibition and these kinases have distinct, nonredundant signaling roles.[1]

Protocol (from reference)

Kinase Assay:

[1]
  • Activity of purified IRAK-4 protein

    In brief, IRAK-4 (20 ng/well) is incubated with 2 mM ATP containing radiolabeled [32P]ATP in the presence of 300 μM substrate peptide in a final volume of 40 μl in the presence of buffer and HS-243. The reaction is terminated at 20 min with 10 μl of 1 M H3PO4. The remaining activity is measured using a scintillation counter. Dose–response curves are repeated two times and averaged.
Cell Assay:

[1]
  • Cell lines

    RA-FLS cells, THP-1 cells

  • Concentrations

    10 μM

  • Incubation Time

    24 h

  • Method

    RA-FLS cells or THP-1 cells are treated with 10 μM HS-243 or vehicle (DMSO), and 24 h after treatment, supernatant is added to human cytokine XL proteome array in accordance with the manufacturer’s protocol. Chemiluminescence is used to visualize protein quantities.

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SHIPPING AND STORAGE
Selleck products are transported at room temperature. If you receive the product at room temperature, please rest assured, the Selleck Quality Inspection Department has conducted experiments to verify that the normal temperature placement of one month will not affect the biological activity of powder products. After collecting, please store the product according to the requirements described in the datasheet. Most Selleck products are stable under the recommended conditions.

NOT FOR HUMAN, VETERINARY DIAGNOSTIC OR THERAPEUTIC USE.