R-112

R112 is a Syk inhibitor. R112 inhibited degranulation induced by anti-IgE cross-linking in mast cells (tryptase release, effective concentration for 50% inhibition [EC(50)] = 353 nmol/L) or basophils (histamine release, EC(50) = 280 nmol/L), and by allergen (dust mite) in basophils (histamine release, EC(50) = 490 nmol/L). R112 also blocked leukotriene C4 production and all proinflammatory cytokines tested. Subsequent molecular characterization indicated that R112 is an ATP-competitive spleen tyrosine kinase (Syk) inhibitor (inhibitory constant [K(i)] = 96 nmol/L).

Product information

CAS Number: 575474-82-7

Molecular Weight: 312.30

Formula: C16H13FN4O2

Chemical Name: 3-({5-fluoro-2-[(3-hydroxyphenyl)amino]pyrimidin-4-yl}amino)phenol

Smiles: OC1=CC(=CC=C1)NC1=NC(NC2=CC(O)=CC=C2)=NC=C1F

InChiKey: TVKGTSHBQZEFEE-UHFFFAOYSA-N

InChi: InChI=1S/C16H13FN4O2/c17-14-9-18-16(20-11-4-2-6-13(23)8-11)21-15(14)19-10-3-1-5-12(22)7-10/h1-9,22-23H,(H2,18,19,20,21)

Technical Data

Appearance: Solid Power.

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

Solubility: DMSO: 62 mg/mL(198.52 mM). Water: Insoluble.

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: ≥360 days 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:

R112 inhibits degranulation induced by anti-IgE cross-linking in mast cells (tryptase release, effective concentration for 50% inhibition [EC50] = 353 nmol/L) or basophils (histamine release, EC50 = 280 nmol/L), and by allergen (dust mite) in basophils (histamine release, EC50 = 490 nmol/L). R112 also blocks leukotriene C4 production and all proinflammatory cytokines tested. Its onset of action is immediate, and the inhibition is reversible. R112 is able to completely inhibit all three IgE-induced mast cell functions: degranulation, lipid mediator production, and cytokine production. R112 does not inhibit phosphorylation of the Lyn target Syk (Y352), but inhibits the phosphorylation of the Syk target LAT (Y191), indicating that Syk kinase is the primary target of R112. Most phosphorylation events downstream of Syk are inhibited with similar potency by R112. In vitro kinase assays do not always correlate with the corresponding activity inside cells. R112 inhibits the Lyn kinase in vitro assay with an IC50 of 0.3 μmol/L; however, as mentioned previously, in CHMCs (Cultured human mast cells), R112 does not inhibit the phosphorylation of Syk (Y352), and therefore most likely does not inhibit Lyn activity.

References:

1. Rossi AB, et al. J Allergy Clin Immunol. 2006, 118(3):749-55.

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