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BAY 61-3606 Chemical Structure
BAY 61-3606 is a potent, ATP-competitive, reversible, and highly selective inhibitor of Syk tyrosine kinase activity (Ki= 7.5 nM) with no inhibitory effect against Btk, Fyn, Itk, Lyn, and Src.
IC50 value: 7.5 nM (Ki) 
in vitro: BAY 61-3606 inhibited not only degranulation (IC50 values between 5 and 46 nM) but also lipid mediator and cytokine synthesis in mast cells. BAY 61-3606 was highly efficacious in basophils obtained from healthy human subjects (IC50 = 10 nM) and seems to be at least as potent in basophils obtained from atopic (high serum IgE) subjects (IC50 = 8.1 nM). B cell receptor activation and receptors for Fc portion of IgG signaling in eosinophils and monocytes were also potently suppressed by BAY 61-3606 . We identified BAY61-3606 as an inhibitor of proliferation in colorectal cancer cells expressing mutant forms of K-RAS, but not in isogenic cells expressing wild-type K-RAS. In addition to its anti-proliferative effects in mutant cells, BAY61-3606 exhibited a distinct biological property in wild-type cells in that it conferred sensitivity to inhibition of RAF. In this context, BAY61-3606 acted by inhibiting MAP4K2 (GCK), which normally activates NFκβ signaling in wild-type cells in response to inhibition of RAF .
in vivo: Oral administration of BAY 61-3606 to rats significantly suppressed antigen-induced passive cutaneous anaphylactic reaction, bronchoconstriction, and bronchial edema at 3 mg/kg. Furthermore, BAY 61-3606 attenuated antigen-induced airway inflammation in rats .
|M.Wt||390.4||Storage||Please store the product under the recommended conditions in the Certificate of Analysis.|
|Solvent & Solubility||
10 mM in DMSO
|1 mg||5 mg||10 mg|
|1 mM||2.5615 mL||12.8074 mL||25.6148 mL|
|5 mM||0.5123 mL||2.5615 mL||5.1230 mL|
|10 mM||0.2561 mL||1.2807 mL||2.5615 mL|
. Yamamoto N, et al. The orally available spleen tyrosine kinase inhibitor 2-[7-(3,4-dimethoxyphenyl)-imidazo[1,2-c]pyrimidin-5-ylamino]nicotinamide dihydrochloride (BAY 61-3606) blocks antigen-induced airway inflammation in rodents. J Pharmacol Exp Ther. 2003 Sep;306(3):1174-81.
Cerdulatinib(PRT-062070; PRT2070) is an novel oral dual Syk/JAK inhibitor.
GS-9973 is a highly selective and orally efficacious Syk inhibitor(IC50= 7.7 nM) which is currently undergoing clinical evaluation for autoimmune and oncology indications.
R112 is an ATP-competitive inhibitor of Syk kinase with a Ki of 96 nM. R112 inhibits Syk kinase activity with an IC50 of 226 nM.
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