Description
BAY 61-3606 is a cell-permeable, reversible inhibitor of spleen tyrosine kinase (Syk; Ki = 7.5 nM; IC50 = 10 nM). It is 700 to >1,000-fold more selective for Syk over Src, Lyn, Fyn, Itk, and Btk. BAY 61-3606 can inhibit degranulation (IC50 = 5-46 nM) and block cytokine release from mast cells. It shows good in vivo efficacy in the treatment of various allergy and asthma conditions in rat models. This compound has been used in a pre-clinical model to explore the feasibility of targeting Syk in the treatment of retinoblastoma