OXSI-2 is an inhibitor of Syk with an EC50 of 313 nM and an IC50 of 14 nM. OXSI-2 completely inhibits Adaptor protein LAT Y191 phosphorylation and Syk mediated events in platelets.
OXSI-2 (100 nM) does not affect the platelet functional responses induced by Convulxin, and modest shape change is still evident at 1 μM. OXSI-2 (2 μM) completely shape change and blocks GPVI-mediated dense granule release. OXSI-2 (2 μM) inhibits pyroptotic cell death, inflammasome assembly, caspase-1 activation, IL-1β processing and release and mitochondrial ROS generation.