GSK2646264 (Compound 44) is a highly effective and specific inhibitor of spleen tyrosine kinase (SYK) with a pIC50 of 7.1. In addition to targeting SYK, GSK2646264 also inhibits several other kinases, including LCK, LRRK2, GSK3β, JAK2, VEGFR2, Aurora B, and Aurora A, with pIC50 values of 5.4, 5.4, 5.3, 5, 4.5, <4.6 and <4.3, respectively. Notably, GSK2646264 demonstrates skin penetrability, reaching both the epidermis and dermis [1].
Lu AF58786 is a novel potent and selective inhibitor of LRRK2, inhibiting LRRK2 WT, the overactive variant G2019S, and the resistant mutant A2016T56 at 12 nM, 19 nM and 93 nM, respectively.
SRI-29132 is potent; highly permeant of the blood-brain barrier; and selective for LRRK2 kinase activity, therefore effective in attenuating pro-inflammatory responses in macrophages and in rescuing neurite retraction phenotypes in neurons.