GSK-J1 is a highly potent inhibitor of H3K27 histone demethylase JMJD3 (KDM6B) and UTX (KDM6A) with IC50 of 60 nM in cell-free assays for JMJD3 (KDM6B) , respectively, >10-fold selectivity over other tested demethylases, with IC50 of 0.95μM and 1.76μM towards JARID1B/C.
In HEK-293 cells, GSK-J1 inhibits the activities of transiently transfected JMJD3 and UTX. GSK-J1 also inhibits TNF-α production by human primary macrophages by increasing total nuclear H3K27me3 levels. [1] In MC3T3-E1 cells, GSK-J1 suppresses Runx2 and Osterix expressions and ALP activity, and increases the global levels of H3K27me3. [2]
[1] Kruidenier L, et al. Nature. 2012, 488(7411), 404-408. [2] Yang D, et al. J Cell Biochem. 2015. doi: 10.1002/jcb.25210.