PHA-408 is a potent, selective I kappa B-kinase 2 (IKK-2) inhibitor. PHA-408 is a tight binding, ATP competitive IKK-2 inhibitor with greater than 350-fold selectivity for IKK-2 vs IKK-1 (IC50 values of 10-40 nM at IKK-2 vs 14 μM at IKK-1). PHA-408 was shown to suppress inflammatory cellular events, and to reduce inflammation in animal models of arthritis.
