| 体外研究: |
BMS-066 is shown to inhibit IKKβ-catalyzed phosphorylation of IKKβ in vitro with an IC50 of 9 nM and is more than 500-fold selective for IKKβ over the closely related IKKα. To understand the selectivity on a more comprehensive scale, BMS-066 is assayed against 155 additional kinases at 10 μM, and only six of these kinases are inhibited more than 75%. This indicates that BMS-066 is more than 400-fold selective for IKKβ over more than 95% of the kinases tested. For the six kinases showing more than 75% inhibition at 10 μM, IC50 values are determined in dose-response assays and BMS-066 is shown to be more than 30-fold selective against even the next most potently inhibits kinase (Brk). BMS-066 inhibits LPS-stimulated cytokine production in human peripheral blood mononuclear cells, both at the protein and message level, with IC50 values of approximately 200 nM against these endpoints. BMS-066 inhibits the IKKβ-catalyzed phosphorylation of IkBα in LPS stimulated cells with a similar IC50 value. BMS-066 shows IC50 values of 72 and 1020 nM against the Tyk2 pseudokinase domain probe displacement and IL-23-stimulated reporter assays, respectively. |