VX-
702 is a third generation inhibitor of p38 mitogen-
activated protein (MAP) kinases, binding to both p38α and p38β (K
d = 3.7 and 17 nM, respectively) in an ATP-
competitive fashion.
1 It inhibits IL-
6, IL-
1β, and TNF-
α production in LPS-
primed blood with IC
50 values of 59, 122, and 99 ng/ml, respectively.
1 VX-
702, at 1 μM, inhibits activation of p38 in platelets by thrombin, U-
46619 (Item No.
16450), or collagen but does not block platelet aggregation in response to collagen.
2 Although orally active, VX-
702 provides only transient suppression of biomarkers of inflammation in ongoing rheumatoid arthritis.
3