Ex vivo pharmacodynamic assay results demonstrated a greater selectivity of UPA on JAK1 versus JAK3 compared to TOF. This analysis conducted ex vivo stimulation of STAT3 phosphorylation by IL-6 as a measure of JAK1 activity and STAT5 phosphorylation by IL-7 as a measure of JAK1/JAK3 activity. Change in pSTAT3 and pSTAT5 were calculated at 1, 6 and 12 hours following drug administration using samples collected from healthy subjects and subjects with RA, from 2 phase 1 studies. Exposure-response m...

January 2020

In SELECT-NEXT, UPA demonstrated clinically meaningful improvements in patient reported outcomes compared to PBO in patients with RA who had an inadequate response to csDMARDs. In this post hoc analysis, the effect of UPA 15 or 30 mg on patient reported outcomes were assessed and compared to PBO.Eligible patients (661) with an inadequate response to csDMARDs were randomly assigned 2:2:1:1 to receive background csDMARD therapy with either UPA 15 mg, UPA 30 mg or PBO. PROs collected at Wk4 and Wk1...