DUSP22 and lupus nephritis: In particular, JKAP protein levels in peripheral blood T cells from active lupus nephritis patients (JKAP/actin = 0.09 ± 0.14 fold, n = 12; P = 0.003) were more reduced than those from inactive lupus nephritis patients (JKAP/actin = 0.34 ± 0.27 fold, n = 9) and non-nephritis patients (JKAP/actin = 0.34 ± 0.24 fold, n = 22; Table 2).