XIST and systemic lupus erythematosus: Using this approach, we found significantly higher levels of XIST RNA in cells from women with SLE compared with sex-matched healthy controls: the MFI ± SEM of XIST in female SLE PBMCs was 5,848 ± 561.6 compared with 4,252 ± 505.9 in female healthy controls (P = 0.04).