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We previously identified a role for EZH2, a transcriptional regulator in inducing proinflammatory epigenetic changes in lupus CD4+ T cells. This study was undertaken to investigate whether inhibiting EZH2 ameliorates lupus‐like disease in MRL/lpr mice.

EZH2 expression levels in multiple cell types in lupus patients were evaluated using flow cytometry and messenger RNA expression data. Inhibition of EZH2 in MRL/lpr mice was achieved by intraperitoneal 3′‐deazaneplanocin (DZNep) administration using a preventative and a therapeutic treatment model. Effects of DZNep on animal survival, anti–double‐stranded DNA (anti‐dsDNA) antibody production, proteinuria, renal histopathology, cytokine production, and T and B cell numbers and percentages were assessed.

EZH2 expression levels were increased in whole blood, neutrophils, monocytes, B cells, and CD4+ T cells in lupus …