Abstract
Th1 and Th17 cells have been strongly implicated in the pathogenesis of systemic lupus erythematosus (SLE). Interleukin (IL)-12 and IL-23 respectively drive the polarization of Th1 and Th17 cells and share a common p40 subunit. In this study, the protective and therapeutic effects of a truncated human IL-12rβ1 receptor (tIL12rβ1) targeting IL-12/IL-23 p40 were evaluated in chronic graft-versus-host disease (cGVHD)-induced SLE-like model. The results indicated that tIL12rβ1 treatment effectively delayed the proteinuria onset and induced a significant remission of proteinuria, autoantibody production, and immune complex deposition in the mouse model. Remarkably, the therapeutic effects of tIL12rβ1 were predominantly dependent on the suppression of pathogenic Th1 and Th17 cell commitment through the reduction of RORγt and T-bet expression. Collectively, this receptor molecule may offer a new treatment option for SLE.
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