The role of CD83 in the pathogenesis of immune thrombocytopenia

CD83 are closely related to the pathogenesis of immune thrombocytopenia (ITP), but the exact mechanism remains unclear.

To explore the relationship between CD83 and CD4⁺ T cell subsets and clarify the role of CD83 in the pathogenesis of ITP.

RT-qPCR and Flow cytometry were used to illustrate CD83 expression. The downregulation and overexpression of DC-CD83 were co-cultured with CD4⁺ T cells to detect cell proliferation, co-cultured supernatant cytokines and Tregs expression.

The results indicate that the ITP patients showed higher expression of CD83 than the healthy controls. The proliferation of CD4⁺ T cells was inhibited by downregulation of DCs-CD83 but promoted by overexpression of DCs-CD83. siRNA-CD83 inhibited proinflammatory IFN-γ and IL-17 secretion while raising TGF-β, IL-10 concentrations. Overexpression of DCs-CD83 promoted Tregs expression.

The Th1/Th2 and Th17/Tregs polarization were reversed via interfering DCs with siRNA-CD83. CD83 plays an important role in ITP pathogenesis, suggesting novel treatment for ITP patients.