IFI27 as a potential indicator for severe Enterovirus 71-infected hand foot and mouth disease.

The pathogenesis of Enterovirus 71 (EV71)-induced severe hand foot and mouth disease (HFMD) has not yet been clearly established. Further study into the mechanisms underlying host immune responses to EV71 infection and identifying important predictors will be crucial to antiviral treatment and early recognition of severe HFMD. The present study establishes that T help (Th)1 type, Th2 type, and Th17 type cytokine levels in serum of peripheral blood from patients with severe HFMD is higher than in peripheral blood from healthy subjects. The most significant increase occurred as the IL-6. In order to identify the important molecules in peripheral blood mononuclear cells (PBMCs) from severe HFMD patients, we performed transcriptome sequencing analysis of PBMC from severe HFMD patients and compared them to healthy controls. Interferon α-inducible protein 27 (IFI27) and cluster of differentiation 27 (CD27) were found to be the most significant differentially expressed gene. Finally, IFI27 was proved to be present at higher levels in patients with severe HFMD than in patients with mild HFMD. Our results suggest that IFI27 may be an indicator of the severity of cases EV71-induced HFMD.

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