Abstract：Objective To study the influence of glucose-6-phosphate dehydrogenase (G6PD) deficiency on hand-foot-mouth disease (HFMD) induced by enterovirus 71 (EV71), and possible mechanisms. Methods A total of 220 boys with HFMD induced by EV71 were classified into two groups based on disease severity: mild/moderate (n=145) and severe HFMD groups (n=75), and 132 healthy boys were selected as the control group. The activity of G6PD and levels of reduced glutathione (GSH) and malonaldehyde (MDA) in blood were measured using the automatic biochemical analyzer. Results The percentage of G6PD deficiency cases in the severe HFMD group was significantly higher than in the control group (P<0.0125). In the severe HFMD group, the durations of fever, mental abnormality, limb trembling and hospital stay were significantly longer in children with G6PD deficiency than in those with normal G6PD activity (P<0.05). In the acute and recovery stages, patients in the mild/moderate and severe HFMD groups had significantly lower GSH levels and G6PD activity and significantly higher MDA levels compared with those in the control group (P<0.05). In the acute stage, children in the mild/moderate and severe HFMD groups with G6PD deficiency had significantly lower GSH levels and significantly higher MDA levels compared with those with normal G6PD activity (P<0.01). In the acute and recovery stages, GSH level in children with HFMD was positively correlated with G6PD activity (r=0.61, P<0.01; r=0.58, P<0.01), and in the acute stage, MDA level was negatively correlated with G6PD activity (r=-0.29, P<0.01). Conclusions G6PD deficiency is probably a predisposing factor for HFMD induced by EV71 and may aggravate the patient's condition. Its mechanism might be related to oxidative stress.
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