Serum dual-specificity phosphatase 1 reflects decreased exacerbation risk, correlates with less advanced exacerbation severity and lower inflammatory cytokines in children with asthma.

Abstract

It is as fact that dual-specificity phosphatase 1 (DUSP1) regulates the T cell activation, pro-allergic response, and inflammation to engage with the pathogenesis of asthma, but its clinical role in children with asthma is unclear. The present study aimed to explore the expression of DUSP1, its association with exacerbation risk, severity, and inflammatory cytokines in children with asthma. Around 52 children with asthma-exacerbation, 50 children in asthma-remission, and 50 healthy children were chosen for the study. The serum levels of DUSP1, as well as tumor necrosis factor-α (TNF-α), interleukin (IL)-1β, IL-6, and IL-17 were detected by the enzyme-linked immunosorbent assay. The levels of DUSP1 was the highest in healthy children (median (IQR)=34.305 (25.892- 43.693) ng/mL), the second highest in children in asthma-remission (median (IQR)=21.471 (18.581-27.934) ng/mL), and the lowest in children with asthma-exacerbation (median (IQR)=13.982 (7.901-21.624) ng/mL) (P<0.001). At the same time, DUSP1 was also related to decreased asthma risk with area under curve (AUC) (95%CI) of 0.847 (0.780-0.914), and correlated with its lower exacerbation risk with AUC (95%CI) of 0.755 (0.661-0.849). Besides, DUSP1 was negatively linked with exacerbation severity (rs =-0.338, P=0.014), immunoglobulin E (rs =-0.277, P=0.047), TNF-α (rs =-0.423, P=0.002), IL-1β (rs =-0.389, P=0.004), and IL-17 (rs =-0.293, P=0.035), but not related with other disease features in children with asthma-exacerbation. Meanwhile, DUSP1 was only negatively associated with TNF-α (rs=-0.300, P=0.034) and IL-1β (rs =-0.309, P=0.029) in children in asthma-remission. However, no correlation was found in DUSP1 with inflammatory cytokines or other disease features in healthy children (all P>0.05). DUSP1 reflects the reduced exacerbation risk, and associates with lower exacerbation severity and inflammatory cytokines in children with asthma-exacerbation; it also associates with inflammatory cytokines in children in asthma-remission. These findings suggest that DUSP1 may help to improve the management of asthmatic children.