Interleukin-6, interleukin-8, and soluble tumor necrosis factor receptor-I in the cord blood as predictors of chronic lung disease in premature infants

Objectives In order to predict the late-development of chronic lung disease of prematurity (CLD), cytokines in the cord blood were assessed in this study. Study design Eighteen premature infants with CLD were enrolled. Cord blood plasma levels of cytokines of these infants and 12 control infants without CLD were measured including interleukin (IL)-1β, IL-2, IL-4, IL-6, IL-8, IL-10, interferon (IFN)-γ, tumor necrosis factor (TNF)-α, soluble TNF receptor-I, and soluble IL-6 receptor using a cytometric bead array and an enzyme-linked immunosorbent assay. Results The cord blood IL-6, IL-8, and sTNFR-I levels were significantly elevated in CLD infants compared with those in control (P< .05). IL-1β, IL-2, IL-4, IL-10, and IFN-γ were undetectable in both groups. CLD infants with maternal chorioamnionitis had higher IL-6 than those without chorioamnionitis (P< .01). In CLD infants, IL-6 was higher in the infants who required prolonged oxygen therapy (P< .05). Conclusion Elevated inflammatory cytokines in the cord blood are associated with the progression to CLD.