摘要
细胞因子等炎症介质与呼吸道病原体之间的关系目前仍不明了。本前瞻性队列研究评估了141例机械辅助呼吸早产儿在出生时支气管内病原体侵袭情况。分析了脐血C反应蛋白(CRP)与呼吸道细胞因子免疫应答的关系。在所研究的141例早产儿中,有37例(26%)
The possible association between mediators of inflammation such as cytokines and perinatal colonization of the respiratory tract remains unclear. This prospective cohort study evaluated endotracheal colonization in 141 ventilated preterm infants at birth. The relation with cytokine response in the airways and C-reactive protein (CRP) in umbilical blood was investigated. Of the 141 preterm infants enrolled in this study, 37 (26%) were colonized. In addition to traditional pathogens (61%), commensal species (26%) and Mycoplasmataceae (13%) were isolated. Both the pro-inflammatory cytokines IL - 1β, IL -6, IL - 8, and tumor necrosis factor (TNF) - α as well as the antiinflammatory IL - 10 are increased in colonized patients in a dose - dependent manner, with the strongest response in neonates colonized with Gram - negative organisms. There was no antimicrobial IL - 12p70 response in colonized infants. Commensal flora is associated with the same inflammatory response as traditional pathogens. Although the umbilical cord blood CRP level was significantly higher in neonates with endotracheal colonization, it was highest in those colonized with Gram-negative organisms but still close to normal limits. Microorganisms in the endotracheal fluid of ventilated preterm infants are associated with a pathogen-specific and dose-dependent cytokine response in the airways and systemic CRP response.
