CYTOCHROME P450 AND LUNG IN HUMAN PRETERM INFANTS

描述（改编自研究者摘要）：本研究的目标 本研究旨在探讨P-450在肺损伤中的作用 有患BPD风险的早产儿 目标1是确定是否 细胞色素P-450抑制剂西咪替丁将减少早期肺损伤， 反映在人类早产儿的肺部气体交换中， 波士顿警局 目的二是确定研究中的脂质过氧化程度 通过测量气管支气管抽吸物中的F2-异前列烷水平 和尿液中。 目的3鉴定P-450介导的花生四烯酸（AA） 入组患者的气管支气管抽吸物中的代谢物 研究并将特定代谢物的水平与 分配的处理和气体交换指数。 目标4：识别 气管支气管抽吸物和尿液中的炎症标志物， 研究患者，以确定预期的O2减少是否 患者体内自由基生成和P-450 AA代谢产物生成 接受西咪替丁也伴随着减少的炎症反应。

DESCRIPTION (Adapted from the Investigator's Abstract): The goal of this project is to determine the role of lung cyt P-450 in mediating lung injury in the newborn premature infant at risk for BPD. Aim 1 is to determine if the cyt P-450 inhibitor cimetidine will reduce early lung injury, as reflected by pulmonary gas exchange, in human premature infants at risk for BPD. Aim 2 is to determine the degree of lipid peroxidation in study patients by measuring F2-isoprostane levels in tracheobronchial aspirates and in urine. Aim 3 is to identify P-450 mediated arachidonic acid (AA) metabolites in tracheobronchial aspirates obtained from patients enrolled in the study and to correlate the levels of specific metabolites with the assigned treatment and gas exchange index. Aim 4 is to identify inflammatory markers in tracheobronchial aspirates and urine obtained from study patients in order to determine whether the anticipated reduction in O2 free radical generation and P-450 AA metabolite production in patients receiving cimetidine is also accompanied by a reduced inflammatory response.