Low-Concentration Ozone Reacts with Plasmalogen Glycerophosphoethanolamine Lipids in Lung Surfactant
作者:Kelly M. Wynalda、Robert C. Murphy
DOI:10.1021/tx900306p
日期:2010.1.18
quantitated using gas chromatography−mass spectrometry, and production was consistent with oxidation of the vinyl ether, at low concentrations of ozone. Analysis of murine lung surfactant from C57Bl/6 mice revealed several plasmalogen PE lipid species, encompassing ∼38% of total PE species. Upon exposure of ozone (0 and 100 ppb) to murine surfactant, plasmalogen PE molecular species preferentially reacted
臭氧是一种常见的环境毒物,个人每天都会接触到。虽然诸如死亡率增加、肺功能减退和炎症过程开始等生化终点是已知的,但实际上对肺部健康变化的化学机制知之甚少,尤其是对于低浓度臭氧。本研究旨在调查可能暴露于肺内环境臭氧的内源性脂质的臭氧诱导氧化,特别关注肺表面活性剂中存在的缩醛磷脂甘油磷脂。开发了灵敏的液相色谱-质谱法来跟踪二酰基和缩醛磷脂磷脂酰乙醇胺 (PE) 磷脂的氧化,并鉴定和定量臭氧分解产生的产物。哦-octadec-1'-enyl-2-octadecenoyl-PE 和 1,2-dihexadecanoyl-PC,这些研究表明,与烯烃键相比,缩醛磷脂的乙烯基醚键在低浓度臭氧 (100 ppb) 下优先被氧化相同磷脂中脂肪酰基链 ω-9 的氧化。产生的主要磷脂产物被鉴定为 1-formyl-2-octadecenoyl-PE 和 1-hydroxy-2-octadecenoyl-PE。还使