Quantitative Evaluation on the Degradation Process of the Pulmonary Surfactant Monolayer When Exposed to Low-Level Ozone of Ambient Environment
作者:Lin Qiao、Zhen Chen、Chunji Takada、Hitoshi Chiba、Ken-ichi Inoue、Shu-Ping Hui、Shen Ye
DOI:10.1021/acs.analchem.2c00576
日期:2022.6.21
ocholine (POnPC) and a trace amount of an acid-type one of 1-palmitoyl-2-azelaoyl-sn-glycero-3-phosphocholine (PAzPC), as well as a pair of secondary ozonide (SOZ) isomers. Furthermore, with prolonged exposure, the SOZ stayed constant but the yield of PAzPC significantly increased with the decrease in POnPC. The low-level ozone-induced oxidation mechanisms for unsaturated lipids are discussed based
臭氧是一种具有高化学反应性的强效环境氧化剂,在周围环境中的含量很低,仅为几十 ppb。然而,关于低水平臭氧对呼吸系统的影响,我们只知道有限的信息。在本研究中,我们系统地研究了 1-palmitoyl-2-oleoyl- sn的降解。-甘油-3-磷酸胆碱 (POPC),它是肺表面活性剂 (PS) 的主要成分之一,使暴露于低环境臭氧水平 (40 ± 10 ppb) 的肺具有呼吸功能。使用液相色谱-质谱技术结合 Langmuir-Blodgett 方法,我们首先通过确定暴露于周围环境期间的降解产物来跟踪 POPC 分子的降解过程。结果,我们发现POPC分子可以在45分钟内从C=C部分轻松降解,产生1-palmitoyl-2-(9'-oxo-nonanoyl) -sn - glycero-的醛类产物。 3-磷酸胆碱 (POnPC) 和微量的 1-palmitoyl-2-azelaoyl- sn