Mass-spectrometric analysis of hydroperoxy- and hydroxy-derivatives of cardiolipin and phosphatidylserine in cells and tissues induced by pro-apoptotic and pro-inflammatory stimuli
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- 作者：Vladimir A. Tyurin ; Yulia Y. Tyurina ; Mi-Yeon Jung ; Muhammad A. Tungekar ; Karla J. Wasserloos ; Hü ; lya Bayı ; r ; Joel S. Greenberger ; Patrick M. Kochanek ; Anna A. Shvedova ; Bruce Pitt ; Valerian
- 关键词：Oxidative lipidomics ; Cardiolipin ; Phosphatidylserine ; Phospholipid hydroperoxides ; Mass-spectrometry ; Cytochrome c ; Apoptosis
- 刊名：Journal of Chromatography B, Analytical Technologies in the Biomedical and Life Sciences
- 出版年：2009
- 出版时间：15 September 2009
- 年：2009
- 卷：877
- 期：26
- 页码：2863-2872
- 全文大小：895 K
文摘
Oxidation of two anionic phospholipids – cardiolipin (CL) in mitochondria and phosphatidylserine (PS) in extramitochondrial compartments – is important signaling event, particularly during the execution of programmed cell death and clearance of apoptotic cells. Quantitative analysis of CL and PS oxidation products is central to understanding their molecular mechanisms of action. We combined the identification of diverse phospholipid molecular species by ESI-MS with quantitative assessments of lipid hydroperoxides using a fluorescence HPLC-based protocol. We characterized CL and PS oxidation products formed in a model system (cyt c/H2O2), in apoptotic cells (neurons, pulmonary artery endothelial cells) and mouse lung under inflammatory/oxidative stress conditions (hyperoxia, inhalation of single walled carbon nanotubes). Our results demonstrate the usefulness of this approach for quantitative assessments, identification of individual molecular species and structural characterization of anionic phospholipids that are involved in oxidative modification in cells and tissues.