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J Breath Res

Title:		Effect of H(2)O(2) induced oxidative stress (OS) on volatile organic compounds (VOCs) and intracellular metabolism in MCF-7 breast cancer cells
Author(s):		Liu Y; Li W; Duan Y;
Address:		"Key Laboratory of Bio-resource and Eco-environment, Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, People's Republic of China. Research Center of Analytical Instrumentation, Sichuan University, Chengdu, People's Republic of China"
Journal Title:		J Breath Res
Year:		2019
Volume:		20190424
Issue:		3
Page Number:		36005 -
DOI:		10.1088/1752-7163/ab14a5
ISSN/ISBN:		1752-7163 (Electronic) 1752-7155 (Linking)
Abstract:		"Oxidative stress (OS) refers to the process of oxidative damage caused by reactive oxygen species (ROS) and reactive nitrogen species (RNS) accumulated by the organisms or cells during the process of generating and scavenging oxygen free radicals. In this study, an OS model of MCF-7 cells was constructed through H(2)O(2)-treatment, which for the first time combined volatile organic compounds (VOCs) and intracellular metabolic analysis for a comprehensive and in-depth study of the OS effect on cell metabolism. The VOCs produced by cells in H(2)O(2)-treated groups and control groups were extracted with solid-phase microextraction (SPME) and analyzed by gas chromatography-mass spectrometer (GC-MS). Meanwhile, the intracellular metabolites were extracted by methanol and analyzed by GC-MS coupled with silyl-derivatization. The results indicated 15 VOCs and 29 intracellular metabolites were statistically different (p < 0.05) between the H(2)O(2)-treated groups and the control groups. The VOC biomarkers were mainly linear chain alkanes and branched chain alkanes, and they were up-regulated in cells treated by H(2)O(2). The intracellular metabolites with significant changes were mainly fatty acids, amino acids, and organic acids. Most of them, however, were down-regulated under OS state. This study revealed volatile and non-volatile metabolites that influenced by elevated OS in MCF-7 cells, and provided clues for mechanism exploration of exhaled biomarkers, thus promoting the non-invasive prediction of BC"
Keywords:		Breast Neoplasms/*genetics Breath Tests/*methods Gas Chromatography-Mass Spectrometry/methods Humans Hydrogen Peroxide/*chemistry MCF-7 Cells Oxidative Stress/*physiology Volatile Organic Compounds/*chemistry;
Notes:		"MedlineLiu, Yuanling Li, Wenwen Duan, Yixiang eng Research Support, Non-U.S. Gov't England 2019/03/30 J Breath Res. 2019 Apr 24; 13(3):036005. doi: 10.1088/1752-7163/ab14a5"