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应用LC/TOF-MS分析食管鳞状细胞癌血浆小分子代谢物的实验研究

彭  媛,刘  冉,李晓波,尹立红*   

  1. ( 东南大学公共卫生学院环境医学工程教育部重点实验室,江苏  南京  210009 )
  • 收稿日期:2013-03-29 修回日期:2013-07-04 出版日期:2013-11-30 发布日期:2013-11-30
  • 通讯作者: 尹立红,E-mail:lhyin@seu.edu.cn
  • 作者简介:彭 媛 (1989- ),女,湖南省浏阳市人,硕士研究生,研究方向:环境流行病学。E-mail:pengy0221@sina.com
  • 基金资助:

    国家自然科学基金项目(81172747,81072259);江苏省自然科学基金项目(BK2010407)

A pilot study of plasma metabolic biomarkers for esophageal squamous cell carcinoma by LC/TOF-MS

PENG Yuan,LIU Ran,LI Xiao-bo,YIN Li-hong*   

  1. (Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, Jiangsu, China)
  • Received:2013-03-29 Revised:2013-07-04 Online:2013-11-30 Published:2013-11-30
  • Contact: YIN Li-hong,E-mail:lhyin@seu.edu.cn

摘要:

 目的: 利用液相色谱-飞行时间质谱 (liquid chromatography-time of flight- mass spectrography,LC/TOF-MS)检测食管鳞状细胞癌 (esophageal squamous cell carcinoma,ESCC)血浆中小分子代谢物质的变化,探讨与ESCC相关的小分子代谢标志物。方法:收集ESCC和健康对照血浆样本各30例,应用LC/TOF-MS方法检测,采用MassHunter软件对数据进行分子特征提取,MPP软件对其进行分析,对可能的代谢物精确质量在METLIN公共数据库中进行搜索查询。结果:与健康对照组相比,ESCC组共找到差异表达的血浆小分子代谢物数目46个,其中13个上调,33个下调。经过METLIN数据库搜索后,ESCC血浆中的磷脂酸、磷脂酰丝氨酸、磷脂酰甘油碎片含量与健康对照组相比显著降低。结论:基于LC/TOF-MS的血浆小分子代谢物分析策略可有效区分食管癌和健康个体,在食管癌的早期诊断和人群筛检方面具有较好的应用前景。

关键词: 代谢组学, 液相色谱-飞行时间质谱, 小分子物质, 食管鳞状细胞癌

Abstract:

 OBJECTIVE: The plasma low-molecular weight metabolites of esophageal squamous cell carcinoma were analyzed by liquid chromatography-time of flight- mass spectrography( LC/TOF-MS) to explore potential biomarkers for the early detection of ESCC. METHODS:Plasma samples were obtained from 30 ESCC patients and 30 healthy volunteers,low-molecular weight metabolites were identified by LC/TOF-MS,feature detection was performed by MassHunter software MFE algorithm,statistical analysis was conducted by MPP software,and primary identification was achieved by searching METLIN database. RESULTS:Compared to healthy controls,46 differentially expressed features were detected,13 of which were up-regulated in ESCC group,while the other 33 were down-regulated. After searching with METLIN database,plasma levels of PA,PS,PG were significantly lower in ESCC group. CONCLUSION:ESCC patients are markedly different from healthy people in plasma metabolite composition,and the LC/TOF-MS plasma metabonomics shed light on esophageal cancer early detection and screening.

Key words:  metabonomics, liquid chromatography-time of flight-mass spectrography, low-molecular weight metabolites, esophageal squamous cell carcinoma