波谱学杂志 ›› 2015, Vol. 32 ›› Issue (2): 382-392.doi: 10.11938/cjmr20150220

• 研究简报 • 上一篇    下一篇

一种核磁共振波谱谱峰对齐及谱峰提取的方法

刘悦1,2a,高运苓2a,程吉2,3,王杰2*,徐富强1,2*   

  1. 1. 武汉光电国家实验室(筹),华中科技大学,武汉 430074;
    2. 波谱与原子分子物理国家重点实验室,武汉磁共振中心(中国科学院 武汉物理与数学研究所),武汉 430071;
    3. 生命科学学院 武汉大学,武汉 430072
  • 收稿日期:2015-03-10 修回日期:2015-05-09 出版日期:2015-06-05 发布日期:2015-06-05
  • 作者简介:*通讯联系人:王杰, E-mail: jie.wang@wipm.ac.cn; 徐富强, 电话: +86-27-87197091, E-mail: fuqiang.xu@wipm.ac.cn. a 并列第一作者.
  • 基金资助:

    The National Natural Science Foundation of China (21105116).

A Processing Method for Spectrum Alignment and Peak Extraction for NMR Spectra

LIU Yue1,2a,GAO Yun-ling2a,CHENG Ji2,3,WANG Jie2*,XU Fu-qiang1,2*   

  1. 1. Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074;
    2. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan (Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences), Wuhan 430071;
    3. College of Life Science, Wuhan University, Wuhan 430072
  • Received:2015-03-10 Revised:2015-05-09 Online:2015-06-05 Published:2015-06-05
  • About author:LIU Yue (1990-), female, born in Tonghua, Jilin, PhD. candidate. Her research focuses on MRI, E-mail: yearinglydhr@qq.com. *Corresponding authors: WANG Jie, E-mail: jie.wang@wipm.ac.cn; XU Fu-qiang, Tel: +86-27-87197091, E-mail: fuqiang.xu@wipm.ac.cn. a These authors contributed equally to this work.
  • Supported by:

    The National Natural Science Foundation of China (21105116).

摘要:

在代谢组学研究方法中,对一组具有生物学意义且平行的核磁共振波谱数据进行处理是其方法研究的关键,其中包含谱峰对齐、谱峰提取、噪音去除等几个步骤.该文提出了一种全新且快速有效的核磁共振波谱批量处理方法.其原理主要为:在保持波谱形状不发生变化的同时,通过平移目标谱使其与参考谱达到最大程度的相关,从而实现谱峰对齐及利用谱峰最大值的判断来实现谱峰变量的提取.此外,该文还结合大鼠尿样和血样的分析结果,详细地说明了算法的准确性及其它优点.该文所涉及的算法是基于Matlab 程序进行编译的,可以结合不同实验进行改编,具有良好的扩展性.

关键词: 波谱处理, 谱峰对齐, 谱峰提取, 噪音去除, Matlab

Abstract:

The method for NMR spectra post processing, especially for a set of parallel biological NMR spectra, is crucial in metabolomics studies. Here, an efficient spectra post processing method for peak alignment and peak extraction is proposed, which not only did well in accurate results with high resolution but also had advantages in batch processing and time consumption. The spectrum alignment was completed with the shift of the spectra without changing the profiles of the NMR spectra, and the results were evaluated by the regression coefficient R. The peak extraction step was achieved by repeated searching the maximum value in the NMR spectrum, and was a prerequisite for metabolomics analysis. The extraction of all relevant peaks contained in the complex mixture spectra, rid of any non-significant signal could be easily applied to the statistical analysis. This new approach was applied to a set of 1H NMR spectra of rat plasma and urine to demonstrate the efficiency of the method. The whole theory is compiled in Matlab, and the implementation code is available upon request.

Key words: spectrum processing, spectrum alignment, peak extraction, batch processing, Matlab

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