Chinese Journal of Magnetic Resonance ›› 2007, Vol. 24 ›› Issue (4): 381-393.

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A New Data Processing Method for  Metabonomic and Its Application in a Study of  Diabetes

DONG Ji-yang1,  XU Le1, CAO Hong-ting1, DAI Xiao-xia2, LI Xue-jun3, YANG Shu-yu3, CHEN Zhong1*   

  1. 1.Department of Physics, Xiamen University, Xiamen 361005, China; 
    2.School of Medicine, Xiamen University, Xiamen 361005, China;
    3.The Xiamen First Hospital, Xiamen 361005, China
  • Received:2007-08-28 Online:2007-12-05 Published:2007-12-05
  • Supported by:

    福建省自然科学基金(T0750015)和厦门市重大疾病攻关研究基金(3502Z20051027)资助项目.

Abstract:

Multivariate statistical methods are frequently used in nuclear magnetic resonance (NMR)-based metabonomic researches to analyze NMR spectra of biofluids. Based on the fact that the NMR spectrum of a given sample are a sum of the NMR signals from all constituting ingredients, we developed a nonnegative matrix factorization (NMF) method, capable of finding parts-based and linear representations of non-negative data, for analyzing the data acquired in NMR-based metabonomic studies. Detail comparisons were made between the NMF method and the commonly use principal component analysis (PCA) method by employing the two methods to discriminate the urine and serum spectra of type-2 diabetic patients from those of the healthy controls. It was shown that, compared to the PCA method, the NMF method is a more effective and accurate method for processing NMR spectra acquired in the metabonomic studies, partially due to its unique features such as the non-negative constraints and part-based representation. The disadvantages of the PCA method were also analyzed and discussed.

Key words: NMR, metabonomics, type 2 diabetes, non-negative matrix factorization, principle component analysis

CLC Number: