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Original Research ARTICLE Provisionally accepted The full-text will be published soon. Notify me

Front. Physiol. | doi: 10.3389/fphys.2019.01109

NMR metabolomics and random forests models to identify potential plasma biomarkers of blood stasis syndrome with Coronary heart disease patients

  • 1Third Xiangya Hospital, Central South University, China
  • 2Xiangya Hospital, Central South University, China

Background: Coronary heart disease (CHD) remains highly prevalent and is one of the largest causes of death, worldwide. Blood stasis syndrome (BSS) is the main syndrome associated with CHD. However, the underlying biological basis of BSS with CHD have not yet been fully understood.
Materials and methods: We proposed a metabolomics method based on 1H-NMR and random forest (RF) models to elucidate the underlying biological basis of BSS with CHD. First of all, 58 cases of CHD patients, including 27 BSS and 31 phlegm syndrome (PS), and 26 volunteers were derived from Xiangya Hospital affiliated to Central South University. 1mL venous blood sample was collected for NMR analysis. Secondly, principal component analysis (PCA), partial least squares discrimination analysis (PLS-DA) and RF was applied to observe the classification of each group, respectively. Finally, RF and MDS were utilized to discover the plasma potential biomarkers in CHD patients and CHD-BSS patients.
Results: The models constructed by RF could visually discriminate BSS from PS in CHD patients. Simultaneously, we obtained 12 characteristic metabolites, including lysine, glutamine, taurine, tyrosine, phenylalanine, histidine, lipid, citrate, choline, lactate, α-Glucose, β-Glucose related to the CHD patients, and Choline, β-glucose, α-glucose and tyrosine were considered as potential biomarkers of CHD-BSS.
Conclusion: The combining 1H-NMR profiling with RF models was a useful approach to analyze complex metabolomics data.

Keywords: coronary heart disease, blood stasis syndrome, Metabolomics, random forests (RFs), Systems Biology

Received: 10 Apr 2019; Accepted: 12 Aug 2019.

Copyright: © 2019 Zhao, Qiu, Wang, Li and Wang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence:
Mx. Ruo-Meng Li, Third Xiangya Hospital, Central South University, Changsha, 410013, Hunan Province, China,
Prof. Dong-Sheng Wang, Xiangya Hospital, Central South University, Changsha, China,