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Characteristics of fecal metabolic profiles in patients with irritable bowel syndrome with predominant diarrhea investigated using 1 H‐NMR coupled with multivariate statistical analysis
Author(s) -
Lee Jae Soung,
Kim SeokYoung,
Chun Yoon Shik,
Chun YoungJin,
Shin Seung Yong,
Choi Chang Hwan,
Choi HyungKyoon
Publication year - 2020
Publication title -
neurogastroenterology and motility
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.489
H-Index - 105
eISSN - 1365-2982
pISSN - 1350-1925
DOI - 10.1111/nmo.13830
Subject(s) - irritable bowel syndrome , diarrhea , feces , gastroenterology , metabolite , metabolomics , medicine , multivariate analysis , nuclear magnetic resonance spectroscopy , chemistry , biology , chromatography , microbiology and biotechnology , stereochemistry
Background Gut microbiota are known to be closely related to irritable bowel syndrome (IBS). However, not much is known about characteristic fecal metabolic profiles of IBS. We aimed to characterize fecal metabolites in patients with IBS with predominant diarrhea (IBS‐D) using 1 H‐nuclear magnetic resonance ( 1 H‐NMR) spectroscopy. Methods In this study, we enrolled 29 patients diagnosed with IBS‐D according to the Rome IV criteria, 22 healthy controls (HC) and 11 HC administered laxatives (HC‐L) in the age group of 20‐69 year. The usual diet of the patients and HC was maintained, their fecal samples were collected and investigated by NMR‐based global metabolic profiling coupled with multivariate statistical analysis. Results We detected 55 metabolites in 1 H‐NMR spectra of fecal samples: four amines, 16 amino acids, six fatty acids, eight organic acids, three sugars, and 18 other compounds. Orthogonal partial least square‐discriminant analysis derived score plots showed clear separation between the IBS‐D group and the HC and HC‐L groups. Among the 55 metabolites identified, we found five disease‐relevant potential biomarkers distinguishing the IBS‐D from the HC, namely, cadaverine, putrescine, threonine, tryptophan, and phenylalanine. Conclusions The patients with IBS‐D were clearly differentiated from the HC and HC‐L by fecal metabolite analysis using 1 H‐NMR spectroscopy, and five fecal metabolites characteristic of IBS‐D were found. The findings of this study could be used to develop alternative and complementary diagnostic methods and as a source of fundamental information for developing novel therapies for IBS‐D.