Ken H Liu1, Douglas I Walker, Karan Uppal, ViLinh Tran, Patricia Rohrbeck, Timothy M Mallon, Dean P Jones. 1. Clinical Biomarkers Laboratory, Division of Pulmonary, Allergy, and Critical Care Medicine, Emory School of Medicine, Atlanta, Georgia (Mr Liu, Mr Walker, Dr Uppal, Tran, Dr Jones); Department of Civil and Environmental Engineering, Tufts University, Medford, Massachusetts (Mr Walker); 779th Aerospace Medicine Squadron, 79th Medical Wing, Joint Base Andrews, MD (Dr Rohrbeck); and Professor, Department of Preventive Medicine and Biostatistics, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD 20814 (Dr Mallon).
Abstract
OBJECTIVE: The aim of this study was to maximize detection of serum metabolites with high-resolution metabolomics (HRM). METHODS: Department of Defense Serum Repository (DoDSR) samples were analyzed using ultrahigh resolution mass spectrometry with three complementary chromatographic phases and four ionization modes. Chemical coverage was evaluated by number of ions detected and accurate mass matches to a human metabolomics database. RESULTS: Individual HRM platforms provided accurate mass matches for up to 58% of the KEGG metabolite database. Combining two analytical methods increased matches to 72% and included metabolites in most major human metabolic pathways and chemical classes. Detection and feature quality varied by analytical configuration. CONCLUSIONS: Dual chromatography HRM with positive and negative electrospray ionization provides an effective generalized method for metabolic assessment of military personnel.
OBJECTIVE: The aim of this study was to maximize detection of serum metabolites with high-resolution metabolomics (HRM). METHODS: Department of Defense Serum Repository (DoDSR) samples were analyzed using ultrahigh resolution mass spectrometry with three complementary chromatographic phases and four ionization modes. Chemical coverage was evaluated by number of ions detected and accurate mass matches to a human metabolomics database. RESULTS: Individual HRM platforms provided accurate mass matches for up to 58% of the KEGG metabolite database. Combining two analytical methods increased matches to 72% and included metabolites in most major human metabolic pathways and chemical classes. Detection and feature quality varied by analytical configuration. CONCLUSIONS: Dual chromatography HRM with positive and negative electrospray ionization provides an effective generalized method for metabolic assessment of military personnel.
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