title: Metabolic profiling of plasma in overweight/obese and lean men using ultra performance liquid chromatography and Q-TOF mass spectrometry (UPLC-Q-TOF MS).
abstract: Obesity is currently epidemic in many countries worldwide and is strongly related to diabetes and cardiovascular disease. This study investigated the differences in metabolomic profiling between overweight/obese and normal-weight men. Overweight/obese (n=30) and age-matched, normal-weight men (n=30) were included. Anthropometric parameters, conventional metabolites, and biomarkers were measured. Metabolomic profiling was analyzed with UPLC-Q-TOF MS. Overweight/obese men showed higher levels of HOMA-IR, triglycerides, total cholesterol, and LDL-cholesterol, and lower levels of HDL-cholesterol and adiponectin than lean men. Overweight/obese men showed higher proportion of stearic acid and lower proportion of oleic acid in serum phospholipids. Additionally, overweight/obese individuals showed higher fat intake and lower ratio of polyunsaturated fatty acids to saturated fatty acids. We identified three lyso-phosphatidylcholine (lysoPC) as potential plasma markers and confirmed eight known metabolites for overweight/obesity men. Especially, overweight/obese subjects showed higher levels of lysoPC C14:0 and lysoPC C18:0 and lower levels of lysoPC C18:1 than lean subjects. Results confirmed abnormal metabolism of two branched-chain amino acids, two aromatic amino acids, and fatty acid synthesis and oxidation in overweight/obese men. Additionally, the amount of dietary saturated fat may influence the proportion of saturated fatty acids in serum phospholipids and the degree of saturation of the constituent acyl group of plasma lysoPC.
authors.affiliation: Yonsei University Research Institute of Science for Aging, Laboratory of Clinical Nutrigenetics/Nutrigenomics, Department of Food and Nutrition, Brain Korea 21 Project, College of Human Ecology, Yonsei University, Seoul, Korea.
authors.forename: Ji Young
authors.initials: JY
authors.lastname: Kim
authors.forename: Ju Yeon
authors.initials: JY
authors.lastname: Park
authors.forename: Oh Yoen
authors.initials: OY
authors.lastname: Kim
authors.forename: Bo Mi
authors.initials: BM
authors.lastname: Ham
authors.forename: Hyun-Jin
authors.initials: HJ
authors.lastname: Kim
authors.forename: Dae Young
authors.initials: DY
authors.lastname: Kwon
authors.forename: Yangsoo
authors.initials: Y
authors.lastname: Jang
authors.forename: Jong Ho
authors.initials: JH
authors.lastname: Lee
mesh_terms: D000328:Adult; D015415:Biomarkers / Q000097:blood / Q000737:chemistry; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D016002:Discriminant Analysis; D002149:Energy Intake; D005227:Fatty Acids / Q000097:blood / Q000737:chemistry; D006801:Humans; D008297:Male; D055442:Metabolome; D055432:Metabolomics / Q000379:methods*; D008875:Middle Aged; D050177:Overweight / Q000097:blood*; D010743:Phospholipids / Q000097:blood / Q000737:chemistry; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization / Q000379:methods*; D018709:Statistics, Nonparametric; D013851:Thinness / Q000097:blood*
chemical_list: D015415:Biomarkers; D005227:Fatty Acids; D010743:Phospholipids