title: Serum bile acids and GLP-1 decrease following telemetric induced weight loss: results of a randomized controlled trial.
abstract: Bile acids (BAs) are increasingly recognised as metabolic regulators, potentially improving insulin sensitivity following bariatric surgery. However, physiological relevance of such observations remains unknown. Hence, we analysed serum BA composition and associated gut-derived hormone levels following lifestyle-induced weight loss in individuals with metabolic syndrome (MetS). 74 non-smoking men (45-55 yr) with MetS were randomised to a lifestyle-induced weight loss program (supervision via telemonitoring) or to a control arm. Before and after a 6 months intervention period clinical and laboratory parameters, body composition, serum BA profile, FGF-19, and GLP-1 concentrations were determined in fasting blood samples. 30 participants in the control and 33 participants in the treatment arm completed the study and were included in the data analysis. In participants of the treatment arm lifestyle-induced weight loss resulted in markedly improved insulin sensitivity. Serum levels of BA species and total GLP-1 decreased, while FGF-19 remained stable. Serum BA composition changed towards an increased 12α-hydroxylated/non-12α-hydroxylated ratio. None of these parameters changed in participants of the control arm. Our results demonstrate that improved metabolic control by lifestyle modifications lowers serum levels of BAs and GLP-1 and changes serum BA composition towards an increased 12α/non-12α ratio (ICTRP Trial Number: U1111-1158-3672).
authors.affiliation: Institute of Clinical Chemistry and Pathobiochemistry, Otto-von-Guericke University, Magdeburg, Germany.
authors.forename: Ronald
authors.initials: R
authors.lastname: Biemann
authors.affiliation: Institute of Clinical Chemistry and Pathobiochemistry, Otto-von-Guericke University, Magdeburg, Germany.
authors.forename: Marina
authors.initials: M
authors.lastname: Penner
authors.affiliation: Institute of Clinical Chemistry and Pathobiochemistry, Otto-von-Guericke University, Magdeburg, Germany.
authors.forename: Katrin
authors.initials: K
authors.lastname: Borucki
authors.affiliation: Institute of Clinical Chemistry and Pathobiochemistry, Otto-von-Guericke University, Magdeburg, Germany.
authors.forename: Sabine
authors.initials: S
authors.lastname: Westphal
authors.affiliation: Institute of Clinical Chemistry and Pathobiochemistry, Otto-von-Guericke University, Magdeburg, Germany.
authors.forename: Claus
authors.initials: C
authors.lastname: Luley
authors.affiliation: Institute of Clinical Chemistry and Pathobiochemistry, Otto-von-Guericke University, Magdeburg, Germany.
authors.forename: Raik
authors.initials: R
authors.lastname: Rönicke
authors.affiliation: Institute of Clinical Chemistry and Pathobiochemistry, Otto-von-Guericke University, Magdeburg, Germany.
authors.forename: Kathleen
authors.initials: K
authors.lastname: Biemann
authors.affiliation: The Federal Institute for Risk Assessment, Department of Food Safety, Berlin, Germany.|Institute of Social Medicine, Epidemiology, and Health Economics, Charité University Medical Center, Berlin, Germany.
authors.forename: Cornelia
authors.initials: C
authors.lastname: Weikert
authors.affiliation: Institute for Biometrics and Medical Informatics, Otto-von-Guericke University, Magdeburg, Germany.
authors.forename: Anke
authors.initials: A
authors.lastname: Lux
authors.affiliation: IBBL (Integrated BioBank of Luxembourg), Luxemburg City, Luxembourg.
authors.forename: Nikolai
authors.initials: N
authors.lastname: Goncharenko
authors.affiliation: Sahlgrenska Academy, Institute of Medicine, Department of Molecular and Clinical Medicine, University of Gothenburg, Gothenburg, Sweden.
authors.forename: Hanns-Ulrich
authors.initials: HU
authors.lastname: Marschall
authors.affiliation: Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg.|Department of Internal Medicine II, Saarland University Medical Center at Homburg/Saar, Homburg, Germany.
authors.forename: Jochen G
authors.initials: JG
authors.lastname: Schneider
authors.affiliation: Institute of Clinical Chemistry and Pathobiochemistry, Otto-von-Guericke University, Magdeburg, Germany.
authors.forename: Berend
authors.initials: B
authors.lastname: Isermann
mesh_terms: D001647:Bile Acids and Salts / Q000097:blood*; D001786:Blood Glucose / Q000378:metabolism; D015992:Body Mass Index; D001835:Body Weight / Q000502:physiology; D005215:Fasting / Q000097:blood; D052216:Glucagon-Like Peptide 1 / Q000097:blood*; D006801:Humans; D007328:Insulin / Q000097:blood; D007333:Insulin Resistance / Q000502:physiology; D008297:Male; D024821:Metabolic Syndrome / Q000097:blood; D008875:Middle Aged; D011446:Prospective Studies; D015431:Weight Loss / Q000502:physiology*
chemical_list: D001647:Bile Acids and Salts; D001786:Blood Glucose; D007328:Insulin; D052216:Glucagon-Like Peptide 1