Development of a Highly Sensitive Ultra-High-Performance Liquid Chromatography Coupled to Electrospray Ionization Tandem Mass Spectrometry Quantitation Method for Fecal Bile Acids and Application on Crohn's Disease Studies.
In addition to their important role in fat digestion, bile acids are increasingly being used as markers for various diseases. The large diversity of bile acids results from the conversion of primary and conjugated bile acids into secondary bile acids by deconjugation and dehydroxylation reactions mediated by the intestinal microbiota. Here, we describe a fast and sensitive liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for absolute quantitation of 45 bile acids in human or mouse feces in combination with a simple workup and extraction procedure. Method validation outlined excellent limits of detection and quantitation, linearity, selectivity, recovery, extraction loss, and precision. To investigate the connection between microbiome alterations and bile acid metabolism, the method was applied on a Crohn's disease study including patients with histologically documented active disease or remission as well as on a model using humanized mice. As the complex mechanism including genetic and environmental factors leading to the development of Crohn's disease is so far not completely understood, the study investigates the microbial metabolism of bile acids and the potential use of bile acid profiles to predict disease state.
['Reiter|Sinah|S|', 'Dunkel|Andreas|A|http://orcid.org/0000-0002-4445-6144', 'Metwaly|Amira|A|', 'Panes|Julian|J|', 'Salas|Azucena|A|', 'Haller|Dirk|D|', 'Hofmann|Thomas|T|http://orcid.org/0000-0003-4057-7165']
D000818:Animals D001647:Bile Acids and Salts D002851:Chromatography, High Pressure Liquid D002853:Chromatography, Liquid D003424:Crohn Disease D005243:Feces D006801:Humans D051379:Mice D015203:Reproducibility of Results D021241:Spectrometry, Mass, Electrospray Ionization D053719:Tandem Mass Spectrometry
bile acids method validation Crohn’s disease UHPLC-ESI-LC-MS/MS targeted metabolite profiling