Metabolic phenotyping of the Crohn's disease-like IBD etiopathology in the TNF(ΔARE/WT) mouse model.
The underlying biochemical consequences of inflammatory bowel disease (IBD) on the systemic and gastrointestinal metabolism have not yet been fully elucidated but could help to better understand the disease pathogenesis and to identify tissue-specific markers associated with the different disease stages. Here, we applied a metabonomic approach to monitor metabolic events associated with the gradual development of Crohn's disease (CD)-like ileitis in the TNF(ΔARE/WT) mouse model. Metabolic profiles of different intestinal compartments from the age of 4 up to 24 weeks were generated by combining proton nuclear magnetic resonance ((1)H NMR) spectroscopy and liquid chromatography-mass spectrometry (LC-MS). From 8 weeks onward, mice developed CD similar to the immune and tissue-related phenotype of human CD with ileal involvement, including ileal histological abnormalities, reduced fat mass and body weight, as well as hallmarks of malabsorption with higher energy wasting. The metabonomic approach highlighted shifts in the intestinal lipid metabolism concomitant to the histological onset of inflammation. Moreover, the advanced disease status was characterized by a significantly altered metabolism of cholesterol, triglycerides, phospholipids, plasmalogens, and sphingomyelins in the inflamed tissue (ileum) and the adjacent intestinal parts (proximal colon). These results describe different biological processes associated with the disease onset, including modifications of the general cell membrane composition, alteration of energy homeostasis, and finally the generation of inflammatory lipid mediators. Taken together, this provides novel insights into IBD-related alterations of specific lipid-dependant processes during inflammatory states.
ZIEL-Research Center for Nutrition and Food Science, CDD-Center for Diet and Disease, Technische Universität München, Gregor-Mendel-Strasse 2, 85350 Freising-Weihenstephan, Germany.
Pia
P
Baur
François-Pierre
FP
Martin
Lisa
L
Gruber
Nabil
N
Bosco
Viral
V
Brahmbhatt
Sebastiano
S
Collino
Philippe
P
Guy
Ivan
I
Montoliu
Jan
J
Rozman
Martin
M
Klingenspor
Isabelle
I
Tavazzi
Anita
A
Thorimbert
Serge
S
Rezzi
Sunil
S
Kochhar
Jalil
J
Benyacoub
George
G
Kollias
Dirk
D
Haller
D000273:Adipose Tissue / Q000737:chemistry; D000818:Animals; D001823:Body Composition; D002462:Cell Membrane / Q000737:chemistry; D002853:Chromatography, Liquid / Q000379:methods; D003424:Crohn Disease / Q000209:etiology / Q000473:pathology; D004195:Disease Models, Animal; D004734:Energy Metabolism; D007079:Ileitis / Q000209:etiology* / Q000235:genetics / Q000473:pathology; D018836:Inflammation Mediators / Q000032:analysis / Q000737:chemistry; D015212:Inflammatory Bowel Diseases / Q000209:etiology / Q000235:genetics / Q000473:pathology*; D050356:Lipid Metabolism; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D013058:Mass Spectrometry / Q000379:methods; D055442:Metabolome; D055432:Metabolomics / Q000379:methods*; D051379:Mice; D008810:Mice, Inbred C57BL; D010641:Phenotype; D014409:Tumor Necrosis Factor-alpha / Q000737:chemistry / Q000235:genetics*; D015431:Weight Loss
D018836:Inflammation Mediators; D014409:Tumor Necrosis Factor-alpha