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AIM:To investigate the pathophysiology of irritable bowel syndrome(IBS)by comparing the global mucosal metabolic profiles of IBS patients with those of healthy controls.METHODS:Fifteen IBS patients fulfilling the Rome Ⅱcriteria,and nine healthy volunteers were included in the study.A combined lipidomics(UPLC/MS)and metabolomics(GC×GC-TOF)approach was used to achieve global metabolic profiles of mucosal biopsies from the ascending colon.RESULTS:Overall,lipid levels were elevated in patients with IBS.The most significant upregulation was seen for pro-inflammatory lysophosphatidylcholines.Other lipid groups that were significantly upregulated in IBS patients were lipotoxic ceramides,glycosphingolipids,and di-and triacylglycerols.Among the metabolites,the cyclic ester 2(3H)-furanone was almost 14-fold upregulated in IBS patients compared to healthy subjects(P=0.03).CONCLUSION:IBS mucosa is characterised by a distinct pro-inflammatory and lipotoxic metabolic profile.Especially,there was an increase in several lipid species such as lysophospholipids and ceramides.
To investigate the pathophysiology of irritable bowel syndrome (IBS) by comparing the global mucosal metabolic profiles of IBS patients with those of healthy controls. METHODS: Fifteen IBS patients fulfilling the Rome II condition, and nine healthy volunteers were included in the study. A combined lipidomics (UPLC / MS) and metabolomics (GC × GC-TOF) approach was used to achieve global metabolic profiles of mucosal biopsies from the ascending colon. RESULTS: Overall, lipid levels were elevated in patients with IBS. The most significant upregulation was seen for pro-inflammatory lysophosphatidylcholines. Other lipid groups that were significantly upregulated in IBS patients were lipotoxic ceramides, glycosphingolipids, and di-and triacylglycerols. Amm the metabolites, the cyclic ester 2 (3H) -furanone was almost 14-fold upregulated in IBS patients compared to healthy subjects (P = 0.03) .CONCLUSION: IBS mucosa is characterised by a distinct pro-inflammatory and lipotoxic metabolic profile. Especially, there was an increase in several lipid species such as lysophospholipids and ceramides.