Associations of Fecal Short Chain Fatty Acids With Colonic Transit, Fecal Bile Acid, and Food Intake in Irritable Bowel Syndrome

dc.contributor.authorWaseem, Mohammed Ray
dc.contributor.authorShin, Andrea
dc.contributor.authorSiwiec, Robert
dc.contributor.authorJames-Stevenson, Toyia
dc.contributor.authorBohm, Matthew
dc.contributor.authorRogers, Nicholas
dc.contributor.authorWo, John
dc.contributor.authorWaseem, Lina
dc.contributor.authorGupta, Anita
dc.contributor.authorJarrett, Megan
dc.contributor.authorKadariya, Jhalka
dc.contributor.authorXu, Huiping
dc.contributor.departmentMedicine, School of Medicine
dc.date.accessioned2023-10-20T12:19:34Z
dc.date.available2023-10-20T12:19:34Z
dc.date.issued2023-01-01
dc.description.abstractIntroduction: Short-chain fatty acids (SCFAs) correlate with colonic transit time (CTT) and may influence irritable bowel syndrome (IBS) pathophysiology. However, the clinical significance of fecal SCFAs, relationships between SCFAs and other metabolites (bile acids [BAs]), and real-time diet effects on SCFAs in IBS are uncertain. The aim was to evaluate fecal SCFA associations with IBS phenotype and mechanisms and explore effects of real-time diet. Methods: We conducted a prospective observational study of fecal SCFA, BAs, and CTT in healthy controls (HCs) and participants with IBS. We compared study end points across groups, analyzed relationships between end points, and evaluated the discriminative ability of SCFAs. Diet effects were explored in participants with dietary data. Results: Among 21 HCs and 43 participants with IBS, fecal SCFAs (total, individual) were inversely correlated with overall (all P < 0.01) and segmental (all P < 0.05) CTT; similar associations were observed within HC and IBS groups. The acetate-to-butyrate ratio correlated with slower overall and left CTT in all and in HCs (both P < 0.01). SCFAs (total, acetate) correlated with BAs (total, % primary) in all participants and in those with IBS with diarrhea. Logistic regression analyses demonstrated associations of acetate with slower transit (odds ratio = 0.988, P = 0.002) and BA diarrhea (BAD; odds ratio = 1.014, P = 0.001). Acetate accurately predicted delayed CTT (area under the receiving operating characteristic curve = 0.84) and BAD (area under the receiver operating characteristic curve = 0.79). Adjusting for diet strengthened correlations of total SCFAs with overall CTT ( R = [-0.46], P = 0.04) and SCFAs with transverse CTT (all P < 0.05). Discussion: Fecal SCFAs correlate with CTT and fecal BAs and reliably exclude delayed CTT and BAD. Accounting for diet strengthens SCFA associations with transit.
dc.eprint.versionFinal published version
dc.identifier.citationWaseem MR, Shin A, Siwiec R, et al. Associations of Fecal Short Chain Fatty Acids With Colonic Transit, Fecal Bile Acid, and Food Intake in Irritable Bowel Syndrome. Clin Transl Gastroenterol. 2023;14(1):e00541. Published 2023 Jan 1. doi:10.14309/ctg.0000000000000541
dc.identifier.urihttps://hdl.handle.net/1805/36526
dc.language.isoen_US
dc.publisherWolters Kluwer
dc.relation.isversionof10.14309/ctg.0000000000000541
dc.relation.journalClinical and Translational Gastroenterology
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.sourcePMC
dc.subjectDiarrhea
dc.subjectAcetates
dc.subjectVolatile fatty acids
dc.subjectIrritable bowel syndrome
dc.subjectEating
dc.titleAssociations of Fecal Short Chain Fatty Acids With Colonic Transit, Fecal Bile Acid, and Food Intake in Irritable Bowel Syndrome
dc.typeArticle
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