The secondary bile acid isoursodeoxycholate correlates with post-prandial lipemia, inflammation, and appetite and changes post-bariatric surgery

Panayiotis Louca, Abraham S. Meijnikman, Ana Nogal, Francesco Asnicar, Ilias Attaye, Amrita Vijay, Afroditi Kouraki, Alessia Visconti, Kari Wong, Sarah E. Berry, Emily R. Leeming, Olatz Mompeo, Francesca Tettamanzi, Andrei-Florin Baleanu, Mario Falchi, George Hadjigeorgiou, Jonathan Wolf, Yair I. Z. Acherman, Arnold W. van de Laar, Victor E. A. GerdesGregory A. Michelotti, Paul W. Franks, Nicola Segata, Massimo Mangino, Tim D. Spector, William J. Bulsiewicz, Max Nieuwdorp, Ana M. Valdes, Cristina Menni

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2 Citations (Scopus)

Abstract

Primary and secondary bile acids (BAs) influence metabolism and inflammation, and the gut microbiome modulates levels of BAs. We systematically explore the host genetic, gut microbial, and habitual dietary contribution to a panel of 19 serum and 15 stool BAs in two population-based cohorts (TwinsUK, n = 2,382; ZOE PREDICT-1, n = 327) and assess changes post-bariatric surgery and after nutritional interventions. We report that BAs have a moderately heritable genetic component, and the gut microbiome accurately predicts their levels in serum and stool. The secondary BA isoursodeoxycholate (isoUDCA) can be explained mostly by gut microbes (area under the receiver operating characteristic curve [AUC] = ∼80%) and associates with post-prandial lipemia and inflammation (GlycA). Furthermore, circulating isoUDCA decreases significantly 1 year after bariatric surgery (β = −0.72, p = 1 × 10−5) and in response to fiber supplementation (β = −0.37, p < 0.03) but not omega-3 supplementation. In healthy individuals, isoUDCA fasting levels correlate with pre-meal appetite (p < 1 × 10−4). Our findings indicate an important role for isoUDCA in lipid metabolism, appetite, and, potentially, cardiometabolic risk.

Original languageEnglish
Article number100993
JournalCell Reports Medicine
Volume4
Issue number4
DOIs
Publication statusPublished - 18 Apr 2023

Keywords

  • bariatric surgery
  • bile acids
  • liver function
  • post-prandial
  • triglycerides

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