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Gut Microbes. 2021 Jan-Dec;13(1):1-22. doi: 10.1080/19490976.2021.1888673.

Links between gut microbiome composition and fatty liver disease in a large population sample.

Gut microbes

Matti O Ruuskanen, Fredrik Åberg, Ville Männistö, Aki S Havulinna, Guillaume Méric, Yang Liu, Rohit Loomba, Yoshiki Vázquez-Baeza, Anupriya Tripathi, Liisa M Valsta, Michael Inouye, Pekka Jousilahti, Veikko Salomaa, Mohit Jain, Rob Knight, Leo Lahti, Teemu J Niiranen

Affiliations

  1. Department of Internal Medicine, University of Turku, Turku, Finland.
  2. Department of Public Health Solutions, Finnish Institute for Health and Welfare, Helsinki, Finland.
  3. Transplantation and Liver Surgery Clinic, Helsinki University Hospital, University of Helsinki, Helsinki, Finland.
  4. Transplant Institute, Sahlgrenska University Hospital, Gothenburg, Sweden.
  5. Department of Medicine, Kuopio University Hospital, University of Eastern Finland, Kuopio, Finland.
  6. Department of Experimental Vascular Medicine, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.
  7. Institute for Molecular Medicine Finland, FIMM - HiLIFE, Helsinki, Finland.
  8. Cambridge Baker Systems Genomics Initiative, Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia.
  9. Department of Infectious Diseases, Central Clinical School, Monash University, Melbourne, Victoria, Australia.
  10. Department of Clinical Pathology, The University of Melbourne, Melbourne, Victoria, Australia.
  11. Department of Medicine, NAFLD Research Center, La Jolla, CA, USA.
  12. Department of Medicine, University of California San Diego, La Jolla, CA, USA.
  13. Center for Microbiome Innovation, Jacobs School of Engineering, University of California San Diego, La Jolla, CA, USA.
  14. Collaborative Mass Spectrometry Innovation Center, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA, USA.
  15. Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA, USA.
  16. Division of Biological Sciences, University of California San Diego, La Jolla, CA, USA.
  17. Department of Public Health and Primary Care, Cambridge University, Cambridge, UK.
  18. Department of Pharmacology, University of California San Diego, La Jolla, California, USA.
  19. Department of Pediatrics, School of Medicine, University of California San Diego, La Jolla, California, USA.
  20. Department of Computer Science & Engineering, University of California San Diego, La Jolla, California, USA.
  21. Deparment of Computing, University of Turku, Turku, Finland.
  22. Division of Medicine, Turku University Hospital, Turku, Finland.

PMID: 33651661 PMCID: PMC7928040 DOI: 10.1080/19490976.2021.1888673

Abstract

Fatty liver disease is the most common liver disease in the world. Its connection with the gut microbiome has been known for at least 80 y, but this association remains mostly unstudied in the general population because of underdiagnosis and small sample sizes. To address this knowledge gap, we studied the link between the Fatty Liver Index (FLI), a well-established proxy for fatty liver disease, and gut microbiome composition in a representative, ethnically homogeneous population sample of 6,269 Finnish participants. We based our models on biometric covariates and gut microbiome compositions from shallow metagenome sequencing. Our classification models could discriminate between individuals with a high FLI (≥60, indicates likely liver steatosis) and low FLI (<60) in internal cross-region validation, consisting of 30% of the data not used in model training, with an average AUC of 0.75 and AUPRC of 0.56 (baseline at 0.30). In addition to age and sex, our models included differences in 11 microbial groups from class

Keywords: Metagenomics; fatty liver; fatty liver index; human gut; population sample

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