{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,11]],"date-time":"2026-04-11T07:12:30Z","timestamp":1775891550466,"version":"3.50.1"},"reference-count":62,"publisher":"BMJ","issue":"3","license":[{"start":{"date-parts":[[2025,8,22]],"date-time":"2025-08-22T00:00:00Z","timestamp":1755820800000},"content-version":"unspecified","delay-in-days":52,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"funder":[{"name":"Bundesministerium f\u00fcr Forschung, Technologie und Raumfahrtf\u00fcr. Forschung, Technologie und Raumfahrt (BMFTR) Cluster4Future CurATime","award":["03ZU1202CB"],"award-info":[{"award-number":["03ZU1202CB"]}]},{"DOI":"10.13039\/501100003130","name":"Fonds Wetenschappelijk Onderzoek","doi-asserted-by":"publisher","award":["V465523N"],"award-info":[{"award-number":["V465523N"]}],"id":[{"id":"10.13039\/501100003130","id-type":"DOI","asserted-by":"publisher"}]},{"name":"FCT - Portuguese Foundation for Science and Technology, under the scope of the Cardiovascular R&D Center \u2013 UnIC","award":["UIDB\/00051\/2020 and UIDP\/00051\/2020"],"award-info":[{"award-number":["UIDB\/00051\/2020 and UIDP\/00051\/2020"]}]}],"content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["egastro"],"accepted":{"date-parts":[[2025,7,21]]},"published-print":{"date-parts":[[2025,7]]},"abstract":"<jats:sec>\n                  <jats:title>Background<\/jats:title>\n                  <jats:p>Metabolic dysfunction-associated steatotic liver disease (MASLD) is the leading cause of chronic liver disease globally, with rising prevalence linked to metabolic syndrome (MetS). Excessive liver fat accumulation (steatosis) worsens disease progression and MASLD prognosis. Moreover, gut microbiota dysbiosis might promote steatosis, accelerating the disease progression to severe stages. Identifying gut microbiota signatures specific to steatosis severity might improve its diagnosis and inform personalised interventions in MASLD. This study aimed to characterise associations between gut microbiota composition and hepatic steatosis severity in a cohort of patients with MASLD\/MetS. Ultimately, we aimed to assess the potential for microbiota features to enhance the diagnosis of severe steatosis.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Methods<\/jats:title>\n                  <jats:p>A cross-sectional cohort of 61 patients with MetS with extensive clinical history was recruited at different stages of MASLD. Transient elastography was used to evaluate liver fibrosis and steatosis severity. Participants\u2019 faecal microbiota were profiled using 16S rRNA gene sequencing. Statistical analyses first identified correlations between microbiota profiles and patients\u2019 phenotypes, while disentangling important confounders such as medication. Identified features were then used to build predictive models for diagnosing severe steatosis.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Results<\/jats:title>\n                  <jats:p>High steatosis severity was distinctly associated with a higher prevalence of the inflammation-associated Bacteroides 2 (Bact2)-enterotype, accompanied by a lower proportion of beneficial commensals (eg, <jats:italic>Akkermansia<\/jats:italic>) and a higher proportion of opportunistic bacteria (eg, <jats:italic>Streptococcus<\/jats:italic>). Patients harbouring a Bact2-enterotype reached severe steatosis at lower Fatty Liver Index (FLI) thresholds. Using Bact2-carrier status together with FLI in a predictive model significantly improved the classification of severe steatosis (accuracy 90%, receiver operating characteristics 96%) when compared with FLI alone.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Conclusion<\/jats:title>\n                  <jats:p>Gut microbiota composition and dysbiosis (defined as Bact2-enterotype) are distinctly associated with steatosis severity in MASLD\/MetS. Patient stratification by microbiota composition enhances the diagnostic classification of severe steatosis in MASLD, suggesting a potential for personalised interventions in patients with microbiota dysbiosis.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1136\/egastro-2025-100204","type":"journal-article","created":{"date-parts":[[2025,8,25]],"date-time":"2025-08-25T05:35:17Z","timestamp":1756100117000},"page":"e100204","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":5,"title":["Gut dysbiosis is linked to severe steatosis and enhances its diagnostic performance in MASLD"],"prefix":"10.1136","volume":"3","author":[{"given":"Marta","family":"Borges-Canha","sequence":"first","affiliation":[{"name":"Servi\u00e7o de Endocrinologia, Diabetes e Metabolismo, ULS S\u00e3o Jo\u00e3o, Porto, Portugal"},{"name":"Cardiovascular R&D Centre\u2014UnIC@RISE, Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7454-5802","authenticated-orcid":false,"given":"Javier","family":"Centelles-Lodeiro","sequence":"additional","affiliation":[{"name":"Department of Microbiology and Immunology, Rega Institute, KU Leuven, Laboratory of Molecular Bacteriology, Leuven, Belgium"},{"name":"Vlaams Instituut voor Biotechnologie VIB-KU Leuven Center for Microbiology, Leuven, Belgium"},{"name":"Institute of Medical Microbiology and Hygiene and Research Center for Immunotherapy (FZI), University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany"}]},{"given":"Ana Rita","family":"Leite","sequence":"additional","affiliation":[{"name":"Servi\u00e7o de Endocrinologia, Diabetes e Metabolismo, ULS S\u00e3o Jo\u00e3o, Porto, Portugal"},{"name":"Cardiovascular R&D Centre\u2014UnIC@RISE, Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto, 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Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4536-2315","authenticated-orcid":false,"given":"Diana","family":"Martins","sequence":"additional","affiliation":[{"name":"Cardiovascular R&D Centre\u2014UnIC@RISE, Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2937-974X","authenticated-orcid":false,"given":"Cl\u00e1udia","family":"Silva","sequence":"additional","affiliation":[{"name":"Cardiovascular R&D Centre\u2014UnIC@RISE, Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto, Portugal"}]},{"given":"Ant\u00f3nio Carlos","family":"Ferreira","sequence":"additional","affiliation":[{"name":"Cardiovascular R&D Centre\u2014UnIC@RISE, Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2450-0782","authenticated-orcid":false,"given":"Gwen","family":"Falony","sequence":"additional","affiliation":[{"name":"Institute of Medical Microbiology and Hygiene and Research Center for Immunotherapy (FZI), University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany"},{"name":"Host-Microbe Interactomics Group, Wageningen University, Wageningen, Netherlands"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2525-1546","authenticated-orcid":false,"given":"Rodrigo","family":"Liberal","sequence":"additional","affiliation":[{"name":"Servi\u00e7o de Gastrenterologia e Hepatologia, ULS S\u00e3o Jo\u00e3o, Porto, Portugal"}]},{"given":"Mariana","family":"Frag\u00e3o-Marques","sequence":"additional","affiliation":[{"name":"Cardiovascular R&D Centre\u2014UnIC@RISE, Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto, Portugal"}]},{"given":"Ant\u00f3nio","family":"Barros","sequence":"additional","affiliation":[{"name":"Cardiovascular R&D Centre\u2014UnIC@RISE, Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4839-1613","authenticated-orcid":false,"given":"Isabel","family":"Miranda","sequence":"additional","affiliation":[{"name":"Cardiovascular R&D Centre\u2014UnIC@RISE, Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto, Portugal"}]},{"given":"Adelino","family":"Leite-Moreira","sequence":"additional","affiliation":[{"name":"Cardiovascular R&D Centre\u2014UnIC@RISE, Department of Surgery and Physiology, Faculty of Medicine, University of Porto, Porto, Portugal"}]},{"given":"Pedro","family":"Pimentel-Nunes","sequence":"additional","affiliation":[{"name":"Department of Surgery and Physiology, University of Porto Faculty of Medicine, Porto, Portugal"},{"name":"RISE@CI-IPO 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