Hepatic Steatosis and Microbiota: A Regional Study on Patients from Western Romania

Background: /Objectives: The gut-liver axis is bidirectional and influences the body's homeostasis. Pathologies such as metabolic dysfunction-associated steatotic liver (MASL) can have detrimental effects on the human microbiome, with multiple systemic effects. Furthermore, the geographical particularities of the intestinal microbiome may influence liver disease. The study's outcome was to identify dysbiosis in a group of patients with MASL from the western region of Romania. Methods: The NGS shotgun genomic sequencing (WGS metagenomics) method was used to identify bacteria in fecal samples. The data were analyzed using IBM SPSS Statistics software. Results: Out of the 122 MASL patients included in the study, 43 (35.24%) exhibited low alpha diversity. In the subgroup with a normal biodiversity index, approximately half were identified with a Firmicutes/Bacteroidetes ratio below the lower reference value, while the remaining patients presented dysbiosis based on decreased concentrations of Proteobacteria and Prevotella, considered among the most relevant species supporting dysbiosis. A higher prevalence of Prevotella species (15.99± 13.65%) was identified in the study cohort. Conclusions: The present study demonstrates that patients with MASL from the western region of Romania exhibit criteria for intestinal dysbiosis, namely reduced bacterial diversity, along with significant alterations in populations of Firmicutes, Bacteroidetes, Proteobacteria, and Prevotella. Together, these findings suggest a possible influence of geo-cultural factors on the intestinal microbiome, highlighting the need for regionally adapted therapeutic interventions to support liver health.