{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T20:12:58Z","timestamp":1790280778703,"version":"4.1.0"},"reference-count":55,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2026,8,14]],"date-time":"2026-08-14T00:00:00Z","timestamp":1786665600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100010790","name":"Erasmus Plus","doi-asserted-by":"publisher","award":["KA107"],"award-info":[{"award-number":["KA107"]}],"id":[{"id":"10.13039\/501100010790","id-type":"DOI","asserted-by":"publisher"}]},{"award":["KA107"],"award-info":[{"award-number":["KA107"]}],"id":[{"id":"https:\/\/ror.org\/01v2m4n16","id-type":"ROR","asserted-by":"publisher"}]},{"name":"LR11ES31 project"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Microorganisms"],"abstract":"<jats:p>Hemodialysis (HD) is the most widely used renal replacement therapy for patients with end-stage renal disease (ESRD) and is frequently accompanied by long-term complications that impair quality of life, including metabolic and inflammatory disturbances. Growing evidence suggests that these complications may be linked to alterations in the gut microbiota; however, microbial composition and interaction patterns in HD patients remain incompletely characterized. In this exploratory, cross-sectional study, high throughput 16S rRNA gene sequencing was used to profile the fecal microbiota of patients undergoing hemodialysis and of healthy controls. The objective was to characterize associations between hemodialysis and gut microbial composition, ecological network organization, and predicted functional potential. Comparative analyses revealed significant differences in bacterial community structure and microbial networks in the HD cohort. Both gender and dialysis vintage were associated with variation in specific taxa, including increased detection of the Synergistetes phylum, particularly among male patients and those undergoing long-term HD. Associations were also observed between clinical and demographic factors and the relative abundance of several short-chain fatty acid-associated taxa, including members of the Lachnospiraceae and Ruminococcaceae families and the genus Bifidobacterium. Predicted functional potential (PICRUSt2) indicated distinct microbial metabolic profiles in HD patients compared with controls, particularly in pathways related to carbohydrate, nucleotide, and amino acid metabolism, with additional variation according to dialysis vintage. Overall, these findings provide an exploratory characterization of structural, compositional, and predicted functional alterations of the gut microbiota associated with hemodialysis. Although the modest cohort size precludes definitive conclusions, the results support the rationale for larger, longitudinal studies investigating microbiota-derived biomarkers and host\u2013microbiome interactions in ESRD.<\/jats:p>","DOI":"10.3390\/microorganisms14081791","type":"journal-article","created":{"date-parts":[[2026,8,14]],"date-time":"2026-08-14T08:08:29Z","timestamp":1786694909000},"page":"1791","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Gut Microbiota Signatures and Ecological Network Alterations Associated with Hemodialysis"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6128-3185","authenticated-orcid":false,"given":"Nisrine","family":"Souai","sequence":"first","affiliation":[{"name":"Laboratory of Biotechnology and Valorisation of Bio-GeoRessources, Higher Institute of Biotechnology of Sidi Thabet, BiotechPole of Sidi Thabet, University of Manouba, Ariana 2020, Tunisia"},{"name":"Department of Biology, Faculty of Sciences of Tunis, University of Tunis El Manar, Farhat Hachad Universitary Campus, Rommana, Tunis 1068, Tunisia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2953-2193","authenticated-orcid":false,"given":"Oumaima","family":"Zidi","sequence":"additional","affiliation":[{"name":"Laboratory of Biotechnology and Valorisation of Bio-GeoRessources, Higher Institute of Biotechnology of Sidi Thabet, BiotechPole of Sidi Thabet, University of Manouba, Ariana 2020, Tunisia"},{"name":"Department of Biology, Faculty of Sciences of Tunis, University of Tunis El Manar, Farhat Hachad Universitary Campus, Rommana, Tunis 1068, Tunisia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3941-0990","authenticated-orcid":false,"given":"Panagiota","family":"Stathopoulou","sequence":"additional","affiliation":[{"name":"Laboratory of Systems Microbiology and Applied Genomics, Department of Sustainable Agriculture, University of Patras, 2 Seferi St, 30100 Agrinio, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anis","family":"Bafoun","sequence":"additional","affiliation":[{"name":"Unit of Hemodialysis, Military Training Hospital, Mont Fleury, Tunis 1008, Tunisia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Oussama","family":"Souiai","sequence":"additional","affiliation":[{"name":"Laboratory of BioInformatics, BioMathematics and BioStatistics (BIMS), Institute Pasteur of Tunis, Place Pasteur, BP 74, Tunis 1002, Tunisia"},{"name":"Higher Institute of Biotechnology of B\u00e9ja, University of Jendouba, B\u00e9ja 9000, Tunisia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8302-1111","authenticated-orcid":false,"given":"Mariem","family":"Hanachi","sequence":"additional","affiliation":[{"name":"Laboratory of BioInformatics, BioMathematics and BioStatistics (BIMS), Institute Pasteur of Tunis, Place Pasteur, BP 74, Tunis 1002, Tunisia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9109-1750","authenticated-orcid":false,"given":"Elias","family":"Asimakis","sequence":"additional","affiliation":[{"name":"Laboratory of Systems Microbiology and Applied Genomics, Department of Sustainable Agriculture, University of Patras, 2 Seferi St, 30100 Agrinio, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ameur","family":"Cherif","sequence":"additional","affiliation":[{"name":"Laboratory of Biotechnology and Valorisation of Bio-GeoRessources, Higher Institute of Biotechnology of Sidi Thabet, BiotechPole of Sidi Thabet, University of Manouba, Ariana 2020, Tunisia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5642-8805","authenticated-orcid":false,"given":"Amor","family":"Mosbah","sequence":"additional","affiliation":[{"name":"Laboratory of Biotechnology and Valorisation of Bio-GeoRessources, Higher Institute of Biotechnology of Sidi Thabet, BiotechPole of Sidi Thabet, University of Manouba, Ariana 2020, Tunisia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5616-8505","authenticated-orcid":false,"given":"George","family":"Tsiamis","sequence":"additional","affiliation":[{"name":"Laboratory of Systems Microbiology and Applied Genomics, Department of Sustainable Agriculture, University of Patras, 2 Seferi St, 30100 Agrinio, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Soumaya","family":"Kouidhi","sequence":"additional","affiliation":[{"name":"Laboratory of Biotechnology and Valorisation of Bio-GeoRessources, Higher 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