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Using integrated multi-omics (metagenomics and metatranscriptomics), we analyse microbiome gene co-expression networks in Parkinson\u2019s disease (PD) and healthy controls (HC). We observe a significant depletion of hub genes in PD, including genes involved in secondary bile acid biosynthesis, bacterial microcompartments (BMCs), polysaccharides transport and flagellar assembly (FA).\n                    <jats:italic>Blautia<\/jats:italic>\n                    ,\n                    <jats:italic>Roseburia<\/jats:italic>\n                    ,\n                    <jats:italic>Faecalibacterium<\/jats:italic>\n                    and\n                    <jats:italic>Anaerobutyricum<\/jats:italic>\n                    genera are the main contributors to these functions, showing significantly lower expression in PD. Additionally, we identify a strong correlation between BMC and FA expression, and an apparent dysregulation in cross-feeding between commensals in PD. Finally, PD also exhibits reduced gene expression diversity compared to HC, whereby higher gene expression correlates with greater diversity. We identify disruptions in gut metabolic functions, at both taxonomic and functional level, and microbiome-wide ecological features, highlighting targets for future gut microbiome restoration efforts.\n                  <\/jats:p>","DOI":"10.1038\/s41522-025-00780-0","type":"journal-article","created":{"date-parts":[[2025,7,24]],"date-time":"2025-07-24T05:00:38Z","timestamp":1753333238000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Human gut microbiome gene co-expression network reveals a loss in taxonomic and functional diversity in Parkinson\u2019s disease"],"prefix":"10.1038","volume":"11","author":[{"given":"R\u00e9my","family":"Villette","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Polina V.","family":"Novikova","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"C\u00e9dric C.","family":"Laczny","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Brit","family":"Mollenhauer","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Patrick","family":"May","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paul","family":"Wilmes","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2025,7,24]]},"reference":[{"key":"780_CR1","doi-asserted-by":"publisher","first-page":"14","DOI":"10.1016\/j.neurol.2015.09.012","volume":"172","author":"A Elbaz","year":"2016","unstructured":"Elbaz, A., Carcaillon, L., Kab, S. & Moisan, F. 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