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In this study, we uncover the metabolic interplay that drives biofilm enhancement and examine the contribution to CAUTI severity. Through compositional and proteomic biofilm analyses, we determined that the increase in biofilm biomass stems from an increase in the protein fraction of the polymicrobial biofilm matrix. We further observed an enrichment in proteins associated with ornithine and arginine metabolism in polymicrobial biofilms compared to single-species biofilms. We show that L-ornithine secretion by\n                  <jats:italic>E. faecalis<\/jats:italic>\n                  promotes arginine biosynthesis in\n                  <jats:italic>P. mirabilis,<\/jats:italic>\n                  and that disruption of this metabolic interplay abrogates the biofilm enhancement we see\n                  <jats:italic>in vitro<\/jats:italic>\n                  and leads to significant decreases in infection severity and dissemination in a murine CAUTI model.\n                <\/jats:p>","DOI":"10.1101\/2023.03.17.533237","type":"posted-content","created":{"date-parts":[[2023,3,19]],"date-time":"2023-03-19T03:53:16Z","timestamp":1679197996000},"source":"Crossref","is-referenced-by-count":7,"title":["Metabolic interplay between\n                  <i>Proteus mirabilis<\/i>\n                  and\n                  <i>Enterococcus faecalis<\/i>\n                  facilitates polymicrobial biofilm formation and invasive disease"],"prefix":"10.64898","author":[{"given":"Benjamin C.","family":"Hunt","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vitus","family":"Brix","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joseph","family":"Vath","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Beryl L.","family":"Guterman","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Steven M.","family":"Taddei","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Brian S.","family":"Learman","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Aimee L.","family":"Brauer","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shichen","family":"Shen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jun","family":"Qu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2165-2759","authenticated-orcid":false,"given":"Chelsie E.","family":"Armbruster","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"54368","reference":[{"key":"2024060700000617000_2023.03.17.533237v3.1","unstructured":"Sabih, A. , and Leslie, S.W. 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