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Bacterial infection, especially in patients with decompensated cirrhosis, commonly triggers ACLF and is difficult to treat with antibiotics. Therefore, finding alternative strategies for preventing and managing bacterial infection is an urgent priority. Here, we observed that patients with bacterial infection and decompensated cirrhosis, as well as ACLF mice, exhibited lower fecal panose levels than uninfected controls.\n                    <jats:italic>Megamonas funiformis<\/jats:italic>\n                    , with 4\u03b1-glucanosyltransferase (4\u03b1GT) as a key enzyme for panose production, was identified as a potential panose producer. Animal experiments demonstrated that panose efficiently reduced liver injury and extended survival in ACLF mice by mitigating bacterial infection. Further results revealed that panose enhanced resistance to bacterial infection by inhibiting oxidative stress\u2013induced gut barrier disruption, thereby limiting bacterial dissemination. Mechanistically, panose interacted with the solute carrier family 7 member 11 (SLC7A11, also known as xCT) protein to boost antioxidant glutathione levels in intestinal epithelial cells. These findings highlight panose\u2019s potential in preventing bacterial infection, offering a valuable insight into mitigating ACLF progression.\n                  <\/jats:p>","DOI":"10.1172\/jci184653","type":"journal-article","created":{"date-parts":[[2025,6,6]],"date-time":"2025-06-06T12:27:48Z","timestamp":1749212868000},"source":"Crossref","is-referenced-by-count":6,"title":["Panose prevents acute-on-chronic liver failure by reducing bacterial infection in mice"],"prefix":"10.1172","volume":"135","author":[{"given":"Jiaxin","family":"Li","sequence":"first","affiliation":[{"name":"Department of Pathophysiology, Guangdong Provincial Key Laboratory of Proteomics, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shihao","family":"Xie","sequence":"additional","affiliation":[{"name":"Department of Pathophysiology, Guangdong Provincial Key Laboratory of Proteomics, School of Basic Medical 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