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Antibiotic resistance and long-term developmental issues associated with neonatal sepsis necessitate finding new and improved treatment options. IL-27 has diverse influences on the immune response, is elevated during the neonatal period compared with adulthood, and continues to rise further during infection. Elevated levels of IL-27 early in life predispose the host to impaired control of the pathogen burden and increased mortality. This study explored the therapeutic potential of IL-27p28 antibody administration to improve treatment outcomes during murine neonatal sepsis. Sepsis was induced by subcutaneous inoculation of K1-encapsulated\n                    <jats:italic>E<\/jats:italic>\n                    .\n                    <jats:italic>coli<\/jats:italic>\n                    , and the neonatal pups were rescued with IL-27p28 monoclonal antibody. Pups that received prophylactic antibody prior to the infection demonstrated superior bacterial clearance and significant weight gain compared with controls during infection. The combination of subclinical dose of gentamicin along with IL-27p28 antibody administered 2 hours after infection, significantly improved bacterial clearance and glucose homeostasis, with reduced serum levels of IL-6 and TNF-\u03b1, vital organ damage, and improved the survival rate of infected pups compared with gentamicin alone. These findings suggest that IL-27p28 antagonization represents a promising therapeutic tool for treatment of neonatal sepsis.\n                  <\/jats:p>","DOI":"10.1172\/jci.insight.204603","type":"journal-article","created":{"date-parts":[[2026,7,23]],"date-time":"2026-07-23T16:01:12Z","timestamp":1784822472000},"source":"Crossref","is-referenced-by-count":0,"title":["IL-27 neutralization with and without antibiotics as an approach to prevent and treat neonatal sepsis"],"prefix":"10.1172","volume":"11","author":[{"given":"Madhavi","family":"Annamanedi","sequence":"first","affiliation":[{"name":"Department of Microbiology, Immunology, and Cell Biology, and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jessica M.","family":"Povroznik","sequence":"additional","affiliation":[{"name":"Department of Microbiology, Immunology, and Cell Biology, and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Samantha","family":"Arevalo-Marcano","sequence":"additional","affiliation":[{"name":"Department of Pediatrics, West Virginia University School of Medicine, Morgantown, West Virginia, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cory M.","family":"Robinson","sequence":"additional","affiliation":[{"name":"Department of Microbiology, Immunology, and Cell Biology, and"},{"name":"Vaccine Development Center, West Virginia University Health Sciences Center, Morgantown, West Virginia, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"232","published-online":{"date-parts":[[2026,7,23]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","DOI":"10.1016\/j.clp.2012.09.009"},{"key":"B2","doi-asserted-by":"publisher","DOI":"10.1586\/1744666X.2014.942288"},{"key":"B3","unstructured":"WHO. 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