1. Academic Validation
  2. Metabolic immaturity and breastmilk bile acid metabolites are central determinants of heightened newborn vulnerability to norovirus diarrhea

Metabolic immaturity and breastmilk bile acid metabolites are central determinants of heightened newborn vulnerability to norovirus diarrhea

  • Cell Host Microbe. 2024 Sep 11;32(9):1488-1501.e5. doi: 10.1016/j.chom.2024.08.003.
Amy M Peiper 1 Joyce Morales Aparicio 1 Zhengzheng Hu 1 Lufuno Phophi 1 Emily W Helm 1 Rebecca J Rubinstein 2 Matthew Phillips 1 Caroline G Williams 1 Saravanan Subramanian 3 Michael Cross 1 Neha Iyer 1 Quyen Nguyen 1 Rachel Newsome 4 Christian Jobin 4 Stephanie N Langel 5 Filemon Bucardo 6 Sylvia Becker-Dreps 2 Xiao-Di Tan 7 Paul A Dawson 8 Stephanie M Karst 9
Affiliations

Affiliations

  • 1 Department of Molecular Genetics & Microbiology, College of Medicine, University of Florida, Gainesville, FL 32610, USA.
  • 2 Department of Family Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Department of Epidemiology, Gillings School of Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
  • 3 Pediatric Mucosal Inflammation and Regeneration Research Program, Center for Pediatric Translational Research and Education, Department of Pediatrics, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA.
  • 4 Department of Medicine, College of Medicine, University of Florida, Gainesville, FL 32610, USA.
  • 5 Department of Pathology, Center for Global Health and Diseases, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA.
  • 6 Department of Family Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
  • 7 Pediatric Mucosal Inflammation and Regeneration Research Program, Center for Pediatric Translational Research and Education, Department of Pediatrics, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA; Department of Research & Development, Jesse Brown Veterans Affairs Medical Center, Chicago, IL 60612, USA.
  • 8 Department of Pediatrics, Division of Gastroenterology, Hepatology and Nutrition, Emory School of Medicine, Atlanta, GA 30329, USA.
  • 9 Department of Molecular Genetics & Microbiology, College of Medicine, University of Florida, Gainesville, FL 32610, USA. Electronic address: skarst@ufl.edu.
Abstract

The pathogenic outcome of enteric virus infections is governed by a complex interplay between the virus, intestinal microbiota, and host immune factors, with metabolites serving as a key mediator. Noroviruses bind bile acid metabolites, which are produced by the host and then modified by commensal bacteria. Paradoxically, bile acids can have both proviral and Antiviral roles during norovirus infections. Working in an infant mouse model of norovirus Infection, we demonstrate that microbiota and their bile acid metabolites protect from norovirus diarrhea, whereas host bile acids promote disease. We also find that maternal bile acid metabolism determines the susceptibility of newborn mice to norovirus diarrhea during breastfeeding. Finally, targeting maternal and neonatal bile acid metabolism can protect newborn mice from norovirus disease. In summary, neonatal metabolic immaturity and breastmilk bile acids are central determinants of heightened newborn vulnerability to norovirus disease.

Keywords

ASBT; bile acids; breastmilk metabolites; enteromammary; gut-mammary; microbial metabolites; microbiota; neonatal infections; newborn infections; norovirus.

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