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Abdelgawad A, Nicola T, Martin I, Halloran BA, Tanaka K, Adegboye CY, Jain P, Ren C, Lal CV, Ambalavanan N, O'Connell AE, Jilling T, Willis KA. Antimicrobial peptides modulate lung injury by altering the intestinal microbiota. Microbiome 2023; 11:226. [PMID: 37845716 PMCID: PMC10578018 DOI: 10.1186/s40168-023-01673-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 09/21/2023] [Indexed: 10/18/2023]
Abstract
BACKGROUND Mammalian mucosal barriers secrete antimicrobial peptides (AMPs) as critical, host-derived regulators of the microbiota. However, mechanisms that support microbiota homeostasis in response to inflammatory stimuli, such as supraphysiologic oxygen, remain unclear. RESULTS We show that supraphysiologic oxygen exposure to neonatal mice, or direct exposure of intestinal organoids to supraphysiologic oxygen, suppresses the intestinal expression of AMPs and alters intestinal microbiota composition. Oral supplementation of the prototypical AMP lysozyme to hyperoxia-exposed neonatal mice reduced hyperoxia-induced alterations in their microbiota and was associated with decreased lung injury. CONCLUSIONS Our results identify a gut-lung axis driven by intestinal AMP expression and mediated by the intestinal microbiota that is linked to lung injury in newborns. Together, these data support that intestinal AMPs modulate lung injury and repair. Video Abstract.
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Affiliation(s)
- Ahmed Abdelgawad
- Division of Neonatology, Department of Pediatrics, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Teodora Nicola
- Division of Neonatology, Department of Pediatrics, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Isaac Martin
- Division of Neonatology, Department of Pediatrics, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Brian A Halloran
- Division of Neonatology, Department of Pediatrics, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Kosuke Tanaka
- Division of Neonatology, Department of Pediatrics, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Comfort Y Adegboye
- Division of Newborn Medicine, Department of Pediatrics, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - Pankaj Jain
- Division of Neonatology, Department of Pediatrics, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Changchun Ren
- Division of Neonatology, Department of Pediatrics, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Charitharth V Lal
- Division of Neonatology, Department of Pediatrics, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Namasivayam Ambalavanan
- Division of Neonatology, Department of Pediatrics, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Amy E O'Connell
- Division of Newborn Medicine, Department of Pediatrics, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - Tamás Jilling
- Division of Neonatology, Department of Pediatrics, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Kent A Willis
- Division of Neonatology, Department of Pediatrics, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA.
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